Author Topic: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)  (Read 65889 times)

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Offline tunkTopic starter

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Yet another oscilloscope+multimeter combo, Zeeweii DSO3D12:
- bandwidth 120MHz
- sample rate 250MSps
- rise time <3ns
- time base 5ns - 10s
- vertical sensitivity 10mV/div - 10V/div
- screen 3.2"
- signal generator
http://www.sigpeak.com/download/zeeweii-DSO3D12_manual_EN.pdf

Screen dumps from the manual:
« Last Edit: June 23, 2023, 04:21:53 pm by tunk »
 
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Offline Aldo22

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How did you find this? :D
Doesn't seem official yet.
It has "voice assistants."
Not sure what to make of it.
At least they differentiate now: Sampling rate 250Msa/s and Equivalent sample 500M
 

Offline tunkTopic starter

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How did you find this? :D
I was looking for info about the DSO154pro, and
looking at their support page, I found this manual.
 
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Offline Aldo22

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It probably won't be expensive.
The DMM specs aren't that great afaics. It doesn't even have a fuse at 10A.  :o
It also has less storage depth and a weaker signal generator than the DSO2512G.
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #4 on: August 07, 2023, 09:35:49 pm »
More information, but no prices known yet.
http://www.zeeweii.com/productinfo/dso3d12.html
« Last Edit: August 07, 2023, 09:42:11 pm by Aldo22 »
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #5 on: August 09, 2023, 10:10:30 pm »
Now it's showing up on Aliexpress for ~$100.

https://www.aliexpress.com/item/1005005923929699.html
 

Offline siealex

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #6 on: August 10, 2023, 12:22:30 am »
Right after the day my ZT702S arrived...
 

Offline tunkTopic starter

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #7 on: August 11, 2023, 07:29:21 pm »
Zeeweii has released a short demo: https://youtu.be/4YxVkRbYkwY
 

Offline yoga

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #8 on: August 11, 2023, 08:42:38 pm »
Is it worth the money now that is available on aliexpress, but not for 100$ .

I saw 110€ instead of 90€ or less I had expected.

Not sure if it will deliver or might only claim the specs like so many others before.
thanks
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #9 on: August 11, 2023, 09:35:40 pm »
Is it worth the money now that is available on aliexpress, but not for 100$ .

I saw 110€ instead of 90€ or less I had expected.

Yes, it costs $100.
You can't just convert the price that way.
Aliexpress has different prices for different countries which vary depending on taxes etc.
Your euro price includes VAT.
For example, the Swiss price does not include taxes (CHF 88.40).
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #10 on: August 13, 2023, 09:47:35 am »
Screen dumps from the manual:
The specifications have been changed.
Now the storage depth is also 128k, like on the DSO2512G.
I think the oscilloscope part is more or less taken over from the DSO2512G.
The screen is a bit bigger (3.2 inch), but I think the resolution is the same for the oscilloscope.

Apparently the signal generator is a little less powerful.
There are contradictory data here.
The ZEEWEII Official Store says "1Hz-2MHz", the manual says: "5MHz(sin) 1MHz(other)".
And "Note: When the set frequency is greater than 1MHz, the square wave signal may show small horizontal jitter".
On DSO2512G I have not seen such jitter.
 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #11 on: August 13, 2023, 10:13:15 am »
I did buy one, just for trying out.
 
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Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #12 on: August 13, 2023, 10:23:41 am »
I did buy one, just for trying out.
You must have a pretty big toy budget?  :-+
 

Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #13 on: August 13, 2023, 10:26:45 am »
Looks good!

 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #14 on: August 13, 2023, 10:32:38 am »
I did buy one, just for trying out.
You must have a pretty big toy budget?  :-+
did get some unexpected money. :-DD


 
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Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #15 on: August 14, 2023, 12:26:05 pm »
Zeeweii published a video on the voice assistant.
Its a missed chance that there is no reading out of the measured values in the DMM.

 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #16 on: August 14, 2023, 12:39:54 pm »
Zeeweii published a video on the voice assistant.
It's certainly fun, but I'm not sure I really would want to use this feature...  ::)
 

Offline dietert1

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #17 on: August 14, 2023, 03:16:47 pm »
If the instrument works well, then the voice assistant is an amazing idea. While handling probes this can be very nice.

Regards, Dieter 
 
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Offline Veteran68

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #18 on: August 14, 2023, 03:35:56 pm »
Zeeweii published a video on the voice assistant.

That's actually pretty impressive performance, seems to recognize and respond better than Alexa and Siri for me!

Agreed that it's more of a novelty that probably won't get used unless my hands are busy, but then it would come in really handy (*cough*).
 

Offline MadTux

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #19 on: August 14, 2023, 09:44:32 pm »
"50Ohm termination!"

Poof!
 

Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #20 on: August 15, 2023, 05:57:26 am »
Damn, these look good. Exactly what I need for my carry case.

I'm saving up for my Rigol DHO800 though. Decisions, decisions.
 

Offline Smajdalf

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #21 on: August 15, 2023, 10:09:03 am »
It is very interesting device! I have a few questions about it that are not clear from the video and manual:
1) The DMM may be used together with the DSO and generator and the DMM is galvanically isolated? If true it makes the device much more useful compared to other 2(3) in 1 devices.
2) How exactly works the reference waveform? Only a waveform currently on display can be used as a reference or also some trace saved in the memory? Does the reference scale and move with the corresponding channel when the sensitivity or time base is changed/moved? Two reference waveforms are shown in the pictures. I expect each one corresponds to one particular channel - is there an option to show only one of them (despite using both channels)? Or even use two references for a single channel?
3) Is the FFT useful? AFAIK DSO2512G only shows some graph without any indication about the quantities. I did not discover any way to know what frequency (or magnitude) a given peak has.
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #22 on: August 15, 2023, 10:29:35 am »
2) How exactly works the reference waveform? Only a waveform currently on display can be used as a reference or also some trace saved in the memory? Does the reference scale and move with the corresponding channel when the sensitivity or time base is changed/moved? Two reference waveforms are shown in the pictures. I expect each one corresponds to one particular channel - is there an option to show only one of them (despite using both channels)? Or even use two references for a single channel?
3) Is the FFT useful? AFAIK DSO2512G only shows some graph without any indication about the quantities. I did not discover any way to know what frequency (or magnitude) a given peak has.

No one has this device yet, as far as I know. So one can only guess.

As I wrote above, I assume that the oscilloscope part was taken over from the DSO2512G. Everything looks pretty much the same to me.
The reference waveform is more or less a screenshot that does not react to sensitivity or time base.
FFT will also not be different from DSO2512G.
But for this price you can't expect miracles.
 

Offline Smajdalf

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #23 on: August 18, 2023, 07:49:42 am »
I know the device is very fresh. But sometimes the Aliexpress ships really quickly so I was hoping someone (RAPo?) already have one or may get one in coming days. The "marketing pictures" somewhat answer some of my questions (if they can be trusted):

To the DMM:
Quote
Built-in true RMS multimeter (...) osciloscope and multimeter may be used simultaneously (small window in the upper left corner)
That is promising, but
Quote
Use an isolation transformer + isolation optocoupler chip to isolate the multimeter from the oscilloscope, so you don't have to worry about common ground. (When measuring high voltage, the multimeter and oscilloscope cannot be used at the same time.)
What the phrase in the parenthesis means?
Also from the information available it seems the DMM is 3-5/6 digit (6000 counts) which is quite good but the current ranges are limited - only 600 mA and 10A range meaning only 100 uA resolution.

To the FFT:
Quote
Note: FFT can only display spectograms, frequency measurement is not supported.
The same as DSO2512G.

You say
As I wrote above, I assume that the oscilloscope part was taken over from the DSO2512G. Everything looks pretty much the same to me.
The reference waveform is more or less a screenshot that does not react to sensitivity or time base.
FFT will also not be different from DSO2512G.
AFAIK my DSO2512G cannot show reference and cannot show the split screen Zoom view - those two features I am missingand consider them a great upgrade. Your DSO2512G can show the reference somehow?
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #24 on: August 18, 2023, 08:04:18 am »
AFAIK my DSO2512G cannot show reference and cannot show the split screen Zoom view - those two features I am missingand consider them a great upgrade. Your DSO2512G can show the reference somehow?
Reference waveform is even documented in the manual of the DSO2512G (See attachment).

Zoom view seems to be available for DSO2512G in the latest versions, according to ptluis:
https://www.eevblog.com/forum/testgear/new-2ch-pocket-dsosg-sigpeak-dso2512g/msg4984915/#msg4984915
« Last Edit: August 18, 2023, 08:06:04 am by Aldo22 »
 
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Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #25 on: August 18, 2023, 08:24:28 am »
Estimated delivery date = 30th august. A little bit of patience is needed. :-DD

I know the device is very fresh. But sometimes the Aliexpress ships really quickly so I was hoping someone (RAPo?) already have one or may get one in coming days. The "marketing pictures" somewhat answer some of my questions (if they can be trusted):
« Last Edit: August 18, 2023, 02:10:00 pm by RAPo »
 

Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #26 on: August 18, 2023, 10:19:33 am »
 

Offline wasedadoc

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #27 on: August 18, 2023, 12:28:50 pm »
I just found the manual for this online:

http://www.sigpeak.com/download/zeeweii-DSO3D12_manual_EN.pdf
That same link was in the very first post 8 weeks ago.
 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #28 on: August 21, 2023, 02:36:04 pm »
The Zeeweii DSO3D12 is in.
Did a little basic testing: all seems to be working.
First complaint: I don't like the output pins for the Gen. Will modify it to banana jacks.

Have a basic question: how do I get the saved images to the PC? Asked Zeeiweii for assistance.
Very nice feature: you can save images with a black background or inverted + you can select the color for the 2nd channel.
Especially for you guys I did open the scope. See the images below.
Hires will follow later.

Yes, you can use scope+ gen+dmm (in a little window) together.
You cannot use the DMM while USB is connected.
Indeed the FFT is the same as on the DSO2512G, only reference no measuring.
« Last Edit: August 21, 2023, 03:17:17 pm by RAPo »
 
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Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #29 on: August 22, 2023, 07:06:22 am »
Got a message from Zeeweii:

Quote
DSO3D12 does not support transferring images to PC.
|O

I asked to add this in a firmware update.
 
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Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #30 on: August 22, 2023, 07:37:58 am »
Results from DMMCheckplus for the DMM:
 
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Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #31 on: August 22, 2023, 08:33:57 am »
Thanks for testing and opening.

Does it actually have a rubber-like housing like the DSO2512G or is it hard?
I find that quite practical with the DSO2512G. It does not slip and does not fall down e.g. somewhere in the engine compartment.

Got a message from Zeeweii:
Quote
DSO3D12 does not support transferring images to PC.

Yes, it also has no AV output afaics.

I still think DSO2512G + AN870 is the better equipment in this price range for my case.
« Last Edit: August 22, 2023, 08:35:37 am by Aldo22 »
 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #32 on: August 22, 2023, 08:49:09 am »
It's a hard plastic.
Indeed no AV output, but that doesn't bother me.
If I hook it up to an USB port a USB serial  CH340 com port comes in the system, no way to get to the files.
I think you are right regarding the combo.

Does it actually have a rubber-like housing like the DSO2512G or is it hard?
I find that quite practical with the DSO2512G. It does not slip and does not fall down e.g. somewhere in the engine compartment.

Yes, it also has no AV output afaics.

I still think DSO2512G + AN870 is the better equipment in this price range for my case.
 
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Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #33 on: August 22, 2023, 09:19:25 am »
After what I had written here:
What is the bandwidth of the signal generator (sine/other)?

Do you see the jitter?
Zeeweii writes "When the set frequency is greater than 1MHz, the square wave signal may show small horizontal jitter".

Is the voice assistant usable in practice?

Is the screen looking good?

Thanks!
 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #34 on: August 22, 2023, 10:01:07 am »
sine wave max 5MHz, square wave and others max 2MHz.
Horizontal jitter starts at 1.02MHz (sine), 1.01 MHz square but is not really noticeable.
For a 50% square wave:
   1kHz Vpp=2.53V Duty = 50%
   1MHz Vpp=2.49V Duty = 49.5%
   2MHz Vpp=2.47V Duty = 48.6%-49.6%

Didn't try out the voice assistant yet.
Screen quality is the same as the DSO2512G
« Last Edit: August 22, 2023, 10:07:54 am by RAPo »
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #35 on: August 22, 2023, 10:10:40 am »
Thank you!

Screen quality is the same as the DSO2512G

But it should be bigger and better (According to the advertisement)?



 

Offline ptluis

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #36 on: August 22, 2023, 10:14:10 am »
Got a message from Zeeweii:

Quote
DSO3D12 does not support transferring images to PC.
|O

I asked to add this in a firmware update.

I don't understand how they manage to launch a new product and remove important features.  Voice activation is interesting but then they fail at unthinkable things.  And to transfer images to the computer, well, we have to use a smartphone
 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #37 on: August 22, 2023, 10:34:16 am »
Indeed quite incomprehensible.
phone + OTG would be nice, but isn't there.  |O.

I don't understand how they manage to launch a new product and remove important features.  Voice activation is interesting but then they fail at unthinkable things.  And to transfer images to the computer, well, we have to use a smartphone
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #38 on: August 22, 2023, 10:36:02 am »
But it should be bigger and better (According to the advertisement)?
Yes, it is bigger, no doubt about that, but I find the quality more or less the same.
 
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Offline ptluis

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #39 on: August 22, 2023, 01:39:37 pm »
Indeed quite incomprehensible.
phone + OTG would be nice, but isn't there.  |O.

phone camera  :palm:
 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #40 on: August 22, 2023, 01:55:11 pm »
I'll know, I'll know  ;D
Indeed quite incomprehensible.
phone + OTG would be nice, but isn't there.  |O.

phone camera  :palm:
 

Offline siealex

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #41 on: August 22, 2023, 04:36:55 pm »
Quote
I don't understand how they manage to launch a new product and remove important features.
To make them subscription based.
 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #42 on: August 22, 2023, 05:27:40 pm »
Strange triggering.
I'm applying a 1kHz square wave with a 1% duty cycle (from the Fnirsi DPOX) and zooming out to 10ms.
A block of square waves randomly flops from right to left on the screen.
 
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Offline ptluis

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #43 on: August 22, 2023, 09:24:05 pm »
Strange triggering.
I'm applying a 1kHz square wave with a 1% duty cycle (from the Fnirsi DPOX) and zooming out to 10ms.
A block of square waves randomly flops from right to left on the screen.

why is the scope in AC coupling?
 

Offline wasedadoc

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #44 on: August 22, 2023, 10:02:16 pm »
Strange triggering.
I'm applying a 1kHz square wave with a 1% duty cycle (from the Fnirsi DPOX) and zooming out to 10ms.
A block of square waves randomly flops from right to left on the screen.

why is the scope in AC coupling?
Why would that have any influence on the issue that RAPo is querying?
 

Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #45 on: August 22, 2023, 10:07:36 pm »
Strange triggering.
I'm applying a 1kHz square wave with a 1% duty cycle (from the Fnirsi DPOX) and zooming out to 10ms.
A block of square waves randomly flops from right to left on the screen.

1% duty is very narrow. The display is probably missing the peaks if they don't line up properly with the decimation filter.

(or they're going in and out of phase with it, which is probably what you're seeing)

What happens if you zoom in? I think they should appear.
 

Offline ptluis

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #46 on: August 22, 2023, 11:36:27 pm »
Strange triggering.
I'm applying a 1kHz square wave with a 1% duty cycle (from the Fnirsi DPOX) and zooming out to 10ms.
A block of square waves randomly flops from right to left on the screen.

why is the scope in AC coupling?
Why would that have any influence on the issue that RAPo is querying?

I didn't say it had influence, I asked why it was in AC coupling.
 

Offline RAPo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #47 on: August 23, 2023, 07:13:13 am »
why is the scope in AC coupling?
no particular reason, I started with DC then retest with AC coupling and no difference then I made the photo.
« Last Edit: August 23, 2023, 08:27:15 am by RAPo »
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #48 on: August 23, 2023, 07:15:00 am »
1% duty is very narrow. The display is probably missing the peaks if they don't line up properly with the decimation filter.
(or they're going in and out of phase with it, which is probably what you're seeing)
What happens if you zoom in? I think they should appear.
If I zoom in, the signal is triggered.
Will investigate this some more.
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #49 on: August 23, 2023, 08:25:32 am »
I'm applying a 1kHz square wave with a 1% duty cycle (from the Fnirsi DPOX) and zooming out to 10ms.
A block of square waves randomly flops from right to left on the screen.
Maybe that's not such a bad thing.
The Zeeweii tells you this way that the resolution is not enough to display the signal reasonably.
Whatever it shows (all yellow, all transparent, what do you expect it to show?) it's wrong anyway ;-)

Just the screen alone: How many 1% peaks can you adequately display with 360 pixels?

My 2 ¢
« Last Edit: August 23, 2023, 08:30:04 am by Aldo22 »
 

Offline dietert1

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #50 on: August 23, 2023, 09:22:15 am »
I'd guess the trigger is derived from digitized input and for power saving (battery live) there is no full rate sampling with decimation. So trigger will depend on sampling rate. If you know your instrument, you can work around this.

Regards, Dieter
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #51 on: August 23, 2023, 09:39:31 am »
If I zoom in, the signal is triggered.
Will investigate this some more.

The signal is always triggered, you just can't see the signal.

This sort of signal is why some 'scopes have a "peak detect" mode.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #52 on: August 23, 2023, 01:02:26 pm »
Maybe,
I did some further research (this time with Juntek PSG9080):

DC 2.10% display is okay at 10ms.
DC 2.00% display is not stable triggered at 10ms.
DC 1.99% a slight running black peak in the screen at 10ms
DC 1.98% the flip-flopping occurs at 10ms
From 5ms and lower, no flip-flopping.
See the photo for the 1% peaks.
From 5ms and lower, you can count the peaks easily. At 10ms, it is unworkable.


Maybe that's not such a bad thing.
The Zeeweii tells you this way that the resolution is not enough to display the signal reasonably.
Whatever it shows (all yellow, all transparent, what do you expect it to show?) it's wrong anyway ;-)

Just the screen alone: How many 1% peaks can you adequately display with 360 pixels?

My 2 ¢
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #53 on: August 23, 2023, 01:05:11 pm »
Maybe,
I did some further research (this time with Juntek PSG9080):

DC 2.10% display is okay at 10ms.
DC 2.00% display is not stable triggered at 10ms.
DC 1.99% a slight running black peak in the screen at 10ms
DC 1.98% the flip-flopping occurs at 10ms
From 5ms and lower, no flip-flopping.
See the photo for the 1% peaks.
From 5ms and lower, you can count the peaks easily. At 10ms, it is unworkable.

Sounds about right.
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #54 on: August 23, 2023, 01:17:04 pm »
I meant stable triggered::)
It would be great if these scopes had other trigger types than edge-trigger.

The signal is always triggered, you just can't see the signal.

This sort of signal is why some 'scopes have a "peak detect" mode.
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #55 on: August 23, 2023, 01:19:25 pm »
yes, but I would like to have some more control upfront.

I'd guess the trigger is derived from digitized input and for power saving (battery live) there is no full rate sampling with decimation. So trigger will depend on sampling rate. If you know your instrument, you can work around this.

Regards, Dieter
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #56 on: August 23, 2023, 08:17:56 pm »
Strange triggering.
I'm applying a 1kHz square wave with a 1% duty cycle (from the Fnirsi DPOX) and zooming out to 10ms.
A block of square waves randomly flops from right to left on the screen.

You try to replicate on the dso2512g and you will see something interesting  :) it flickers/disappear... I tried with a utg962 FG. could this be related to the low memory of the device ? low sample rate?
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #57 on: August 23, 2023, 09:16:52 pm »
could this be related to the low memory of the device ? low sample rate?

Just very narrow pulses on screen and no "peak detect" mode to display them.

Zoom in a bit and you'll see them just fine.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #58 on: August 24, 2023, 08:29:25 am »
could this be related to the low memory of the device ? low sample rate?

Just very narrow pulses on screen and no "peak detect" mode to display them.

Zoom in a bit and you'll see them just fine.

at 5ms and bellow work fine, 10ms and above strange things happen on display.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #59 on: August 24, 2023, 08:33:55 am »
Strange triggering.
I'm applying a 1kHz square wave with a 1% duty cycle (from the Fnirsi DPOX) and zooming out to 10ms.
A block of square waves randomly flops from right to left on the screen.

Hi RAPo, did you try doing this on dpox180h? I wonder how it behaves, just curious.

 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #60 on: August 24, 2023, 10:28:30 am »
Hi RAPo, did you try doing this on dpox180h? I wonder how it behaves, just curious.

ANY DSO will do this if it isn't set to peak detect mode (assuming it has one).

(...or some variant of this)
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #61 on: August 24, 2023, 10:31:55 am »
Just did.

1kHz from PSG9080 on the DPOX gives:
Duty cycle 2% no flip-flopping, freq measure alternates between 44.73Hz and 45.13Hz (no kHz!)  and DC=2.66% at 10ms.
Duty cycle 1% no flip-flopping, freq measure alternates between 38.35Hz and 39.15Hz (no kHz!)  and DC=1.25% at 10ms.

You can count individual pulses from 5ms onwards.

« Last Edit: August 24, 2023, 05:15:09 pm by RAPo »
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #62 on: August 24, 2023, 05:16:54 pm »
Got a message from Zeeweii:

Quote
Thanks for your suggestion, I have given feedback to the engineer.



Got a message from Zeeweii:

Quote
DSO3D12 does not support transferring images to PC.
|O

I asked to add this in a firmware update.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #63 on: August 24, 2023, 09:16:35 pm »
could this be related to the low memory of the device ? low sample rate?

Just very narrow pulses on screen and no "peak detect" mode to display them.

Zoom in a bit and you'll see them just fine.

At 5ms displays just fine. Sometimes my brain gets dump  |O... How did I forgot about peak trigger  :palm:... of course these cheap devices like dso2512g and dpox180h are very limited in trigger options, and that's one of my suggestions to zeeweii, to add more trigger options.
« Last Edit: August 24, 2023, 09:20:32 pm by ptluis »
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #64 on: August 24, 2023, 09:56:37 pm »


I asked to add this in a firmware update.

The engineer will have a lot to do in the near future, 16 suggestions including bugs in dso2512g, plus those in DSO3D12... the next firmware will be released in 2024-5 or in the form of a new device  :scared:
 
These low-priced products are sold in parts. Each new product includes one or two new to the market features. After we buy it, we see that important features are missing, so we require to add and improve the device. Then they launch a new device with 1 or 2 new features + 1 or 2 of the requested ones and off we go to buy another one... This is how several versions of the device are launched. In the end we just have to put them together on the table to have a complete device, like a puzzle.

My friend we are in the same struggle  :box:
 
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #65 on: August 24, 2023, 10:05:42 pm »
The engineer will have a lot to do in the near future, 16 suggestions including bugs in dso2512g, plus those in DSO3D12... the next firmware will be released in 2024-5 or in the form of a new device  :scared:

I think they should open-source these, that way they can concentrate on making hardware (which is probably what they enjoy most).

They sell the next generation by upgrading the bandwidth or the ADC or the FPGA or the memory...

I guess they're scared that other companies could clone the hardware and then they make nothing. I don't really see how they could undercut them though and plenty of people would want "originals" even if they cost 10 bucks more (I would...)

If they're releasing the next generation they'll always be a few months ahead of the cloners anyway. The important thing is to establish the Zeeweii brand.   :)
« Last Edit: August 24, 2023, 10:08:25 pm by Fungus »
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #66 on: August 25, 2023, 12:36:53 am »
The engineer will have a lot to do in the near future, 16 suggestions including bugs in dso2512g, plus those in DSO3D12... the next firmware will be released in 2024-5 or in the form of a new device  :scared:

I think they should open-source these, that way they can concentrate on making hardware (which is probably what they enjoy most).

They sell the next generation by upgrading the bandwidth or the ADC or the FPGA or the memory...

I guess they're scared that other companies could clone the hardware and then they make nothing. I don't really see how they could undercut them though and plenty of people would want "originals" even if they cost 10 bucks more (I would...)

If they're releasing the next generation they'll always be a few months ahead of the cloners anyway. The important thing is to establish the Zeeweii brand.   :)

the firmware update of the dso2512g is based on the dso1511g firmware,  there's references inside the file, so they keep releasing new devices with peaces of the puzzle. maybe it could be possible to reverse engineer this firmware. the problem here could be the fact that exists at least 3 base firmware versions, each for different hardware revisions, and creating a custom firmware could not be a simple task. maybe yes maybe no, I'm no expert.
« Last Edit: August 25, 2023, 12:42:55 am by ptluis »
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #67 on: August 25, 2023, 06:46:48 am »
the firmware update of the dso2512g is based on the dso1511g firmware,  there's references inside the file

Obviously there's going to be a lot of common code.

creating a custom firmware could not be a simple task. maybe yes maybe no, I'm no expert.

It's not trivial but a lot of progress has been made on other devices:
https://www.eevblog.com/forum/projects/reverse-engineering-fnirsi-5012h/
https://www.eevblog.com/forum/testgear/fnirsi-1013d-100mhz-tablet-oscilloscope/1400/
 
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Offline wasedadoc

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #68 on: November 12, 2023, 07:08:39 pm »
Some info on the DSO3D12 FFT which is not in the manual.  I have derived this by experimental observation.  Maybe also applicable to the DSO2512G?

1.  In all three modes the frequency axis (horizontal) is linear and ranges from 0 at the left to a frequency determined by the
timebase setting.  That frequency is 25 divided by the time per division and holds for all timebase settings not faster than 500ns
per division.  So the extremes are 10s per division which makes the range 0 to 2.5Hz and 500ns which makes the range 0 to 50MHz.
Selecting 1ms/div gives 0 to 25kHz which may be appropriate for audio.

2.  In the music mode, the amplitude response (Y axis) is linear.

3.  In log(arithmic) mode the vertical axis is NOT 10db/div.  Looks like each division corresponds to a factor of 8 times larger or
smaller.  (Maybe some simple mapping from the binary numbers.)  The absolute levels are related to the Volts/div setting in a simple
manner.  The penultimate line from the top is reached when the RMS value of the input sine wave component at that frequency is equal to the Volts/div setting. For example, if the input is 200mV RMS and the sensitivity is 200mV/div the spectral line will reach the
horizontal line below the top one.
 
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Offline shakalnokturn

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #69 on: January 12, 2024, 12:21:07 am »
Just sold my Hantek 2D42 pocket/toy scope, it was handy for basic field work, screen was a little small to my liking but mainly the UI for getting around the scope adjustments was so counter intuitive it drove me nuts.

Looking at the chart here:
https://www.eevblog.com/forum/testgear/portable-oscilloscopes-list/msg5194335/

It seems the Zeeweii DSO3D12 would suit me better for screen size and UI, at least they have separate Volts & time / div. keys which make more sense to me than general purpose direction keys.
I don't think much of the AWG (although I don't care for that much) or overall build quality compared to the Hantek or Owon HDS, it clearly looks more of a toy.

Could any owners out here who would willingly admit it if they consider they've wasted money give me their overall impressions.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #70 on: January 12, 2024, 11:21:17 am »
Just sold my Hantek 2D42 pocket/toy scope, it was handy for basic field work, screen was a little small to my liking but mainly the UI for getting around the scope adjustments was so counter intuitive it drove me nuts.

Looking at the chart here:
https://www.eevblog.com/forum/testgear/portable-oscilloscopes-list/msg5194335/

It seems the Zeeweii DSO3D12 would suit me better for screen size and UI, at least they have separate Volts & time / div. keys which make more sense to me than general purpose direction keys.
I don't think much of the AWG (although I don't care for that much) or overall build quality compared to the Hantek or Owon HDS, it clearly looks more of a toy.

Could any owners out here who would willingly admit it if they consider they've wasted money give me their overall impressions.
I bought one for the occasions when I don't need, and cannot be bothered to unbox and fire up, my Rigol DS1054Z.  I don't regret buying it and haven't come across any serious bugs.  I have no complaints about the build quality. Some slight negatives are:

1.  Although dual channel, there are no math functions, not even CH1 minus CH2.

2.  Like most of these small 'scopes the triggering options are very limited.  Basically rising or falling edge and adjustable level.

3.  Dual channel mode does not appear to compensate for the interleaved sampling.  If you put the same input into both channels the traces are separated by a few nanoseconds.  Not a big problem if you are aware of it.

4.  I have not found the voice command feature to be particularly useful.  IMHO would have been better to have spoken output of the multimeter readings.

There is quite a good review at

and a second part at

Some instructions at
« Last Edit: January 12, 2024, 11:51:08 am by wasedadoc »
 
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Offline flywheelz

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #71 on: January 12, 2024, 10:23:07 pm »
shakalnokturn
have you seen Zoyi ZT703s, also 3.5" screen 2ch?
 

Offline shakalnokturn

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #72 on: January 18, 2024, 11:02:13 pm »
Thanks to wasedadoc for the review links, they were useful.
Thanks to flywheelz for pointing me to the Zoyi toy, it looks quite good unfortunately AFAICT it has the typical direction keys UI that I'd like to avoid. Flipping around menus for changing the most frequently used settings just doesn't make sense to me. If I see one going really cheap I'll give it a try though...
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #73 on: January 22, 2024, 06:52:32 pm »
I fitted a SMA connector to the side of the back cover, for the sig.gen output.
Works much better then the 2 prongs on the top. Also made sure it does not interfere with anything on the inside.
The SMA connector is designed for at least 12GHz and  50 Ω impedance, so should be OK for this application.
Yes, it should have been a female connector, but I only had a male around. :palm:  ;) 
« Last Edit: January 22, 2024, 06:58:33 pm by jdev99 »
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #74 on: February 26, 2024, 12:15:28 pm »
Voice Assistant built around Unisound US665P31 processor and OPA62.
Allmost no info except a couple of words about similar system:
https://www.hackster.io/news/icstation-s-5-su-10a-packs-an-on-board-unisound-us516p6-for-offline-voice-recognition-work-680799a416e7
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #75 on: March 26, 2024, 02:18:10 am »
The SMA connector is designed for at least 12GHz and  50 Ω impedance, so should be OK for this application.
Did you verify that the generator output is 50 ohms?
Bill  (Currently a Siglent fanboy)
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Offline Dave_g8

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #76 on: March 29, 2024, 10:04:24 am »
Hi Bill,
I don’t have a DSO3D12, but the AWG output circuit is probably similar to that on the other models.

The DSO154Pro output circuit appears to be as shown below. The nominal output impedance will be closer to 150Ω, this may have been chosen to provide some level of short circuit protection for the driver.

2088503-0
« Last Edit: March 30, 2024, 07:14:34 am by Dave_g8 »
 
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Offline Dave_g8

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #77 on: March 29, 2024, 10:05:46 am »
Interesting, there is a recent firmware upgrade for the DSO3D12 which adds a frequency meter and pulse counter.

This appears to be a similar specification to the feature found on the DSO154Pro (HW V1.4). The DSO3D12 seems to have a higher upper frequency limit.

It may be that the feature on the DSO154Pro is also HW/FW dependant, since this seems to be the case for the DSO3D12.

2088509-0

A thread describing the DSO154Pro frequency meter and counter is shown below.
https://www.eevblog.com/forum/testgear/new-toy()-scope-dso154pro-1ch-claimed-40mss/msg5418215/#msg5418215
« Last Edit: March 29, 2024, 10:12:15 am by Dave_g8 »
 
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Offline jarpo

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #78 on: April 04, 2024, 12:51:19 am »
Interesting, there is a recent firmware upgrade for the DSO3D12 which adds a frequency meter and pulse counter.

This appears to be a similar specification to the feature found on the DSO154Pro (HW V1.4). The DSO3D12 seems to have a higher upper frequency limit.

It may be that the feature on the DSO154Pro is also HW/FW dependant, since this seems to be the case for the DSO3D12.

(Attachment Link)

A thread describing the DSO154Pro frequency meter and counter is shown below.
https://www.eevblog.com/forum/testgear/new-toy()-scope-dso154pro-1ch-claimed-40mss/msg5418215/#msg5418215


Do you know if this new firmware is also available for hardware version V1.1 and firmware version v1.1.2? ZEEWEII appears to say that it has recently upgraded the DSO3D12 hardware, but does not provide any further information on its website.
 

Offline Dave_g8

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #79 on: April 04, 2024, 06:53:02 am »
Hi,
Sorry, I don’t have any further information. The screenshot in the previous message is from one of the files in the firmware download when you click the icon on the website.
Perhaps ask the question via the “contact us” page.

 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #80 on: April 22, 2024, 06:06:57 pm »
Do you know if this new firmware is also available for hardware version V1.1 and firmware version v1.1.2? ZEEWEII appears to say that it has recently upgraded the DSO3D12 hardware, but does not provide any further information on its website.

If your current FW version is 3.0.0_III or 3.0.1_III then you have the correct HW version for the new FW.
Bill  (Currently a Siglent fanboy)
--------------------------------------------------
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #81 on: April 27, 2024, 01:02:24 am »
I just discovered an undocumented feature on this little instrument.

If you go in into the FG via the "Gen" button, you are limited to 5MHz on sine wave, as per the specifications.  However if you go into the full-screen FG via the "Home"   menu (short press the power button) you can get the sine function at 10MHz!!  :-+ :-+

This is with the latest firmware.

I have also verified the new frequency counter is good from 15Hz to 35MHz - well beyond specification.
« Last Edit: April 30, 2024, 07:29:21 pm by BillyO »
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Offline wasedadoc

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #83 on: April 30, 2024, 09:13:34 pm »
I just discovered an undocumented feature on this little instrument.

If you go in into the FG via the "Gen" button, you are limited to 5MHz on sine wave, as per the specifications.  However if you go into the full-screen FG via the "Home"   menu (short press the power button) you can get the sine function at 10MHz!!  :-+ :-+

This is with the latest firmware.

I have also verified the new frequency counter is good from 15Hz to 35MHz - well beyond specification.
That undocumented feature is not confined to the latest firmware.  Also present in mine which does not have the frequency counter.
 

Offline big t

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How to check what is my current FW version?
 

Offline BillyO

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From their website which can be found with a simple google search for "Zeeweii" and two clicks of the mouse you get:

Quote
Check version: Menu->DMM,and then long press "V(ch1)" button.

 |O
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Offline Evi

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Did anybody perform successful FW upgrade
 

Offline Evi

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Successfully performed brick/unbrick sequence on v1.1.2 with the kind help from Zeeweii support. FW attached.
New Upgrade_Tools_V1.5.8
http://www.isme.fun/?log=blog&id=34
« Last Edit: May 22, 2024, 11:39:16 am by Evi »
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #88 on: June 06, 2024, 09:27:36 am »
Successfully performed brick/unbrick sequence on v1.1.2 with the kind help from Zeeweii support. FW attached.
New Upgrade_Tools_V1.5.8
http://www.isme.fun/?log=blog&id=34
Has anything changed after the firmware? And were there any pitfalls in the firmware? Thanks!
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #89 on: June 22, 2024, 06:29:49 pm »
Прошил dso3d12 3 версией ,получил кирпич.была версия 1.1.2 |O
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #90 on: June 22, 2024, 10:04:20 pm »
Прошил dso3d12 3 версией ,получил кирпич.была версия 1.1.2 |O
:palm:

The Zeeweii website says:
Quote
If your version is v3.0.0_III/v3.0.1_III, you can upgrade to v3.0.2_III stable version. And for older versions, this firmware is not compatible due to hardware differences.

That's pretty clear.  What were you expecting? :-//
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Offline Cricri

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #91 on: August 05, 2024, 09:59:30 pm »
Quote from: BillyO
That's pretty clear.  What were you expecting? :-//

I have the same problem and I think his expectation was the same as mine: ordered in 2024 and not too chuffed with being sent old stock model, especially when it locks us out of improved firmware updates. Ordered mine straight from Zeewei Taobao's shop so was defo not expecting old stock.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #92 on: August 05, 2024, 10:06:10 pm »
I have the same problem and I think his expectation was the same as mine: ordered in 2024 and not too chuffed with being sent old stock model, especially when it locks us out of improved firmware updates. Ordered mine straight from Zeewei Taobao's shop so was defo not expecting old stock.
When in 20204?  I know they were not available for a while as some vendors were out of stock.  Did you complain to them?  I have found them to be very responsive.
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Offline boreack

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #93 on: August 28, 2024, 07:15:52 pm »
Does anyone know what the "CH1_20M" function is for?
It appears in the last firmware "3.0.5-III" and seems to be a 20M bandwidth limit for the selected channel (It's in the same menu than F_Meter. Menu > x1x10 >x1x10) but I don't know why you like to limit the bandwidth.
Do you win something?

Greetings
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #94 on: August 28, 2024, 07:24:17 pm »
I don't know why you like to limit the bandwidth.
Do you win something?

No prizes.  There is no real requirements for it anymore and it's really just of historical significance.  A lot of products are still ( :-// ) only tested via 20MHz BW, like power supplies.  Back in the day (pre 1970s) engineers demanded that noise and ripple of PS units be checked against high BW for the time (20MHz).  Like a lot of engineering specs, it's hung around like an unwanted relative.  These days testing PS units to only 20MHz is just sweeping dirt under the rug.  IMO anyway.

Yeah, so it's there in nearly every scope for that (long past it's best before date) reason.
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #95 on: September 24, 2024, 05:29:35 am »
No prizes.  There is no real requirements for it anymore and it's really just of historical significance.  A lot of products are still ( :-// ) only tested via 20MHz BW, like power supplies.  Back in the day (pre 1970s) engineers demanded that noise and ripple of PS units be checked against high BW for the time (20MHz).  Like a lot of engineering specs, it's hung around like an unwanted relative.  These days testing PS units to only 20MHz is just sweeping dirt under the rug.  IMO anyway.

Yeah, so it's there in nearly every scope for that (long past it's best before date) reason.

It's for use when you're in 1x mode.




 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #96 on: September 24, 2024, 02:09:43 pm »
It's for use when you're in 1x mode.

For the life of me I cannot see how you took that leap from looking at that video.  The probe itself, in 1X mode, is going to limit your BW to well under 20MHz so why on earth would you need or want to engage 20MHz BW on your scope when using a probe in 1x mode?

Dude, ur jus' makin' stuff up!  :-DD

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #97 on: September 28, 2024, 08:01:03 am »
I was reading the manual and saw that the multimeter is easily calibratable.

Just input a known value and tweak the screen reading to match.

« Last Edit: September 28, 2024, 08:02:39 am by Fungus »
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #98 on: September 28, 2024, 03:00:01 pm »
Wow, I didn't know that.  Thanks.

Mine measures the same as my SDM3055 anyway but this is good to know.
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #99 on: September 28, 2024, 03:39:17 pm »
I think one of these is on my "new toy" waiting list now. It seems ideal for Arduino club.

For somebody on a budget that's just starting with nothing this is amazing value for money.

If you gave a kid one of these and some Arduino stuff you probably wouldn't see them for six months.
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #100 on: September 28, 2024, 03:59:07 pm »
For somebody on a budget that's just starting with nothing this is amazing value for money.

Yeah, I have to agree.  Very nice for the money.  Of course you have all the TE snobs that think anything less than a Keysight HD304MSO for their audio work is just rubbish.  :-//  :-DD
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #101 on: September 30, 2024, 02:34:55 am »
Here are a couple of shots of my "on the go" kit.  I found the case on AliExpress and it fits the foam that the DSO3D12 shipped in perfectly.  Great for tossing in the back of the car/truck/bike.

This little instrument is far more than a toy and performs somewhat better than the specs in the first post.  However, the author is not interested in input from me.   :-//

2387055-0

2387059-1
« Last Edit: September 30, 2024, 02:37:17 am by BillyO »
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #102 on: September 30, 2024, 03:17:56 am »
What's the battery life like?
 

Offline boreack

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #103 on: September 30, 2024, 12:45:29 pm »
Here are a couple of shots of my "on the go" kit.  I found the case on AliExpress and it fits the foam that the DSO3D12 shipped in perfectly.  Great for tossing in the back of the car/truck/bike.
[...]

Did you have link for the case? I need something similar.

Greetings.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #104 on: September 30, 2024, 01:42:54 pm »
What's the battery life like?
I really don't know.  I use it frequently but have only charged it up 2 times in 5 months.  Several hours for sure.
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #105 on: September 30, 2024, 01:47:28 pm »

Did you have link for the case? I need something similar.

Greetings.

It is the medium size one Here.
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #106 on: September 30, 2024, 05:24:14 pm »
Did you have link for the case? I need something similar.

They sell those in every size and color imaginable on Aliexpress.

I'm sure you could get something smaller if you trim the foam as shown.

 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #107 on: September 30, 2024, 05:26:26 pm »
What's the battery life like?
Several hours for sure.

OK, that's good!

It looks like it would take a bigger battery inside but "several hours" is good enough.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #108 on: September 30, 2024, 05:30:51 pm »
I've got one in my cart on Aliexpress but I'm waiting because there's a sale that starts in 4 days and they'll be 10% cheaper then.

(about 83 Euros shipped)
 

Offline waltermixxx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #109 on: September 30, 2024, 05:58:55 pm »

I just purchased one from Amazon and it arrived today, and when I check the firmware,  Menu, Set (DMM) and long press CH1 V,  it displays "V.1.1.1" only in white text.  Nothing else, it does not say "v3.0.0_III"  so does that mean I'm out of luck as far as updates are concerned?  I downloaded the update from the site and there is a "dso3d12_v1.1.2-old_version.fls" and the later "dso3d12_v3.0.5_III.fls" file.  I'm kinda stuck as to if I can upgrade to at least 1.1.2 ?  just wondering what my best options are. :)

Cheers. :)
 

Offline wasedadoc

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #110 on: September 30, 2024, 06:42:44 pm »

I just purchased one from Amazon and it arrived today, and when I check the firmware,  Menu, Set (DMM) and long press CH1 V,  it displays "V.1.1.1" only in white text.  Nothing else, it does not say "v3.0.0_III"  so does that mean I'm out of luck as far as updates are concerned?  I downloaded the update from the site and there is a "dso3d12_v1.1.2-old_version.fls" and the later "dso3d12_v3.0.5_III.fls" file.  I'm kinda stuck as to if I can upgrade to at least 1.1.2 ?  just wondering what my best options are. :)

Cheers. :)
You either keep it or return to Amazon and hope you gat a more recent one from Aliexpress.
 

Offline wasedadoc

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #111 on: September 30, 2024, 06:45:01 pm »
Did you have link for the case? I need something similar.

They sell those in every size and color imaginable on Aliexpress.

I'm sure you could get something smaller if you trim the foam as shown.


But getting the test leads and probes in the case would be more important to me than the smaller size for the scope only.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #112 on: September 30, 2024, 10:03:52 pm »

I just purchased one from Amazon and it arrived today, and when I check the firmware,  Menu, Set (DMM) and long press CH1 V,  it displays "V.1.1.1" only in white text.  Nothing else, it does not say "v3.0.0_III"  so does that mean I'm out of luck as far as updates are concerned?  I downloaded the update from the site and there is a "dso3d12_v1.1.2-old_version.fls" and the later "dso3d12_v3.0.5_III.fls" file.  I'm kinda stuck as to if I can upgrade to at least 1.1.2 ?  just wondering what my best options are. :)

Cheers. :)
I would return it to Amazon and buy it directly from the Zeeweii store on AliExpress.  They have been shipping the V3 firmware since April (when I got mine).
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #113 on: October 01, 2024, 05:54:29 am »
I would return it to Amazon and buy it directly from the Zeeweii store on AliExpress.  They have been shipping the V3 firmware since April (when I got mine).

Now you got me worried about the cheaper ones on Aliexpress...

 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #114 on: October 01, 2024, 01:50:18 pm »
Now you got me worried about the cheaper ones on Aliexpress...

I got mine HERE.  But I can see they have increaed the price since I got mine.  I paid $120CDN, bt now it's listed at $135CDN!
« Last Edit: October 01, 2024, 01:55:02 pm by BillyO »
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #115 on: October 02, 2024, 08:15:51 pm »
OK, mine's on the way.

In the end I went for the official store even though it's a bit more expensive.

"9 day delivery".

 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #116 on: October 09, 2024, 03:48:13 pm »
It arrived!

First impressions: Very good!

Firmware version is 3.0.5 III

(purchased from Zeeweii official store)
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #117 on: October 09, 2024, 09:39:52 pm »
OK, I've been playing with it some more.

It's very easy to use and navigate compared to the little Zeeweii.

The multimeter is bang-on in all ranges.  :)

Oscilloscope works fine.

Edit: Removed comment about "phase" - that was a PEBKAC - my siggen wasn't syncing the channels..
« Last Edit: October 09, 2024, 10:11:13 pm by Fungus »
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #118 on: October 09, 2024, 09:54:17 pm »
I found a more up to date manual with the voice commands, etc.

https://supereyes.ru/img/instructions/zeeweii_dso3d12_manual.pdf
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #119 on: October 09, 2024, 10:12:49 pm »
OK, I've been playing with it some more.

It's very easy to use and navigate compared to the little Zeeweii.

The multimeter is bang-on in all ranges.  :)

To the part you edited out, if you put in 2,777.78 Hz you can use the cursors to determine the phase shift.  Each us (microsecond) will be 1 degree.

 I have not noticed this, but then again I have not used in the dual trace mode since upgrading the firmware.
« Last Edit: October 09, 2024, 10:22:59 pm by BillyO »
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #120 on: October 09, 2024, 10:17:22 pm »
I found a more up to date manual with the voice commands, etc.

https://supereyes.ru/img/instructions/zeeweii_dso3d12_manual.pdf
I haven't found much use for the voice commands except to impress people that know nothing about electronics - "the wizard's new toy"

However, it does foreshadow a day when we buy a new scope and it will be able to connect to ChatGPT v21.5  Then we just hook up something like a capacitor and ask "is this capacitor going to be any good for {such and such}?"
« Last Edit: October 09, 2024, 10:22:16 pm by BillyO »
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #121 on: October 09, 2024, 10:25:29 pm »
I have not noticed this, but then again I have not used in the dual trace mode since upgrading the firmware.

That was a PEBKAC, my SIGGEN didn't have channel sync enabled.  :palm:
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #122 on: October 09, 2024, 10:27:57 pm »
That was a PEBKAC, my SIGGEN didn't have channel sync enabled.  :palm:
Ahh..   :-X
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #123 on: October 09, 2024, 10:32:57 pm »
Conclusions:

This is an awesome little gadget for the money. I'd have no problem recommending it for kids starting out at Arduino club.

The only annoying thing I've noticed is that it doesn't let you use the multimeter when USB is connected. This means you can't leave it plugged in all day as a bench DMM.  >:(

I don't know if there's a hack for this. Did previous firmwares prevent it?
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #124 on: October 09, 2024, 10:38:16 pm »
Did previous firmwares prevent it?
Well, the previous two did.

I think it needs the serial channel to communicate with the ADC.  They should be able to allow the 5V through.  Maybe add a small socket to it.
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #125 on: October 09, 2024, 10:43:15 pm »
Did previous firmwares prevent it?
Well, the previous two did.

I think it needs the serial channel to communicate with the ADC.  They should be able to allow the 5V through.  Maybe add a small socket to it.

I'm powering it off a phone charger so there's no data right now.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #126 on: October 09, 2024, 11:08:59 pm »
I'm powering it off a phone charger so there's no data right now.
I tried that too.  I think it just senses the power source and keys off that.
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #127 on: October 10, 2024, 01:22:03 pm »
I just did a basic battery life test.

It arrived with 50% charge (nice) so I gave it a full charge.

When the charge light went green I powered it on and left it displaying a sine wave from its own signal generator.

The battery indicator started flashing after ~7 hours and it powered off ~30 minutes later.

Not bad!
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #128 on: October 10, 2024, 05:49:12 pm »
Yup.  You can basically get a full day's work out of it.  More than you can say for a lot of people.
Bill  (Currently a Siglent fanboy)
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #129 on: October 10, 2024, 06:04:57 pm »
Yup.  You can basically get a full day's work out of it.

The battery's easy to replace, too, if it starts to lose capacity.

You could probably get a bigger one in there, maybe a 3200mAh 506090 and go for ten hours run time...?
« Last Edit: October 10, 2024, 06:13:32 pm by Fungus »
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #130 on: October 10, 2024, 10:34:07 pm »
The voice control cracks me up!  :-DD
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #131 on: October 10, 2024, 10:36:59 pm »
The voice control cracks me up!  :-DD

Yeah, I had it on one day when my son dropped by and it got real involved in the conversation!  :scared:
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Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #132 on: October 17, 2024, 01:54:34 am »
Voice control is good. I'm looking at the waveforms on the bike. I want to see the pulse width. The pulse period is displayed instead of the pulse width. I checked with the retailer and they told me it was the pulse cycle.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #133 on: October 17, 2024, 02:03:14 am »
It looks like you have your trigger set for rising edge.  You need to set it to falling edge.

Tip: When you take a picture of the screen make sure .. 1) the center of the camera lens is directly in front of the center of the screen, and .. 2) you include the ALL the information on the screen like in the 4th picture.
Bill  (Currently a Siglent fanboy)
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Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #134 on: October 17, 2024, 02:14:04 am »
Thanks for the advice, I appreciate it

There is no photo, but the pulse period is displayed even when the trigger is set to the falling edge.
The fourth photo is the cursor measurement.

I want to measure the pulse width in automatic measurement mode. 

This photo shows the waveform on a different oscilloscope, but the pulse width is displayed using automatic measurement.  

I checked with the dealer and they said that DSO3D12 displays the HALS cycle.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #135 on: October 17, 2024, 04:08:46 am »
I don't know who is telling you what, nor do I know what a KMOON is, but look at the picture below.

A negative going pulse, measuring T-, with trigger set to falling edge.

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Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #136 on: October 17, 2024, 08:03:09 am »
I don't know who is telling you what, nor do I know what a KMOON is, but look at the picture below.

I know what a KKMOON DS0120M is, but...


I checked with the dealer and they said that DSO3D12 displays the HALS cycle.

... what is a HALS cycle?
 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #137 on: October 18, 2024, 02:37:33 am »
 この画面はカーソル測定で表示されました。 
トリガーが下降エッジに設定された、T- を測定する負方向のパルスです。
ここはパルス幅で測定されている
 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #138 on: October 18, 2024, 02:43:34 am »
HALS サイクルはタイプミス。
ごめんなさい

正しくはパルス周期

パルス周期がDSO3D12で表示される
また、一画面に一パルスでは自動測定モード
では表示されない
 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #139 on: October 18, 2024, 02:53:04 am »
I was told that the pulse width cannot be measured.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #140 on: October 18, 2024, 02:54:26 am »
この画面はカーソル測定で表示されました。 
トリガーが下降エッジに設定された、T- を測定する負方向のパルスです。
ここはパルス幅で測定されている


Translation:
This screen was displayed with cursor measurement. 
It is a negative going pulse that measures T- with the trigger set on the falling edge.
This is measured by pulse width

My Japanese might be a bit rusty, but if you take a better look at the screen I presented you will see both the auto and the cursor agree.  In you measurement the trigger voltage was not set low enough and was set in an area where there could be confusion caused by noise and ringing.  The scope is quite capable of doing what you want.

Please post in english.  If you have problems expressing yourself in English use Google translate.  The Japanese to English translation is quite good.
Bill  (Currently a Siglent fanboy)
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #141 on: October 18, 2024, 02:55:46 am »
I was told that the pulse width cannot be measured.
Well, it can.  I showed it can.  Not sure what that correspondence is about.

It can even measure duty cycle (+ or -).
« Last Edit: October 18, 2024, 03:00:42 am by BillyO »
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Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #142 on: October 18, 2024, 04:52:45 am »
 thank you so much
"The trigger voltage is not set low enough." Thanks for this tip。

Try lowering the trigger voltage.

tnks
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #143 on: October 18, 2024, 06:30:14 am »
I was told that the pulse width cannot be measured.

Not true.

Here's mine showing duty cycle and high/low time on a pulse wave:

 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #144 on: October 21, 2024, 04:29:10 am »
Thanks for any advice
T-352ms is understandable . It's the width of the lower recess. 

In my settings, it will be the width of the red arrow.
The display shows T-80.0ms. It should be around 18 ms?

Furthermore, data is not displayed in one waveform per screen mode.

I'm a beginner, thanks for any advice

アドバイスをありがとう
T-352msは理解できます。下側凹部分の幅ですよね
私の設定では赤矢印の幅になってしまいます
T-80.0msの表示です 本来は18msぐらい?

さらに1画面1波形ではデータが表示されません
 私は初心者です、アドバイスをありがとう


 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #145 on: October 21, 2024, 04:40:02 am »
The waveform I want is something like this:
T-21.6ms display is good
The second photo is also T-22.0ms, very good

I would like to check the waveforms of motorcycle injection and ISCV.





私が希望する波形はこんな感じです
T-21.6ms表示は良いです

2枚目の写真もT-22.0ms とても良いです
バイクのインジェクションゃ゜ISCVの波形を診たいです
« Last Edit: October 21, 2024, 05:03:25 am by motoge »
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #146 on: October 21, 2024, 06:07:14 am »
Looks like the 'scope is seeing this:



Which is reasonable.

So you can't measure that signal (which isn't a pulse wave) without using cursors.
 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #147 on: October 22, 2024, 01:59:11 am »
Thanks for the advice
We have now requested ZEEWEII to ensure that the pulse width measurement and screenshot numbers do not overlap with the cursor geodetic.






アドバイスありがとう
現在ZEEWEIIにパルス幅の測定とスクリーンショットの
番号がカーソル測地に重複しないよう要請しました。
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #148 on: October 30, 2024, 02:33:23 am »
Thanks for any advice
T-352ms is understandable . It's the width of the lower recess. 

In my settings, it will be the width of the red arrow.
The display shows T-80.0ms. It should be around 18 ms?

Furthermore, data is not displayed in one waveform per screen mode.

I'm a beginner, thanks for any advice

アドバイスをありがとう
T-352msは理解できます。下側凹部分の幅ですよね
私の設定では赤矢印の幅になってしまいます
T-80.0msの表示です 本来は18msぐらい?

さらに1画面1波形ではデータが表示されません
 私は初心者です、アドバイスをありがとう
I see what you are saying.  That's a 3 level signal so it may be confusing the software, but you are right.  The T- should be ~18ms instead of the entire signal period.
Bill  (Currently a Siglent fanboy)
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Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #149 on: October 30, 2024, 02:59:50 am »
 
Thank you for your understanding. 
I have now asked Zeeweii to fix DSO3D12.
I look forward to the next firmware update.
I would be happy if it turned out like this picture


色々理解していただいてありがとう
現在Zeeweii にDSO3D12の修正?を依頼しました
次回のファームUPに期待します
この写真の様になると嬉しいです
 「T-: 21.6ms」




 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #150 on: October 30, 2024, 03:04:12 am »
Have you tried setting the horizontal time base on the DSO3D12 to 5ms/div?

Also, how is the KMOON set up?

Is the coupling AC or DC?
What about the trigger - AC or DC?
« Last Edit: October 30, 2024, 03:06:39 am by BillyO »
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Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #151 on: October 30, 2024, 05:27:59 am »
  Any advice would be appreciated
It's from an old photo.
I measured at 500μS but the data is not displayed.
It seems that the manufacturer is aware of the problem with the pulse width measurement.


500μs.JPG is  DSO3D12    AC???

T - 22.0ms.JPG  is DSO120M DC?


アドバイスありがとうございます
過去の写真からです
500μSで測定しましたがデーター表示されません
パルス幅測定の不具合はメーカーも把握している感じです
 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #152 on: October 30, 2024, 05:39:05 am »
The current version of DSO3D12 is V3.05.
I look forward to the next firmware



現在DSO3D12のバージョンはV3.05です
次回ファームウェアに期待します。
« Last Edit: October 30, 2024, 06:04:50 am by motoge »
 

Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #153 on: November 07, 2024, 10:25:45 pm »
I think one of these is on my "new toy" waiting list now. It seems ideal for Arduino club.

For somebody on a budget that's just starting with nothing this is amazing value for money.

If you gave a kid one of these and some Arduino stuff you probably wouldn't see them for six months.

Forbeing a newbee from the not arduino but similar stuff club, that just recieved his aneng/zoyt zt703 scopemeter and has already decided to ship it back.
Is there any argument I should not buy this, when looking for a fairly function budget (2-channel) scope?

or any other suggestions?

Kind greatz

Matthieu
« Last Edit: November 07, 2024, 10:58:17 pm by spikey1973 »
 

Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #154 on: November 14, 2024, 09:24:40 pm »
A quick question: does the (newest) firmware DSO3D12 support 100X probes? or only 1x and 10x?

Kind greats

Matthieu.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #155 on: November 14, 2024, 09:26:45 pm »
100x probe is supported.
⚡ To avoid electric shock, ensure that your instrument is correctly grounded.
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #156 on: November 14, 2024, 10:01:33 pm »
As cte said, 100X probes are supported.
Bill  (Currently a Siglent fanboy)
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Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #157 on: November 14, 2024, 11:45:33 pm »
Ah thank you all, that is great to hear :)
 

Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #158 on: November 16, 2024, 12:29:58 am »
Hi! What function does the key combination shift + V(ch2) activate? The beam becomes thinner and changes color to blue-green.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #159 on: November 16, 2024, 12:42:22 am »
Hi! What function does the key combination shift + V(ch2) activate? The beam becomes thinner and changes color to blue-green.
It does nothing on mine.  What firmware version are you on?
Bill  (Currently a Siglent fanboy)
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #160 on: November 16, 2024, 12:52:34 am »
v3.0.5_III
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #161 on: November 16, 2024, 12:54:15 am »
Hmm, same here but I get nothing with the key combination.
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #162 on: November 16, 2024, 01:09:15 am »
Forbeing a newbee from the not arduino but similar stuff club, that just recieved his aneng/zoyt zt703 scopemeter and has already decided to ship it back.
Is there any argument I should not buy this, when looking for a fairly function budget (2-channel) scope?

I can't think of one.

The only "issue" is the aliasing when you go above the limits but that's an issue with all these 'scopes. Aliasing isn't a design flaw, it's inherent in the math.

(Desktop 'scopes also alias but you have to try harder to see it, I can get my 200MHz 'scope to alias on the 1kHz probe compensation signal if I mess with the settings badly enough)

The 'scope on this Zeeweii is a lot easier to use than others I've tried simply because it has more buttons for all the functions.

I'm really thinking of the whole package though - this is a 'scope with a decent multimeter and a signal generator.

Just don't use it on industrial power installations.
 

Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #163 on: November 16, 2024, 01:10:27 am »
Got it a bit figured out. It looks like a color display of frequencies. Probably an experimental function. Too bad I don't have the ability to send a signal with amplitude modulation.
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #164 on: November 16, 2024, 09:13:40 am »
Got it a bit figured out. It looks like a color display of frequencies. Probably an experimental function. Too bad I don't have the ability to send a signal with amplitude modulation.

This looks like some kind of persistence mode / phosphor emulation to me. But it's not the same as the persistence mode found in the menu (in fact, enabling both just seems to blank the signal on screen).

[Update]: Quick video demonstration added

« Last Edit: November 16, 2024, 09:38:46 am by cte »
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #165 on: November 16, 2024, 09:52:57 am »
Interesting. Looks like some sort of a heat map mode.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #166 on: November 16, 2024, 02:48:24 pm »
Okay, I was pressing shift and the V(ch2) key at the same time, not in sequence.  Now that I see that video It works on mine too.
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Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #167 on: November 17, 2024, 12:56:24 am »
Hmmm so interesting all this functions that are not in the Manual, keeps us digging for more hidden gems. Well i say us, its not like I found anything functional. But i did find something that I can't seem to get rid off.

I recieved my DSO3D12 today, and ofcourse I went out to play with it as any kid would do. But now a red line appeared in the middle of my screen. I believe it appeared when I was trying out functions, but the yellow Ch1 line covers it up most of the time. So i am not sure what i exactly did for this to appear.or when. I so feel like my mum playing with her phone. Stuff happening out of nowhere and not knowing how to get rid of it. Will being 80+ like this? Having absolutely no idea how to use the home teleportation device and still trying to walk to the supermarket?

Anyway. It seems like something 'signally' as there is some 'static' appearance. Like with Ch1 and Ch2. Btw my channel two is blue so, so it's not just a new hidden colour.

Anyway doesn anyone have any idea what i did, to get that too appear? Or whas it there all the time and did i just not notice?

Anyway. I would love some help on the topic.

Kind greats
Matthieu
 
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Offline black6host

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #168 on: November 17, 2024, 01:00:43 am »
@Matthieu

There is a way to take a screenshot of the current signal and then freeze it and display it, in red, as well as what the scope is displaying in real time.  I believe this is what you have done.  I've not got mine yet, due in a week or so, so I can't give you the exact steps to undo what you've done.  Sorry.
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #169 on: November 17, 2024, 01:05:24 am »
Anyway doesn anyone have any idea what i did, to get that too appear? Or whas it there all the time and did i just not notice?

I'm pretty sure you have enabled FFT in linear mode.  Go to the menu and go to settings.  On the 2nd last line you should see the yellow square on "Lin".  Move the cursor to "OFF" on the same line and press "OK".  The red line should now be gone.

Either that or you did what balck6host said.
« Last Edit: November 17, 2024, 01:07:06 am by BillyO »
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #170 on: November 17, 2024, 02:52:29 am »

Anyway doesn anyone have any idea what i did, to get that too appear?


Kind greats
Matthieu
press shift, and after press Single(Ref)
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #171 on: November 17, 2024, 02:54:56 am »
press shift, and after press Single(Ref)

Yup, that's it!  Do the same thing again and it goes away.
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #172 on: November 17, 2024, 06:34:26 am »
Anyway doesn anyone have any idea what i did, to get that too appear? Or whas it there all the time and did i just not notice?


Did you try putting in a signal on channel 1?
 

Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #173 on: November 17, 2024, 11:16:37 am »
@all, thanks for your replies!
oddly enough, it has disappeared when I just now turned it on to see how to turn it off. so the mistory remains for now, but all thoughts sound as valid options so.
that beside me knowing that it wasn't a lin FFT, I looked at that before and know I left it in off mode.

@Blackhost, _RUS73_ and BillyO
yeah that is it indeed :D, allthough It disappeared, this got it "back", and removed it again.
So blackhost, these are the steps ;), wishing you lot of fun with your new machine when it arrives.

@Fungus, yeah I did. only a signal from the generator for now but, yeah I did put an signal on ch1 (and 2)

Additional question:

Has anyone made a sort of reference list of the "not in manual, but still present functions for now?
seems like an interesting thing to me, so people don't figure things out by accident and then let the information evaporate into oblivion.
I am trying to make a list here for myself, but am very will to post it when done.

for now I have the following items: but please add if I missed something.
- Voice control (although this is discussable, as there is a manual with it in it)
- Shift + V/ch2 → persistend mode /phosphor emulation.
- enter FG via the "Gen" button, sine wave is limited to 5MHz, full-screen FG via the "Home" menu (short press the power button) the sine functions at 10MHz
- new frequency counter is good from 15Hz to 35MHz - well beyond specification.

I am also interested in this mod: but would I be assuming wrongly if I assume an BNC connector is also a viable option?

I fitted a SMA connector to the side of the back cover, for the sig.gen output.
Works much better then the 2 prongs on the top. Also made sure it does not interfere with anything on the inside.
The SMA connector is designed for at least 12GHz and  50 Ω impedance, so should be OK for this application.
Yes, it should have been a female connector, but I only had a male around. :palm:  ;)

@Jdev99, did I see correctly that you connect an coaxial directly to the soldertabs on the inside? nothing more then that?
besides ofcourse making sure all is neatly insulated?

@Billy_O
https://nl.aliexpress.com/item/1005007075516670.html?spm=a2g0o.order_list.order_list_main.35.71fe79d24tDpkM&gatewayAdapt=glo2nld

I have ordered one of these, slightly larger so I can store my scope and the probes savely and nothing is lying around messy like it has been.

You could probably get a bigger one in there, maybe a 3200mAh 506090 and go for ten hours run time...?

Also ordered a 4000mAh 606090, should fit in there nicely, a lot more run time.


Kind greats

Matthieu
« Last Edit: November 17, 2024, 02:47:58 pm by spikey1973 »
 
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Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #174 on: November 17, 2024, 08:14:32 pm »
Whoohoo, Just made my first real measurement, kinda the reason why I wanted this.
Recording a signal from a single hit on a piezo disk :D

A shame one can't download the images really.

one last question:

after a image is saved, is it still possible to zoom in? use the cursorlines. Is the original signal maintained?
or is it nothing more then a screenshot in like a picture form? without any possible form of manipulation?

Kind greats.

PS: I know it's not possible to "download" the image.
« Last Edit: November 17, 2024, 08:43:20 pm by spikey1973 »
 

Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #175 on: November 17, 2024, 10:49:08 pm »
It's just a screenshot.
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #176 on: November 19, 2024, 06:50:52 pm »
Hi folks,

Thanks to the great info here and in the DSO2512G thread, I picked up a DSO3D12 from the Zeeweii official Aliexpress storefront during the 11.11 sale. It arrived with firmware 3.0.6-III:



The support site still shows 3.0.5-III. Any ideas on the updates in this firmware or functionalities to test? I've requested info about this firmware from Zeeweii in case there are notes available.

-Nikhil
« Last Edit: November 20, 2024, 02:13:24 pm by taligentx »
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #177 on: November 19, 2024, 06:57:45 pm »
Hmm, I wish I knew about it.  I have requested a copy from Zeeweii.
Bill  (Currently a Siglent fanboy)
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Offline beenai2018

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #178 on: November 19, 2024, 10:22:39 pm »
Anyone here have non Zeeweii branded unit ? Im seeing "Zeeweii company store" ,"zeeweii official store" ,"kkmoon store" etc. selling the same item on Aliexpress..

Curious to know if they are all selling the same unit or  changing firmware etc. There is minor chatter about that in the thread but nothing to sway me either way ..
 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #179 on: November 20, 2024, 02:01:30 am »
Thanks for the article post.
Mine is version V3.05.
The current problem is
The bandwidth in the automatic measurement mode is the period of the band.
and


Taking a screenshot while displaying cursor measurements results in overlapping displays.

How about version V3.06?


« Last Edit: November 20, 2024, 05:19:58 am by motoge »
 

Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #180 on: November 20, 2024, 02:13:01 pm »
@Fungus: thanks, good to know..
@taligentx: thanks for telling us, I didn't check mine and I ordered it at the same shop, same time and indeed mine is 3.0.6-III to.
I connected it to my laptop, but I did not see a drive available, would love to see if I could download the screenshot images, but if no dribe is visible...

Am very interested in the reply from Zeeweeii when you get it.

@motoge: I hope this version solves your issues too!

Kind greats

Matthieu
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #181 on: November 20, 2024, 03:45:15 pm »
Taking a screenshot while displaying cursor measurements results in overlapping displays.

Hi @motoge - if you mean the screenshot sequence number, yes, it still displays in the upper left corner of the screenshot and obscures that part of the image:


The bandwidth in the automatic measurement mode is the period of the band.

Do you have a test sequence for this issue that can use the built-in signal generator?
 
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #182 on: November 20, 2024, 09:43:16 pm »

I measured at 500μS but the data is not displayed.

To correctly display all signal parameters, at least a couple of full signal periods must be displayed on the screen.
 
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Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #183 on: November 20, 2024, 11:07:58 pm »
That's right. The display overlaps.
The internal transmitter is the only option I have.
 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #184 on: November 20, 2024, 11:12:03 pm »
The same waveform was displayed on other oscilloscopes.

Measurement was possible with just one waveform
In the case of DSO120M
« Last Edit: November 20, 2024, 11:15:59 pm by motoge »
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #185 on: November 21, 2024, 02:55:48 am »
Anyone here have non Zeeweii branded unit ? Im seeing "Zeeweii company store" ,"zeeweii official store"
These two are the Zeeweii stores.  I've no idea why they have two, but they did confirm to me that both of these are actaully Zeeweii.  They also confirmed that many other stores sell their products.
Bill  (Currently a Siglent fanboy)
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Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #186 on: November 22, 2024, 04:56:53 pm »
it's fairly easy to confirm if "2 or more" stores are actually the same on AE.
under the store name there is a "link" to store-information -> company license:
here you can find the tax-number. if they are the same they are the same store.

IMHO they make more than one store for one or more of the following reasons:
* one is a choice store, the other isn't
* posibility to make different offerings for the same item
* being "visually" more present compared to the competition, specifically interesting when searhing for one specific item.

so when searching for a zoyt 703, you get 2-3-4 or more ads, all the one stores.
The smaller stores will have just one add, mostly not a choice, maybe even lower price but with shiping costs, having no store name, but a number (guess the names are expensive),

this all ofcourse to draw us customers in.

kind greats

Matthieu

 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #187 on: November 22, 2024, 06:11:05 pm »
Some companies like Zeeweii or FNIRSI do not use choice, but their free shipping is very fast.  Never had an issue with either.
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #188 on: November 23, 2024, 12:21:20 am »

Has anyone tested the generator with a reference meander signal?

Watching amateurs' tests on YouTube, it is clear that the generators do not produce a reference signal at all. These are screenshots of the results from several videos.

I have a smd txco generator for 26 megahertz. I assembled it with a 3.3v supply and decoupled the output with a 10pf capacitor. But its signal does not even remotely resemble a square wave.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #189 on: November 23, 2024, 01:32:07 am »
I don't quite understand what you want to know.

The JDS6600 60MHz - the 60MHz is for sine wave only and the square wave is only specified to be useful to 10MHz.  However, that screen shot you show does NOT look like any JDS6600 I know of.  Maybe they really are amateurs of the worst kind.

Here is my DSO3D12 with my JDS6600 (60MHz) @ 10MHz, 20MHz and 24MHz.  (sorry, had probe set to 10X and the focus is lousy)

And I get pretty much exactly the same with my Siglent SDS2504 scope, so it's no the ZEEWEII, is the the JDS6600.
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #190 on: November 23, 2024, 05:28:33 am »
Hmm... That's weird. Your signal is very suppressed. Are you sure the probe is in the 10x position because it doesn't look like it at all. Can you repeat the measurements?

.
« Last Edit: November 23, 2024, 06:11:30 am by _RUS73_ »
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #191 on: November 23, 2024, 06:06:37 am »
Obviously the scope is set to 10x.  This only changes the vertical scaling.

I did not use a probe.  The measurements were made using a 50Ω coax from the FG to the scope through a 50Ω passthrough terminator at the scope end.  This is the correct way to do it.  I'm not sure how the "amateurs" you looked at on YT did it, but I'm almost 100% sure they did it incorrectly just from viewing your screen shots. 

The signal is not suppressed.   That is what the JDS6600 produces.  Again, as I said, the waveform is essentially the same viewed on my 500MHz Siglent scope.

In what way, exactly, would you like me to repeat the measurements?
« Last Edit: November 23, 2024, 06:14:12 am by BillyO »
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #192 on: November 23, 2024, 06:24:05 am »
(50Ω passthrough terminator) do you mean 50 ohm balanced load(RF) for the generator?
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #193 on: November 23, 2024, 06:37:59 am »
(50Ω passthrough terminator) do you mean 50 ohm balanced load(RF) for the generator?

The JDS6600 has an output impedance of 50Ω.  When you connect it via a 50Ω coax cable to an oscilloscope that has a high impedance input you need to terminate the cable at the scope end with a 50Ω load.  This is is normally done with a 50Ω passthrough or feed-through terminator.  Google it.

See the one I used below.  And have a look at this video: https://youtu.be/W_Jy_sdpv9Y

« Last Edit: November 23, 2024, 06:49:32 am by BillyO »
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #194 on: November 23, 2024, 07:35:42 am »
I think your measurement technique is correct. But there is a nuance with the signal generator. It cannot generate the correct signal shape if there is not only an active load of 50 Ohm, but also a reactive load in the form of cable capacitance and oscilloscope input capacitance. This can be easily verified by using an oscilloscope probe in the 10x position in this chain. Try adding another oscilloscope probe when measuring.

 

Offline wasedadoc

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #195 on: November 23, 2024, 10:45:57 am »
@_RUS73_

You seem confused:

1.  "an active load of 50 Ohm". Why have you written "active"?

2.  "50 ohm balanced load(RF)". Why have you written "balanced"?  Neither the generator output nor the scope input is balanced.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #196 on: November 23, 2024, 02:51:54 pm »
I think your measurement technique is correct. But there is a nuance with the signal generator. It cannot generate the correct signal shape if there is not only an active load of 50 Ohm, but also a reactive load in the form of cable capacitance and oscilloscope input capacitance. This can be easily verified by using an oscilloscope probe in the 10x position in this chain. Try adding another oscilloscope probe when measuring.
The coax cable is a transmission line with a characteristic impedance of 50Ω.  For it to do it's job properly, it must be fed a signal from a 50Ω source and it must deliver it into a 50Ω termination or the signal will get distorted by reflections.  google "transmission line theory" and read at least the Wikipedia article on the subject: https://en.wikipedia.org/wiki/Transmission_line

Right now I have an injured knee so moving around up and down to the basement lab is difficult for me.  If I can, I will do as you ask but do not expect it soon.  The signal I showed you is correct.
« Last Edit: November 23, 2024, 02:58:25 pm by BillyO »
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #197 on: November 24, 2024, 12:19:11 am »
@_RUS73_

You seem confused:

1.  "an active load of 50 Ohm". Why have you written "active"?

2.  "50 ohm balanced load(RF)". Why have you written "balanced"?  Neither the generator output nor the scope input is balanced.
These are the difficulties of communication and understanding the essence through Google Translate:)

Now let's get to the point, and what I wanted to convey.

I got hold of a similar signal generator. The test results showed that connecting the generator via a 50 Ohm cable to the oscilloscope via a 50 Ohm pass-through load terminal to the bnc connector of the oscilloscope distorts the signal (apparently the additional capacitance of the oscilloscope input overloads the generator output). Before connecting the oscilloscope, the signal has a more correct shape. This can be easily verified by connecting a probe with a 10x divider to the circuit. The signal has a more regular shape.

Several rules for conducting their measurements are violated here:
1. The oscilloscope must introduce minimal distortion into the measured circuit.
2. The generator must have sufficient load capacity and produce the correct signal to conduct such measurements.

In this particular case, we can only correct the first point, using the probe in the 10x position to minimize the effect on the signal.

I consider the testing conducted by user BillyO to be unsuccessful due to the impossibility of observing point 2.
« Last Edit: November 24, 2024, 12:22:19 am by _RUS73_ »
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #198 on: November 24, 2024, 01:20:47 am »
2. The generator must have sufficient load capacity and produce the correct signal to conduct such measurements.

..

I consider the testing conducted by user BillyO to be unsuccessful due to the impossibility of observing point 2.
?  How would you observe this?

The JDS6600 has a 50Ω output.  It's right in the specifications.

You can consider whatever you like.  I tested it properly.  Again, read up about signal transmission lines and get your facts straight - please.  The SG sees 50Ω when it drives a correctly terminated 50Ω coax cable and the JDS6600 was designed specifically to do that.  it WILL NOT see the few pF (maybe 40-50pF) of the scope when connected in this fashion.  Where did you dig up this rubbish?
« Last Edit: November 24, 2024, 01:23:52 am by BillyO »
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Offline _RUS73_

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #199 on: November 24, 2024, 02:26:38 am »
If you think the added capacitance is small enough to distort the signal, repeat the test with the probe first at 1x, then at 10x.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #200 on: November 24, 2024, 03:08:58 pm »
If you think the added capacitance is small enough to distort the signal, repeat the test with the probe first at 1x, then at 10x.
Listen, go learn about transmission lines.  The generator WILL NOT see the scope capacitance at the other end of a properly terminated coax cable. 

My Siglent SDS2504X-P has an input capacitance of 17pF.  That's less than a cheap 100MHz probe set on 10X.  Set on 1X that would be more like 100pF.  You're talking utter nonsense.  I wouldn't be surprised if you thought the earth was flat too.

And I already told you, I'm injured.  Getting up and down the stairs is a big problem for me and I'm not going to do it right now for your sake.  I know exactly what I'll see.
« Last Edit: November 24, 2024, 03:17:41 pm by BillyO »
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Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #201 on: November 26, 2024, 12:02:42 am »
In addition to trying to 'collect' functions that are not in the manual I bumped into the event counters and Freq counter under menu > disp (x1x10) > disp (x1x10).

But besides these two there is on mine also something called 20m for both Ch1 and Ch2. After activating it, it doesn't seem to do much more the showing 20m somewhere on the right side. Does anybody have any clue what this is all about?

Kind greatz

Matthieu.
« Last Edit: December 04, 2024, 11:12:33 am by spikey1973 »
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #202 on: November 26, 2024, 12:23:00 am »
Does anybody have any clue what this is all about?

20MHz bandwidth limit.
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Offline wilfred

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #203 on: November 26, 2024, 05:38:47 am »
In addition to trying to 'collect' functions that are not in the manual I bumped into the event counters and Freq counter under menu > dev > dev.

But besides these two there is on mine also something called 20m for both Ch1 and Ch2. After activating it, it doesn't seem to do much more the showing 20m somewhere on the right side. Does anybody have any clue what this is all about?

Kind greatz

Matthieu.

I've been looking around at one of these portable type oscilloscopes lately. In one video I saw on YT it was attempted to measure 50MHz with the frequency counter added to the latest firmware (at the time the video was made) and the count was obviously wrong. It was clarified near the end of the video that the frequency counter was for 20MHz only. Although it seemed to top out on that unit in the mid 30's.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #204 on: November 26, 2024, 05:47:27 am »
No, for these two options it has to do with BW on the two channels, and nothing to do with the frequency counter.  I'm very familiar with the YT vid you mention.  However if you enable the "20m" option for either channel (or both) that channel will be limited to 20MHz BW.
« Last Edit: November 26, 2024, 05:49:57 am by BillyO »
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Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #205 on: November 26, 2024, 11:29:12 am »
@ all,

Thanks, that clarifies a bit indeed. guess the 20M is some sort of low-pass filter?
it draws out another question though, what is so specific about 20Mhz that it deserves such a settings.

Kind greatings

Matthieu
 

Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #206 on: November 26, 2024, 01:07:50 pm »
guess the 20M is some sort of low-pass filter?

Yes.

it draws out another question though, what is so specific about 20Mhz that it deserves such a settings.

Read here: https://www.eevblog.com/forum/beginners/the-popular-oscilloscope_s-20-mhz-bw-limit/
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #207 on: November 28, 2024, 12:03:38 pm »
Here's the FFT frequency measurement cursor added in the -III firmware:



(Edited this post as I initially thought it was a new feature in 3.0.6-III, but it's been available for -III hardware, just not called out in this thread).
« Last Edit: November 28, 2024, 12:47:43 pm by taligentx »
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #208 on: December 02, 2024, 08:51:20 pm »
Current sale prices for one of the official Aliexpress storefronts (Zeeweii Factory Store):

https://www.aliexpress.com/item/3256805737614947.html
  • US: $76.86 - $12 coupon = $64.86, plus local tax, free shipping (need to add some other items to reach the $89USD threshold for the coupon)
  • EU: €91.99 - €12 coupon = €79.99, VAT included, free shipping
There are third-party sellers with lower prices but I figure it's more likely to get older hardware revisions that can't use the current firmware. Also, the coupon codes can go in and out of availability but the prices should be good until Dec 4.
 

Offline awakephd

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #209 on: December 04, 2024, 01:10:20 am »
In addition to trying to 'collect' functions that are not in the manual I bumped into the event counters and Freq counter under menu > dev > dev.
How do I get to menu > dev > dev? (Not sure what key dev is, or what that means).
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #210 on: December 04, 2024, 01:17:34 am »
In addition to trying to 'collect' functions that are not in the manual I bumped into the event counters and Freq counter under menu > dev > dev.
How do I get to menu > dev > dev? (Not sure what key dev is, or what that means).

It's "Menu > Disp > Disp"

The "Disp" key will be higlhighted once you hit "Menu", but its the "x1x10" key.
Bill  (Currently a Siglent fanboy)
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Offline awakephd

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #211 on: December 04, 2024, 01:19:39 am »
Has anyone made a sort of reference list of the "not in manual, but still present functions for now?
seems like an interesting thing to me, so people don't figure things out by accident and then let the information evaporate into oblivion.
I am trying to make a list here for myself, but am very will to post it when done.

for now I have the following items: but please add if I missed something.
- Voice control (although this is discussable, as there is a manual with it in it)
- Shift + V/ch2 → persistend mode /phosphor emulation.
- enter FG via the "Gen" button, sine wave is limited to 5MHz, full-screen FG via the "Home" menu (short press the power button) the sine functions at 10MHz
- new frequency counter is good from 15Hz to 35MHz - well beyond specification.

I echo the desire for a comprehensive list!
 

Offline awakephd

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #212 on: December 04, 2024, 01:20:11 am »
Got it, thanks!
 

Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #213 on: December 04, 2024, 11:14:40 am »

It's "Menu > Disp > Disp"

The "Disp" key will be higlhighted once you hit "Menu", but its the "x1x10" key.

Indeed it is, sorry for this oepsie, I modified the post to make it clearer for future readers.

kind greats

Matthieu
 
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Offline spikey1973

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #214 on: December 04, 2024, 11:17:38 am »
I echo the desire for a comprehensive list!

Just let me know when anyone finds some new option and I will add it.
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #215 on: December 10, 2024, 03:48:16 pm »
Looking through @timschuerewegen's work decompiling and modifying the DSO2512G firmware, one of the improvements is the font:



Tim also provided the original and modified font data. I poked around the DSO3D12 3.0.5-III firmware and it uses identical font data, so it seems possible to mod this scope as well. The trick is that the newer Zeeweii scopes (DSO154pro, DSO3D12, DSO1C81) use an mcu with integrated flash (Winner Micro W806-C200), and I haven't found an easy way to dump the flash so currently only firmware provided by Zeeweii can be modded.

The W800 docs describe the firmware format - a .fls file with multiple images (bootloader, runtime image, etc), each with a separate header with checksums for the individual image and the header itself. It's possible to manually replace the data and calculate new checksums. Possible, but seems like a pain so...

Here's a tool to view .fls firmware header/image info, replace data with updated checksums, and extract images: https://github.com/taligentx/FLSTweak

I've added the font mod data to the examples directory, as well as a mod to fix the UI bug for the "Mea:" field label (it has an extra colon as circled in the screenshot above). The tool generates a new .fls file that can be flashed to the scope with this Windows tool or wm.py in the WM IoT SDK. Disclaimer: this is totally untested! My scope arrived with the newer 3.0.6-III firmware and I'll need to get a copy to test.

If you have a scope running 1.1.2 or 3.0.5-III and would like to try the updated UI, I can provide the steps or send a modded file. If there are any issues, it should be possible to flash the original firmware but needs testing.

I'm also interested in finding a way to dump the flash - the W80x series chips are also commonly used on smart home devices, etc. Would love to hear thoughts on ways to try this or general modding. For example, the W806 has six UARTs, it'd be interesting to see if any of them can be used to send data externally.
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #216 on: December 10, 2024, 04:26:14 pm »
Here's the output looking at v3.0.5:
Code: [Select]
$ ./flstweak.py dso3d12_v3.0.5_III.fls
Detected firmware type: W80x

Image 0:
  Image attributes:
    Type: Bootloader (0x0)
    Encryption: False
    Encryption private key #: 0
    Signature: False
    GZIP compression: False
    Block erase: False
    Always erase: False
    Compression type: 0
  Image address: 0x08002400
  Image size: 31580
  Header address: 0x08002000
  OTA update address: 0x08010000
  OTA update version: 0x00000000
  Version:
  Next image header address: 0x08010000
  Image checksum: 0x7C67C28A (verified)
  Header checksum: 0x2857E698 (verified)

Image 1:
  Image attributes:
    Type: User image (0x1)
    Encryption: False
    Encryption private key #: 0
    Signature: False
    GZIP compression: False
    Block erase: False
    Always erase: False
    Compression type: 0
  Image address: 0x08010400
  Image size: 417952
  Header address: 0x08010000
  OTA update address: 0x08010000
  OTA update version: 0x00000000
  Version:
  Next image header address: 0x00000000
  Image checksum: 0xD34FECFB (verified)
  Header checksum: 0x5325676A (verified)

Taking a look at image1 (the user runtime), there are also some typos for the calibration mode ("claib"):
Code: [Select]
Factory claib mode
Self-inspection
Claib: 100mV
Claib: temp
Claib: 1.0A
Claib: 100mA
Please restart!
 DCV = 5.000V
 Res = 100.0K
 DCA = 1.000A
 DCmA = 100.0mA
 Done!
Max 1000V
Max 600mV
Max 750V
Max 10A
Max 600mA
USB/DMM Conflict!
DC-1000V
DC-600mV
AC-750V
AC-600mV
DC-10A
DC-600mA
AC-10A
AC-600mA
DMM claib mode

And still present in 3.0.6:


Should be easy to fix these types of issues.
« Last Edit: December 10, 2024, 04:46:46 pm by taligentx »
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #217 on: December 13, 2024, 10:55:43 am »
Taking a closer look at the fonts - I found that ImageMagick works to convert the 1-bit font data for the small and large font:
Code: [Select]
$ magick -depth 1 -size 8x13 gray:zeeweii_font_small_ref.bin zeeweii_font_small_ref.bmp
$ magick -depth 1 -size 16x16 gray:zeeweii_font_large_ref.bin zeeweii_font_large_ref.bmp
This converts the raw font data to a series of bitmap files (should be a total of 95 files, covers ASCII characters 32-126).

Original Zeeweii (top) vs modified @timschuerewegen (bottom) - small font:


Large font:


The Zeeweii font has...issues. Even aside from the poor legibility, some characters like the curly braces {} in the large font are totally wrong.

As far as the scope itself, so far I've enjoyed using it! It came in handy to take a look at an LED strip power supply PWM and it correctly measured the duty cycle of the PWM down to the strips minimum at 10%. I have a couple of boat anchor Tek scopes but they're halfway around the world and don't have the measurements so this is a treat.

Edit: fixed the command for the large font, should be 16x16
« Last Edit: December 13, 2024, 07:29:51 pm by taligentx »
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #218 on: December 15, 2024, 02:38:14 pm »
Success!



Instructions are on the repo - FLSTweak 1.0: https://github.com/taligentx/FLSTweak
 
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Online cte

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #219 on: December 15, 2024, 04:17:42 pm »
Just did the update procedure on my v3.0.5_III device and I'm now running v3.0.6_III with the better font.  :-+

I had to run calibration after updating, but this worked without issues.

@taligentx: Thank you for the work! May I ask where you found the firmware v3.0.6_III for download? Zeeweii's website still shows v3.0.5_III.


And for the people running linux: The flash.py tool from the wm_iot_sdk needed some additional libraries. This should do the trick:
Code: [Select]
$ pip install colorama PyPrind pyserial serial xmodem
Verbose version info:
Code: [Select]
❯ python --version
Python 3.12.7
❯ pip freeze
colorama==0.4.6
future==1.0.0
iso8601==2.1.0
PyPrind==2.11.3
pyserial==3.5
PyYAML==6.0.2
serial==0.0.97
xmodem==0.4.7
⚡ To avoid electric shock, ensure that your instrument is correctly grounded.
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #220 on: December 15, 2024, 07:37:36 pm »
Great to hear! For the python dependencies, I've updated the flashing steps - the SDK actually includes requirements.txt with the necessary packages, so you can point pip to that file.

For the firmware, Zeeweii were kind enough to send via email - I have zero expectations of support for manufacturers that sell via Taobao/Aliexpress/etc so this was a pleasant surprise. That said, they may be waiting to see if there are any major bugs in the firmware before giving it a wider release on the support site. Or they just haven't bothered to update the site.

I had to run calibration after updating, but this worked without issues.

Can you elaborate on this? What was happening after the update?

I did notice that settings and saved waveforms remained even after flashing - the firmware is ~475kB out of the available 1MB so there's room for persistent storage. Also, it's clear that the saved waveforms are not screenshots/bitmaps - the scope is saving the data and re-rendering the display, because after flashing, all of the old saved waveforms were using the new fonts!
 

Online cte

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #221 on: December 15, 2024, 08:14:53 pm »
I had to run calibration after updating, but this worked without issues.

Can you elaborate on this? What was happening after the update?

There was an significant offset. With the inputs left open, Ch1 was ~0.8 div above the GND marker.
⚡ To avoid electric shock, ensure that your instrument is correctly grounded.
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #222 on: December 16, 2024, 01:10:39 am »
Update - FLSTweak 1.1: https://github.com/taligentx/FLSTweak

I rendered a new small font with all of the characters shifted down by 1 pixel. On the DSO3D12, the measurement labels each have a rounded background and the font from Tim was not centered. The DSO2512G doesn't have the background so the font alignment isn't as noticeable.
Before (left) vs after (right):


Working out how to render the font also means other font types can be swapped in if they look good at 8x13 and 10x16 pixels.
 
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Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #223 on: December 24, 2024, 02:19:20 am »
Hello everyone,
The +bandwidth setting is not displayed automatically.

Is there a different way to set it up?



 

Offline Medvidas

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #224 on: December 25, 2024, 08:40:19 pm »
@taligentx: Thank you for your modified FW. I am now on your 3.0.6-III mod and it looks much better. It should be part of the original firmware, maybee Zeeweii can be open to incorporate your mod into the master FW. I kind of dream that one day they will share the source code and let the community tweak the device in their own image. Then they could sell zillions of devices and everyone would be happy.  :)

You make good point with the View gallery, the images are re-rendered in new fonts. If scope really keeps the source data, then it's a pity that zooming and cursor operations are not implemented in the gallery.

And the last thing I haven't seen described anywhere and discovered while working with the gallery of saved images - pressing x1x10 works as a delete button!  ;)
 
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Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #225 on: December 29, 2024, 12:09:12 pm »
Answer from ZEEWEII

Hello,
Since such waveforms are actually debatable, I recommend using cursors for measurements. Press "Shift"->"s" to open the time cursor.
For example, in the image below, it is hard to determine whether the negative pulse width is A or B. With an oscilloscope, it is really hard to judge.
width-.jpg  
 

Offline LucSVK

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #226 on: January 10, 2025, 07:57:20 pm »
Hello Guys,
  Please, do you have any Hi-Res pictures of the device's PCB?

Thanks a lot!
 

Offline wasedadoc

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #227 on: January 10, 2025, 08:33:19 pm »
Hello Guys,
  Please, do you have any Hi-Res pictures of the device's PCB?

Thanks a lot!
At least one of the YT reviews linked in posts above has good views of the internals. https://www.eevblog.com/forum/testgear/another-dsodmm-zeeweii-dso3d12-claimed-120mhz250msps/msg5274556/#msg5274556
« Last Edit: January 10, 2025, 08:38:59 pm by wasedadoc »
 

Offline LucSVK

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #228 on: January 10, 2025, 09:49:57 pm »
Hi, I have seen the reviews but unfortunately it isn't enough.

I would like to see what is connected where and gather as many information/datasheets as I can.

I wonder if they even are able to implement USB/OTG or any other high speed communication + other stuff. Or for example if it's possible to implement DMM reading while it's charging from a power bank.

In the review they mentions Winner Micro W806-C200 MCU, which is pretty limited, but there ale more chips on the PCB, but in general traces are not clearly visible.

So maybe, could somebody make hi-res photos of the internals? Sure just for educational purpose only!

Btw I've downloaded the firmware and the archive contains ch341ser driver/installer and 440kB firmware So it seems that any high speed communication with PC won't be possible.

I haven't bought this device yet, so I can't make the photos myself.

Thanks a lot!
 
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #229 on: January 10, 2025, 09:55:38 pm »
I would like to see what is connected where and gather as many information/datasheets as I can.

It is likely a 6 or more layer board.  How would you determine the connections through the internal layers?

What is the purpose of all this?

The com port is there for firmware updates only.  There is no file transfer or real-time image transfer capability.
Bill  (Currently a Siglent fanboy)
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #230 on: January 10, 2025, 09:59:55 pm »
I wonder if they even are able to implement USB/OTG or any other high speed communication + other stuff. Or for example if it's possible to implement DMM reading while it's charging from a power bank.

DMM while connected to a charger would be a good hack for working on low voltage stuff on the bench all day.

But it's probably better done in firmware.
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #231 on: January 10, 2025, 10:25:06 pm »
DMM while connected to a charger would be a good hack for working on low voltage stuff on the bench all day.

But it's probably better done in firmware.

I think it's quite likely a hardware limitation.  While the MCU has a lot of serial options they come out on multi-purpose I/O pins that may be used for other things.  It may have only a single serial port exposed and shared between the DMM chip and the CH341.  If that's the case, I guess you could have it ask when you plug it into a USB power source if you want to do a firmware update or not.
« Last Edit: January 10, 2025, 10:31:38 pm by BillyO »
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #232 on: January 10, 2025, 10:29:45 pm »
I think it's quite likely a hardware.  While the MCU has a lot of serial options they come out on multi-purpose I/O pins that may be used for other things.  It may have only a single serial port exposed and shared between the DMM chip and the CH341.  If that's the case I guess yo could have it ask when you plug it into a USB power source if you want to do a firmware update or not.

Sure, it migth be possible, but given the choice between uploading a firmware and opening it up to cut tracks on the PCB (or whatever) it think it would be much better to come up with a firmware fix.
 

Offline LucSVK

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #233 on: January 10, 2025, 11:26:24 pm »
I would like to see what is connected where and gather as many information/datasheets as I can.

It is likely a 6 or more layer board.  How would you determine the connections through the internal layers?

What is the purpose of all this?

The com port is there for firmware updates only.  There is no file transfer or real-time image transfer capability.

That's of course impossible from any photos. But you can find out more from hi-res detailed photos than from the YT review where you can see just a part of the board and not even clearly. From the review you can see that there are more chips ( some of them with removed names ). Maybe it could be possible to identify what they are (based on parts around), how they are connected together? Maybe it could open new possibilities .. For example in the review I can see two such chips outside the CAN. One could be AG32VF MCU/ASIC LQFP48 ( maybe AG32VF303CCT6 )? .. If it actually is, it has some interfaces too.. for example Ethernet PHY, USB2.0, SPI, UARTs .. How is this chip interconnected with the main MCU? Etc .. That's why at least the photos could be useful.
« Last Edit: January 10, 2025, 11:59:24 pm by LucSVK »
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #234 on: January 11, 2025, 01:32:34 pm »
Here are a few shots from when I was looking for a way to dump the W806 firmware:
2480405-0

2480397-1

2480401-2
« Last Edit: January 11, 2025, 01:37:18 pm by taligentx »
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #235 on: January 11, 2025, 01:36:53 pm »
2480417-0

2480409-1

2480413-2
« Last Edit: January 11, 2025, 01:46:02 pm by taligentx »
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #236 on: January 11, 2025, 01:38:59 pm »
2480425-0

2480421-1
« Last Edit: January 11, 2025, 01:46:21 pm by taligentx »
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #237 on: January 11, 2025, 01:41:06 pm »
2480437-0

2480429-1

2480433-2
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #238 on: January 11, 2025, 01:45:02 pm »
Last of the photo set:

2480449-0

2480441-1

2480445-2
« Last Edit: January 11, 2025, 01:46:51 pm by taligentx »
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #239 on: January 11, 2025, 02:28:43 pm »
While the MCU has a lot of serial options they come out on multi-purpose I/O pins that may be used for other things.  It may have only a single serial port exposed and shared between the DMM chip and the CH341.

This seems likely based on the "dmm uart init" message that is sometimes sent after flashing:


 
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Offline LucSVK

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #240 on: January 11, 2025, 09:05:19 pm »
Taligentx: Thanks for the photos!

I can't see the ch341 on the photos. Where is it hidden? Under the beeper?
 

Offline billm

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #241 on: January 12, 2025, 05:36:45 am »
If it's of any use, I've annotated a photo of the top of the circuit board.
 

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #242 on: January 12, 2025, 07:04:54 am »
Is it emulated by software?  i.e. USB, which sounds like ch341 in the PC.  No physical chip is required.
FNIRSI 1013D Always provide a picture or video with the problem where the parameters of the oscilloscope are visible, and a picture of the diagnostic screen with the values.
Firmware is here (or not) https://github.com/Atlan4/Fnirsi1013D/tree/main/latest%20firmware%20version
 

Offline LucSVK

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #243 on: January 12, 2025, 09:42:07 am »
If it's of any use, I've annotated a photo of the top of the circuit board.

Hi billm,

The chips named in you photo  as:
FPGA => It's very probably DMM chip
High Speed RAM =>  In newer revision it's AG32 MCU ( AG32VF303CCT6  ). It has 128 Kbytes of SRAM. On vendor's website they mentions (if I understand it correctly) that it's 2k CPLD too..
And there is a battery charging IC under the heatsink at the upper left corner .. - In newer revision it's IP2312
« Last Edit: January 12, 2025, 10:39:33 am by LucSVK »
 
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #244 on: January 12, 2025, 11:56:34 am »
They actually put in a special speech recognition chip?  :o

I thought it was just somebody at the company messing around one day.
 

Offline motoge

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #245 on: January 12, 2025, 01:26:28 pm »
Hello. Can you tell me where I can find the firmware v3.06?
 

Online cte

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #246 on: January 12, 2025, 02:01:09 pm »
Hello. Can you tell me where I can find the firmware v3.06?

It hasn't been officially made available yet, but you can find v3.0.6_III on GitHub.

https://github.com/taligentx/FLSTweak/tree/main/Zeeweii_DSO3D12
⚡ To avoid electric shock, ensure that your instrument is correctly grounded.
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #247 on: January 13, 2025, 02:20:39 am »
I can't see the ch341 on the photos. Where is it hidden? Under the beeper?
That may be the case.  That's where the USB connector is.

Yup - that's where it is.

Bill  (Currently a Siglent fanboy)
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Offline billm

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #248 on: January 13, 2025, 07:19:00 am »
The chips named in you photo  as:
FPGA => It's very probably DMM chip

The W806-C200 has a 16 bit ADC which I had assumed would be used for the multimeter functions.

High Speed RAM =>  In newer revision it's AG32 MCU ( AG32VF303CCT6  ). It has 128 Kbytes of SRAM. On vendor's website they mentions (if I understand it correctly) that it's 2k CPLD too..

That is puzzling. The AG32VF303CCT6 has a maximum clock of 208 MHz which would normally make it far too slow to take samples from the high speed ADC at 250 MS/s. The data sheet says there is a 2k LE FPGA onboard, but I haven't found anything else much about it, apart from it having a total of 4 kB RAM (far too small to gather the ADC samples). Part of the FPGA seems to be dedicated to part of the internal clock tree.

There is some data on the AGRV2K FPGAs from the same company available. One of these appears to be similar to the one on the AG32 chip and there is some timing data given for these. Most times are in the range of 0.5 to 2 or so ns. I don't know whether these would add up in a way that would make a sequencer for transferring data to the 128 kB RAM at 250 MS/s, even if that RAM can be pushed to take the data at that rate.
 

Offline billm

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #249 on: January 13, 2025, 09:58:21 am »
Here's an updated version of the annotated photo.
2481865-0
 

Offline LucSVK

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #250 on: January 13, 2025, 06:52:33 pm »
Hi Billm

http://www.agm-micro.com/products.aspx?lang=&id=3113&p=37

MCU frequency 248Mhz
SRAM 128Kbytes

So are we sure that 248Mhz is not enough?

Because rough calculation ( not sure if correct  ) would be

We need 250MSps. (It's for both channels of ADC together. It should be enough for both channels at 60Mhz or one channel at 120Mhz as they mention in their specs.)

1 Sample => 8 bits = 1Byte
If we take 2 samples at a particular time ( either for both channels or one channel using both channels of ADC )
Theoretically we can
2 Bytes * 248 Mhz => 496MBps using half of the bandwidth of the memory

I am not sure how many CPU cycles writing into the internal memory takes. Or if any at all, because they mention DMA access.
But it looks like it should be enough.  I am just a total beginner, so maybe this calculation is all wrong.
« Last Edit: January 13, 2025, 11:26:14 pm by LucSVK »
 

Offline billm

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #251 on: January 13, 2025, 11:16:13 pm »
http://www.agm-micro.com/products.aspx?lang=&id=3113&p=37
MCU frequency 248Mhz
SRAM 128Kbytes

This is where things get just a little uncertain.

Version 1.0 of the Data Sheet says that the Maximum Speed of the AG32VF303 is 208 MHz. Only the AG32VF407 gets 248 MHz. All other versions are even lower speed.

Version 1.2 of the Reference Manual gives the maximum speed of all versions as 248 MHz! Why the difference? Which one is correct?

Assuming that the 248 MHz is correct, then running at 250 MHz is not a big deal. It just gives the manufacturer an excuse to not support you if it doesn't work.

So are we sure that 248Mhz is not enough?

It's difficult to answer that question. The 248 MHz is just a clock on the chip. It doesn't tell you how long any particular operation takes. You need extra information for that, which doesn't appear in the Data Sheet nor the Reference Manual. Any particular operation might take more than on clock cycle.

Assuming that these chips use just one cycle for any (or almost all) operations. Then that would imply that the RAM should be able to get written to at a 250 MHz rate.

That just leaves a few more questions, including:
Are the general purpose I/O pins capable of handling data at a 250 MHz rate?
Where is the comparator to handle triggering? The DMA subsystem doesn't appear to have one.
Is the FPGA user-programmable?

Scanning though the manuals, I couldn't find an answer to these questions. Perhaps there are other manuals available?

I can't say that the chip is capable of performing the required function, but nor can I rule it out.

Because rough calculation ( not sure if correct  ) would be

We need 250MSps. (It's for both channels of ADC together. It should be enough for both channels at 60Mhz or one channel at 120Mhz as they mention in their specs.)

1 Sample => 8 bits = 1Byte
If we take 2 samples at a particular time ( either for both channels or one channel using both channels of ADC )
Theoretically we can
2 Bytes * 248 Mhz => 496MBps using half of the bandwidth of the memory

I am not sure how many CPU cycles writing into the internal memory takes. Or if any at all, because they mention DMA access.
But it looks like it should be enough.  I am just a total beginner, to maybe this calculation is all wrong.

You certainly could ease the speed problem by gathering multiple bytes and feeding them as a block to the chip. However, that means that you need extra logic external to the chip (registers and sequencing logic). I see no evidence of that logic on the circuit board. EDIT: I now see that you don't need these separate registers, etc. All you need is a dual ADC, and when you look at the board photos, this seems to be the case. I don't know what the actual ADC is, but the pinout looks similar to an AD9288, as shown in this annotated detail:


« Last Edit: January 14, 2025, 06:26:35 am by billm »
 

Offline UniSoft

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #252 on: January 14, 2025, 09:34:34 am »
I don't know what the actual ADC is, but the pinout looks similar to an AD9288
probably it is a MXT2088 (analog AD9288)... (MXT2088 used in Fnirsi 2C53P)
In the case of the AD9288, the erased area would be larger.
MXT2088 has a minimum area of ​​marking.
 
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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #253 on: January 15, 2025, 09:53:43 am »
I echo the desire for a comprehensive list!

Just let me know when anyone finds some new option and I will add it.
menu-set-Hold down "s" - change background color of measurements
menu-set-Hold down "Gen" - alternator voltage change by 3 volts
menu-disp-Hold down "Stop" - strange mode
« Last Edit: January 16, 2025, 09:10:51 am by free0704 »
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #254 on: January 15, 2025, 03:01:19 pm »
Retention?  :-//
Bill  (Currently a Siglent fanboy)
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Offline free0704

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #255 on: January 15, 2025, 04:51:47 pm »
Retention?  :-//
Hold down for a couple of seconds
 
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Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #256 on: January 15, 2025, 05:24:10 pm »
menu-set-retention s - change background color of measurements
What is "s"?

menu-set-retention Gen - alternator voltage change by 3 volts
This does not work for me

menu-disp-retention Stop - strange mode
For me this changes the graticule.
Bill  (Currently a Siglent fanboy)
--------------------------------------------------
 

Offline free0704

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #257 on: January 15, 2025, 05:36:04 pm »
menu-set-retention s - change background color of measurements
What is "s"?

 
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Offline free0704

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #258 on: January 15, 2025, 05:38:38 pm »
menu-set-retention Gen - alternator voltage change by 3 volts
This does not work for me


 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #259 on: January 15, 2025, 05:43:41 pm »
menu-set-retention Gen - alternator voltage change by 3 volts
This does not work for me




Still does not work.  What firmware are you on?
Bill  (Currently a Siglent fanboy)
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Offline free0704

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #260 on: January 15, 2025, 05:44:53 pm »
menu-set-retention Gen - alternator voltage change by 3 volts
This does not work for me




Still does not work.  What firmware are you on?

3.0.6-III with changed fonts from this theme
 

Offline BillyO

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #261 on: January 15, 2025, 05:47:09 pm »
Okay, I'm still on 3.0.5 III.

So, it looks like hidden features are likely to change without notice across firmware revisions.
Bill  (Currently a Siglent fanboy)
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #262 on: January 15, 2025, 10:04:37 pm »
probably it is a MXT2088 (analog AD9288)... (MXT2088 used in Fnirsi 2C53P)
In the case of the AD9288, the erased area would be larger.
MXT2088 has a minimum area of ​​marking.

This would match up with the DSO2512G:

Hi, hope my reply will help you guys. The ADC of the DSO2512G is MXT2088, which has built-in dual ADCs, can run up to 125Mhz, and can reach a single channel of 250Mhz at 180° clock phase shift, so the physical sampling rate of DSO2512G is 250Mhz. But why declare 500Mhz? FPGAs can actually achieve "equivalent sample rates," and competitors claim their toys as 500M and 1Ghz sample rates, so you have to make a compromise between market survival and integrity. The 8091 chip can easily drive a 50R load, and the bandwidth exceeds 200Mhz at G=1, so the analog front end will not make any restrictions on the 120M frequency. No CMOS op amp has a high "slew rate," so measuring high-frequency signals requires an X10 probe to reduce the input voltage. All of Fnirsi's oscilloscopes over $50 use the MXT2088, and the actual vertical sensitivity = 100mV due to the lack of a 10x gain amplifier (claiming 50mV is because they use software to process waveform amplitude).
In my opinion, the DSO2512G is the best oscilloscope with the highest bandwidth/10mV sensitivity/performance for less than $90, if you find a better model than the DSO2512G at this price, please let me know.
 

Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #263 on: January 16, 2025, 03:24:22 pm »
menu-set-Hold down "s" - change background color of measurements

Nice to know about, thanks for finding these options.  This one cycles between 4 themes for the measurement labels:


I've also added a mod to the repo that changes the measurement labels a bit as seen above (removes the divider colon, capitalize first letter only, replace "Mea" with "Avg":

https://github.com/taligentx/FLSTweak

This is a personal preference so I haven't changed the mod.fls file in the repo, this will need to be applied separately if interested.
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #264 on: January 19, 2025, 11:44:42 am »
menu-set-Hold down "Gen" - alternator voltage change by 3 volts

This cycles between 4 signal generator voltages in the following sequence:
Code: [Select]
  Label   |  Measured  |  Programmed?
----------------------------------------
Vol 2.5V  |   2.79Vpp  |   ~2.75Vpp
Vol=2.5V  |   2.48Vpp  |   ~2.50Vpp
Vol 3.0V  |   3.22Vpp  |   ~3.25Vpp
Vol=3.0V  |   2.91Vpp  |   ~3.00Vpp

The programmed value is a pure guess on my part, it seems like the intent is to have adjustments in 0.25v increments, but I'm not clear on the label naming.  The "Vol=2.5V" and "Vol=3.0V" seem logical but the other two are unclear. The labels are just strings in the firmware (not computed values) and easy to change to something like "2.75Vpp/2.50Vpp/3.25Vpp/3.00Vpp" if this is accurate.

 
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Online Dmitur

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #265 on: January 20, 2025, 08:34:01 am »
At first, I want to thank taligentx for his firmware modifying utility. Then, to share firmware resources, that i've found. Needs to say, these resources are pretty eclectic. Many different types of digit typefaces and sizes; "Home" menu is just uncompressed 16bpp image with one third of total firmware size; "personalize" menu pretty neat drawn and accurately splitted for reducing its size, while most of others very ugly, etc. Most of these pictures would be good to be redrawn, but since most of the resources are low res 1bpp, redrawing them far beyond my capabilities to do it. So, I just share, what I've found. In the file name: first field - resource offset in 3.0.6 fls file, then - WxH size of picture in pixels and pixel size. In fls file, most of images contains its size before bitmap (one byte for width and one for height in case of 1bpp images, and 2*int16 for 16bpp images), some of them (mostly charsets) - don't, I've marked such resources with "_nohdr" suffix in their filenames. All of resources aligned at dword margin, so there are padding bytes between resources, when needed. Hope my findings will be interesting to someone. Any questions are welcome.

P.S. in mods.zip some of my graphics modifications.
« Last Edit: January 20, 2025, 10:32:03 am by Dmitur »
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #266 on: January 21, 2025, 01:25:59 pm »
Hi @Dmitur - thanks, this is really useful! In addition to helping with UI mods, it'll help narrow down the actual firmware code blocks for folks that have experience reverse engineering.

To make mods easier, I've updated flstweak to 2.0 with support for multiple replacements. The "--replace" option now directly accepts a reference file or a directory, and it will apply all reference files (ending in ref.bin) in the directory that have a matching mod.bin file (the "--ref" and "--mod" arguments have been removed):

https://github.com/taligentx/FLSTweak

I also updated the example firmware to dso3d12_v3.0.6_III_mod_v2.0.fls with the changed measurement labels and fixed the "Normal" trigger label.

Hope this helps,
Nikhil
« Last Edit: January 21, 2025, 01:31:00 pm by taligentx »
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #267 on: January 21, 2025, 02:20:51 pm »
Also for reference, here are the strings in the firmware, may help locating other options or features:

Image 0 (bootloader):
Code: [Select]
enter
Reg:
Fls:
OTP:
Mac:
FID:
ERR:
BW ch Param Wrong
BW capture Param Wrong
F:%d
Rx Param Setting Wrong
Tx Setting Wrong
R:%d,%d

Secboot V0.6

Image 1:
Code: [Select]
enter main
encrypt
Upload FPGA firmware...
It takes about 20 seconds.
Upgrade failed!
Please restart and try again.
upgrade successful!
menu_Init..
screenshot_init..
end lcd_set_pwm..
end fpga_all_reset..
WAVE_DUTY_CTRL = %x
end gray_Init..
end ui_all_Init..
end cursor_Init..
end fpga_waveout_ctrl..
waveout_Init..
Exit
 OK
CALIB
FAILED
start chB: %d
chB done: %d
DONE
counter=%d
timeCnt=%d
period=%d
freq=%d
WAVE_FREQ_WORD= %d
read maxmin1 error!!!!!
read maxmin2 Error error error!!!!!
Limit

page: home

PKPK
Mea:
Duty
Dut-
UPUPUPUPUPUPUPUPUP
view imgSel = %d
view imgIdx = %d
imgVal=%d
Image view
Can't save XY
SAVE DONE
queue init done = %d
sysParm.time_div = %d
sysParm.fs = %d
fs*div*12 = %d
interp.longTemp_int = %d
sysParm.interpTimes = %d
sysParm.preDepth = %d
sysParm.postDepth = %d
longTemp_int1
sysParm.col_len = %d
sysParm.start_col = %d
sysParm.end_col = %d
sysParm.trig_pos = %d
sysParm.winAddrOffset = %d
Gain calib mode
sysParm first init done! = %d
start setting...

dmm uart init
calib_keyCnt=%d
key_cnt0=%d
Factory claib mode
Self-inspection
Claib: 100mV
Claib: temp
Claib: 1.0A
Claib: 100mA
Please restart!
 DCV = 5.000V
 Res = 100.0K
 DCA = 1.000A
 DCmA = 100.0mA
 Done!
Max 1000V
Max 600mV
Max 750V
Max 10A
Max 600mA
USB/DMM Conflict!
DC-1000V
DC-600mV
AC-750V
AC-600mV
DC-10A
DC-600mA
AC-10A
AC-600mA
DMM claib mode
Save!
NOT SAVE!
 Voice OFF
 Voice ON (V1.0)
 Run/Stop
 Single
 X Y Mode
 Back
 CH1=AC
 CH1=DC
 CH2=AC
 CH2=DC
 Triger=CH2
 Triger=CH1
 VIEW
 Generator
 50%
 CH2 is ON
 CH2 is OFF
 Move down
 Move up
 DMM RES
 DMM Diode
 DMM Cap
 DMM Cont
 DMM DC-Vol
 DMM AC-Vol
 DMM DC-10A
AUTO
auto time out!!!!!!=================!!!!!!!
cntTime=%d <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
edge_cnt=%d <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
timeBase_sel=%d <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
cntTime2=%d <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
edge_cnt2=%d <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
timeBase_sel2=%d <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
max min %d %d<<<<<<<<<<
vertical done !
ch2_VolDiv_sel = %d
maxdiff mindiff %d %d<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\r
sysParm.ch2_VolDiv = %d

1999999999+
freq_hz timeout
sysParm.freq_calib_val=%d
batValue keyAdcVal= %d %d
Low power..

measure_len=%d
 !"#$%&&'(())**++,,--...///00011122223333444455556666677777888888999999:::::::;;;;;;;<<<<<<<=========>>>>>>>>>?????????@@@@@@@@@@@AAAAAAAAAAABBBBBBBBBBBBCCCCCCCCCCCCCDDDDDDDDDDDDDDDEEEEEEEEEEEEEEEFFFFFFFFFFFFFFFFGGGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHHHIIIIIIIIIIIIIIIIIIIIJJJJJJJJJJJJJJJJJJJJJJJKKKKKKKKKKKKKKKKKKKKKKKKLLLLLLLLLLLLLLLLLLLLLLLLLLMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZShift
RTAuto

 AC
 DC
 10X
 100X
 1X
Auto
normal
Rise
Fall
Manual
F_Meter:
Counter:
 ON
 OFF
CH1_20M:
CH2_20M:
Calib:AC gain
Calib:DC offset
Calib:DC offset2
v3.0.6-III
Reset
Reset All
Upgrade successful!
Please restart.
Vol=2.5V
Vol 3.0V
Vol=3.0V
Vol 2.5V
Loading fpga firmware2...
Loading fpga firmware1...
Loading fpga firmware3...
start download...
uart_update_logic failed!
uart_init_flash failed!
uart_download_init failed!
upgrade successful!

Init done. CLK: %.3fMHz, mem_addr=%x
.Aextended
standard
data
remote
can tx %s %s, dlc: %d, id: 0x%x
  data%d: 0x%02x
can tx done
can rx %s %s, dlc: %d, id: 0x%x
Can baud rate: %d with prescaler %d, SEG1/2: %dTQ/%dTQ
test can
  SR: %x
  IR: %x
  TXERR: %x
  RXERR: %x
passed
failed
Can test %s!
RTC second interupt: 0x%x
RTC alarm interupt: 0x%x
RTC overflow interupt: 0x%x
%d:%02d:%02d-%02d:%02d:%02d
rtc cnt: 0x%x
Enter stop in TestRTC
Exit stop from alarm
passed
failed
RTC test %s
WDOG reset flag: %d
not
Wdog init load: %d, will %sbe stopped in debug
Watchdog reset detected!
WDOG counter: %d
Implement main()!
(null)
RMII
Mac media:     %s
Mac macaddr:   0x%02x%04x
Mac phyaddr:   0x%x
Mac autoneg:   0x%x
Mac interface: 0x%x
Mac loopback:  0x%x
Mac mdcscaler: 0x%x
Mac duplex:    0x%x
Mac speed:     0x%x
Mac phy autoneg done: %s, link status: %s
Init done. CLK: %.3fMHz, RTC: %dHz
uart_init0 bytes(%d) ={
******************start fpga upload...****************************
******************start mcu_cor2 upload...****************************
CPU Exception : %u
r%d: %08x
epsr: %8x
epc : %8x
fni+
fni-
A../../../../../../../platform/component/FreeRTOS/tasks.c
Assert : %s %d
 

Offline GSN

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #268 on: January 26, 2025, 01:23:14 am »
So are DSO-3D12 and DSO-2512G pretty much the best cheap handheld scopes under $500 for those who don’t want to spend money on Micsig or Fluke? Is there any difference in DSO3D12 units from Zeewei versus other sellers? I prefer Amazon and it seems like all units currently listed there are sold by other companies besides the manufacturer.

Looking for a simple portable scope to use on 120v/240v mains, generators, audio and 12v automotive use. Is anti-burn protection on DSO's sufficient enough? Can they get damaged if I forget to switch 1x and 10x on the probe? Do both of them pretty much use the same design of the scope or is one better than the other? Not sure that I have a good use case for video out or a better signal generator. Otherwise they seem the same.

Any other handheld units to consider for work that doesn’t require very high precision? Don’t think I want to risk touchscreen issues with units like FNIRSI 1013D, features look cool, but I need them to actually work. Considered ZT-702S and I think I’d rather have more functionality of DSO’s. Not seeing any advantages of Hantek or Owon handheld units. What else is out there to consider?
« Last Edit: January 26, 2025, 01:28:43 am by GSN »
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #269 on: January 29, 2025, 01:05:42 pm »
(...)In the file name: first field - resource offset in 3.0.6 fls file, then - WxH size of picture in pixels and pixel size. In fls file, most of images contains its size before bitmap (one byte for width and one for height in case of 1bpp images, and 2*int16 for 16bpp images), some of them (mostly charsets) - don't, I've marked such resources with "_nohdr" suffix in their filenames. All of resources aligned at dword margin, so there are padding bytes between resources, when needed. Hope my findings will be interesting to someone. Any questions are welcome.

Hi @Dmitur - I've been looking through your work and it is extensive, thanks for the extraction and detailed info! Can you describe your process to find these? For example I think there are still some bitmaps for the signal generator screens that are still hiding in the firmware somewhere (unit labels like KHZ, MHZ, % symbol, etc). Also, would you mind if I add some of your mod files to my repo?

I started off making a few minor changes based on your findings and it snowballed into reworking most of the UI elements so I split off the Zeeweii-specific work to a new repo:

https://github.com/taligentx/ZeeTweak

Here are a few samples - the screens look a lot better on the scope, there are lots of aliasing artifacts when taking photos:












The home screen being an uncompressed 320x240 bitmap seems like a excessive use of space but it does create some options:


Then of course with 16bpp, you can go further - the screen contrast isn't high but still can display photos just fine:


Hopefully those with better graphic design skills can come up with a nicer images, for me this was a starting point to make the UI less of an eyesore.  Any substantial changes will need reverse engineering of the code as @timschuerewegen started on with the DSO2512G so there's plenty of room for improvement.
« Last Edit: January 29, 2025, 01:22:13 pm by taligentx »
 
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Offline taligentx

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #270 on: January 29, 2025, 01:38:41 pm »
So are DSO-3D12 and DSO-2512G pretty much the best cheap handheld scopes under $500 for those who don’t want to spend money on Micsig or Fluke?

Hi @GSN, I like the Zeeweii in the <$100 category (the DSO3D12 was ~$65USD + tax during 11.11 discounts). At $99 is the Dreamsource Labs DS4T252, which looks promising with its 1mV sensitivity, fast update rate, protocol decoders, and nice UI, though a slow signal generator (100kHz instead of 10MHz) and no DMM. I'm interested in seeing a head to head of these two scopes in case anyone gets both.

From $100-$500 there are many higher performing scopes and the Zeeweii should be thoroughly outclassed, but for many basic use cases it seems to work just fine.
« Last Edit: January 29, 2025, 01:48:02 pm by taligentx »
 

Online Dmitur

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #271 on: January 30, 2025, 07:52:00 pm »
Can you describe your process to find these?
Hi, taligentx. I did something similar on the ZX spectrum. :) Just wrote a simple program that displays bitmaps with tunable parameters. It's pretty easy. There is not so many possible formats to encode 1bpp graphics - differences mostly in bytes per line and bit direction in byte.

I've (not sure about legal status though) have disassembled firmware and discover it alot (not too difficult but labor-intensive work and still at square one). Some news - last 448 bytes in firmware - 224 word of palette (16bpp r/g/b). Oscilloscope renders all graphics into offscreen buffer 8bpp indexed color, and then translates that buffer to display module, converting these indices to 16bpp rgb using this palette colors. First 32 colors - basic and miscellaneous colors. Next 32 colors (32 through 63) - fixed gradient for ch1 (when selected "persists 1sec", signal pixels decremented in offscreen buffer by one - every frame, so it's fading. Too slow for my taste, i've replaced it with faster falloff, still too slow...). Color 63 used everywhere as ch1 color. Next 32 colors (64 through 95) - gradient for ch2, when it's green (magenta and cyan colors in this palette regenerates by program code, if color for ch2 changed to). Color 95 - used as ch2 color. And next large gradient (96 to 223) looks like used in "strange mode" posted by free0704 (probably, I don't know this for sure).

Display module looks like (or compatible to) Sitronix ST7789V2. Supports 18bpp color (reduced to 16bpp in our case - by hardware limitations) by itself, have its own framebuffer RAM, and complex command interface - all of this allows to draw good looking several menus ('cos it renders directly in display module), but main oscilloscope works in 8bpp. I don't think, that is possible to significant modify that behaviour in binary - without source code recompilation.

Also, would you mind if I add some of your mod files to my repo?
Yes, sure. Just feel free to use it as You wish. I don't use github or something, so my sharing caps are limited.

and it snowballed into reworking most of the UI elements
Oh, You did a great job. I'm still staring at disassembly listing.

P.S. I've redrawn trigger edge symbols pair, which appears at upper-right angle. Original symbols differs only by subtle arrow - not so noticeable. And fall edge not clear at all (looks like rising too). My version in attachment. Actually it is drawn with hardcoded size 10x13, even though it takes 16x14 bmp.
« Last Edit: January 31, 2025, 05:40:11 am by Dmitur »
 
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Offline GSN

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #272 on: January 31, 2025, 03:39:25 am »
At $99 is the Dreamsource Labs DS4T252, which looks promising with its 1mV sensitivity, fast update rate, protocol decoders, and nice UI, though a slow signal generator (100kHz instead of 10MHz) and no DMM. I'm interested in seeing a head to head of these two scopes in case anyone gets both. From $100-$500 there are many higher performing scopes and the Zeeweii should be thoroughly outclassed, but for many basic use cases it seems to work just fine.

Not sure I'd want to risk touchscreen issues with DSTouch 252, I'd guess that it's not going to have an expensive touch screen, so likely to have the same issues as 1013D units. Is there any difference between 3D12 units sold by Zeeweii and random resellers on Amazon? I might have seen something about firmware variations?

What other handheld models are good in the under-500 USD category? I don't mind spending a little more for a better quality unit that will last. I just need to be able to measure minimum 2 channels on 240V mains and 12V automotive and basic audio signals. For DMMs I use Flukes and no need for a signal generator that I can think of.



I did something similar on the ZX spectrum.

Now that's a blast from the past. Had a ZX-128 version in the early 90s hooked up to Beryozka tv when I was growing up. Vaguely remember writing some basic code that my friends in school showed me to make a swirly graphics thing that looked similar to the XY mode on a scope.
 

Online Atlan

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #273 on: January 31, 2025, 07:40:04 am »
What problems does the 1013D have with the touch screen?
FNIRSI 1013D Always provide a picture or video with the problem where the parameters of the oscilloscope are visible, and a picture of the diagnostic screen with the values.
Firmware is here (or not) https://github.com/Atlan4/Fnirsi1013D/tree/main/latest%20firmware%20version
 

Offline birdy

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #274 on: January 31, 2025, 02:24:37 pm »
I plan to buy an Oscilloscope. What is the better choice Zeeweii DSO3D12 or Fnirsi 1013D?
 

Offline tunkTopic starter

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #275 on: January 31, 2025, 03:08:25 pm »
Zeeweii - the Fnirsi have fake specs (I think the real specs are
200MSps and 30MHz) and the lowest vertical setting is 100mV/div.
 
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Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #276 on: January 31, 2025, 03:43:41 pm »
I plan to buy an Oscilloscope. What is the better choice Zeeweii DSO3D12 or Fnirsi 1013D?

Firstly, I don't understand how you can compare the two.
The Zeeweii is a “scopemeter” (DMM+oscilloscope), the Fnirsi is a touchscreen oscilloscope with some oddities.
Maybe you should first ask yourself what you generally prefer..
Neither of them are serious oscilloscopes in my opinion, but I would prefer the Zeeweii as a scopemeter.
https://www.beis.de/Elektronik/FNIRSI-1013D/FNIRSI-1013D_de.html

The cheapest “complete” oscilloscope is the Hantek DSO2C10.
It is far from perfect, but offers a hundred times more than these two.
Good oscilloscopes are somewhat more expensive:
https://www.batronix.com/versand/oszilloskope/Siglent-SDS804X-hd.html
« Last Edit: January 31, 2025, 03:55:29 pm by Aldo22 »
 
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #277 on: February 01, 2025, 06:03:14 pm »
I plan to buy an Oscilloscope. What is the better choice Zeeweii DSO3D12 or Fnirsi 1013D?

It's a question of what you prefer - bigger screen or better specs.

I'd get the Zeeweii.

(nb. The FNIRSI specs for bandwidth+sample rate are complete lies)
 
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Offline Aldo22

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #278 on: February 01, 2025, 07:14:49 pm »
In my view, the biggest problem with Fnirsi is not even a lie. It is the 50mV/div max. sensitivity from the specifications.
I have attached an example. This is the same signal three times.
With the Fnirsi you see at most the green signal (apparently, according to the text above, not even that works) and with the Zeeweii the yellow one. The gray one is from the Hantek.
With this poor sensitivity, you simply can't see many things.
 

Online Atlan

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #279 on: February 01, 2025, 08:25:52 pm »
Sensitivity is 100mV, 50mV is just software multiplication *2. Alternative software for 1013 does not suffer from the deadband. 1013D has a huge advantage of a touch screen, by the time you set it up on Tamagotchi oscilloscopes, with 1013 you already have the measured and stored scope.
FNIRSI 1013D Always provide a picture or video with the problem where the parameters of the oscilloscope are visible, and a picture of the diagnostic screen with the values.
Firmware is here (or not) https://github.com/Atlan4/Fnirsi1013D/tree/main/latest%20firmware%20version
 

Offline GSN

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #280 on: February 02, 2025, 04:47:57 am »
What problems does the 1013D have with the touch screen?
My understanding is that those screens often go out and, in general, the whole unit seems to easily brick itself. Reviews on US Amazon marketplace are not the greatest and it's marked as a "frequently returned" item. Most people reviewing those on YouTube are still on their first month and in the honeymoon period. Although I must admit that the touchscreen interface and the features look very tempting based on the review videos. Several people also mentioned that it's not quite true to spec.

I plan to buy an Oscilloscope. What is the better choice Zeeweii DSO3D12 or Fnirsi 1013D?
From what I've read, I believe that DSO 3D12 takes better measurements than 1013D, also less chances that it will stop working.

The cheapest “complete” oscilloscope is the Hantek DSO2C10.
It is far from perfect, but offers a hundred times more than these two.
Good oscilloscopes are somewhat more expensive: Siglent[/url]
And yes, for those looking for a better primary scope for not a whole lot more, Siglent or Rigol benchtop units seem to be a better choice, but they are not as portable as handhelds and don't run on batteries, so not the best for automotive or main panel work.
 

Offline black6host

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #281 on: February 02, 2025, 04:53:41 am »
Here's the nice thing, get the Zeeweii, figure out what you really need and if it's more then get a Siglent or Rigol bench scope.  I have both and they both have their place as mentioned above regarding battery operated and portable or more feature oriented but desk bound.
 
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Online Fungus

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #282 on: February 02, 2025, 09:17:35 am »
Sensitivity is 100mV, 50mV is just software multiplication *2. Alternative software for 1013 does not suffer from the deadband. 1013D has a huge advantage of a touch screen, by the time you set it up on Tamagotchi oscilloscopes, with 1013 you already have the measured and stored scope.

I don't want to downplay touch screens but i'll take issue with the "tamagotchi" comment.

Zeeweii's "Auto" buttons work really well and the DSO3D12 being discussed has separate buttons for horizontal+vertical.
 
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Online Atlan

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Re: Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)
« Reply #283 on: February 02, 2025, 07:40:53 pm »
Yes, I see that it allows you to change the channel sensitivity and time base directly with the buttons. Moreover, the buttons are labeled. Compared to the z703, it looks like it has better control.
FNIRSI 1013D Always provide a picture or video with the problem where the parameters of the oscilloscope are visible, and a picture of the diagnostic screen with the values.
Firmware is here (or not) https://github.com/Atlan4/Fnirsi1013D/tree/main/latest%20firmware%20version
 
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