Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)

[tunk]

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:

[Aldo22]

How did you find this?
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

[tunk]

How did you find this?

I was looking for info about the DSO154pro, and
looking at their support page, I found this manual.

[Aldo22]

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

[Aldo22]

More information, but no prices known yet.
http://www.zeeweii.com/productinfo/dso3d12.html

[Aldo22]

Now it's showing up on Aliexpress for ~$100.

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

[siealex]

Right after the day my ZT702S arrived...

[tunk]

Zeeweii has released a short demo: https://youtu.be/4YxVkRbYkwY

[yoga]

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

[Aldo22]

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).

[Aldo22]

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.

[RAPo]

I did buy one, just for trying out.

[Aldo22]

I did buy one, just for trying out.

You must have a pretty big toy budget? 

[Fungus]

Looks good!

[RAPo]

I did buy one, just for trying out.

You must have a pretty big toy budget? 

did get some unexpected money.

[RAPo]

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.

[Aldo22]

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... 

[dietert1]

If the instrument works well, then the voice assistant is an amazing idea. While handling probes this can be very nice.

Regards, Dieter 

[Veteran68]

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*).

[MadTux]

"50Ohm termination!"

Poof!

[Fungus]

Damn, these look good. Exactly what I need for my carry case.

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

[Smajdalf]

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.

[Aldo22]

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.

[Smajdalf]

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:

Built-in true RMS multimeter (...) osciloscope and multimeter may be used simultaneously (small window in the upper left corner)

That is promising, but

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:

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?

[Aldo22]

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

[RAPo]

Estimated delivery date = 30th august. A little bit of patience is needed.

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):

[Fungus]

I just found the manual for this online:

http://www.sigpeak.com/download/zeeweii-DSO3D12_manual_EN.pdf

[wasedadoc]

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.

[RAPo]

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.

[RAPo]

Got a message from Zeeweii:

DSO3D12 does not support transferring images to PC.

I asked to add this in a firmware update.

[RAPo]

Results from DMMCheckplus for the DMM:

[Aldo22]

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:

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.

[RAPo]

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.

[Aldo22]

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!

[RAPo]

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

[Aldo22]

Thank you!

Screen quality is the same as the DSO2512G

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

[ptluis]

Got a message from Zeeweii:

DSO3D12 does not support transferring images to PC.

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

[RAPo]

Indeed quite incomprehensible.
phone + OTG would be nice, but isn't there.  .

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

[RAPo]

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.

[ptluis]

Indeed quite incomprehensible.
phone + OTG would be nice, but isn't there.  .

phone camera 

[RAPo]

I'll know, I'll know 

Indeed quite incomprehensible.
phone + OTG would be nice, but isn't there.  .

phone camera 

[siealex]

I don't understand how they manage to launch a new product and remove important features.

To make them subscription based.

[RAPo]

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.

[ptluis]

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?

[wasedadoc]

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?

[Fungus]

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.

[ptluis]

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.

[RAPo]

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.

[RAPo]

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.

[Aldo22]

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 ¢

[dietert1]

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

[Fungus]

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.

[RAPo]

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 ¢

[Fungus]

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.

[RAPo]

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.

[RAPo]

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

[ptluis]

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?

[Fungus]

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.

[ptluis]

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.

[ptluis]

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.

[Fungus]

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)

[RAPo]

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.

[RAPo]

Got a message from Zeeweii:

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

Got a message from Zeeweii:

DSO3D12 does not support transferring images to PC.

I asked to add this in a firmware update.

[ptluis]

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  ... How did I forgot about peak trigger  ... 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.

[ptluis]

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 
 
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 

[Fungus]

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 

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.   

[ptluis]

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 

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.

[Fungus]

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/

[wasedadoc]

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.

[shakalnokturn]

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.

[wasedadoc]

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

[flywheelz]

shakalnokturn
have you seen Zoyi ZT703s, also 3.5" screen 2ch?

[shakalnokturn]

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...

[jdev99]

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.    

[Evi]

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

[BillyO]

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?

[Dave_g8]

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.

[Dave_g8]

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.



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

[jarpo]

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.

[Dave_g8]

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.

[BillyO]

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.

[BillyO]

I just discovered an undocumented feature on this little instrument.

If you goin 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.