Products > Test Equipment

New 2ch pocket DSO+SG - Zeeweii DSO2512G

<< < (90/130) > >>

ptluis:

--- Quote from: Aldo22 on September 28, 2023, 09:57:43 am ---
E.g. you say "RMS measurements will show different, for ex: Before upgrade 1Vpp=740mV RMS, after upgrade 1Vpp=380mV RMS"

I don't see that with my "old" version (->image).
Was your Zeeweii maybe in DC mode and the Signal had a DC offset? 



--- End quote ---

I based my comment in your previous posted photo.
"Test, 1Vpp, 500Hz sine waveform" display on your device 721mV RMS
There's something wrong with this image, you say you test it with 1Vpp but if we count the division you apply 2.1Vpp



My devices display:
Frequency: 500Hz, 1Vpp, Sine waveform, RMS values
I use the same 200MHz Probe PP215 across devices at 1X

UT61E (Connected directly to FG output)
Sine wave: 351.7mV

Siglent SDS1202X-E and SDS1104X-E (Aquire mode Normal)
Sine wave: 351.8mV and 351.9mV

DSO2512G (Firmware 1.2.8.C+)
Sine wave: 349mV

DPOX180H (With the over compensated defect in AC coupling)
Sine wave: 332mV

ptluis:
I corrected the NOTE text about RMS on my firmware posted before. Sorry for that.

Aldo22:
Hi ptluis.


--- Quote from: ptluis on September 28, 2023, 10:28:28 pm ---I based my comment in your previous posted photo.
"Test, 1Vpp, 500Hz sine waveform" display on your device 721mV RMS
There's something wrong with this image, you say you test it with 1Vpp but if we count the division you apply 2.1Vpp

--- End quote ---
You mean this comment?

Yes, sorry for the confusion, but I didn't say Vpp.

Since the An870 can only measure Vrms and not Vpp, all the readings were in Vrms. Vpp measurement was turned off in the zeeweii.
It was set to ~1 Vrms square wave according to AN870 (first photo).
For the sine wave, I just changed the waveform and didn't change the volts.

But actually these pictures were not about the absolute amplitude but an example for the Vrms difference or agreement between the devices.

I'll try to be more precise next time.  ;)

Aldo22:
Thank you for the answers!  :-+


--- Quote from: ptluis on September 28, 2023, 09:36:05 pm ---3. how is the automatic calibration via menu related to this manual calibration?
Automatic calibration is part of the upgrade procedure, after the scope updates the firmware it enters the calibration mode automatically. You can always enter this mode manually

--- End quote ---
I would be interested to know if it affects the same parameters. Does a manual calibration override the automatic calibration and vice versa?
Have you ever tried a downgrade to the original version?
Will an automatic calibration make everything normal again, or were parameters manually changed that I can no longer reach with the original version?


--- Quote from: ptluis on September 28, 2023, 09:36:05 pm ---If you don't feel confident and are happy how your scope operates, honestly you shouldn't do it. Like I said you need to have a stable FG so that calibration is done properly .

--- End quote ---
I actually think that a FY3224S would be sufficient.
It is not very accurate to adjust, but it generates a stable 1 kHz sine wave at ~2.5 Vpp.
I can adjust the amplitude (mV) using the An870.
The feeltech AWGs can also be adjusted, but I'm not sure that makes much sense.


I would like to try it, but actually my DSO2512G is not that far off on the measurements. I'm not sure if I can even get it to be more accurate.
And so I'm still hesitant... :-\

Thank you.

ptluis:

--- Quote from: Aldo22 on September 29, 2023, 08:04:31 am ---Hi ptluis.

Yes, sorry for the confusion, but I didn't say Vpp.


--- End quote ---

Oops! my mistake  :) I'm replying on my cell phone, and doing a lot of Vpp work and my brain is formatted for Vpp  :palm:
Everything is clarified now.
Compare your results with my results. As you see Zeeweii is not to apart from the Siglents scopes

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod