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Owon 14-bit USB scopes

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balnazzar:

--- Quote from: egonotto on October 12, 2022, 08:27:16 am ---Hello,

An important point is that the Picoscopes do not have a fine adjustment of the vertical scale.

Best Regards
egonotto

--- End quote ---

Thanks, egonotto. That's just for the 2000 series, or it's an issue even for higher tier models like the 3000 and the 5000 series? Thanks!

egonotto:
Hello,

I believe all scopes. But with the 12 bit or 16 bit devices, that's not so bad anymore

Best regards
egonotto

jasonRF:
As far as I can tell, you can control the axes scaling, but that does not change the gain in the physical front-end.    To be honest, even the axis scaling is a little clunky.    I never use it, and for what I do it doesn’t matter very much.   But I could see that some people may really want that feature.   Does the Owon have it?   From the user manual it doesn’t look like it does. 

This is not the only quirk about Picoscopes.  The main one that sometimes causes me trouble is the fact that they have no automated measurements of time-delays (or phase delays) between signals in two different channels.  They really have no excuse for leaving that out. 

Jason

balnazzar:

--- Quote from: jasonRF on October 12, 2022, 07:22:12 pm ---As far as I can tell, you can control the axes scaling, but that does not change the gain in the physical front-end.    To be honest, even the axis scaling is a little clunky.    I never use it, and for what I do it doesn’t matter very much.   But I could see that some people may really want that feature.   Does the Owon have it?   From the user manual it doesn’t look like it does. 

This is not the only quirk about Picoscopes.  The main one that sometimes causes me trouble is the fact that they have no automated measurements of time-delays (or phase delays) between signals in two different channels.  They really have no excuse for leaving that out. 

Jason

--- End quote ---

Good to know that, thanks. It's a bit disappointing.

balnazzar:

--- Quote from: jasonRF on October 11, 2022, 02:48:21 pm ---I don't know about the hardware, but the software has no features.  Zero waveform arithmetic, so you cannot even subtract two channels.  Likewise, no FFT of any kind.  I even emailed the company earlier this year and verified that it had none of those features, although they indicated that they are planning on adding them.  If/when they do add an FFT you will need to look closely at how long it is.  For example, according to the user manual the 8-bit vds3102 only has a 2k FFT so gives only 1k frequency bins, even though it has 10 MSamples of memory. 

I have downloaded both the vds3102 and vds6102 software, and the features line up with the documentation.  No math menu of any kind on the vds6000 software, and the vds3102 software gives you no choice of any kind for the FFT length.  It is fixed.

So even if the 14-bit hardware is great, if you want to do anything more than just look at waveforms and do basic measurements on them you will need to write your own software and just use the scope as an acquisition system.  For me it was a deal-breaker. 

I ended up on Ebay and managed to pick up a used (and out of production) multi-resolution Picsocope 5244B for $457 US delivered. 

By the way, which 8-bit picoscope were you looking at that was priced that high?  They have a ton of models. 

EDIT: Hi Balzannar.  I just realized that you started this thread - surely as part of your quest to find a quiet scope.  It looks like you are going down the same path I did earlier this year.  good luck!

jason

--- End quote ---

Mh, I bought an Owon VDS1022i because it's a little insulated scope for just 119 eur (Amazon). Consider that comes with two probes.

Look, this is just the calibration waveform, but it can do the FFT and some math:



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