Incorrect voltage/signal scale

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spiffed
Pre-kindergarten
Pre-kindergarten
Posts: 3
Joined: Sun Oct 25, 2009 5:10 am

Incorrect voltage/signal scale

Post by spiffed » Sun Oct 25, 2009 5:15 am

I've run into a bug, where the DSO Nano displays (part of) the correct signal, but at an inflated voltage on the display (and with the "V avg" measure).

[*]Test signal on 1V/div is 2.0v avg and displays correctly. Test signal on 2V/div is off the screen and 25.92V avg displayed. ???
[*]Measuring my signal generator's 5.1V output shows 81v avg.
Measuring small signals at 1V/div is correct.

FreeZinG

Re: Incorrect voltage/signal scale

Post by FreeZinG » Sun Oct 25, 2009 12:15 pm

when you change to 2V/div , do you change the triggering level to the correct place ,too.

May be you can save the picture of the screen with the Dat2Bmp Tool and post it here , and we can get more detailed about your problem and give some suggestion or processing.

spiffed
Pre-kindergarten
Pre-kindergarten
Posts: 3
Joined: Sun Oct 25, 2009 5:10 am

Re: Incorrect voltage/signal scale

Post by spiffed » Tue Oct 27, 2009 2:49 am

I've attached 1V/div and 2V/div images. My DSO Nano doesn't appear to work with my 64MB uSD card, so these are digital camera pictures...

The measured signal is the "test signal" available on the corner-pin @ 1000 Hz
Attachments
2Vdiv.jpg
2V/division
2Vdiv.jpg (246.31 KiB) Viewed 3995 times
1Vdiv.jpg
1V/division
1Vdiv.jpg (240.16 KiB) Viewed 3995 times

FreeZinG

Re: Incorrect voltage/signal scale

Post by FreeZinG » Tue Oct 27, 2009 10:32 am

Thanks ~ I got it ~

can you test the 0.2V and 0.5V /DIV and the 5V 10V /DIV ~ the former is right and the the latter is incorrect, that may be something wrong in the channel of the X6 - -|||

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