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Channel A acting weird.

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Channel A acting weird.

Postby coinmaster » Mon Jan 11, 2016 12:30 am

Hello, I just received my picoscope 2204 and tried to calibrate my probes using a square wave via the internal waveform generator and channel B shows the square wave just fine but channel A is showing a trapezoidal wave. I tried switching around the probes and it is not the probes that are the problem, channel A itself is reading it as a trapezoidal wave.
Is there some setting that would cause this or is my unit defective?
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Re: Channel A acting weird.

Postby Martyn » Mon Jan 11, 2016 11:10 am

Can you post a psdata file with each channel active and connected to the same probe, File->SaveAs and just save the current waveform, and we can take a look.
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Re: Channel A acting weird.

Postby coinmaster » Mon Jan 11, 2016 5:32 pm

Here you go
Attachments
20160111-0001.psdata
(405.08 KiB) Downloaded 72 times
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Re: Channel A acting weird.

Postby AndrewA » Wed Jan 13, 2016 2:30 pm

Hi,

I see the issue, you have 'Resolution enhancement' turn on and set to 12-bits. (As your number of samples are low, the 'Resolution enhancement' is acting as a filter.)
Go to the channel 'A' option window. (click on the A button) set the Resolution enhancement back to 8-bits (turns it off).
Channel A now returns to a square wave.
https://www.picotech.com/library/oscilloscopes/resolution-enhancement
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Re: Channel A acting weird.

Postby coinmaster » Sat Jan 16, 2016 8:00 pm

That was it, thanks.
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