Weird waveform when using PCI-5922

[fomine]

Hello,

I am having some difficulties with PCI-5922.

Instead of seeing a sine wave (generated by PCI-5421), I see the attached waveforms, in both MAX and niScope EX Configured Acquisition.vi

Sometimes it would switch to show a normal sine wave, often times it will time out.

What could be a problem?

Thanks,

 Fomine

[Jennifer O · Accepted solution]

That is weird.

Could you provide some more details on your setup?

1)What is your operating system?

2)What versions of NI-SCOPE and NI-FGEN do you have?

3)Do you have another signal source to test so that you could narrow the problem to the digitizer or the generator?

4)Do you measure the same thing on channel 0 & channel 1?

5)What is the expected amplitude of your sine wave?

6)What is the result of performing a self calibration on both of these boards?

-Jennifer O.

[fomine]

Please see my answers that I can provide now, and I will get the rest answered shortly

That is weird.

Could you provide some more details on your setup?

1)What is your operating system?

XP SP3

2)What versions of NI-SCOPE and NI-FGEN do you have?

 SCOPE 3.5.2 FGEN 2.6.3

3)Do you have another signal source to test so that you could narrow the problem to the digitizer or the generator?

WIll do, but I don't really trust it is a problem of the sourse - I see the same with just a terminator on the input of 5922

4)Do you measure the same thing on channel 0 & channel 1?

Good point, forgot to mention it. It happens only on Ch1, Ch0 is clean, behaves as expected.

5)What is the expected amplitude of your sine wave?

You can actually see an envelope of the sine wave, and it is at expected amplitude.This jumping to rails happen independent of the sine wave ampl.

6)What is the result of performing a self calibration on both of these boards?

Yep. 5922 gives an error at self-cal. See attachment. So I just call the NI Support, right?

Thank you, fomine

-Jennifer O.

[Jennifer O]

Yes, I would recommend contacting NI support.   It appears that your ch 1 might be damaged, and NI Support will be able to troubleshoot with you to verify.