Anyone Using NI-SCOPE 3.1 + 5122

[Thomas L.]

Hi ...

I am currently encountering strange effects when using NI-Scope 3.1 with a 5122 (256Mb).

If anyone has the same configuration, would you please mind checking the following:

* Open the example NI Scope EX Multi-Record from the example finder
* Set the setting to lines
* Set the number of records to 2
* Use channel setting: "0:1"
* Perform an acquisition
* Now you should see 4 waveforms, quite neatly aligned

* Now enter the block diagram and there, change 2D DBL to 1D Waveform (the polymorph NI-Scope VI).
* Perform the acquisition
* Does the waveform look the same?

I get three channels which seem to fit, and another one which is constantly zero. Furthermore, the channel which is zero ranges from 0 to 255, wheras the other channels have correct time values.

Thank you for your help.

[psisterhen]

Thomas,

This is a bug in NI-Scope.  When you fetch multiple records from multiple channels at the same time with the 1D WDT VI, the last few records seem to get messed up.  We'll fix the bug for Scope 3.2 (expected next month), which will be available for download.

As a workaround in the meantime, split the fetch into two steps:
  - fetch all the records from channel 0 only
  - fetch all the records from channel 1 only

This won't be substantially less efficient than fetching all channels and records at once.

Alternatively, the other multi-fetch VIs seem to be working fine.  Try the 1D cluster- it contains the same data as the 1D WDT, just different types.

I'm really sorry for the inconvenience.  We'll be investigating this immediately.

Patrick

[Thomas L.]

Ah finally.

I already thought so. I had a SRQ open on this for nearly a week, we tried everything we could think of.

Thank you for your response. At least now I do know it's not my fault.

Thanks for the hint with the 1D Cluster. I'll try it out when I get back to that project.


Thomas Linder