rfsa fetchIQ blank waveform after 1000 samples

[nickparla]

Hi,

I am trying ASK demodulation after fetching a modulated wave by NI RFSA Fetch IQ vi. I have the PXI 5600 for this. As the attachments show, with the values provided, I get only around 1000 samples of data before the fetch stops and restarts. I need 53.3 ms worth data but get only about 30ms. I dont understand whether the acquisition rate is wrong or the fetch is not able to acquire more than the 1000 samples shown. 

I am quite new to both Labview and RF and there might be a simpler cause to all this that I dont understand. Any help will be appreciated. Thanks

[Air_Frantz]

Hey Nick,

There is a 'RFSA Configure Number of Samples.vi' which you should be able to use to control how many samples are in each record.  I believe I can see this vi at the very left of your first screenshot.

I also want to mention that this question would be better suited to the RF discussion board, as the LabVIEW software group is mostly for basic questions about LabVIEW that do not involve specific hardware drivers:

http://forums.ni.com/t5/RF-Measurement-Devices/bd-p/290

I recommend opening up a few other shipping examples in order to get a feel for what the different configuration vi's do and when to use them.

Jon F.

[nickparla]

Hi Jon,

Thanks for the answer. I just found that out today morning. The number of samples was set to 1000 samples by default. I increased the number which solved the issue.