Power Spectrum with RFSA

[I_Zi]

Hi all,

I have some question about fetching power spectrum with RFSA drivers.

when i set span and resolution bandwidth as 100M and 1M respective in ni5660 Configure for Spectrum,and use ni5660 Read Averaged Power Spectrum to fetch the power spectrum,does averaged power spectrum output the 100M signal once?

if so,how can i draw the spectrum in Waveform Chart as RFSA demo show us?RFSA demo did use Waveform Chart to draw spectrum,did't it?

Thanks

Liu Yuan

[Benjamin Cook]

Hello Liu Yuan,

If you take a look at ni5660 Power in Band example in the LabView Example Finder ( Help -> Find Examples ), you will notice it uses a Waveform Graph.  The Read Averaged Power Spectrum vi is contained within a while loop which means that it will continuously output the averaged power spectrum.  If you want to use the RFSA drivers, I suggest looking at the RFSA Getting Started Spectrum example in the example finder.  This example only reads the spectrum once, but you could put a while loop around the read vi to get continuous spectrum output.  If you have any more questions feel free to post back.

Regards,

Benjamin Cook