BW in FM Demodulation using PXI-5660

[aborna]

In FM Demodulation (Labview) using PXI-5660, what is the BW? is it the filter after down-converter (PXI-5600)? or is it a software defined filter after digitizer (5620)?

Thanks,

[Robert_F]

Hello Aborna,

The PXI-5600 is always going to send data to the PXI-5620 with a Bandwidth of 20MHz, which will be centered at 15MHz on the PXI-5620. (This down conversion is done through hardware and not software.)  The Bandwidth that can be configured is done on the PXI-5620.  If the Bandwidth is below 1.25MHz, then the PXI-5620 is capable of On-Board Signal Processing (OSP).  If the Bandwidth is above 1.25MHz, then all the processing is done through software.   If the OSP is converting the data to I&Q data on the PXI-5620 (Bandwidth less then 1.25MHz), then the Bandwidth is set by the Bandpass filter.  This filter is after the PXI-5600 and before the PXI-5620 OSP.

Message Edited by Robert F on 10-22-2007 11:05 AM