How to implement VBW in PXIe-5665

[denshie]

Hello Master's of LabVIEW!

Currently I am doing a project which involves PXIe-5665. My task is to make a driver for this module and attached some dataloggin functions. I already done most of the functions (thanks to RF Demo Panel example), however, I need to implement VBW settings, which I cannot find. 

Does anyone here done VI for VBW setting?

Thanks in advance! 

Dennis

[shawn.t]

The PXIe-5665 is an FFT based analyzer and therefore doesn't actually have a real VBW setting.  Video bandwidth is a hold-over concept from swept-tuned analyzers where a filter would be applied to smooth out the spectrum on the display.  I believe that most digital analyzers made today use a digital filter to represent VBW.  You can accomplish a similar thing in RFSA by adjusting the averaging settings.

Here's a link to some information about video bandwidth: VBW on Wikipedia

[Matt_K · Accepted solution]

Hi Denshie,

You can find an example for VBW at the following link:

NI-RFSA Soft Front Panel Measurement Examples
https://decibel.ni.com/content/docs/DOC-22813

Also, if you are interested in more details on the emulation of VBW on the PXIe-5665, you can check out the following link:

Emulating Video Bandwidth and Detectors in an FFT-based Vector Signal Analyzer

http://www.ni.com/white-paper/13869/en/

[denshie]

Hello MAtt_K,

Thanks for this! It is very helpful. 

Regards,

Dennis