Re: [Discuss-gnuradio] Spectral Survey with GRC?

[Marcus D. Leech]

On 03/02/2016 09:02 AM, Bruce E. Kahn wrote:
> Hi GRC companions
>
> Has anyone used GRC to acquire a large range RF spectral survey? 
> Basically, step from range to range, and save the output in a (text) 
> file. I would like to be able to average each frequency/range for some 
> (variable) period of time, or do peak hold, much like some of the nice 
> FFT sinks do. I have been doing this in Python with a modification of 
> osmocom_spectrum_sense, but I would rather use GRC since it is more 
> intuitive. I just need a starting point, and particularly how to save 
> to file, and time average. This seems like it would be pretty 
> straightforward, but I haven't seen it done anywhere (with GRC).
>
> A little background. I am working on a research project on ambient RF 
> energy harvesting (using printed metamaterial antennas). I recently 
> got a HackRF One to help understand the ambient RF energy present and 
> correlate it with energy harvesting performance.
>
> Thanks in advance!
There have been various of these over the years.    Most recently, I put 
together a scanner type application for scanning filters.  This
  might be a good starting point:

http://www.sbrac.org/files/filter_scan.grc
http://www.sbrac.org/files/scanning.py

This takes ruthless advantage of the newest "Python Module" block in 
GRC, which is a more-convenient way to integrate "helper"
  python code into .grc flowgraphs.

Cheers