TOOLS
https://github.com/miek/inspectrum
https://manpages.debian.org/testing/gr-osmosdr/osmocom_fft.1.en.html
https://www.gnuradio.org/blog/2016-11-04-reverse-engineering-outernet/
https://www.youtube.com/watch?v=kuubkTDAxwA&list=PLlKjreY6G-1EKKBs9sucMdk8PwzcFuIPB
https://www.youtube.com/watch?v=e7NnVeaRfc8&list=PLCwnLq3tOElpXe1HqK6m-wVDCsqyBNhlb
http://hackers-arise.com/sdr-for-hackers