https://cygwin.com/pipermail/cygwin/2003-July/102414.html
#define _POSIX_REALTIME_SIGNALS causes parse error in sys/signal.h
realtime signalsparse errordefineposixcauses
https://www.tek.com/ko/video/how-to/discover-trigger-capture-analyze-your-rf-signals-with-a-realtime-spectrum-analyzer
Discover, Trigger, Capture, Analyze your RF Signals with a Realtime Spectrum Analyzer | Tektronix
This video briefly illustrates how the Tektronix Realtime Spectrum Analyzer (RSA) can be used to discover the hidden secrets on your RF signals, trigger on...