Spectrum analyzer from a CC1350 launchpad

A new upgrade made it show persistent peaks, very useful for detecting frequency hoppers.  As always, it continued the minimal 80's interface.  Restart the program to clear the history.

For scanning a frequency hopper, you'd want a small number of RSSI readings like 50 & a frequency step matching the standard so the scans hit the exact frequencies where signals are expected.  Of course, this doesn't show if the frequency hopper is hitting the exact frequencies.