Signals Intelligence for Regular Folk – Part 2, by Tunnel Rabbit
(Continued from Part 1. This concludes the article.) A $20 SDR-UTL dongle can cover 1.8MHz to 1.2 GHz, and see and hear the entire 220MHz Ham band, or the entire spectrum with the right software. Yet who would use precious power to monitor a band with no traffic on it anyway? The more expensive Dongle covers most everything else including frequencies that drones would use… With the $20 dongle, a poor man’s frequency analyzer, one can see weak transmissions even though they cannot hear them. And one can spot spurious transmissions, secondary harmonics, that can lead to the identification of …