SigDigger

SigDigger is a free digital signal analyzer for GNU/Linux and macOS, designed to extract and analyze unknown radio signals in real time using various software-defined radio (SDR) devices through SoapySDR. Its primary use case includes adjustable demodulation of FSK, PSK, and ASK signals, decoding analog video, and analyzing bursty signals. Notable features include a user-friendly GUI, support for multiple plugins for extended functionality, and real-time processing capabilities, making it ideal for radio signal research and experimentation.