Week 1: Basics of radio signals, modulation types, and antennas. Hands-on: set up an RTL-SDR and view FM broadcast waterfall. Week 2: Demodulation techniques (FM/AM/SSB), audio processing basics. Hands-on: demodulate local FM and decode RDS. Week 3: IQ sampling, sample rates, and SDR tools (GQRX, SDR#). Hands-on: record IQ files. Week 4: Intro to digital voice codecs (AMBE, MELPe, Codec2) and vocoder basics. Hands-on: decode Codec2 streams. Week 5: Trunking theory and protocols (P25, DMR, NXDN). Hands-on: capture and identify control channel traffic. Week 6: Use a professional decoder (trial/demo) to decode live trunking and log talkgroups. Hands-on: export logs and audio. Week 7: Advanced analysis—error correction, interleaving, and spectrogram interpretation. Hands-on: analyze weak-signal decodes. Week 8: Ethics, legal boundaries, and a capstone project: monitor a local non-sensitive channel, produce a report with timestamps and summaries.
: FX2K cannot decrypt encrypted traffic. It only decodes unencrypted digital voice. Attempting to break encryption is illegal in most jurisdictions. fx2k radio decoder professional