Combines full spectrum analysis with digital mapping (OpenStreetMap), GPS location tracking and signal-strength vectoring to pinpoint EMI/RFI, rogue transmitters, adjacent-channel interference and dead spots – built for interference hunters. Adds field strength, FM demodulation, GNSS signal quality (CNR loss) and spectrum masking; the SH-75S-AOA further adds AM/FM demodulation, digital mod check, I/Q modulation check and time-slot/gate scanning.