Unknown transmission that originates from Victoria Police Airwing helicopters.
I/Q Raw Recording
—
Audio Sample
Demodulated with AMAmplitude Modulation
The original sample was recorded in Australia, but the same signal was also present on Belgian police helicopters. In Belgium, this signal was present on the open 446 MHzMegaHertz (MHz) 10^6 Hz band, rather than the police UHFUltra High Frequency (300-3000 MHz) band.
Analyzed in SA from an IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. recording