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Re: [Discuss-gnuradio] Resending a strange demodulated signal

From: Hans Van Ingelgom
Subject: Re: [Discuss-gnuradio] Resending a strange demodulated signal
Date: Tue, 8 Dec 2015 17:28:40 +0100

Yes I've seen something like this. It is used with NOAA weather satellites, and the system is called APT there.


"The signal itself is a 256-level amplitude modulated 2400Hz subcarrier, which is then frequency modulated onto the 137 MHz-band RF carrier. Maximum subcarrier modulation is 87% (±5%), and overall RF bandwidth is 34 kHz."

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