[AMRadio] Odd signals in lower 80 meters


D. Chester k4kyv at charter.net
Fri Dec 22 22:49:54 EST 2006


If it is a simple scrambling system that works by inverting the audio - 
making  the lower frequencies come out high and vice versa, they could 
easily be decoded by copying as SSB in the opposite sideband position and 
offsetting the carrier frequency by whatever the tone frequency in the 
inverter is.  When copying in the opposite sideband, that is exactly what 
happens - the lower frequencies come out the highest and vice versa.  The 
audio inverter scramblers were  designed for landline telephone use, and 
maybe for AM or FM radio use.

Don k4kyv 




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