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Old 12-15-2005, 10:57 AM
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CrashGaalaas
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Default RE: Intermediate frequency, Question?

The first IF is 10.7 mHz which is obtained by mixing either 61.530 mHz or 82.930 mHz ( I don't know which) with the incoming channel 22 frequency 72.230 mHz.

The second IF is 455 kHz which is obtained by mixing either 10.245 mHz or 11.155 mHz (again I don't know which) with the 10.700 mHz first IF.

I don't think either of these mixes determines positive or negative shift. I believe the positive/negative shift is part of how the signal is modulated.

Guess its time to disect a receiver and see what really is going on in there.