Thanks for the info. Just to be clear, in simple terms, the temperature causes the change in cable, which changes the input levels, which the AGC monitors and then adds or subtracts gain. Then if input levels were to change on the pilot for another reason, logically the AGC would attempt to make up the difference even if it was not temp. related OR is there a thermal measurement made along with the monitoring of input levels? In other words, hypothetically if ch 61 is the pilot, and the HE levels on ch61 are adjusted a few dbmv lower, then all the AGC's are compensating and therefore all have to be reset before colder temps? This is not a real situation, I am just trying to grasp the basic funtion. Thanks again everybody!
> An AGC control monitors the fluctuations in DC voltages on the specific pilot channel, which relate to DBMV changes to the input level on the pilot channel. This in turn drives the Bode circuit which is basically a variable slope and gain control that makes adjustments to all channels across the band. From a simplistic view the AGC makes up for input changes to the amp that are caused by changes in temperature, as the input cable will in fact stretch (lengthen) or contract(shorten) with the effects of temperature. the rule of thumb is a 1% change in impedance for every 10 degrees F. change in temperature. So set it properly or you will find yourself outside the operating window of the control
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> > Does a typical AGC adjust levels by monitoring temperature around the module or input levels to the amplifier?
Re: AGC ???
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