Gain
Adjust
@
After being filtered, the IF signal is applied to common-emitter amplifier Q6 which has
adjustable gain. IF Gain adjustment
Rl
can be adjusted to provide from 5 dB to 20 dB of
gain. This is used to adjust the level of the IF signal to the proper level for comparison to the
20/30
signal in the
AllA
YTO Phase Detector.
Output
Amplifier
@
The IF signal is further amplified by output amplifier Q5 and
Ql.
Gain is approximately
21 dB. This provides the proper level signal to drive the
AllA
YTO Phase Detector.
2
AllA