Hilberling PT-8000, Operating Manual

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C–52
Part C Installation And Operation
AGC menu
Picture 71
The AGC (Automatic Gain Control) is active after power on, its hang time is 2
seconds (default value). Manual control of the AGC system is initiated through
the AGC pushbutton located in the cluster FUNCTION.
AGC-LED is off during standard operation.
Pushing AGC will call AGC menu
•
AGC-LED will be on.
•
The AGC softkey menu will be called up:
Select AGC hang time 3 sec
Select AGC hang time 2 sec (default value)
Select AGC hang time 1 sec
Select AGC hang time 500 msec
Select AGC hang time 100 msec
The key toggles between RF-AGC / Audio-AGC (see below)
To prevent missing of weak signals during tuning the MAIN- or SUB-RX AGC
hang time will be always 100 msec.
The AGC-voltage is derived from the RF-signal after it has passed the
channel filters (10.7 MHz). The DSP will narrow the passband – hence out of
(DSP)- filter signals may still derive AGC voltage. This can be annoying
especially during CW operation. The solution is to switch to Audio-AGC.
AGC is derived from the audio to overcome situations described above.
Normal operation is RF-AGC.
Picture 70
RF-AGC
Audio-AGC