122 9 November 2001 Transmitters
Using the Factory-Set AGC Function
NOTE
Do not use AGC when proofing transmitters that operate
with CW carriers.
The AGC reference level is factory-set for modulated carriers. For
constant wave (CW) carriers, the AGC detected power is
2.0 dB higher, and the AGC adjusts the RF drive downward
to compensate. This causes the C/N of the link to be 2.0 dB
lower, so you should not use AGC when proofing
transmitters that operate with CW carriers.
AGC automatically adjusts
the RF drive level to match
the factory-set AGC reference
level, not a manually set RF
drive level. The 800E-TX and
800G-TX transmitters offer
customer-adjustable AGC
settings.
Set the transmitter for AGC mode as follows:
1. Toggle the AGC/MAN switch up for AGC.
2. Check the condition of the AGC LED:
If the AGC LED is green, the RF drive level to the trans-
mitter has been adjusted to match the factory-set AGC
reference level.
If the AGC LED is red, the RF drive level is outside the
± 3 dB adjustment window. Turn the activation key to off
and go back to “Connecting the RF Signal” on page 113
to recheck the RF signal level entering the transmitter.
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