Foxcom SATLIGHT 7225H, Installation And User Manual

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7225H Interfacility Link Installation and User’s Guide page 27
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4 Gain Control
The 7225H IFL unit requires no maintenance, but the user can
adjust the transmitter and receiver gain by 20 dB. The gain can be
between 0 to -20 dB.
All internal adjustments have been set up at the factory; the only
user adjustments are input and output RF signal levels accessible
from the front panel and described in the following sections. A
detailed procedure for optimizing the gain control is provided in
section
2.7 Aligning the Fiber Optic Link
on page15 .
If you do not have a signal generator or spectrum analyzer, adjust
the gain according to the following procedure.
To adjust the Transmitter Gain:
1. Set the input power to the expected power level.
2. Set the nominal RSSI signal at 3.5 V ± 0.5.
To adjust the Receiver Gain:
1. Set the input power to the expected power level.
2. Set the nominal RSSI signal at 5.0 V ± 2.