Chapter 4 Gain Control - Foxcom Sat-Light 7226H Installation And User Manual

4 Gain Control
The 7226H 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
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.
7226H Interfacility Link Installation and User's Guide
Foxcom proprietary information
on page15.
page 27