Cisco GS7000 - Page 118

Chapter 4 Setup and Operation
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6 Set the receiver module attenuator switch as follows:
IF received optical power is...
THEN set the attenuator
switch to...
Standard Receiver
—2 to +2 dBm
-8 dB
-6 to -2 dBm
0 dB
Low Input Receiver
-6 to -2 dBm
-8 dB
-10 to -6 dBm
0 dB
7 For standard input receiver, check the RF level at the -20 dB RF test point on each
forward path receiver. Signal level should be +7 dBmV at the test point with 0
dBm optical input power and 2.5% index modulation of the laser headend
transmitter. (With optical receiver attenuator set to the -8 dB switch setting.) This
represents an optical receiver output of +27 dBmV. For low input receiver follow
the same process to check the RF level and refer the table below.
For standard receiver
For low input receiver
Att/OMI
Output level
27dBmV
27dBmV
8 dB/2.5%
Input optical
power
0dBm
-4dBm
8 dB/2.5%
8 The next step depends on your RF output levels.
IF your RF output ports will...
and you have...
THEN...