Cisco GS7000, Installation And Operation Manual

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Chapter 4 Setup and Operation
98
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...