Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split 安装指南
Forward Path Setup Procedure
63
6 Set the receiver module attenuator switch as follows:
IF received optical power is...
THEN set the attenuator
switch to...
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
-8 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.
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
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...
all have equal output levels
1X segmentation
Go to step 9.
be driven at different levels
1X segmentation
Go to step 10.