Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Technical References

6 

 

OL-31229-01 

 

8  Using a Torx T-10 screwdriver, remove the screws that hold the amplifier board 

in place AND the screw holding the Voltage Regulator in place. 

 

9  Remove the amplifier board. 
10  Install the new amplifier board being careful to use all the screws removed 

earlier and tighten the Torx T-10 screws from 5 to 8 in-lb (0.56 to 0.90 Nm). 

11  Replace the Reverse Amplifier cover. 
12  Configure the RF Amplifier in the same configuration as the one it is intended to 

replace in the field (i.e., same attenuator pads, forward/reverse EQ values, and 
same AGC / Thermal setting). 

13  All S parameters on each port in the forward and reverse band should be verified 

using a network analyzer. 

 

CAUTION: 

Modifying an amplifier's split characteristics will impact the available 
channel lineup downstream from the upgraded amplifier. 

Note: Properly dispose of all parts you remove to protect the environment and to 
avoid their re-use, which could impact network performance. 

Installing the Amplifier Module in the Housing 
1  Insert the upgraded RF amplifier module into the housing. 
2  Secure the amplifier module to the housing by tightening the four module 

retainer screws with a screwdriver from 6 in-lb to 9 in-lb (0.7 Nm to 1.0 Nm).   

3  Inspect the housing gasket and all mating surfaces. Wipe off any excess dirt and 

debris. 

4  Close the housing and finger-tighten all closure bolts. 
5  Use a torque wrench with a ½-inch socket to tighten each closure bolt from 5 ft-lb 

to 12 ft-lb (6.8 Nm to 16.3 Nm) each.