Cisco Cisco 1 GHz GainMaker Amplifier インストールガイド

 

 

7 

 

Upgrading the RF Split in the GainMaker System Amplifier 

 

9  Install the new LPFT in the reverse amplifier board. Be careful, the LPFT pins 

should be inserted into the corresponding holes in the reverse amplifier board, as 
marked with red circle in the illustration below. 

10  Change the split indicator information on the cover to reflect the new split 

configuration by either moving the adhesive dot to the proper designation OR 
remove the dot and use a permanent marker to designate the new configuration. 
You should update the part number label on the module to reflect the new split. 

11  Configure the 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 / Manual setting). 

12  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 amplifier module into the housing. 
2  Secure the amplifier module to the housing by tightening the 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.