Cisco Cisco 1 GHz GainMaker Amplifier Guía De Instalación
7
Upgrading the RF Split in the GainMaker Line Extender
6 Remove the High Pass Filter Trim using the plastic handle on the component.
7 Install the new High Pass Filter Trim.
8 Remove the Low Pass Filter Trim using the plastic handle on the component.
9 Install the new Low Pass Filter Trim.
10 Remove the Reverse Trim using the plastic handle on the component.
11 Install the new Reverse Trim. Take caution to avoid bending any of the pins on
7 Install the new High Pass Filter Trim.
8 Remove the Low Pass Filter Trim using the plastic handle on the component.
9 Install the new Low Pass Filter Trim.
10 Remove the Reverse Trim using the plastic handle on the component.
11 Install the new Reverse Trim. Take caution to avoid bending any of the pins on
this component during installation.
12 Using a flat-head screwdriver or cross screwdriver, replace the diplexer covers
and tighten the diplexer cover screws from 5.3 in-lb to 7.1 in-lb (0.6 Nm to 0.8
Nm).
Nm).
Important: Install the diplexer cover properly, or RF signal degradation may
result.
result.
13 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.
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.
14 Configure the line extender 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).
same AGC / Thermal / Manual setting).
15 All S parameters on each port in the forward and reverse band should be verified
using a network analyzer.
CAUTION:
Modifying a line extender's split characteristics will impact the available
channel lineup downstream from the upgraded line extender.
Modifying a line extender's split characteristics will impact the available
channel lineup downstream from the upgraded line extender.
Note: Properly dispose of all parts you remove to protect the environment
and to avoid their re-use, which could impact network performance.
and to avoid their re-use, which could impact network performance.
Installing the Line Extender Module in the Housing
1 Insert the upgraded line extender module into the housing.
2 Secure the line extender module to the housing by tightening the module retainer
1 Insert the upgraded line extender module into the housing.
2 Secure the line extender 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
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).
6 Follow the numbered tightening sequence to tighten the closure bolts.