Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split Installation Guide

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Chapter 2    Theory of Operation 
 
 
 
44 
OL-29643-02 
4x3-1,3,4 Reverse Configuration Module with Auxiliary Reverse RF 
Injection Description 
The 4x3-1,3,4 Reverse Configuration Module with auxiliary reverse RF injection 
combines reverse inputs from Ports 1 and 2/3 and routes them to Transmitter 1; it 
also routes reverse inputs from Port 4 to Transmitter 3 and from Ports 5/6 to 
Transmitter 4. An RF signal from an external source can optionally be injected at 
Ports 3/6 and coupled with the reverse RF inputs from Ports 2/3 and 1 and routed 
to Transmitter 1. 
The following diagram shows how this module functions. 
 
 
 
4x4 Reverse Configuration Module with Auxiliary Reverse RF Injection 
Description 
The 4x4 Reverse Configuration Module with auxiliary reverse RF injection routes 
reverse inputs from Port 1 to Transmitter 1, from Port 2/3 to Transmitter 2, from 
Port 4 to Transmitter 3, and from Port 5/6 to Transmitter 4. An RF signal from an 
external source can optionally be injected and coupled with reverse RF inputs from 
Ports 3/6 and routed to Transmitter 1. 
Note: This module is typically installed when using bdr multiplexing digital reverse 
modules. Since the digital reverse module occupies the physical space that 
transmitters 3 and 4 normally occupy in the node base, this reverse configuration 
module is typically used with a 6-port optical interface board. 
The following diagram shows how this module functions.