Rf Amplifier Module - Cisco GS7000 Installation And Operation Manual

Chapter 2 Theory of Operation

RF Amplifier Module

Introduction
This section describes the RF amplifier module. The RF amplifier module contains
the forward band and the reverse band amplifiers.
Functional Diagrams
The following diagrams show how the RF amplifier functions.
Surge
Protection
Fwd. TP
Port 1 High
Low
AC
Rev. TP
Fwd. TP
Node Signal
AC
Port 2
Director
Jumper
Rev. TP
Fwd. TP
AC
Port 3
Aux. Reverse
Rev. TP
Injection
Director
Field Accessable
Split Upgrade
Field Accessable
Plug-In
Factory
Plug-In
24
4 Way Forward Segmentable Launch Amplifier Module
AC 1
Power
Output Interstage
RF
GaN GaAs
Switch
Gain Block Gain Block
EQ Pad Pad
A
Pad
Output
GaN
Gain Block
High EQ Pad
Low
Interstage
GaAs
Pad B
Gain Block
High
Low
210 MHz Aux.
Reverse Injection
Pad C
Option
Digital
Control
1.2GHz GS7000 Node
Trim
Pad Pad Trim
Ther Ther
DC
DC
J G
Switch
Switch
Pre
Amp
RF RF
Switch Switch
Tilt Tilt
Pad Pad
Ther Ther
Trim Trim
Pre Pre
J
Amp Amp G
Forward Configuration
Module
R4 R3 R2 R1
Forward Input
AC 2
Power
Interstage Output
RF
GaAs GaN
Switch
Gain Block Gain Block
Pad Pad EQ
Pad
D
Output
Node Signal
GaN
Director
Gain Block
High
Pad EQ
Low
Interstage
GaAs
E Pad
Gain Block
210 MHz Aux.
Reverse Injection
F Pad
Option
Digital
Control
Surge
Protection
Fwd. TP
High Port 4
Low
AC
Rev. TP
Fwd. TP
AC
Port 5
Splitter
Rev. TP
Fwd. TP
AC
Port 6
Aux. Reverse
Rev. TP
Injection
Director