User Guide

RH-27

Troubleshooting - RF (Part 2) CCS Technical Documentation

Contents

Page No

Synthesizer Troubleshooting.......................................................................................... 3

Synthesizer Setup Using Phoenix ................................................................................4

VCTCXO Troubleshooting .........................................................................................4

UHF Synthesizer Troubleshooting ..............................................................................6

UHF Synthesizer Schematic ........................................................................................7

UHF Synthesizer Layout .............................................................................................7

UHF Frequency is Incorrect...................................................................................... 7

RX VHF (Batman LO) Schematic ...............................................................................8

RX VHF Layout ........................................................................................................9

Incorrect RX VHF Frequency................................................................................... 9

TX VHF Schematic .....................................................................................................9

TX VHF Layout .........................................................................................................10

Incorrect TX VHF Frequency ................................................................................. 10

TX Troubleshooting..................................................................................................... 11

Transmitter Schematic 1 ............................................................................................12

Transmitter Schematic 2 ............................................................................................12

TX Troubleshooting Using Phoenix ..........................................................................13

PCS Band TX Probe Points .......................................................................................15

Cell and AMPS Band TX Probe Points .....................................................................16

TX AMPS Troubleshooting Using Phoenix ..............................................................17

RX Troubleshooting..................................................................................................... 17

Receiver Schematic ...................................................................................................18

Turning on Rx Path Using Phoenix ...........................................................................18

Switching Rx Gain States Using Phoenix .................................................................19

Receiver IF Troubleshooting Layout .........................................................................21

Receiver RF Troubleshooting Layout .......................................................................22

Receiver DC Troubleshooting Layout .......................................................................23

Receiver DC Troubleshooting Layout .......................................................................24

Measure Logic Levels for Rx Front End (N750) .................................................... 24

Alfred Receiver Troubleshooting ..............................................................................25

Things to Keep in Mind: ......................................................................................... 25

Receiver DC Troubleshooting Alfred ........................................................................26

Control Signals at RF-BB Interface ...........................................................................26

Back Panel Control Signals RF-BB Interface ...........................................................27