Specifications

TABLE OF CONTENTS
Section I
Introduction/Specifications
ScopeandPurpose................................1-1
EquipmentDescription.............................1-2
BlockDiagram ................................... 1-2
AvailableOptions.................................1-2
Section II
Initial Turn-On
InitialPowerOn..................................2-1
FrequencyChange ................................ 2-1
LowPowerTune..................................2-1
MediumPowerCheck .............................2-1
HighPowerTune.................................2-2
AntennaVSWRNull .............................. 2-2
RecordingNormalMeterReadings................... 2-2
Section III
Operators Guide
Introduction......................................3-1
OperatingProcedures..............................3-1
DailyPreoperationalCheckout.......................3-1
TransmitterTurn-OnProcedure......................3-1
TransmitterTurn-OffProcedure......................3-2
TransmitterOperations.............................3-2
Section IIIA
Controls and Indicators
Section IV
Overall System Theory
Introduction......................................4-1
BlockDiagramDescription ......................... 4-1
ProtectionOfPersonnel............................4-7
TransmitterProtection .............................4-8
RFCircuitsInTheTransmitter ...................... 4-8
TransmitterACPowerCircuits.....................4-11
DriveMultimeter................................. 4-16
ControlMultimeter...............................4-18
Section V
Maintenance/Alignments
Introduction......................................5-1
FrequencyChangeProcedures.......................5-1
Maintenance .....................................5-1
PreventiveMaintenance............................ 5-2
Section VI
Troubleshooting
Introduction......................................6-1
MakingSafeMeasurements.........................6-1
Troubleshooting Control Front Panel Indicators Faults . . . 6-1
Troubleshooting Faults In The RF Chain ..............6-2
Troubleshooting Frequency Control Panel Faults .......6-13
Troubleshooting Faults on the Power Supply Status
Panel..........................................6-18
System Faults With No Indication On The Front
Panel..........................................6-19
Troubleshooting Low Voltage Supplies...............6-20
MeasuringRFDriveLevelAndPhase............... 6-22
MeasuringRFDrainWaveformAndPhase...........6-22
Section VIA
Emergency Operating Procedures
Introduction ..................................... 6-1
RFSystemBypassing............................. 6-1
Audio/DigitalModulationSystemBypassing .......... 6-2
FrequencyControlBypassing....................... 6-3
SECTION VII
PARTS LIST
Section A
Synthesizer Interface
Introduction ..................................... A-1
Function........................................ A-1
OscilloscopeWaveformPlots....................... A-1
Location........................................ A-1
BlockDiagramDescription......................... A-1
DetailedCircuitDescription........................ A-2
Troubleshooting .................................. A-6
Removal\Replacement............................. A-7
Alignment....................................... A-7
Section B
RF Interface
Introduction ..................................... B-1
Function........................................ B-1
OscilloscopeWaveformPlots....................... B-1
Location........................................ B-1
BlockDiagramDescription......................... B-1
DetailedCircuitDescription........................ B-2
RF Interface Troubleshooting ....................... B-3
Removal\Replacement............................. B-4
Alignment....................................... B-4
Section C
Driver Combiner Motherboard (A5)
Introduction ..................................... C-1
Function........................................ C-1
Location........................................ C-1
DetailedCircuitDescription........................ C-1
Troubleshooting .................................. C-2
Driver Combiner Motherboard Removal/Replacement . . . C-5
BufferAmplifier(A4)............................. C-7
Predriver,PD1.................................. C-12
Drivers,D1throughD14.......................... C-14
Section D
Predriver Tuning Board
Introduction ..................................... D-1
Function........................................ D-1
Location........................................ D-1
DetailedCircuitDescription........................ D-1
Predriver Tuning Board Troubleshooting.............. D-1
Removal\Replacement............................. D-2
Alignment....................................... D-2
Section E
Driver Encoder (A7)
Introduction ..................................... E-1
Function........................................ E-1
OscilloscopeWaveformPlots....................... E-1
iii 888-2339-002
WARNING: Disconnect primary power prior to servicing.