Harris Gates Two 994 9203 002 - Table of Contents

TABLE OF CONTENTS
SECTION I
GENERAL INFORMATION
Introduction......................................1-1
ScopeAndPurpose..............................1-1
Specifications....................................1-1
SECTION II
INSTALLATION/OPERATION
Introduction......................................2-1
Unpacking.......................................2-1
ReturnsandExchanges.............................2-1
GeneralInstallationInformation .....................2-1
Power Distribution for Optimum Transmitter Perform-
ance .........................................2-1
OverheatingfromLineUnbalance..............2-1
TransmitterNoisePerformance ................2-1
TheCausesofLineUnbalance.................2-1
ThreePhaseDeltaDistributionTransformers.....2-2
ThreePhaseWyeDistributionTransformers......2-2
General Installation
Requirements ...................................2-2
EquipmentPlacement............................2-2
Pre-InstallationInspection ........................2-2
EquipmentPositioning...........................2-3
Ground Strap Installation .........................2-3
ElectricalInstallation ..............................2-3
PowerRequirements.............................2-3
Procedure. .................................2-3
RFOutputConnection...........................2-4
BatteryInstallation..............................2-4
Audio Input .................................... 2-4
RemoteControl.................................2-4
AirflowSensorStatus............................ 2-5
FailsafeConnection..............................2-5
Modulation Monitor Sample ......................2-5
InitialTurnOnProcedure...........................2-5
InitialTurnOn .................................2-5
Modulation Monitor Carrier Level..................2-6
ApplicationofAudio ............................2-7
RemoteMeterCalibration ........................2-7
SECTION III
MAINTENANCE
Introduction......................................3-1
StationRecords...................................3-1
Maintenance Logbook ...........................3-1
PreventiveMaintenance............................3-1
Maintenance Of Components......................3-1
AirSystem.....................................3-2
GATES Series™ Top Removal
Procedure ....................................3-2
LowVoltageSupplyAdjustment...................3-2
High Voltage Supply Adjustment .................. 3-4
RFDriveMeasurement...........................3-4
IPATuning....................................3-5
PAVoltageElectricalZero .......................3-5
PAVoltMeterCalibration........................3-5
PACurrentCalibration...........................3-5
Power Supply Current Calibration..................3-5
PowerOutputCalibration........................ 3-5
OverloadAdjustmentProcedures.................. 3-6
Power Supply Current Overload ............... 3-6
UnderdriveFault............................ 3-6
VSWRDetector............................ 3-6
Replacing Boards and
ReplacingBoardComponents ..................... 3-6
SECTION IV
TROUBLESHOOTING
Introduction..................................... 4-1
Definition of
FrontPanelIndicators ............................ 4-1
Symptom: Transmitter Will Not Turn On - None of
the Green LED’s on the Power Level Switches are Il-
luminated....................................... 4-1
PossibleCauses................................ 4-1
LossofACPower.......................... 4-1
ControlSupplyFailure....................... 4-1
Symptom: Green Power Level Status LED’s Illumi-
nate, but the Primary Contactors Do Not Energize and
NoOverloadLED’sIlluminate..................... 4-1
PossibleCauses................................ 4-1
Phase Monitor (3∅ FIVEonly)................ 4-1
Blownfuse................................ 4-1
OpenInterlock............................. 4-1
FailsafeInterlockOpen...................... 4-1
InterfaceboardOutput....................... 4-1
OpenContactorCircuit ...................... 4-1
ContactorControlSignal..................... 4-1
Symptom: One or Both Primary Contactors Energize,
ButThereIsNoPowerOutput..................... 4-1
HighVoltageSupplyFailure...................... 4-1
Symptom: High Voltage Is Present, But There Is No
PowerOutput................................... 4-2
PDMKillCondition ............................ 4-2
PDMLevel.................................... 4-2
PossibleCausesForOverloads...................... 4-2
Supply Voltage Overload ........................ 4-2
Supply Voltage Too High .................... 4-2
Power Supply Current Overloads- At Turn On ....... 4-2
Supply Short............................... 4-2
Power Supply Current Overloads, Continuous Cycling
andAutomaticCutback......................... 4-2
PDMSystemProblem....................... 4-2
PDMGeneratorOutputsHigh................. 4-2
PDMAmplifierShorts....................... 4-2
Supply Current Calibration ................... 4-2
Random Supply Current Overloads With Modulation. . 4-2
Sub-audibleSignals......................... 4-2
UnderdriveFault ............................... 4-2
Low/NoDrive.............................. 4-2
IPAandPATransistors...................... 4-2
VSWR Overload- Continuous VSWR Cycling ....... 4-2
BadLoadImpedance........................ 4-2
AntennaProblem........................... 4-3
OutputNetwork............................ 4-3
viii 888-2314-001 Rev. X
WARNING: Disconnect primary power prior to servicing.