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5‐1

888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.

Maxiva UAX

October 17, 2013

Section-5 Maintenance

5.1 MaintenancePhilosophy

ThissectioncontainsthemaintenanceandalignmentproceduresfortheMaxivaUAXSeriesUHFtransmitter.This

includesroutinemai ntenance,PAmodulereplacement,PAmodulerepair,transmittercalibrationandPCboard

replacementprocedures.TheMaxivaUAXtransmitterisdesignedtobeeasilymaintainedinthefield.Theuseof

modularconstructionwithfunct

ionalplug‐inmodulesallowstechnicianstoisolateandreplaceadefectivemodule

quicklyandwith minimaldowntime.

Caution

THE SERVICE WORK DESCRIBED IN THIS SECTION MUST BE CARRIED

OUT BY TRAINED STAFF ONLY.

RepairworkrequiringknowledgeoftheinternalworkingsoftheLPU,TCU,PAmodules,orPSmodulesmustbe

carriedoutinservicecentersauthorizedbyHarris,seepageiiiandivforserviceinformation.

Pleasevisi

ttheHarrisBroadcastCustomerPortalathttp://support.broadcast.harris.comtofindadditionalproduct

information.

5.2 PerformingaFunctionalCheck

Toverifythatthetransmitterisfunctioningproperly,checkthefrontpanelLEDs.Ifproblems(redLEDs)are

encountered,checktheLPULCDscreenfaultlog(STATUS>FAULTLOG).RefertoSection6foralistingofpossible

faultsandindications.

5.3 ChangingOperationalCharacteristics

5.3.1 ChangingtheFrequency

Thisproceduredescribesmanuallychangingthechannelfrequencytoanewvaluefortheveryfirsttime.Itis

recommendedthatthetransmitterLPUoperationalsettingsontheoriginalchannelbesavedusingtheLPUEXCITER

HOME>SETUP>ISP>SAVESETTINGSwebbrowserscreenbeforeproceedingwithafr

equencychange.Once

operationonthenewfrequencyhasbeenestablished,asecondsetofsettingsshouldalsobesaved.Thiswillgreatly

facilitatechangingbetweenfrequenciesinthefuturebysimplyloadingthedesiredpreferencesfile.

EquipmentandTo

olsRequired:

• SpectrumAnalyzer

• NetworkAnalyzer(adjustmentofoutputfilter)

• Directionalcouplerandaveragepowermeterorotherprecisionpowermeasurementmeans

Caution

THE COAXIAL DIRECTIONAL COUPLERS TYPICALLY SUPPLIED WITH UAX

TRANSMITTERS ARE NOT COMPENSATED VERSUS FREQUENCY. THAT IS,

THEY WILL EXPERIENCE A MONOTONIC RISE IN COUPLING VALUE

ACROSS BAND III. ACCORDINGLY, ANY COUPLING VALUES WRITTEN ON

TEST MEASUREMENT PORTS MAY NOT BE APPLICABLE TO A NEW

OPERATING FREQUENCY. CONSULT TRANSMITTER FACTORY TEST DATA

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Sharp SD-AT1000W Spécifications Page 181