Specifications

5‐1
888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.
Copyright©2013,HarrisBroadcast
Maxiva UAX
October 17, 2013
Section-5 Maintenance
5
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