Sharp SD-AT1000W Spezifikationen PDF herunterladen (Seite 57)

Maxiva UAX

October 17, 2013

2‐15

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

ofrushingairfromthe50VDCfansonthePABchassisreardoor(s).Monitor

reflectedpowerasRFoutputpowershouldrampupfromzero.

Note

The transmitter has already been adjusted to the desired operating frequency and power during final fac-

tory test. If a mask filter is provided inside the transmitter rack, it will also have been tuned and tested on

chan

nel at full power.

STEP 13

ReadtransmitteroutputpowerfromPOWERscreenonLPU.Refertosection

"5.2Pe

rformingaFunctionalCheck"onpage5‐1andperformafunctional

check.Iffullpo

werisnotachievedrefertosection"5.3.2Changingthe

OutputPo

werLevel"onpage5‐4ofthismanual.Viewactivefaultentriesin

theac

tiveLPUfaultlog(s)andseeSection‐6Diagnosticsformore

information.

STEP 14 Allowthetransmittertowarmupatfullpowerforthirtyminutes.

STEP 15 Checkthetransmittedsignalquality.

Ifadigitalmodulationformatisbeingtransmitted,measurethesuppressionofadjacentchannelIMDsidebands

(shoulders)withaspectrumanalyzer.Consult"5.5Pr

e‐correctionforDigitalTV"onpage5‐15formoredetails.

Ifananalogmodula

tionformatisbeingtransmitted,measuresyncamplitude,testlinefrequencyresponse,and

othercommonvideoparameterswithawaveformmonitor.MeasureIMDbeatproductsuppressionwithaspectrum

analyzer.Consult"5.7Pr

e‐correctionforAnalogTV"onpage5‐33formoredetails.

STEP 16

Oncetheproperfunctioningofthetransmitterhasbeenverified,proceedto

installanyrequiredremotecontrolconnections.Consult"2.12P

arallel

RemoteCo

ntrolInstallation"onpage2‐16formoredetails.

STEP 17 Placethetransmitterin‘remote’modeattheLPUfrontpanel(orTCUfront

panelfordualdrivesystems)toactivateallremotecontrolconnections.

STEP 18 Verifythecorrectfunctioningofanyremotecontrolsystems.

2.11 BatteryBackupActivation

LPUsthatshipwiththeoptionalbatterybackup(15minuteUPS)systeminstalledwillhaveaconnector/jumper

installedontheTxInterfaceconnectorontheLPUchassisrearpanel.

Figure 2-10 Battery Backup (UPS) Jumper

Oncethet

ransmitterhasbeenplacedintoservicethebatterybackupconnector/jumpercanberemovedtoactivate

theLPUbatterybackup(UPS)system.Retaintheconnector/jumperforfutureuseshouldthetransmitterbeplaced

instorageorshippedtoanotherlocation.

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Sharp SD-AT1000W Spezifikationen Seite 57

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