Sharp SD-AT1000W Spécifications télécharger pdf (Page 111)

Maxiva UAX

October 17, 2013

3‐43

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

3.7.10 SetupScreens‐ISDB‐TModulation

Figure 3-41 LPU ISDB-T Setup Screen 1

Table3‐30XmtrHome>ExciterHome>Setup>ISDB‐TModulator(screen1)

Fields Explanation

PowerOnInput Theselectedinput,ASI1orASI2,becomestheactiveinputwhentheexciterispoweredup.

AuxiliaryInput

ChoicesareNoorYes.

Ifyesisselectedtheexcitercanbemadetoswitchtoanauxiliary inputiftheactiveinputfaults

ordropsout.

ActiveInput Thes

electedinput,ASI1orASI2,istheactiveinput.

StreamLock ChoicesareGPSandStreamRate.

SwitchingMode

ChoicesareAutomaticorManualswitchingoftheASITransportstream.

IftheASIswitchmodeisinAutomaticandthecurrentASIstreamhasanissue,ordropsout,

thesystemwi

llswitchtotheAuxi liary ASIstreamifitisavailableandgood.

RaisedCosineWindow

ThisentryenablesRaisedCosineWindowshapingbetweenOFDMsymbolstoreduceout‐of‐

banddistortion.UpanddownarrowsallowtheselectionofBypass,Min(minimum),Med

(medium),orMax(maximum)raisedcosinefunctions.

Reed‐So

lomonDecoding

ThisentryallowsReed‐SolomonDecodingtobeEnabledorDisabledontheincomingtransport

stream.Reed‐SolomonDecodingmustbeenabledonlywhenthetransportstreamcontainsRS

encoding.

TestPattern

PressingtheSingleTonesoftkeyinthetestpatternsubwindowcausesasingletone,placedat

thece

nterofthespectrum,tobetransmitted.Itisusedtomeasurethechannelcarrier

frequency.Thesingletonesignalisthesamepowerastheexciterisputtingoutnormally.

NormaltransmissionisresumedbypressingtheStopTestsoftkey .

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Sharp SD-AT1000W Spécifications Page 111