Sharp SD-AT1000W Especificações descarregar pdf (Página 119)

Maxiva UAX

October 17, 2013

3‐51

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

Figure 3-50 LPU DVB-T Setup Screen 6

Table3‐39XmtrHome>ExciterHome>Setup>DVB‐TModulator>Nextx5(screen6)

Fields Explanation

UpdateNITFlag

ChoicesareDisabledorEnabled.UpdateNIT(NetworkInformationTable)Flagallowstheupdateof

theNITpacketwithUAXRFfrequency.ThisisonlyselectableinMFNmode.

AdjustedFrequency UAXRFfrequencywhichistobeinsertedinNIT.Novaluecanbeentered.Thisisfordisplayonly

CellIDPriority

ChoicesareDisabled,MIP(Mega‐FrameInitializationPacket)CellID,orLocalCellID.Selectssourceof

CellIDtobeinsertedinTPS(TransportParameterSignalling)bits.Disabled:NoCellIDisinsertedinTPS

bits.MIPCellID:valueofCellIDreadfromMIPpa

cket.Novaluecanbeentered,thisisfordisplayonly.

LocalCellID:valueofCellIDtoinsertinTPSbits,rangeis1‐65535.

CellID DisplaysvalueofCellID

RaisedCosine

Window

ChoicesareBypass(nowindowing),Minimum,Medium,orMaximum.

ThisentryenablesRaisedCosineWindowshapingbetwe

enOFDMsymbolstoreduceout‐of‐band

distortion.Thewindowlengths,afractionofsymbolduration,dependonlengthoftheguardintervals,

asshownbelow.

IfGuardIntervalis1/32,thenMIN=1/512,MED=1/128,MAX=1/64.

IfGuardIntervalis1/16,thenMIN=1/512,MED=1/

128,MAX=1/32.

IfGuardIntervalis1/8,thenMIN=1/512,MED=1/128,MAX=1/16.

IfGuardIntervalis1/4,thenMIN=1/512,MED=1/128,MAX=1/8.

TXID

Isthetransmitteridentifierinasinglefrequencynetwork.

ThiswillenableMIPpacketoptionalpa

rametersthataresetforthistransmitterIDvalue.T ransmitter

IDrangetobeenteredis1‐65535.

Muteifoutby

%ofGI

Allowableentryrangeis5%to50%.InSFNmode,theexciterwillmutewhen1PPSref erenceis

missing(andLPU10MHzOCXOisflywheeling)af

terthetimingerrorbecomestoolarge.Usercan

specifytheallowederrorintimingasapercentageofguardinterval(GI)from5%to50%(defaultis

20%).

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Sharp SD-AT1000W Especificações Página 119