Specifications

Maxiva UAX
October 17, 2013
3‐59
888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.
Copyright©2013,HarrisBroadcast
Figure 3-57 LPU DVB-T2 Setup Screen 5
Table3‐50XmtrHome>ExciterHome>Setup>DVB‐T2Modulator>Nextx4(screen5)
Field Explanation
TotalPLPs
Tot alnu
mberofPhysicalLayerPipes(PLP)sentintheT2transmission.InMPEG‐TSinputmodethereis
only1PLP.InT2MIinputmodetherecanbemultiplePLPsfrom1to255.
PLPNu
mber
Thenu
mberofanindividualPLPforparameterentry/display.InMPEG‐TSmodethePLPNumberis0
fixed.InT2MImodetheusercanselectPLPNumberfrom0to254.
PLPID(H
ex) Entervalueinwhitebox.Rangeis0to255.This8‐bitfielduniquelyidentifiesaPLPintheT2system.
GroupID(He
x)
Entervalueinwhitebox.Rangeis0to255.This8‐bitfieldidentifiesuniquelyaPLPwithintheT2
system.
PLPType PLP(phy sicallayerpipe)typesincludeType1(data),Type2(data).
HEM
Choicesar
eYesorNo.Themodeadaptationmodulecanprocessinputdatainoneoftwomodes,
normalmode(NM)orhighefficiencymode(HEM).NMisinlinewiththeModeAdaptationin[i.3],
whereasinHEM,furtherstreamspecificoptimizationsmaybeperformedtoreducesignallingoverhead.
TheBB
HEADERsignalstheinputstreamtypeandtheprocessingmode.
CodeRat
e
Choicesare1/2,3/5,2/3,3/4,4/5,or5/6.T h i s referstotheforwarderrorcorrection(FEC)whichusesthe
LDPC(lowdensityparitycheck)alongwithBCHcode.1/2coderateprovidesthemostrobust
performancecoincidentwiththelowersdataefficiency.5/6 coderateprovidestheleastrobust
performancecoincidentwiththehigh
erdataef ficiency.
BCHperf
ormstheoutercodingandLDPCperformstheinnercoding.
64KLDPC
LPDPC(l
owdensityparitycheck),Yesindicates64kLDPCisbeingused,Noindicatesthatthe16kLDPCis
beingused.
LDPCPari
tyCheck(codes)arepartoftheinnercodingforwarderrorcorrection(FEC).TwotypesofFEC
canbeusedwiththeassociatedPLP,theyarethe16kLDPCorthe64kLDPC.
Constellation
ChoicesareQPSK,16QAM,64QAM,or256QAM.Thisisthemainmodulationmodeforallsubcarriers
exceptforthoseoftheL1mode.
RotatedQA
M
Choicesar
eYesorNo.Yesisrecommendedstate.TheQAMconstellationscanberotatedofftheir
normalaxisupto30degreesinordertoimprovereception."Table3‐52Co
nstellationTypeand
Rotation"onpage3‐60sh
owstherotationbasedontheconstellationtype.
TIPI
Enterva
lueinwhitebox.Rangeis1to255.TIPiisthenumberofT2framesinaninterleavingframe
(wheninterleaverovermultipleT2frames,TItype=1).TIPimustbeafactorofNcellsandmustbele ss
thanorequaltothenumberofT2fr
amespersuperframe.
TITy
pe
Choicesar
e0or1.IftheTITypeissettothevalue'1',thanthereisoneinterleavingframewhichspans
multipleT2‐frames.ThenumberofT2‐framesisindicatedbyTIPi.IftheTITypeissettothevalue'0',
thenoneinterleavingframecorrespondstooneT2‐fr
ameandcontainsoneormoretimeinterleaver
blocks.
PCRRe
stamp ChoicesareYesorNo.PCRRestampissuedfortransportinterface.YESisrequiredwithtransportinput.