Specifications

Section-3 Operation
October 17, 2013
3‐72
Copyright©2013,HarrisBroadcast
WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004
Carrier1Level:
SetdB
.
ThisrepresentstheamplitudeadjustmentoftheBTSCSoundCarrier1levelindBrelative
topeaksyncofthevisioncarrierrange.
Carrier2Level
SetdB.
Thisrep
resentstheamplitudeadjustmentoftheBTSCSoundCarrier2levelindBrelative
topeaksyncofthevisioncarrierrange.
DeviationLimiter
Threshold
ChoicesareOff,60kHz,90kHz,or120kHz.
Thisfunctionwilllimitthesoundcarrierfrequencydeviationtothevalueselectedand
preventsoundcarrieroverdeviation.
Pilot
ChoicesareOfforOn.
Thistu
rnsthepilotofforon.ThepilotindicatesthepresenceofSoundCarrier2or
modulationofSoundCarrier2.
AFGai
nSubWindow
AFSN
D1
SetdB.
Theva
lueenteredinthiswindow(rangeor‐9.9to+6dB)isintendedtochangetheAF
Sound1inputgainsothattheadjustedaudioinputsignallevelwillbe0dBm.
AFSN
D2
SetdB
.
Thevalueenteredinthiswindow(rangeor‐9.9to+6dB)isintendedtochangetheAF
Sound2inputgainsothattheadjustedaudioinputsignallevelwillbe0dBm.
ForAFSND1orAFSND2,iftheactualinputlevelisotherthan0dBm,theAFSND1or2
(gain)mustbeadjustedtochangethatlevelto0dB.Whentheinputlevelhasbeen
correctlyset,thedeviationwillbecorrect.
Forexa
mple,iftheactualinputlevelis‐6dBm,setAFSND1or2(gain)issetto+6dB,to
producecorrectaudiodeviation.
DetectorDec
ay
ChoicesareFastorSlow .
Thisde
finesthespeedatwhichtheDeviationSoundCarrier1andDeviationSoundCarrier
2indicationreturnstozero.
CoderControl
ChoicesareAutoorManual.
ThisisforselectionoftheHighPriorityparameterlistedbelow.
HighPri
ority
Choicesar
eTTX‐LineorDataline.
Choosewhic
hmodeofcoding(TTX‐LineorDataline)willbethehighprioritychoice.This
selectiondetermineswheretheinformationconcerningthesoundstandardislocated.
TTX(t
eletext)orDatalinearevideolineswithintheverticalinterval.Theselinesareblanked
fortheverticalretraceandareusedtocarrydigitaldatainformationandvideotestsignals.
Datalineisfoundonline16forfieldsF1andF3,andline329forfieldsF2andF4.Lines17
and18forfieldsF1andF3,andlines330and331forfieldsF2andF4,containvideotest
signals.
TTX(t
eletext)canbeonlines19‐22forfieldsF1andF3,andlines332‐335forfieldsF2
andF4,dependingonlocalregulations
ManualCoding
Choicesar
eDual,Mono,orStereo.
Thisch
oiceisusedtoselecttheoutputsignalmode,Monaural,Dualaudio,orStereo.
Preemphasis
Choicesar
eOff,50us,or75us.
Thisch
oicesetsthepreemphasisofthemodulationofthetwomonauralsoundcarriers.
Table3‐65XmtrHome>ExciterHome>Setup>AnalogModulator(Dualscreens3&4)
Field Explanation