Specifications

Section-3 Operation
October 17, 2013
3‐34
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3.7.4.1 LPUOffAirIndication&OperatingMode
IftheLPUisoffairtheselectedRTACmodeindicator(Adapt,Hold,Stored,orBypass)wi llflash.
Whenth
eLPUisoffair,theRTACmayactuallybeinadifferentmode.ThereasonforthisisthatRTACcannotadapt
untiltheUAXisontheair,andthiscouldresultinafewminutesofuncorrectedtransmitteroperationuntiltheRTAC
circuitsadapt.
Fordig
italoperation,RTACcouldbeintheholdmodewhileofftheair,whereitwillholdthelastRTACoperating
setupwhichexistedjustbeforetheLPUwasswitchedofftheair.Itwillusethatsetuptocorrectthetransmitter,
whiletheRTACisreadapting,whenthatLPUissw
itchedonair.ItcouldalsobesettoStoredifanappropriate
correctionwasavailableinmemory.SeeSection3.7
.4.3onpage3‐35.
3.7.4.2 StoringanRTACCorrectionSet
FromtheStoredCorrectionSetssubwindow,uptofourRTACcorrectionsetupscanbesavedinSet1throughSet4.
Thereisanoptiontorenameeachstoredsetup.Thesetupcanbestoredformanyreasons,suchaswhenthe
transmitterwasfirstinstalled,oraftertransmittermaintenance.Thisfe
atureisalsousefulincomparativetesting.
Success/Attemptx/x
Thedigittotheri
ghtofthe/indicatesthenumberoftimesthatcorrectorattemptedtomakea
correction.
Thedigittotheleftofthe/indicatesthenumberoftimesthecorrectorsucceededinmakinga
correction.
Oncead
aptionhasstartedthesuccessesmaystopcountingifthecorrectordoesnotseeany
additionalimprovementsthatcanbemade.
Adapt
PressingtheAd
aptsoftkeyturnsitgreenandturnstheselectedcorrectoron.Thecorrection
algorithmwillcontinuouslycalculateandupdatecorrectionasneeded.Whenswitchingtothis
modefromanyothermode,thecorrectionalgorithmisreset.Thenormaloperationalmodeis
Adapt.
Hold
PressingtheHol
dsoftkeyturnsitgreenandkeepsthelastcorrectionvaluefortheselected
mode.Thisisashorttermoption.ForlongtermuseselectStored.WithHOLDactivecorrectionis
engagedbutnotadaptingtoanynewsolutionforchangesintheamplifiersorfilters.
Stored
Pressingth
eStoredsoftkeyturnsitgreenandselectsapreviouslystoredsetofcorrectionswhich
areusedasastaticdigitalprecorrection.Thecorrectionsaresa vedbyusingtheStoredCorrection
SetssubwindowintheRTACPage2screenonrightFigure3‐34onpa
ge3‐33andatSection
3.7.4.2onpage3‐34.StoringthecurrentactiveRTACfiltersetuporoperatingfromapreviously
storedsetupisdiscus
sedinSection3.7.4.2onpage3‐34.
Bypass
Pr
essingtheBypasssoftkeyturnsitorange.SelectingBypassturnstheselectedcorrectorOFF.
Correctionisnotengaged.
RT ACSt
ate
Enabled=Gree
n.Disabled=Red.Flashing=LPUoffair
IftheRTACstatusisDisabled,thisindicatesthatRTACwillnotadapt.TheRTACcanbedisableddue
toanyofthefollowingreasons:
‐Ex
citerisinactive(off ‐air)
‐PowerisinManualcontrolmode
‐Po
werCalibrationisactive
‐TransmitterisinOffstate
‐ExternalHoldcommandisasserted
‐Tr
ansmitterwasturnedonbutoutputpowerfailedtorampuptoACTUAL
StoredCorr
ectionSets
SelectSet1‐4.
SaveSet1‐4.
ThisscreenprovidesachoiceoflocationsforstoringfourdifferentRTACsettings.
Table3‐24XmtrHome>ExciterHome>Setup>DUC/RTAC
Field Explanation