Specifications

Section-3 Operation
October 17, 2013
3‐94
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WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004
Figure 3-89 LPU CTTB Modulator Status Screen 4
MaximumNetwork
Delay
Thisisanadditionaldelayaddedinordertobeabletoeasilyaddatransmittertothenetwork
withouthavingtoadjustthedelayofallnetworktransmitters.Thisdelayissetinthedistribution
networkcontrolcenter.
SIPDelayAdjust SIP=SecondFrameInitializationpacket
TDID
Thisisadisplayoftheidentificationnumberassignedtothistransmitter,whichispartofasingle
frequencynetwork.TheIDisnecessarytoallowcommunicationwithandcontrolofeach
transmitterinasinglefrequencynetwork.
TestMode
DCTestTon eMode
Displaysteststatus,whichisDisableorEnable.EnablingtheDCTe
stTon e Modetransmitsasingle
tonewhichisplacedatthecenterofthespectrum.Itisusedtomeasurecarrierfrequency.The
singletonesignalisthesamepowerastheexciterisputtingoutnormally.Withthisbeingthesame
powerlevelthisshouldnotcauseanydama
getothetransmitter.
Table3‐86XmtrHome>ExciterHome>Status>CTTBModulator>Nextx3(screen4)
Field Explanation
BitRateAdaption
DisplaystateisDisabledorEnabled.ThisappliesonlytoMFNmode.BitRateAdaptationwill
dropallincomingnullpackets,introducenewnullpacketsasappropriatetomanagethedata
rateandrestampProgramClockReference(PCR)appropriately.
ThisisnullpacketinsertionandPCR(programclockra
te,timestamptosynchronizethe
receiver)restamping.
SIPFrequencyOffset
DisplayedinHz.ThisisafrequencyoffsetwhichmaybenecessarywhenoperatinginSFN
mode.
UnmuteIfNoSIP
DisplaystateisNoorYes.ControlswhetherornottheM2XisreleasedfrommuteifnoSIP
packetisde
tectedinSFNmode.Thisisanetworksafeguard.(SIP=SecondFrameInitialization
packet).
ASI1SyncLossCount Numberoftimessyncwaslost.
ASI2SyncLossCount Numberoftimessyncwaslost.
Reset Presssoftbuttontoresetsynclosscount.
Table3‐85XmtrHome>ExciterHome>Status>CTTBModulator>Nextx2(screen3)
Field Explanation