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Section-3 Operation

October 17, 2013

3‐94

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

1 2 ... 157 158 159 160 161 162 163 164 165 166 167 ... 291 292

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