JVC TDR6 installation and operation guide Input Status LED Not Illuminated, Minimum E b /N 0 dB

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To clear the fault history log from a remote unit issue the FAULTLOGCLEAR command.

Initialization Self-TestThe TDR6 has several built-in-self-tests. many of these tests are performed Function automatically when the unit is powered up or reset. Faults detected when the unit

is powering up are displayed as error messages on the LCD screen.

Other self-tests are performed during real-time operation as the system monitors the transport stream. Faults detected while the unit is running are indicated by the LEDs on the front panel.

You can also query the system on the status of faults using the Faults menu.

Troubleshooting the This section provides information on troubleshooting the QPSK demodulator in a QPSK Demodulator TDR6 configured with a TDEM-6110 option module.

Input Status LED Not Illuminated

If the Status LED is not illuminated, the demodulator, decoder, or the transport stream is not locked. This problem may be caused by:

Receive signal Eb/N0 level is to low

Receive signal power level is to low

Receive carrier offset is wrong

Receive Signal Eb/N0 Level

The Eb/N0 value in the Details menu under Input/Status displays the estimated Eb/N0 level of the receive signal in units of decibels (dB).

The minimum Eb/N0 level required by the QPSK demodulator for flawless video reception at each Viterbi Code Rate is listed in the following table.

Viterbi Code Rate And Eb/No Minimum Levels for QPSK

Demodulator

Viterbi Code Rate

Minimum Eb /N0 (dB)

1/2

4.5

 

 

2/3

5.0

 

 

3/4

5.5

 

 

5/6

6.0

 

 

7/8

6.4

 

 

An Eb/N0 level above the minimum DVB requirement is acceptable.

If the Eb/N0 level drops below the minimum DVB requirement, the video reception can be interrupted or of poor quality.

If the Eb/N0 level is above the minimum DVB requirement, the TDR6 should acquire the carrier, demodulate the signal, allow the decoder to lock the transport stream, and provide decoded video and audio output.

For information on estimating the Eb/N0 level, refer to the appendix on the QPSK demodulator.

Troubleshooting

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Contents TDR6 Electric Shock Hazard Contents Appendix G Demodulator Application Notes Chapter Configuring the TDR6Chapter Troubleshooting Appendix F Option Module OverviewImportant Information Using This GuidePreface Locating InformationRevision Issuing CommandsFront Panel Navigation DisplaysCartons and Packing Materials ErrorsLCD Display Miti SAAIMQ OVEUse Approved Attachments Only Viii 01-0870-401B 01/03 Overview Overview Overview 01-0870-401B 01/03 AC Power Cords Installing the TDR6Ventilation Power-up Sequence Connecting to a Power SourceBasic TDR6 SD Configuration with No Option Modules Installed TMAC-6125 Ports Connecting to a Remote UnitConnecting to a Network TDEC-6161 Ports Cabling the Analog Audio ConnectorsCabling the TDEM-6110 LNB Power01-0870-401B 01/03 TDR6 Front Panel Front PanelTDR6 DTV Receiver/Decoder Menu Structure LCD Text Formats LCD Display LCD SymbolsData a Menu Qpsk Key Character Displayed Correcting Mistakes Example DVB Command Description Parameters / Response ValuesQPSK, 8PSK, 16QAM DetailsInputConfigFilter allows you set the PCR filter BER Message No services availableNTSC, PAL, Auto PIDMPEG-2 Value, that does not begin with EID Important Considerations when entering Biss EkeyMAC ControlEIA-232 used to configure the remote portLocking the Front Panel Restoring a Default ConfigurationRestoring a User Configuration Saving a User ConfigurationUnlocking the Front Panel Setting the DateSetting the Time Performing a System ResetConfiguring Remote Software Parameters Using a Remote UnitRemote Port Ethernet Port Command TypesBaud 01-0870-401B 01/03 TDR6 HD/SD Back Panel with Remote Designators Informational Remote Commands Response Error Messages Explanation Action RequiredLang DelayAuto ChannelmodeBiss Sample RateSource MPEG-2, Atsc MPEG2 VOLDC Filter Biss ModeBiss Status DC AutoselLNB DclockDmlock EbnoTune FaultlogclearHdvd Delay Rolloff 35RCRO, 25RCROMC Config List MC Access CodeMC Access FP RO, RW MC Access UnlockMC Ethernet IP Address MC Default RestorePgca Authorization Pgca ModeInterface Pgca TimeoutData HandshakeVBI Format VD DelayVBI VBI ControlVD Submode VD Mode PAL, NTSC, AutoVD Setup VD PIDConfiguration Configuring the TDR6Quick Start Selecting a Service Demodulator Configuration Detailed TDR6 ConfigurationSetting Local Date and Time TDR6 Detailed Configuration ProcedureConfiguring the L-Band Carrier Frequency Qpsk Parameter Front Panel Menu Remote Command01-0870-401B 01/03 Fault History TroubleshootingFault Reporting and Monitoring Current FaultsCommand Mnemonics Abbreviation Option Module Fault Descriptors are defined in the following table Viewing the Fault History Log Viewing Current FaultsMinimum E b /N 0 dB Input Status LED Not IlluminatedPerformance Problems FACTORY-CONFIGURABLE Features Technical SpecificationsStandard Features High-Definition Video Decoder Default ConfigurationsDemodulator a D Standard-Definition Video DecoderAudio Decoder a F Remote ControlUser Data a B Ethernet Front Panel Access01-0870-401B 01/03 Port Pinouts Fault Relay Port Pin SpecificationsUser Data port Pin Specifications Standard RS232 Ethernet Port Pin Assignments Signal Signal DefinitionNumber Synchronous Asynchronous TMAC-6125 Specifications Port SpecificationsTDEC-6161 Specifications TDEC-6100 SpecificationsTAUD-6100 Specifications LNB Port Specifications TDEM-6110 Specifications01-0870-401B 01/03 PAL Tiernan VBI Data TransmissionTiernan VBI Data Transmission Tiernan Proprietary Closed Captions Tiernan CC Tiernan CC Mode is for Ntsc Format OnlyDVB 422 Expanded Windows, 16-line and 32-line Lines Expanded Windows Field for an Encoded Picture Frame Tiernan Closed Captions Front Panel Commands Front Panel Commands for Encoder Configuration32LINES Remote Commands for Encoder ConfigurationVE TCC VE Vbipass01-0870-401B 01/03 Typical Option Module Option Module OverviewOption Module Overview Industry Standard LNB Frequencies Demodulator Application NotesDemodulator Tuner SAW Filter Spacing Information RateTransponder Output Spectrum WidthEb/N0 Definition Minimum and Maximum Information RatesSpectrum Analyzer Estimating Eb/N0 Using a Spectrum AnalyzerDemodulator Low Eb/N0 Alarm Eb/N0 Estimation AlgorithmDiagnostic Commands Offset = Actual RF Programmed RF Table Top and Rack Mount Installation Instructions Rear Rack Mount Instructions Fuse Rear Rack Bracket Mounting Instructions01-0870-401B 01/03 Index Index