Manuals / Mocomtech / Computer Equipment / Modem

Mocomtech CDM-QX operation manual Ber

Models: CDM-QX

1 258

Page 149

CDM-Qx Satellite Modem											Revision 5
Forward Error Correction Options										MN/CDMQx.IOM
										Eb/No in dB
1	2	3	4	5	6	7	8	9	10	11	12

1E-1

16-QAM Viterbi, Rate 3/4 and Rate 7/8 with 220,200 RS Outer Code

1E-2	Uncoded BPSK/QPSK
1E-2
										Uncoded 16-QAM
1E-3
1E-4										Specification
										Specification
										limit	Rate 7/8
										Viterbi and
										220,200 RS
										Outer Code
1E-5
						Typical
						Performance
1E-6
1E-7
1E-8
					Specification limit		Rate
					3/4 Viterbi and 220,200
					RS Outer Code
1E-9	1	2	3	4	5	6	7	8	9	10	11	12
	1	2	3	4	5	6	7	8	9	10	11	12
BER
	Figure 6-8. 16-QAM Viterbi, Rate 3/4 and Rate 7/8 with 220,200 R-S Outer Code

6–17

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Image 149

Contents

Revision CDM-QxPage Acquisition range Errata aPage Errata B Page Rx Rs n/k ENT IESS-310 network 219/201 Errata CPage Tx Rs n/k ENT IESS-310 network 219/201 Errata DPage Part Number MN/CDMQx.IOM Revision January 20,2007 Customer Support Table of Contents Chapter Functional Description External Connections Comparison of all TPC Modes Evolution of TPC in Comtech ProductsManagement Information Base MIB Files 11-1About this Manual Electrical Safety International Symbols CE Mark Warranty Policy CDM-Qx Satellite Modem Revision Preface MN/CDMQx.IOM Xii CDM-Qx/QxL IntroductionFeatures Verification DoubleTalk Carrier-in-CarrierSoftware Flash Upgrading Turbo Product Coding Remote ControlData Interfaces Major Assemblies Assembly DescriptionFast Fast Options and Hardware OptionsFast System Theory Fast Accessible OptionsImplementation Hardware OptionsSupporting Hardware and Software Compatibility BandCDM-Qx Satellite Modem Revision Introduction MN/CDMQx.IOM Unpacking InstallationMounting Optional Rear-Mounting Installation BracketInstallation of the Optional Mounting Brackets Select Internal if Loop ConfigurationConnect External Cables Observe the followingFunctional Description Page Modem Block Diagram Page Connections LED Front PanelRear Panel Rear PanelPage Name Ref. Desig Connector Type Function Modem Rear Panel ConnectorsBNC IECRF Output 75 or 50Ω 3 485/232 Connector 2 M&C 10/100BaseT ConnectorRemote Control Interface Connector Pin Assignments Use for 2-wire RS-485 operationPin # Signal Function Name Alarms ConnectorAlarm Interface Connector Pin Assignments Unbalanced G.703 Tx/Rx Connectors Balanced G.703 Connector Tx/Rx ConnectorBalanced G.703 Interface Connector Pin Assignments Pin # Signal Function Name DirectionPin # Generic Signal Description Direction RS-422 RS 7 RS-530 Data Interface ConnectorLvds RS-232 Circuit #Xx6. Quad E1 Data Interface J1 Connector Pin Assignments Quad E1 Data Interface ConnectorsAC Power Connector RX and TX if ConnectorsDC Power Connector AC Power SpecificationsGround Connector This page is intentionally left blank Operation Color Condition Front Panel LED IndicatorsLED CLR Diamond Keypad Presently used on all UnitsENT Modems Left-Hand Display AreaRight Hand Display Area TXFMD MD RedundancySpectrum Analyzer Accessing the Display AreaRight-Hand Display Area RXSPrinciple Menu Tree Opening Screen Main Menu Config Monitor Test Info Save/Load Util ODUComtech EF Data CDM-Qx Firmware Version ODUConfig Remote Tx Rx Group Frame Interface Ref Mask ODU ConfigConfig„Remote„Serial„Interface Config„Remote Remote ControlConfig„Remote„Serial Config„Remote„Ethernet Config„Remote„Serial„Interface„RS485 RS-485 Bus AddressConfig„Remote„Serial„Baudrate Config„Remote„Ethernet„Address Config„Remote„Ethernet„GatewayConfig„Remote„Ethernet„MAC Config„Remote„Ethernet„SNMPSnmp Config„Remote„Ethernet„SNMP„CommunitiesConfig„Remote„Ethernet„SNMP„Traps Trap Version ENT SNMPv1 SNMPv2 Trap Community , ENT comtechTrap IP Addr#1 ENT Trap IP Addr#2 ENTTx FEC Mod Code Data Freq On/Off Pwr Scram Clk Inv Txα Config„Tx TransmitConfig„Tx„Mod Modulation Scheme Config„Tx„FEC TX FEC TypeTx FEC Vit Vit+RS TCM+RS TPCConfig„Tx„Data TX Data Rate Config„Tx„Code TX Code RateTx Code Rate 5/16 21/44 1/2 3/4 17/18 Tx Data Rate 05000.000kbps Sym02500.000kspsTx if Freq 1156.3456 MHz Config„Tx„Freq TX if FrequencyTx if Freq 1156.3456 MHz RF=14156.3456 ENT Config„Tx„On/Off Transmit ON/OFF ControlTx Output State On Off RxTxInhibit Common , ENT Tx Common Output State Off OnConfig„Tx„Pwr„AUPC Aupc Mode Config„Tx„Pwr Transmit Power Level ModeConfig„Tx„Pwr„Manual Manual Mode Config„Tx„Pwr„AUPC MAX Range Config„Tx„Pwr„AUPC Target Eb/NoConfig„Tx„Pwr„AUPC Alarm Config„Tx„Pwr„AUPC DEMOD-UNLOCKConfig„Tx„Clk TX Clocking Mode Config„Tx„Pwr„Combined Combined Transmit PowerConfig„Tx„Scram Scrambler Tx Inversion functions Spectrum Data Clock ,ENT Config„Tx„Inv TX Inversion FunctionsTx Spectral Inversion Normal Inverted Tx Data SenseConfig„Rx Receive Config„Tx„Txα TX Roll-Off α factorTx Roll-off 20% 35% ENT RxFEC Demod Code Data Freq Acq Descram Buf Inv Misc CnCRx FEC Vit Vit+RS Config„Rx„FEC RX FEC TypeTCM+RS Case Rules CommentConfig„Rx„Code RX Code Rate Config„Rx„Demod Demodulation SchemeDemodulation Bpsk Qpsk 8-PSK 16-QAM Rx Code Rate 5/16 21/44 1/2 3/4 7/8 17/18Rx Data Rate 05000.000kbps Sym02500.000ksps Config„Rx„Data RX Data RateConfig„Rx„Acq Demod Acquisition Range Config„Rx„Freq RX FrequencyRx if Freq1156.3456 MHz RF=12156.3456 ENT Demod Acquisition RangeENT Config„Rx„Descram DescramblerConfig„Rx„Buf RX Buffer Clock Source Config„Rx„Misc Rx Miscellaneous Config„Rx„Inv RX Inversion FunctionsConfig„Rx„CnC CARRIER-IN-CARRIER→ Config„Rx„Misc„EbNo Eb/No AlarmConfig„Rx„Misc„Rxα RX Roll-Off α factor Config„Rx„CnC„FrqOffs CnC Frequency Offset Config„Rx„CnC„Mode CnC→ Mode of OperationPlease Check TX Power Level Please WaitConfig„Rx„CnC„ReAcq CnC RE-ACQUISITION Time Config„Rx„CnC„SrchDelay CnC Search DelayConfig„Group Grouping MOD/DEMOD Cards Config„Group„ModemConfig„Group„Redundancy„Config Config„Group„RedundancyConfig„Group„Redundancy„Config „11 Config„Group„Redundancy„Config „12Config„Group„Redundancy„Mode„Manual Config„Group„Redundancy„ModeConfig„Frame Framing Mode Config„Frame„Unframed UnframedFraming mix AUPC-Only Edmac ModeAUPC+EDMAC Master SlaveDistant-end Base Address Config„Frame„D&I++ D&I++0240 Address This Slave Unit ENTInterface RS422 V.35 RS232 Config„Interface Data InterfaceHssi ASI G.703 QDI None RTS/CTS operation , ENT Loop,RTS Controls Tx OutHDB3 AMI 703 E1 Line Code HDB3 AMI , ENT T1 Line Length FeetHDB3 AMI Config„Mask Mask Config„Ref Reference OscillatorAlarm Mask Transmit Receive Reference BUC LNB ,ENT Frequency Reference Internal MHz ENTTx-FIFO Alarm ENT Active Masked Tx Alarm Mask Tx-FIFO BPV Tx-AIS ENTRx Alarm Mask AGC Eb/No Rx-AIS Buffer AGC AlarmLNB Alarm Reference AlarmBUC Alarm Config„ODU„BUC Block Upconverter BUC Config„ODU Outdoor Unit for L-Band Unit OnlyODU BUC LNBConfig„ODU„BUC„M&C-FSK„Address FSK Comms Config„ODU„BUC„M&C-FSK M&C FSKConfig„ODU„BUC„M&C-FSK„Address FSK Address BUC M&CConfig„ODU„BUC„DC-Pwr BUC DC Power Config„ODU„BUC„M&C-FSK„Tx-On/Off FSK TX-ON/OFFConfig„ODU„BUC„10MHz BUC 10MHz Config„ODU„BUC„Alarm BUC AlarmBUC Current Alarm Upper Limit1200mA Config„ODU„BUC„Delay BUC DelayBUC Current Alarm Lower Limit1200mA Power-On DelayConfig„ODU„BUC„Mix BUC MIX Config„ODU„BUC„LO BUC LOLNB DC Config„ODU„LNB LNBConfig„ODU„LNB„Voltage LNB Voltage Config„ODU„LNB„Alarm LNB Alarm Config„ODU„LNB„Power-On/Off LNB POWER- ON/OFFConfig„ODU„LNB„10MHz LNB 10MHz Config„ODU„LNB„Mix MIX Config„ODU„LNB„LO LOLNB Current Alarm Lower Limit 050mA ENT LNB Frequency MixMonitor„Alarms„Unit Unit Alarms Monitor„Alarms AlarmsMonitor„Alarms„ODU Outdoor Unit Alarms Monitor„Alarms„Receive Receive AlarmsMonitor„Alarms„Transmit Transmit Alarms Monitor„Event-Log EVENT-LOG or Stored Events Monitor„Rx-Params RECEIVE-PARAMETERSLog 024 30/11/97 Clear Demod Lock 3 ,ENT Log 023 30/11/02 Fault Demod Lock 3 ,ENTMonitor„Event-Log„View View Stored Events Monitor„Stats„View View Link Statistics Link Statistics View Clear-All Config ENTMonitor„Stats Link Statistics for grouped as modem only Stats Logging Interval Disabled,ENT Monitor„Stats„Config Configure StatsMonitor„Stats„Clear-All Clear ALL Stats Clear all Stored Stats? No YesMonitor„CnC Monitor CARRIER-IN-CARRIER CnC Monitor„AUPC Monitor AUPCfor grouped as modem onlyODU LNB Monitor„ODU Monitor ODU for L-Band Unit onlyTest Test Mode Bist ENT Spec-AnalyzerMode Norm if 2 Dig 2 I/O 2 RF Tx-CW Tx1-0 ENT TX-1,0 Norm If Loop Dig Loop RF LoopTX-CW Bert Config Tx=ON Rx=ON Tx-Pat=2047 Rx-Pat=2047 Bist BERT-Config BERT-Mon BERT-Control ENTBert Monitor Errs=0000253 BER=8.5E-07 Bert Control 10E-3Err=OFF Restart=NO SyncThres=256Spectrum Analyzer Mode Mode ConfigConfig Spectrum Analyzer CenterFreq Span Spectrum AnalyzerIf Loopback Info Rem Tx Rx Buffer Frame Interface Mask Ref ID Info„Rem Remote Control InformationInfo Information Tx C N N Info„Tx TX InformationTx 1140.000 05000.000 TUR 8P 17/18 S EXT -20.0 on N Rx 1140.000 05000.000 TUR 8P 17/18 D RX BUF +/-32k N Info„Rx RX InformationRx C N N Demod Sweep Acquisition rangeInfo„Buffer Buffer Information Buffer Enabled Tx=Rx ENTInfo„Frame Framing and Edmac Information Info„Interface Interface InformationInfo„Ref Frequency Reference Info„Mask Alarm Mask InformationInfo„ID Circuit Identification Character TST MessageNo YES Save/Load„Save Save ConfigurationNew Config has been Loaded From Location Save/Load„Load Load ConfigurationEmpty ENT Contains No Data! ENTUtility„Clock REAL-TIME Clock Utility„RxBuffer Buffer RecenterUtility RxBuffer Clock Ref ID Display Firmware Fast Real-Time Clock , ,ENT Time=120000 Date24/04/03Warm-up delay ENT Utility„Ref Reference AdjustUtility„ID Circuit Identification Internal FreqUtility„Firmware Firmware Utility„Display Display BrightnessProgramming Cpld Current Active Image #1 Next Reboot Image #1 #2Update Cpld to v1.x.x? No Yes ENT Fast Utility„FAST Fast Code OptionsEdit 20 digit Fast Code 00000000000000000000 ENT View Options ENT Redun Not InstalledForward Error Correction Options For Against ViterbiViterbi Decoding Summary Reed-Solomon Outer Codec Concatenated R-S Coding Summary Closed Network ModesPSK/TCM Coding Summary Trellis CodingEvolution of TPC in Comtech Products Turbo Product Codec Hardware Option IntroductionAvailable TPC Modes End-to-End Processing DelayTurbo Product Coding processing delay comparison Comparison of all TPC Modes Turbo Product Coding Summary BER Viterbi DecodingViterbi with Decoding, with PSK/TCM Rate 2/3Without 219, 201 RS Outer CodeComtech Turbo Product Codec Rate 3/4 QPSK, 8-PSK 16-QAM CDM-Qx Satellite Modem Forward Error Correction OptionsComtech Turbo Product Codec Rate 7/8 QPSK, 8-PSK 16-QAM Comtech Turbo Product Codec BPSK/QPSK Rate 21/44 Bpsk and Rate 5/16 Bpsk TurboBER Page Theory Of Operation Edmac ChannelM&C Connection Setup Summary This page is intentionally left blank Automatic Uplink Power Control Max Range Setting Aupc ParametersTarget Eb/No Compensation Rate AlarmDemod Unlock Monitoring DoubleTalk Carrier-in-Carrier Page Transponder Utilization with and without CnC→ Page Redundancy CDM-Qx Satellite Modem Revision Redundancy MN/CDMQx.IOM 10-2 Ethernet Management Interface Protocols ManagementWeb Web Server Http InterfaceLevel Web Server Menu TreeWeb Server Menu Tree 11-4 11-5 11-6 11-7 Management Information Base MIB Files Snmp InterfaceSnmp Traps Snmp Community StringsTelnet Interface Alarms and Faults SNMPv2 notifications11-11 11-12 Page Page FEC ModulatorReferred to symbol rate Power Spectral DensityComtech EF Data CDM-Qx TransmitViterbi DemodulatorPSK/TCM Codec Turbo ProductCoding HIGHER-ORDERModulation Hssi Automatic Uplink Power Control FutureData Rate Ranges FCC Framing Summary FutureMiscellaneous Page Appendix B. Flash Upgrading Ethernet FTP upload procedureConstruction Sector CDM-Qx Satellite Modem Revision Flash Upgrading MN/CDMQx.IOM RS-485 Appendix C. Remote ControlBasic Protocol RS-232Start Of Packet Packet StructureController-to-target Example 0135/TRQ=70.2345CR Target-to-controllerSlot Address AddressInstruction Code ‘=’ code Target to Controller is used in two ways Instruction Code Qualifier$ code target-to-controller is only used as follows End Of Packet Remote CommandsMessage Arguments CDM-Qx Satellite Modem Revision Remote Control MN/CDMQx.IOM TX Remote Commands TCR? TCR=TCR TCR#TSI= TSI? TSI=TSI TSI# TSI$TCK= TCK? TCK=TCK TCK#RFQ= RFQ? RFQ=RFQ RFQ# RFQ$RMD= RMD? RMD==BPSK RMD =QPSK RMD#RDR= RDR? RDR=RDR RDR#RSW= RSW? RSW=RSW RSW#EBA= EBA? EBA=EBA EBA# EBA$ITF= ITF? ITF=ITF ITF#ESA= ESA? ESA=ESA ERF=TST= TST? TST=TST TST#AUP= AUP? AUP=AUP AUP#LBO= LBO? LBO=LBO LBO#HHC= HssiHHC? HHCApplies to CST? CST=CST CST#TIM= TIM? TIM=TIM TIM#IRM = IRM? IRM=IRM IRM#FBU= FBU? FBU=FBU FBU#CSD? CSD=CSD CSD#EID? Query CommandsUID? BytesFLT? =Change in faultREB? WHO?RNE= CC is Fault Code numbers, as in FLT? Or Infor Code, whichRNS=CR RX BER RSL?CRM? CDM?FRW? CFM?SWR? IMG= IMG? IMG=IMG IMG#ITP? Bulk Commands OGC= OGC? OGC=OGC OGC#Band Unit Only Arguments For Command or Response to QueryBAD= BCH= BOE=BCL= BUC LO BLO=BUT? BUCBPA? BSV?Control Band Unit Only Parameter Instruction Type Code Qualifier LNB PowerParameter Instruction Type Code Qualifier Parameter Command Instruction Type Code Qualifier BCT= BCT? BCT=BCT# BCT$SPF= SPM=SPS= SPM= SPM?DNI= DNI? DNI# DNI$ DNI DNI=Applies to Cards grouped As modem Parameter Instruction Type Code Qualifier Drop TimeslotDTS= CDM-Qx Satellite Modem Revision Remote Control MN/CDMQx.IOM Carrier-in-CarrierDescription Performance CharacterizationFigure D-1. Adjacent Carrier a As Tested and BAs Plotted Degradation Due To Carrier Spacing20% Rolloff Carrier Spacing ForDegradation ≤ 0.5 dB Carrier Spacing For 35% RolloffPSK 3/4 Turbo, α = 35% Figure D-5. Adjacent Carrier Cases Selecting The Adjacent Carrier CurveCarrier-in-Carrier Ratio CnC Ratio Curve To Use In Figure D-2, ErrorCase Desired Adjacent Carrier Found., or D-4Figure D-7. CnC Ratio For Qpsk and 8-PSK 1st CnC Example Adjacent Carriers, CnC Ratio and Rain Fade Symbol Rate RatioCnC Carrier Offset Site a Site B DL Fade UL Fade Site a Site BComment Per Figure DFigure D-10. Link With Fading At Site a 2nd CnC Example CnC Ratio With Asymmetric Links Parameters Site a Site B Link parameters and results are summarized in the tablePer Figure D- Qpsk 3rd CnC Example Asymmetric Link With Rain FadeEb/No Degradation At Site a Parameter Due To Fade At Eb/No Degradation At Site B Parameter Due To Fade At ConclusionMetric Conversions 480 333 2200 Phone 480 333 2161 FAX

BER

Figure 6-8. 16-QAM Viterbi, Rate 3/4 and Rate 7/8 with 220,200 R-S Outer Code