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Mocomtech CDM-QX operation manual Demodulator, Viterbi, PSK/TCM Codec, Turbo Product

Models: CDM-QX

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CDM-Qx Satellite Modem	Revision 5
Summary of Specifications	MN/CDMQx.IOM

A.2 Demodulator

FEC, Data rate range, operating modes, descrambling, input impedance/return loss etc, as per Modulator

Input power range	-15 to -45 dBm, < 2.048 Msps (desired carrier)
(70/140MHz IF)	-15 to -40 dBm, > 2.048 and < 4.096 Msps (desired carrier)
	-15 to -35 dBm > 4.096 Msps (desired carrier)
	+35 dBc maximum composite, up to -5 dBm
Input power range	-130 + 10log(Symbol Rate in Hz) minimum signal level
(L-Band)	50dB AGC range

Acquisition range	±1 to ±32 kHz, programmable in 1kHz increments (below 64 ksps, ± symbol rate/2) (70/140)
	±1 to ± (symbol rate/2) kHz up to ± 200kHz (L-Band)
Acquisition time	Highly dependent on data rate, FEC rate, and demodulator acquisition range.
	Note that Reed-Solomon increases acquisition time, due to the additional time taken for the
	RS decoder to declare synchronization.
Clock tracking range	± 100 ppm min
VITERBI		Rate 1/2 (B, Q)		Rate 3/4 (Q)	Rate 7/8 (Q)
BER performance		Guaranteed Eb/No:		Guaranteed Eb/No:	Guaranteed Eb/No:
(met in the presence		(typical value in		(typical value in	(typical value in
of two adjacent		parentheses)		parentheses)	parentheses)
carriers, each 7 dB	For:
higher than the	BER=10-5	5.4 dB (4.9 dB)		6.8 dB (6.3 dB)	7.7 dB (7.2 dB)
desired carrier)	BER=10-6	6.0 dB (5.5 dB)		7.4 dB (6.9 dB)	8.4 dB (7.9 dB)
	BER=10-6	6.0 dB (5.5 dB)		7.4 dB (6.9 dB)	8.4 dB (7.9 dB)
	BER=10-7	6.7 dB (6.2 dB)		8.2 dB (7.7 dB)	9.0 dB (8.6 dB)
VITERBI and RS		Rate 1/2 (B, Q)		Rate 3/4 (Q)	Rate 7/8 (Q)
220,200 or 200,180		Guaranteed Eb/No:		Guaranteed Eb/No:	Guaranteed Eb/No:
Outer Code BER		(typical value in		(typical value in	(typical value in
(with two adjacent		parentheses)		parentheses)	parentheses)
carriers, each 7 dB	For:
higher than the	BER=10-5	4.3 dB (4.0 dB)		5.6 dB (4.7 dB)	6.5 dB (6.0 dB)
desired carrier)	BER=10-6	4.4 dB (4.1 dB)		5.8 dB (4.8 dB)	6.7 dB (6.2 dB)
	BER=10-6	4.4 dB (4.1 dB)		5.8 dB (4.8 dB)	6.7 dB (6.2 dB)
	BER=10-7	4.5 dB (4.2 dB)		6.0 dB (5.2 dB)	6.9 dB (6.5 dB)
8-PSK/TCM CODEC		Rate 2/3 8-PSK/TCM		Rate 2/3 8-PSK/TCM
BER		Guaranteed Eb/No:		w/concatenated RS
(With two adjacent		(typical value in		Guaranteed Eb/No:
carriers, each 7 dB		parentheses)		(typical value in
higher than the	For:			parentheses)
desired carrier)	BER=10-5	7.9 dB (7.2 dB)		6.3 dB (5.4 dB)
	BER=10-5	7.9 dB (7.2 dB)		6.3 dB (5.4 dB)
	BER=10-7	9.5 dB (8.7 dB)		6.7 dB (5.8 dB)
	BER=10-8	10.4 dB (9.5dB)		6.9 dB (6.0 dB)
TURBO PRODUCT		Rate 1/2 (Q)		Rate 21/44 (B)	Rate 5/16 (B)
CODEC		Guaranteed Eb/No:		Guaranteed Eb/No:	Guaranteed Eb/No:
Rate 1/2 QPSK		(typical value in		(typical value in	(typical value in
Rate 21/44 BPSK	For:	parentheses)		parentheses)	parentheses)
Rate 5/16 BPSK	BER=10-6
BER	BER=10-6	2.9 dB (2.6 dB)		2.8 dB (2.5dB)	2.4 dB (2.1dB)

A–3

Image 181

Mocomtech CDM-QX operation manual Demodulator, Viterbi, PSK/TCM Codec, Turbo Product

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 Software Flash Upgrading DoubleTalk Carrier-in-CarrierVerification Data Interfaces Remote ControlTurbo Product Coding 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 operationAlarm Interface Connector Pin Assignments Alarms ConnectorPin # Signal Function Name 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 LED Front Panel LED IndicatorsColor Condition ENT Diamond Keypad Presently used on all UnitsCLR 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 Config„Remote Remote ControlConfig„Remote„Serial„Interface Config„Remote„Serial„Baudrate Config„Remote„Serial„Interface„RS485 RS-485 Bus AddressConfig„Remote„Ethernet Config„Remote„Ethernet„Address Config„Remote„Ethernet„GatewayConfig„Remote„Ethernet„MAC Config„Remote„Ethernet„SNMPConfig„Remote„Ethernet„SNMP„Traps Config„Remote„Ethernet„SNMP„CommunitiesSnmp 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„Manual Manual Mode Config„Tx„Pwr Transmit Power Level ModeConfig„Tx„Pwr„AUPC Aupc 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„Scram Scrambler Config„Tx„Pwr„Combined Combined Transmit PowerConfig„Tx„Clk TX Clocking Mode 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 RangeConfig„Rx„Buf RX Buffer Clock Source Config„Rx„Descram DescramblerENT Config„Rx„Misc Rx Miscellaneous Config„Rx„Inv RX Inversion FunctionsConfig„Rx„Misc„Rxα RX Roll-Off α factor Config„Rx„Misc„EbNo Eb/No AlarmConfig„Rx„CnC CARRIER-IN-CARRIER→ 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 AlarmBUC Alarm Reference AlarmLNB 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 LOConfig„ODU„LNB„Voltage LNB Voltage Config„ODU„LNB LNBLNB DC Config„ODU„LNB„10MHz LNB 10MHz Config„ODU„LNB„Power-On/Off LNB POWER- ON/OFFConfig„ODU„LNB„Alarm LNB Alarm 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„Transmit Transmit Alarms Monitor„Alarms„Receive Receive AlarmsMonitor„Alarms„ODU Outdoor Unit Alarms Monitor„Event-Log EVENT-LOG or Stored Events Monitor„Rx-Params RECEIVE-PARAMETERSMonitor„Event-Log„View View Stored Events Log 023 30/11/02 Fault Demod Lock 3 ,ENTLog 024 30/11/97 Clear Demod Lock 3 ,ENT Monitor„Stats Link Statistics for grouped as modem only Link Statistics View Clear-All Config ENTMonitor„Stats„View View Link Statistics 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 onlyMode Norm if 2 Dig 2 I/O 2 RF Tx-CW Tx1-0 ENT Test Mode Bist ENT Spec-AnalyzerTest TX-CW Norm If Loop Dig Loop RF LoopTX-1,0 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 Information Info„Rem Remote Control InformationInfo Rem Tx Rx Buffer Frame Interface Mask Ref ID Tx 1140.000 05000.000 TUR 8P 17/18 S EXT -20.0 on N Info„Tx TX InformationTx C N 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 BrightnessUpdate Cpld to v1.x.x? No Yes ENT Current Active Image #1 Next Reboot Image #1 #2Programming Cpld Fast Utility„FAST Fast Code OptionsEdit 20 digit Fast Code 00000000000000000000 ENT View Options ENT Redun Not InstalledForward Error Correction Options Viterbi Decoding Summary ViterbiFor Against 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 IntroductionTurbo Product Coding processing delay comparison End-to-End Processing DelayAvailable TPC Modes 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 Target Eb/No Setting Aupc ParametersMax Range Demod Unlock AlarmCompensation Rate 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 InterfaceWeb Server Menu Tree Web Server Menu TreeLevel 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 ProductModulation HIGHER-ORDERCoding Hssi Automatic Uplink Power Control FutureData Rate Ranges Miscellaneous Framing Summary FutureFCC 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-controllerInstruction Code AddressSlot Address ‘=’ code Target to Controller is used in two ways Instruction Code Qualifier$ code target-to-controller is only used as follows Message Arguments Remote CommandsEnd Of Packet 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$ITF= ITF? ITF=ITF ITF#ESA= ESA? ESA=ESA ERF=TST= TST? TST=TST TST#AUP= AUP? AUP=AUP AUP#LBO= LBO? LBO=LBO LBO#HHC= HssiHHC? HHCApplies to CST? CST=CST CST#TIM= TIM? TIM=TIM TIM#IRM = IRM? IRM=IRM IRM#FBU= FBU? FBU=FBU FBU#CSD? CSD=CSD CSD#EID? Query CommandsUID? BytesFLT? =Change in faultREB? WHO?RNE= CC is Fault Code numbers, as in FLT? Or Infor Code, whichRNS=CR RX BER RSL?CRM? CDM?SWR? CFM?FRW? IMG= IMG? IMG=IMG IMG#ITP? Bulk Commands OGC= OGC? OGC=OGC OGC#BAD= Arguments For Command or Response to QueryBand Unit Only BCH= BOE=BCL= BUC LO BLO=BUT? BUCBPA? BSV?Control Band Unit Only Parameter Instruction Type Code Qualifier LNB PowerParameter Instruction Type Code Qualifier Parameter Command Instruction Type Code Qualifier BCT= BCT? BCT=BCT# BCT$SPF= SPM=SPS= SPM= SPM?DNI= DNI? DNI# DNI$ DNI DNI=DTS= Parameter Instruction Type Code Qualifier Drop TimeslotApplies to Cards grouped As modem 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 CnC Carrier Offset Symbol Rate Ratio1st CnC Example Adjacent Carriers, CnC Ratio and Rain Fade 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 tableEb/No Degradation At Site a Parameter Due To Fade At 3rd CnC Example Asymmetric Link With Rain FadePer Figure D- Qpsk Eb/No Degradation At Site B Parameter Due To Fade At ConclusionMetric Conversions 480 333 2200 Phone 480 333 2161 FAX