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Mocomtech CDM-QX operation manual Conclusion, Eb/No Degradation At Site B Parameter Due To Fade At

Models: CDM-QX

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CDM-Qx Satellite Modem				Revision 5
CnCPerformance Characterization				MN/CDMQx.IOM

	Eb/No Degradation At Site B
	Parameter	Due To Fade At	Due To Fade At
	Parameter	B (dB)	A (dB)
		B (dB)	A (dB)
	CnC Ratio @ Site B	-5.3	-5.3
	Uplink Fade @ Site B	3	-
	Uplink Fade @ Site A	-	6
	Faded CnC @ Site B	-8.3	+0.7
	Eb/No Degradation (dB) @ Site B	0.0	-0.1
	Per Figure D- QPSK	0.0	-0.1
	Per Figure D- QPSK

D.10 Conclusion

There are several conclusions for operation with CnC:

•Operate adjacent carriers with sufficient spacing so there is no degradation.

•Adjust the modulation and code rate to alter the CnC ratio

•Change the modulation and code rate to scale the symbol rate

•Maximum CnC ratio is 7 dB with plenty of margin

•Maximum CnC ratio is 10 dB with some degradation

•Eb/No degradation is relatively tolerant to fades

•QPSK is least sensitive to adjacent carrier and CnC ratio followed by 8-PSK then 16-QAM.

D–14

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Mocomtech CDM-QX operation manual Conclusion, Eb/No Degradation At Site B Parameter Due To Fade At

Contents

CDM-Qx RevisionPage Errata a Acquisition rangePage Errata B Page Errata C Rx Rs n/k ENT IESS-310 network 219/201Page Errata D Tx Rs n/k ENT IESS-310 network 219/201Page Part Number MN/CDMQx.IOM Revision January 20,2007 Customer Support Table of Contents Chapter Functional Description External Connections Evolution of TPC in Comtech Products Comparison of all TPC Modes11-1 Management Information Base MIB FilesAbout this Manual Electrical Safety International Symbols CE Mark Warranty Policy CDM-Qx Satellite Modem Revision Preface MN/CDMQx.IOM Xii Introduction CDM-Qx/QxLFeatures Software Flash Upgrading DoubleTalk Carrier-in-CarrierVerification Data Interfaces Remote ControlTurbo Product Coding Assembly Description Major AssembliesFast Options and Hardware Options FastFast Accessible Options Fast System TheoryImplementation Hardware OptionsSupporting Hardware and Software Band CompatibilityCDM-Qx Satellite Modem Revision Introduction MN/CDMQx.IOM Installation UnpackingOptional Rear-Mounting Installation Bracket MountingInstallation of the Optional Mounting Brackets Configuration Select Internal if LoopConnect External Cables Observe the followingFunctional Description Page Modem Block Diagram Page Connections Front Panel LEDRear Panel Rear PanelPage Modem Rear Panel Connectors Name Ref. Desig Connector Type FunctionBNC IECRF Output 75 or 50Ω 2 M&C 10/100BaseT Connector 3 485/232 ConnectorRemote Control Interface Connector Pin Assignments Use for 2-wire RS-485 operationAlarm Interface Connector Pin Assignments Alarms ConnectorPin # Signal Function Name Balanced G.703 Connector Tx/Rx Connector Unbalanced G.703 Tx/Rx ConnectorsBalanced G.703 Interface Connector Pin Assignments Pin # Signal Function Name Direction7 RS-530 Data Interface Connector Pin # Generic Signal Description Direction RS-422 RSLvds RS-232 Circuit #Quad E1 Data Interface Connectors Xx6. Quad E1 Data Interface J1 Connector Pin AssignmentsRX and TX if Connectors AC Power ConnectorDC 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 Left-Hand Display Area ModemsRight Hand Display Area TXFRedundancy MD MDAccessing the Display Area Spectrum AnalyzerRight-Hand Display Area RXSPrinciple Menu Tree Main Menu Config Monitor Test Info Save/Load Util ODU Opening ScreenComtech EF Data CDM-Qx Firmware Version ODUConfig Config Remote Tx Rx Group Frame Interface Ref Mask ODUConfig„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„Gateway Config„Remote„Ethernet„AddressConfig„Remote„Ethernet„MAC Config„Remote„Ethernet„SNMPConfig„Remote„Ethernet„SNMP„Traps Config„Remote„Ethernet„SNMP„CommunitiesSnmp Trap Community , ENT comtech Trap Version ENT SNMPv1 SNMPv2Trap IP Addr#1 ENT Trap IP Addr#2 ENTConfig„Tx Transmit Tx FEC Mod Code Data Freq On/Off Pwr Scram Clk Inv TxαConfig„Tx„FEC TX FEC Type Config„Tx„Mod Modulation SchemeTx FEC Vit Vit+RS TCM+RS TPCConfig„Tx„Code TX Code Rate Config„Tx„Data TX Data RateTx Code Rate 5/16 21/44 1/2 3/4 17/18 Tx Data Rate 05000.000kbps Sym02500.000kspsConfig„Tx„Freq TX if Frequency Tx if Freq 1156.3456 MHzConfig„Tx„On/Off Transmit ON/OFF Control Tx if Freq 1156.3456 MHz RF=14156.3456 ENTTx 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 Target Eb/No Config„Tx„Pwr„AUPC MAX RangeConfig„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 Config„Tx„Inv TX Inversion Functions Tx Inversion functions Spectrum Data Clock ,ENTTx Spectral Inversion Normal Inverted Tx Data SenseConfig„Tx„Txα TX Roll-Off α factor Config„Rx ReceiveTx Roll-off 20% 35% ENT RxFEC Demod Code Data Freq Acq Descram Buf Inv Misc CnCConfig„Rx„FEC RX FEC Type Rx FEC Vit Vit+RSTCM+RS Case Rules CommentConfig„Rx„Demod Demodulation Scheme Config„Rx„Code RX Code RateDemodulation Bpsk Qpsk 8-PSK 16-QAM Rx Code Rate 5/16 21/44 1/2 3/4 7/8 17/18Config„Rx„Data RX Data Rate Rx Data Rate 05000.000kbps Sym02500.000kspsConfig„Rx„Freq RX Frequency Config„Rx„Acq Demod Acquisition RangeRx if Freq1156.3456 MHz RF=12156.3456 ENT Demod Acquisition RangeConfig„Rx„Buf RX Buffer Clock Source Config„Rx„Descram DescramblerENT Config„Rx„Inv RX Inversion Functions Config„Rx„Misc Rx MiscellaneousConfig„Rx„Misc„Rxα RX Roll-Off α factor Config„Rx„Misc„EbNo Eb/No AlarmConfig„Rx„CnC CARRIER-IN-CARRIER→ Config„Rx„CnC„Mode CnC→ Mode of Operation Config„Rx„CnC„FrqOffs CnC Frequency OffsetPlease Check TX Power Level Please WaitConfig„Rx„CnC„SrchDelay CnC Search Delay Config„Rx„CnC„ReAcq CnC RE-ACQUISITION TimeConfig„Group Grouping MOD/DEMOD Cards Config„Group„ModemConfig„Group„Redundancy Config„Group„Redundancy„ConfigConfig„Group„Redundancy„Config „11 Config„Group„Redundancy„Config „12Config„Group„Redundancy„Mode Config„Group„Redundancy„Mode„ManualConfig„Frame Framing Mode Config„Frame„Unframed UnframedEdmac Mode Framing mix AUPC-OnlyAUPC+EDMAC Master SlaveConfig„Frame„D&I++ D&I++ Distant-end Base Address0240 Address This Slave Unit ENTConfig„Interface Data Interface Interface RS422 V.35 RS232Hssi ASI G.703 QDI None RTS/CTS operation , ENT Loop,RTS Controls Tx OutHDB3 AMI T1 Line Length Feet 703 E1 Line Code HDB3 AMI , ENTHDB3 AMI Config„Ref Reference Oscillator Config„Mask MaskAlarm Mask Transmit Receive Reference BUC LNB ,ENT Frequency Reference Internal MHz ENTTx Alarm Mask Tx-FIFO BPV Tx-AIS ENT Tx-FIFO Alarm ENT Active MaskedRx Alarm Mask AGC Eb/No Rx-AIS Buffer AGC AlarmBUC Alarm Reference AlarmLNB Alarm Config„ODU Outdoor Unit for L-Band Unit Only Config„ODU„BUC Block Upconverter BUCODU BUC LNBConfig„ODU„BUC„M&C-FSK M&C FSK Config„ODU„BUC„M&C-FSK„Address FSK CommsConfig„ODU„BUC„M&C-FSK„Address FSK Address BUC M&CConfig„ODU„BUC„M&C-FSK„Tx-On/Off FSK TX-ON/OFF Config„ODU„BUC„DC-Pwr BUC DC PowerConfig„ODU„BUC„10MHz BUC 10MHz Config„ODU„BUC„Alarm BUC AlarmConfig„ODU„BUC„Delay BUC Delay BUC Current Alarm Upper Limit1200mABUC Current Alarm Lower Limit1200mA Power-On DelayConfig„ODU„BUC„LO BUC LO Config„ODU„BUC„Mix BUC MIXConfig„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„LO LO Config„ODU„LNB„Mix MIXLNB Current Alarm Lower Limit 050mA ENT LNB Frequency MixMonitor„Alarms Alarms Monitor„Alarms„Unit Unit AlarmsMonitor„Alarms„Transmit Transmit Alarms Monitor„Alarms„Receive Receive AlarmsMonitor„Alarms„ODU Outdoor Unit Alarms Monitor„Rx-Params RECEIVE-PARAMETERS Monitor„Event-Log EVENT-LOG or Stored EventsMonitor„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 Monitor„Stats„Config Configure Stats Stats Logging Interval Disabled,ENTMonitor„Stats„Clear-All Clear ALL Stats Clear all Stored Stats? No YesMonitor„AUPC Monitor AUPCfor grouped as modem only Monitor„CnC Monitor CARRIER-IN-CARRIER CnCMonitor„ODU Monitor ODU for L-Band Unit only ODU LNBMode 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 Bist BERT-Config BERT-Mon BERT-Control ENT Bert Config Tx=ON Rx=ON Tx-Pat=2047 Rx-Pat=2047Bert Monitor Errs=0000253 BER=8.5E-07 Bert Control 10E-3Err=OFF Restart=NO SyncThres=256Mode Config Spectrum Analyzer ModeConfig 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 Info„Rx RX Information Rx 1140.000 05000.000 TUR 8P 17/18 D RX BUF +/-32k NRx C N N Demod Sweep Acquisition rangeBuffer Enabled Tx=Rx ENT Info„Buffer Buffer InformationInfo„Frame Framing and Edmac Information Info„Interface Interface InformationInfo„Mask Alarm Mask Information Info„Ref Frequency ReferenceInfo„ID Circuit Identification Character TST MessageSave/Load„Save Save Configuration No YESSave/Load„Load Load Configuration New Config has been Loaded From LocationEmpty ENT Contains No Data! ENTUtility„RxBuffer Buffer Recenter Utility„Clock REAL-TIME ClockUtility RxBuffer Clock Ref ID Display Firmware Fast Real-Time Clock , ,ENT Time=120000 Date24/04/03Utility„Ref Reference Adjust Warm-up delay ENTUtility„ID Circuit Identification Internal FreqUtility„Display Display Brightness Utility„Firmware FirmwareUpdate Cpld to v1.x.x? No Yes ENT Current Active Image #1 Next Reboot Image #1 #2Programming Cpld Utility„FAST Fast Code Options FastView Options ENT Redun Not Installed Edit 20 digit Fast Code 00000000000000000000 ENTForward Error Correction Options Viterbi Decoding Summary ViterbiFor Against Reed-Solomon Outer Codec Closed Network Modes Concatenated R-S Coding SummaryTrellis Coding PSK/TCM Coding SummaryTurbo Product Codec Hardware Option Introduction Evolution of TPC in Comtech ProductsTurbo Product Coding processing delay comparison End-to-End Processing DelayAvailable TPC Modes Comparison of all TPC Modes Turbo Product Coding Summary Viterbi Decoding BERViterbi with PSK/TCM Rate 2/3 Decoding, withWithout 219, 201 RS Outer CodeCDM-Qx Satellite Modem Forward Error Correction Options Comtech Turbo Product Codec Rate 3/4 QPSK, 8-PSK 16-QAMComtech Turbo Product Codec Rate 7/8 QPSK, 8-PSK 16-QAM Comtech Turbo Product Codec Rate 21/44 Bpsk and Rate 5/16 Bpsk Turbo BPSK/QPSKBER Page Edmac Channel Theory Of OperationM&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 Management Ethernet Management Interface ProtocolsWeb Server Http Interface WebWeb Server Menu Tree Web Server Menu TreeLevel 11-4 11-5 11-6 11-7 Snmp Interface Management Information Base MIB FilesSnmp Community Strings Snmp TrapsAlarms and Faults SNMPv2 notifications Telnet Interface11-11 11-12 Page Page Modulator FECPower Spectral Density Referred to symbol rateComtech EF Data CDM-Qx TransmitDemodulator ViterbiPSK/TCM Codec Turbo ProductModulation HIGHER-ORDERCoding Automatic Uplink Power Control Future HssiData Rate Ranges Miscellaneous Framing Summary FutureFCC Page Ethernet FTP upload procedure Appendix B. Flash UpgradingConstruction Sector CDM-Qx Satellite Modem Revision Flash Upgrading MN/CDMQx.IOM Appendix C. Remote Control RS-485RS-232 Basic ProtocolPacket Structure Start Of PacketController-to-target Example 0135/TRQ=70.2345CR Target-to-controllerInstruction Code AddressSlot Address Instruction Code Qualifier ‘=’ code Target to Controller is used in two ways$ 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$ITF= ITF= ITF?ITF ITF#ESA= ESA= ESA?ESA ERF=TST= TST= TST?TST TST#AUP= AUP= AUP?AUP AUP#LBO= LBO= LBO?LBO LBO#Hssi HHC=HHC? HHCApplies to CST= CST?CST CST#TIM= TIM= TIM?TIM TIM#IRM= IRM = IRM?IRM IRM#FBU= FBU= FBU?FBU FBU#CSD= CSD?CSD CSD#Query Commands EID?Bytes UID?=Change in fault FLT?WHO? REB?CC is Fault Code numbers, as in FLT? Or Infor Code, which RNE=RNS=CR RSL? RX BERCRM? CDM?SWR? CFM?FRW? IMG= IMG= IMG?IMG IMG#ITP? Bulk Commands OGC= OGC= OGC?OGC OGC#BAD= Arguments For Command or Response to QueryBand Unit Only BOE= BCH=BCL= BUC LO BLO=BUC BUT?BPA? BSV?Parameter Instruction Type Code Qualifier LNB Power Control Band Unit OnlyParameter Instruction Type Code Qualifier Parameter Command Instruction Type Code Qualifier BCT= BCT= BCT?BCT# BCT$SPM= SPF=SPS= SPM= SPM?DNI= DNI= DNI? DNI# DNI$ DNIDTS= Parameter Instruction Type Code Qualifier Drop TimeslotApplies to Cards grouped As modem CDM-Qx Satellite Modem Revision Remote Control MN/CDMQx.IOM Performance Characterization Carrier-in-CarrierDescriptionDegradation Due To Carrier Spacing Figure D-1. Adjacent Carrier a As Tested and BAs PlottedCarrier Spacing For 20% RolloffDegradation ≤ 0.5 dB Carrier Spacing For 35% RolloffPSK 3/4 Turbo, α = 35% Selecting The Adjacent Carrier Curve Figure D-5. Adjacent Carrier CasesCurve To Use In Figure D-2, Error Carrier-in-Carrier Ratio CnC RatioCase 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 DL Fade UL Fade Site a Site B Site a Site BComment Per Figure DFigure D-10. Link With Fading At Site a 2nd CnC Example CnC Ratio With Asymmetric Links Link parameters and results are summarized in the table Parameters Site a Site BEb/No Degradation At Site a Parameter Due To Fade At 3rd CnC Example Asymmetric Link With Rain FadePer Figure D- Qpsk Conclusion Eb/No Degradation At Site B Parameter Due To Fade AtMetric Conversions 480 333 2200 Phone 480 333 2161 FAX