Comtech EF Data CDM-Qx User manual
Part Number MN/CDMQX.IOM Revision 7
IMPORTANT NOTE: The information contained in this document supersedes all previously published
information regarding these products. Product specifications are subject to change without prior notice.
CDM-Qx
Multi-Channel Satellite Modem
with DoubleTalk™Carrier-in-Carrier®
Installation and Operation Manual
(Includes data for the CDM-Qx and CDM-QxL Configurations)
For Firmware Versions 1.6.6/2.1.5 or higher
(see New in this Release – Section 1.4)
Copyright © Comtech EF Data, 2009. All rights reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA,480.333.2200, FAX: 480.333.2161
CDM-Qx
Multi-Channel Satellite Modem
with DoubleTalk™Carrier-in-Carrier®
Installation and Operation Manual
(Includes data for the CDM-Qx and CDM-QxL Configurations)
For Firmware Versions 1.6.6/2.1.5 or higher
(see New in this Release – Section 1.4)
Part Number MN/CDMQx.IOM
Revision 6
December 17, 2009
This page is intentionally blank.
iii
Table of Contents
TABLE OF CONTENTS.................................................................................................III
TABLES........................................................................................................................XII
FIGURES......................................................................................................................XII
PREFACE.................................................................................................................... XV
About this Manual...................................................................................................................... xv
Reporting Comments or Suggestions Concerning this Manual................................................ xv
Conventions and References...................................................................................................... xv
Trademarks ..............................................................................................................................xvi
Electrical Safety .........................................................................................................................xvi
Fuses ........................................................................................................................................xvi
Environmental.........................................................................................................................xvii
Installation...............................................................................................................................xvii
EMC (Electromagnetic Compatibility)..................................................................................xviii
Warranty Policy..........................................................................................................................xx
Limitations of Warranty............................................................................................................ xx
Exclusive Remedies.................................................................................................................xxi
Customer Support.....................................................................................................................xxii
Online Customer Support .......................................................................................................xxii
CHAPTER 1.INTRODUCTION................................................................................1–1
1.1Overview........................................................................................................................ 1–1
1.1.1Standard and Optional Features.................................................................................. 1–1
1.1.2DoubleTalk™ Carrier-in-Carrier®.............................................................................. 1–2
1.1.3Turbo Product Coding................................................................................................. 1–2
1.2Functional Description................................................................................................. 1–3
1.3Features.......................................................................................................................... 1–5
1.3.1Physical Description ................................................................................................... 1–5
1.3.2Compatibility .............................................................................................................. 1–5
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1.3.3Major Assemblies ....................................................................................................... 1–5
1.3.4Dimensional Envelope................................................................................................ 1–6
1.3.5Physical Features ........................................................................................................ 1–6
1.3.5.1Front Panel.......................................................................................................... 1–6
1.3.5.2Rear Panel........................................................................................................... 1–7
1.3.6Hardware Options....................................................................................................... 1–8
1.3.6.1CDM-Qx/QxL Hardware Options ...................................................................... 1–8
1.3.6.2CDM-QxL L-Band.............................................................................................. 1–9
1.3.7Data Interfaces ............................................................................................................ 1–9
1.3.8Verification ................................................................................................................. 1–9
1.3.9AUPC.......................................................................................................................... 1–9
1.3.10EDMAC................................................................................................................ 1–10
1.3.11Flash Upgrading Modem Firmware...................................................................... 1–10
1.3.12Fully Accessible System Topology (FAST)......................................................... 1–11
1.3.13Supporting Hardware and Software...................................................................... 1–12
1.4New in this Release......................................................................................................1–13
1.4.1CDM-Qx/QxL Firmware Release Notes ..................................................................1–13
1.5Summary of Specifications......................................................................................... 1–14
1.5.1Modulator.................................................................................................................. 1–14
1.5.2Demodulator ............................................................................................................. 1–15
1.5.3Data Interfaces .......................................................................................................... 1–18
1.5.4Automatic Uplink Power Control............................................................................. 1–18
1.5.5Data Rate Ranges...................................................................................................... 1–19
1.5.6Framing Summary (Future) ...................................................................................... 1–19
1.5.7Miscellaneous ........................................................................................................... 1–20
1.5.8Approvals.................................................................................................................. 1–20
CHAPTER 2.INSTALLATION.................................................................................2–1
2.1Unpacking...................................................................................................................... 2–1
2.2Mounting........................................................................................................................2–2
2.2.1Method A: Optional Rear-Mounting Support Brackets.............................................. 2–2
2.2.2Method B: Optional Bearingless Side-Railings.......................................................... 2–4
2.3Configuration ................................................................................................................ 2–4
2.4Select Internal IF Loop.................................................................................................2–5
2.5Connect External Cables.............................................................................................. 2–5
CHAPTER 3.REAR PANEL CONNECTORS .........................................................3–1
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3.1Connector Overview..................................................................................................... 3–1
3.2Base Chassis Connections.............................................................................................3–4
3.2.1Power Connector......................................................................................................... 3–4
3.2.1.1AC Power Connector.......................................................................................... 3–4
3.2.1.2DC Power Supply (CDM-QxL, Optional).......................................................... 3–4
3.2.2Ground Connector....................................................................................................... 3–4
3.2.3M&C 10/100BaseT Connector................................................................................... 3–5
3.2.4485/232 Connector...................................................................................................... 3–5
3.2.5Tx and Rx IF Connectors............................................................................................ 3–5
3.2.6Ext Ref Connector....................................................................................................... 3–5
3.3Data Interface Connectors...........................................................................................3–6
3.3.1Typical Alarms Connector.......................................................................................... 3–6
3.3.2Balanced G.703 Connector Tx/Rx Connector............................................................ 3–7
3.3.3Unbalanced G.703 Tx/Rx Connectors....................................................................... 3–7
3.3.4EIA-530 Data Interface Connector............................................................................. 3–8
3.3.5Quad E1 Data Interface Connectors ........................................................................... 3–9
3.3.6HSSI Interface and Connectors................................................................................. 3–10
3.3.6.1HSSI Interface Specifications........................................................................... 3–11
3.3.6.2HSSI Connector Pin Assignments....................................................................3–12
CHAPTER 4.FLASH UPGRADING ........................................................................4–1
4.1Flash Updating via Internet......................................................................................... 4–1
4.2Ethernet FTP Upload Procedure................................................................................. 4–2
CHAPTER 5.FRONT PANEL OPERATION ...........................................................5–1
5.1Front Panel Overview................................................................................................... 5–1
5.1.1USB Port..................................................................................................................... 5–1
5.1.2LED Indicators............................................................................................................ 5–2
5.1.3Keypad........................................................................................................................ 5–3
5.1.4Front Panel Vacuum Fluorescent Display (VFD)....................................................... 5–4
5.1.4.1VFD – Left-hand Display Area........................................................................... 5–4
5.1.4.1.1Modems......................................................................................................... 5–5
5.1.4.1.2Redundancy................................................................................................... 5–5
5.1.4.1.3Spectrum Analyzer........................................................................................ 5–6
5.1.4.2VFD – Right-Hand Display Area ....................................................................... 5–6
5.2Front Panel Operation – Opening Screen ..................................................................5–6
5.3MAIN MENU Screen.................................................................................................... 5–8
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5.4(MAIN MENU:) Config (Configuration).................................................................... 5–9
5.4.1CONFIG: Remote..................................................................................................... 5–10
5.4.1.1CONFIG: Remote ÆLocal.............................................................................. 5–10
5.4.1.2CONFIG: Remote ÆSerial.............................................................................. 5–10
5.4.1.3CONFIG: Remote ÆEthernet.......................................................................... 5–11
5.4.2CONFIG: Tx (Transmit)........................................................................................... 5–13
5.4.2.1CONFIG: Tx ÆFEC........................................................................................ 5–14
5.4.2.2CONFIG: Tx ÆMod........................................................................................ 5–14
5.4.2.3CONFIG: Tx ÆCode....................................................................................... 5–15
5.4.2.4CONFIG: Tx ÆData........................................................................................ 5–15
5.4.2.5CONFIG: Tx ÆFreq........................................................................................ 5–17
5.4.2.6CONFIG: Tx ÆOn/Off.................................................................................... 5–18
5.4.2.7CONFIG: Tx ÆPWR ...................................................................................... 5–18
5.4.2.8CONFIG: Tx ÆScram..................................................................................... 5–20
5.4.2.9CONFIG: Tx ÆClk ......................................................................................... 5–20
5.4.2.10CONFIG: Tx ÆInv...................................................................................... 5–21
5.4.2.11CONFIG: Tx ÆTxα.................................................................................... 5–21
5.4.3CONFIG: Rx (Receive) ............................................................................................ 5–22
5.4.3.1CONFIG: Rx ÆFEC........................................................................................ 5–23
5.4.3.2CONFIG: Rx ÆDemod................................................................................... 5–23
5.4.3.3CONFIG: Rx ÆCode ...................................................................................... 5–24
5.4.3.4CONFIG: Rx ÆData ....................................................................................... 5–24
5.4.3.5CONFIG: Rx ÆFreq........................................................................................ 5–25
5.4.3.6CONFIG: Rx ÆAcq ........................................................................................ 5–26
5.4.3.7CONFIG: Rx ÆDescram................................................................................. 5–26
5.4.3.8CONFIG: Rx ÆBuf......................................................................................... 5–27
5.4.3.9CONFIG: Rx ÆInv.......................................................................................... 5–28
5.4.3.10CONFIG: Rx ÆMisc................................................................................... 5–28
5.4.3.11CONFIG: Rx ÆCnC (CARRIER-IN-CARRIER®) .................................... 5–29
5.4.4CONFIG: Group ....................................................................................................... 5–30
5.4.4.1CONFIG: Group ÆModem............................................................................. 5–30
5.4.4.2CONFIG: Group ÆRedundancy ..................................................................... 5–30
5.4.5CONFIG: Frame ....................................................................................................... 5–32
5.4.5.1CONFIG: Frame ÆUnframed......................................................................... 5–32
5.4.5.2CONFIG: Frame ÆEDMAC, EDMAC-2 ....................................................... 5–32
5.4.5.3CONFIG: Frame ÆD&I++.............................................................................. 5–33
5.4.6CONFIG: Interface ................................................................................................... 5–34
5.4.6.1CONFIG: Interface ÆRS422, V.35, RS232.................................................... 5–34
5.4.6.2CONFIG: Interface ÆHSSI............................................................................. 5–34
5.4.6.3CONFIG: Interface ÆG.703 ........................................................................... 5–35
5.4.6.4CONFIG: Interface ÆQDI .............................................................................. 5–36
5.4.7CONFIG: Ref............................................................................................................ 5–37
5.4.8CONFIG: Mask......................................................................................................... 5–38
5.4.8.1CONFIG: Mask ÆTransmit ............................................................................ 5–38
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5.4.8.2CONFIG: Mask ÆReceive.............................................................................. 5–38
5.4.8.3CONFIG: Mask ÆReference........................................................................... 5–39
5.4.8.4CONFIG: Mask ÆBUC (CDM-QxL only)..................................................... 5–39
5.4.8.5CONFIG: Mask ÆBUC (CDM-QxL only)..................................................... 5–39
5.4.9CONFIG: ODU......................................................................................................... 5–39
5.4.9.1CONFIG: ODU ÆBUC................................................................................... 5–39
5.4.9.2CONFIG: ODU ÆLNB................................................................................... 5–42
5.5(MAIN MENU:) Monitor........................................................................................... 5–44
5.5.1MONITOR: Alarms.................................................................................................. 5–44
5.5.1.1MONITOR: Alarms ÆTransmit...................................................................... 5–44
5.5.1.2MONITOR: Alarms ÆReceive....................................................................... 5–44
5.5.1.3MONITOR: Alarms ÆUnit............................................................................. 5–44
5.5.1.4MONITOR: Alarms ÆODU ........................................................................... 5–45
5.5.2MONITOR: Rx-Params............................................................................................ 5–45
5.5.3MONITOR: Event-Log............................................................................................. 5–45
5.5.3.1MONITOR: Event-Log ÆView...................................................................... 5–46
5.5.3.2MONITOR: Event-Log ÆClear-All................................................................ 5–46
5.5.4MONITOR: Stats...................................................................................................... 5–47
5.5.4.1MONITOR: Stats ÆView ............................................................................... 5–47
5.5.4.2MONITOR: Stats ÆClear-All......................................................................... 5–48
5.5.4.3MONITOR: Stats ÆConfig............................................................................. 5–48
5.5.5MONITOR: AUPC................................................................................................... 5–48
5.5.6MONITOR: CnC (Carrier-in-Carrier®) .................................................................... 5–49
5.5.7MONITOR: ODU..................................................................................................... 5–50
5.5.7.1MONITOR: ODU ÆBUC............................................................................... 5–50
5.5.7.2MONITOR: ODU ÆLNB............................................................................... 5–50
5.6(MAIN MENU:) Test.................................................................................................. 5–51
5.6.1TEST: Mode.............................................................................................................. 5–51
5.6.2TEST: BIST.............................................................................................................. 5–52
5.6.2.1TEST: BIST ÆBERT-Config.......................................................................... 5–52
5.6.2.2TEST: BIST ÆBERT-Mon............................................................................. 5–53
5.6.2.3TEST: BIST ÆBERT-Control ........................................................................ 5–53
5.6.3TEST: Spec-Analyzer............................................................................................... 5–53
5.7(MAIN MENU:) Info (Information)..........................................................................5–54
5.7.1INFO: Rem................................................................................................................ 5–54
5.7.2INFO: Tx................................................................................................................... 5–55
5.7.3INFO: Rx .................................................................................................................. 5–56
5.7.4INFO: Buffer............................................................................................................. 5–56
5.7.5INFO: Frame............................................................................................................. 5–57
5.7.6INFO: Interface......................................................................................................... 5–57
5.7.7INFO: Mask.............................................................................................................. 5–57
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5.7.8INFO: Ref ................................................................................................................. 5–57
5.7.9INFO: ID................................................................................................................... 5–57
5.8(MAIN MENU:) Save/Load.......................................................................................5–58
5.8.1INFO: SAVE/LOAD ÆSave................................................................................... 5–58
5.8.2INFO: SAVE/LOAD ÆLoad .................................................................................. 5–58
5.9(MAIN MENU:) Utility .............................................................................................. 5–59
5.9.1UTILITY: RxBuffer.................................................................................................. 5–59
5.9.2UTILITY: Clock....................................................................................................... 5–59
5.9.3UTILITY: Ref........................................................................................................... 5–60
5.9.4UTILITY: ID ............................................................................................................ 5–60
5.9.5UTILITY: Display .................................................................................................... 5–60
5.9.6UTILITY: Firmware................................................................................................. 5–61
5.9.6.1UTILITY: Firmware ÆUpdate-CPLD............................................................ 5–61
5.9.6.2UTILITY: Firmware ÆInformation................................................................ 5–61
5.9.6.3UTILITY: Firmware ÆSelect ......................................................................... 5–62
5.9.7UTILITY: FAST....................................................................................................... 5–63
CHAPTER 6.ETHERNET MANAGEMENT.............................................................6–1
6.1Introduction................................................................................................................... 6–1
6.2Ethernet Management Interface Protocols ................................................................6–1
6.3SNMP Interface............................................................................................................. 6–1
6.3.1Management Information Base (MIB) Files............................................................... 6–2
6.3.2SNMP Community Strings.........................................................................................6–2
6.3.3SNMP Traps................................................................................................................ 6–2
6.4Telnet Interface............................................................................................................. 6–4
6.5Web Server (HTTP) Interface..................................................................................... 6–6
6.5.1Web Server Introduction............................................................................................. 6–6
6.5.2Web Server Menu Tree............................................................................................... 6–6
6.5.3User Login .................................................................................................................. 6–7
6.5.4Web Server Page Descriptions.................................................................................... 6–8
6.5.4.1Home Page.......................................................................................................... 6–8
6.5.4.1.1Home | Home Page........................................................................................ 6–8
6.5.4.1.2Home | Contact Page..................................................................................... 6–9
6.5.4.1.3Home | Support Page................................................................................... 6–10
6.5.4.2Admin Pages..................................................................................................... 6–11
6.5.4.2.1Admin | Access Page................................................................................... 6–11
6.5.4.2.2Admin | Remote Page.................................................................................. 6–13
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6.5.4.3Config Mdm (Configure Modem) Pages.......................................................... 6–14
6.5.4.3.1Config Mdm | Quick View.......................................................................... 6–14
6.5.4.3.1.1Config Mdm | Quick View | Config Pages........................................... 6–16
6.5.4.3.1.2Config Mdm | Quick View | Status Pages............................................ 6–20
6.5.4.3.1.3Config Mdm | Quick View | Test Pages............................................... 6–24
6.5.4.3.1.4Config Mdm | Quick View | Utility Pages ........................................... 6–28
6.5.4.3.2Config Mdm | Unit Status Page................................................................... 6–33
6.5.4.4ODU (Outdoor Unit) Pages (CDM-QxL only)................................................. 6–34
6.5.4.4.1ODU | BUC (Block Up Converter) Page .................................................... 6–34
6.5.4.4.2Config | LNB (Low Noise Block Down Converter) Page .......................... 6–35
6.5.4.5Maint (Maintenance) Page................................................................................ 6–36
CHAPTER 7.FORWARD ERROR CORRECTION OPTIONS ...............................7–1
7.1Introduction................................................................................................................... 7–1
7.2Viterbi ............................................................................................................................7–1
7.3Reed-Solomon Outer Codec......................................................................................... 7–2
7.3.1Closed Network Modes............................................................................................... 7–3
7.4Trellis Coding................................................................................................................ 7–3
7.5Turbo Product Codec (Hardware Option).................................................................7–4
7.5.1Introduction................................................................................................................. 7–4
7.5.2The Evolution of TPC in Comtech Products .............................................................. 7–5
7.5.3End-to-End Processing Delay..................................................................................... 7–5
7.5.4Comparison of all TPC Modes ...................................................................................7–6
CHAPTER 8.AUTOMATIC UPLINK POWER CONTROL (AUPC)........................8–1
8.1Introduction................................................................................................................... 8–1
8.2Setting AUPC Parameters............................................................................................ 8–1
8.2.1AUPC Target Eb/N0.................................................................................................... 8–2
8.2.2AUPC Max Range ...................................................................................................... 8–2
8.2.3AUPC Alarm............................................................................................................... 8–2
8.2.4Demod Unlock............................................................................................................ 8–2
8.3Compensation Rate....................................................................................................... 8–3
8.4Monitoring..................................................................................................................... 8–3
CHAPTER 9.DOUBLETALKTM CARRIER-IN-CARRIER® (CNC)...........................9–1
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9.1What is DoubleTalk Carrier-in-Carrier?...................................................................9–1
9.2Application Requirements............................................................................................9–1
9.3System Functionality ....................................................................................................9–2
9.4CnC Performance Characterization...........................................................................9–4
9.4.1Degradation Due To Carrier Spacing .........................................................................9–4
9.4.2Selecting The Adjacent Carrier Curve........................................................................ 9–7
9.4.3Carrier-in-Carrier®Ratio (CnC Ratio)........................................................................ 9–8
9.4.4Symbol Rate Ratio...................................................................................................... 9–9
9.4.5CnC Carrier Offset.................................................................................................... 9–10
9.4.61st CnC Example: Adjacent Carriers, CnC Ratio and Rain Fade.............................. 9–10
9.4.72nd CnC Example: CnC Ratio With Asymmetric Links........................................... 9–12
9.4.83rd CnC Example: Asymmetric Link With Rain Fade.............................................. 9–13
CHAPTER 10.EDMAC CHANNEL........................................................................10–1
10.1Theory Of Operation.................................................................................................. 10–1
10.2M&C Connection........................................................................................................ 10–2
10.3Setup Summary........................................................................................................... 10–3
CHAPTER 11.REDUNDANCY ..............................................................................11–1
APPENDIX A.CABLE DRAWINGS......................................................................... A-1
A.1Introduction...................................................................................................................A-1
A.1.1EIA-530 to RS-422/449 Data Cable.......................................................................A-2
A.1.2EIA-530 to V.35 Data Cable...................................................................................A-3
A.1.3EIA-530 Conversion Cable.....................................................................................A-4
A.1.4Switch Programming Cable....................................................................................A-5
APPENDIX B.FAST ACTIVATION PROCEDURE................................................. B–1
B.1Introduction...................................................................................................................B–1
B.2Activation Procedure....................................................................................................B–1
B.2.1Obtain Serial Numbers............................................................................................B–1
B.2.2View Currently Installed FAST Features ...............................................................B–3
B.2.2.1View Base Unit FAST Features..........................................................................B–3
B.2.2.2View Installed Module (Mod/Demod, Turbo) FAST Features ..........................B–4
B.2.3Acquire FAST Code ...............................................................................................B–5
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B.2.4Enter FAST Codes..................................................................................................B–5
B.2.4.1Entering the Base Unit FAST CODE .................................................................B–5
B.2.4.2Entering the Installed Module FAST CODE......................................................B–6
B.2.4.3Entering the Installed Module TPC Board FAST CODE...................................B–6
APPENDIX C.REMOTE CONTROL....................................................................... C–1
C.1Overview....................................................................................................................... C–1
C.2EIA-485......................................................................................................................... C–1
C.3EIA-232......................................................................................................................... C–2
C.4Basic Protocol............................................................................................................... C–2
C.5Packet Structure........................................................................................................... C–2
C.5.1Start of Packet.........................................................................................................C–3
C.5.2Target Address........................................................................................................C–3
C.5.3Address Delimiter...................................................................................................C–3
C.5.4Instruction Code......................................................................................................C–3
C.5.5Instruction Code Qualifier ......................................................................................C–3
C.5.6Optional Message Arguments.................................................................................C–5
C.5.7End of Packet..........................................................................................................C–5
C.6Remote Commands and Queries................................................................................ C–5
C.6.1Transmit (Tx) Commands and Queries...................................................................C–7
C.6.2Receive (Rx) Commands and Queries..................................................................C–11
C.6.3Common (Tx, Rx, or Modem) Commands and Queries.......................................C–15
C.6.4Queries..................................................................................................................C–24
C.6.5Bulk Commands and Queries ...............................................................................C–32
C.6.6BUC Commands and Queries – CDM-QxL ONLY.............................................C–33
C.6.7LNB Commands and Queries – CDM-QxL ONLY.............................................C–36
C.6.8Built-in BERT Commands and Queries (BER Tester).........................................C–37
C.6.9Spectrum Analyzer Commands and Queries – Rx Module ONLY......................C–39
C.6.10D&I++ (Drop & Insert) Commands and Queries (E1 CCS Only) – Modem ONLY.....C–40
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Tables
Table 1-1. CDM-Qx/QxL Rear Panel Connectors – Base Chassis............................................. 1–8
Table 1-2. FAST and FAST-accessible Hardware Options...................................................... 1–12
Table 3-1. Rear Panel External Connections.............................................................................. 3–3
Table 3-2. 485/232 (Remote Control) Connector Pin Assignments........................................... 3–5
Table 3-3. Alarms Interface Connector Pin Assignments .......................................................... 3–6
Table 3-4. Balanced G.703 Interface Connector Pin Assignments ............................................ 3–7
Table 3-5. RS-530 Data Interface Connector Pin Assignments ................................................. 3–8
Table 3-6. Quad E1 Data Interface J1-J4 Connector Pin Assignments...................................... 3–9
Table 3-7. Quad E1 Clock Interface J5, DB-9F Connector Pin Assignments............................ 3–9
Table 5-1. Prinicpal Menu Tree.................................................................................................. 5–7
Table 6-1. Viterbi Decoding Summary....................................................................................... 7–2
Table 6-2. Concatenated Reed-Solomon Coding Summary....................................................... 7–3
Table 6-3. 8-PSK/TCM Coding Summary ................................................................................. 7–4
Table 6-4. Available TPC Modes ............................................................................................... 7–5
Table 6-5. Turbo Product Coding processing delay comparison................................................ 7–6
Table 6-6. Turbo Product Coding Summary............................................................................... 7–7
Table 9-1. Rain Fade Degradation............................................................................................ 9–11
Table 9-2. Link Parameters / Results........................................................................................ 9–13
Table 9-3. Eb/No Degradation For Asymmetric 4.5-Meter Antenna At Site ‘A’ and 2.4-Meter
Antenna At Site ‘B’ .......................................................................................................... 9–14
Figures
Figure 1-1. CDM-Qx/QxL Multi-Channel Satellite Modem (CDM-QxL shown) ...................................1–1
Figure 1-2. CDM-Qx/QxL Open Network Satellite Modem Block Diagrams.........................................1–4
Figure 1-3. CDM-Qx/QxL Dimensional Envelope...................................................................................1–6
Figure 1-4. Front Panel View (CDM-Qx shown).....................................................................................1–6
Figure 1-5. CDM-Qx/QxL Rear Panel View............................................................................................1–7
Figure 1-6. Power Spectral Density Chart .............................................................................................1–15
Figure 2-1. Installation of Optional Rear-Mounting Support Brackets ....................................................2–3
Figure 2-2. Installation of Optional Side-Railings (FP/SL0006).............................................................2–4
Figure 3-1. CDM-Qx/QxL Rear Panel Configuration Examples..............................................................3–1
Figure 3-2. HSSI Interface Block Diagram ............................................................................................3–10
Figure 3-3. HSSI Interface Example.......................................................................................................3–11
Figure 4-1. Flash Update via Internet .......................................................................................................4–1
Figure 5-1. CDM-Qx/QxL – Front Panel View........................................................................................5–1
Figure 5-2. CDM-Qx/QxL Keypad...........................................................................................................5–3
Figure 5-3. Loopback..............................................................................................................................5–51
Figure 6-1. CDM-Qx/QxL Multi-Channel Satellite Modem Home page.................................................6–8
Figure 6-2. Home | Contact Information page..........................................................................................6–9
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Figure 6-3. Home | Customer Support page............................................................................................6–10
Figure 6-4. Admin | Access page............................................................................................................6–11
Figure 6-5. Admin | Remote page...........................................................................................................6–13
Figure 6-6. Config Mdm | Quick View Page Example...........................................................................6–14
Figure 6-7. Configuration Icon Group Examples ...................................................................................6–15
Figure 6-8. ‘Config Mdm | Quick View | Config’ Nested Pages – Base, Tx..........................................6–16
Figure 6-9. ‘Config Mdm | Quick View | Config’ Nested Pages – Rx, MD...........................................6–17
Figure 6-10. ‘Config Mdm | Quick View | Status’ Nested Pages – Base, Tx.........................................6–20
Figure 6-11. ‘Config Mdm | Quick View | Status’ Nested Pages – Rx, MD ..........................................6–21
Figure 6-12. ‘Config Mdm | Quick View | Test’ Nested Pages – Base, Tx............................................6–24
Figure 6-13. ‘Config Mdm | Quick View | Test’ Nested Pages – Rx, MD.............................................6–25
Figure 6-14. Nested Test Page with Spectrum Analyzer Mode ‘On’ – Rx, MD....................................6–27
Figure 6-15. ‘Config Mdm | Quick View | Utility’ Nested Pages – Base, Tx.........................................6–28
Figure 6-16. ‘Config Mdm | Quick View | Utility’ Nested Pages – Rx, MD..........................................6–29
Figure 6-17. Config Mdm | Unit Status Page..........................................................................................6–33
Figure 6-18. ODU | BUC page................................................................................................................6–34
Figure 6-19. ODU | LNB page................................................................................................................6–35
Figure 6-20. Maint | Unit Info page........................................................................................................6–36
Figure 6-1. Viterbi Decoding....................................................................................................................7–8
Figure 6-2. Viterbi with Concatenated R-S Outer Code...........................................................................7–9
Figure 6-3. 8-PSK/TCM Rate 2/3 with and without concatenated R-S Outer Code ..............................7–10
Figure 6-4. Comtech EF Data Turbo Product Codec Rate 3/4 QPSK, 8-PSK and 16-QAM.................7–11
Figure 6-5. Comtech EF Data Turbo Product Codec Rate 7/8 QPSK, 8-PSK and 16-QAM.................7–12
Figure 6-6. Rate 1/2 QPSK, Rate 17/18 QPSK and Rate 17/18 8-PSK..................................................7–13
Figure 6-7. Rate 21/44 BPSK and Rate 5/16 BPSK Turbo.....................................................................7–14
Figure 6-8. 16-QAM Viterbi, Rate 3/4 and Rate 7/8 with 220,200 R-S Outer Code..............................7–15
Figure 9-1. Traditional FDMA System (without CnC).............................................................................9–2
Figure 9-2. Same System Using CDM-Qx/QxL and DoubleTalkCarrier-in-Carrier...............................9–2
Figure 9-3. Adjacent Carrier: Case A (As Tested) and Case B (As Plotted)............................................9–5
Figure 9-4. QPSK 3/4 Turbo degradation versus relative carrier spacing (for two adjacent carriers) .........9–6
Figure 9-5. 8-PSK 3/4 Turbo degradation versus relative carrier spacing (for two adjacent carriers).........9–6
Figure 9-6. 16-QAM 3/4 Turbo degradation versus relative carrier spacing (for two adjacent carriers).....9–6
Figure 9-7. Adjacent Carrier Cases...........................................................................................................9–7
Figure 9-8. CnC Ratio...............................................................................................................................9–8
Figure 9-9. CnC Ratio For QPSK and 8-PSK...........................................................................................9–9
Figure 9-10. CnC Ratio For 16-QAM.......................................................................................................9–9
Figure 9-11. CnC Example.....................................................................................................................9–10
Figure 9-12. Link With Fading At Site ‘A’ ............................................................................................9–11
Figure 9-13. Asymmetric Link (Same Data Rate, Different Antennas)..................................................9–12
Figure 11-1. CDM-Qx/QxL Chassis Rear Panel Schematic...................................................................11–1
Figure A-1. : EIA-530 to RS-422/449 DCE Conversion Cable (CA/WR0049)......................................A-2
Figure A-2. : EIA-530 to V.35 DCE Conversion Cable (CA/WR0059)..................................................A-3
Figure A-3. EIA-530 DCE Conversion Cable (CA/WR9718-1) .............................................................A-4
Figure A-4. Switch Programming Cable..................................................................................................A-5
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PREFACE
About this Manual
This manual provides installation and operation information for the Comtech EF Data CDM-Qx
Multi-Channel Modem with DoubleTalk™ Carrier-in-Carrier®. This is a technical document
intended for earth station engineers, technicians, and operators responsible for the operation and
maintenance of the 70-140 MHz CDM-Qx and its L-Band counterpart, the CDM-QxL.
Revision 7 denotes a complete rewrite of the CDM-Qx Multi-Channel Satellite Modem Installation
and Operation Manual (CEFD P/N MN/CDMQX.IOM). It is intended replace all previous versions
of this document in their entirety. All content has been reorganized and updated to conform to
current Comtech EF Data Technical Publications Standards and Practices.
Reporting Comments or Suggestions Concerning this Manual
Comments and suggestions regarding the content and design of this manual will be appreciated.
To submit comments, please contact the Comtech EF Data Technical Publications Department:
Conventions and References
Metric Conversion
Metric conversion information is located on the inside back cover of this manual. This information
is provided to assist the operator in cross-referencing non-metric to metric conversions.
CDM-Qx Multi-Channel Satellite Modem with DoubleTalk Carrier-in-Carrier Revision 7
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Cautions and Warnings
WARNING indicates a potentially hazardous situation that, if not avoided, could
result in death or serious injury.
CAUTION indicates a hazardous situation that, if not avoided, may result in minor
or moderate injury. CAUTION may also be used to indicate other unsafe practices
or risks of property damage.
IMPORTANT or NOTE indicates information critical for proper equipment function.
Recommended Standard Designations
Recommended Standard (RS) Designations have been superseded by the new designation of the
Electronic Industries Association (EIA). References to the old designations are shown only when
depicting actual text displayed on the screen of the unit (RS-232, RS-485, etc.). All other references
in the manual will be shown with the EIA designations.
Trademarks
Carrier-in-Carrier is a registered trademark of Comtech EF Data Corporation. DoubleTalk is a
trademark of Applied Signal Technology, Inc. Windows is a trademark of the Microsoft
Corporation. Other product names mentioned in this manual may be trademarks or registered
trademarks of their respective companies and are hereby acknowledged.
Electrical Safety
The CDM-Qx/QxL Multi-Channel Satellite Modem has been shown to comply with safety standard
EN60950: Safety of Information Technology Equipment, including Electrical Business
Machines.
Observe the following: The CDM-Qx (70/140 MHz) is rated for operation over the range 100 to
240 VAC. It has a maximum power consumption of 120 watts, and draws a maximum of 1 amp.
The CDM-QxL (L-Band) is rated for operation over the range 100 to 240 VAC. It has a maximum
power consumption of 250 watts, and draws a maximum of 2 amps.
Fuses
CAUTION
FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES WITH
THE CORRECT TYPE AND RATING.
IMPORTANT
The user should carefully review the following information:
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AC Operation: The AC-powered CDM-Qx/QxL is fitted with two fuses – one each for line and
neutral connections. These are contained within the body of the IEC power inlet connector, behind a
small plastic flap.
For the CDM-Qx:
•For 115 and 230 VAC operation, use 2.0A, slow-blow 20mm fuses.
For the CDM-QxL:
•For 115 and 230 VAC operation, use T3.15A, slow-blow 20mm fuses.
DC Operation: The DC-powered CDM-Qx/QxL is fitted with one fuse for positive connection.
Thid fuse is contained within the body of the power inlet, behind a small plastic flap.
For the CDM-Qx:
•For 38 to 60 VDC operation, use X.XA, 20mm fuses.
For the CDM-QxL:
•For 38 to 60 VDC operation if the modem has no BUC power supply, use T3.15A,
slow-blow 20mm fuses
•For 38 to 60 VDC operation if the modem is fitted with internal BUC power supply,
use T8.0A, slow-blow 20mm fuses.
Environmental
The CDM-Qx/QxL must not be operated in an environment where the unit is exposed to extremes
of temperature outside the ambient range 0 to 50°C (32° to 122°F); precipitation, condensation, or
humid atmospheres above 95% RH; altitudes (non-pressurized) greater than 2000 meters;
excessive dust or vibration; flammable gases, corrosive or explosive atmospheres.
Operation in vehicles or other transportable installations that are equipped to provide a stable
environment is permitted. If such vehicles do not provide a stable environment, safety of the
equipment to EN60950 may not be guaranteed.
Installation
CAUTION
Do not plug in the modulator and demodulator cards while the modem
is powered on. Damage to the cards may result.
The CDM-Qx/QxL is shipped with a line inlet cable suitable for use in the country of operation.
If it is necessary to replace this cable, ensure the replacement has an equivalent specification.
Examples of acceptable ratings for the cable include HAR, BASEC and HOXXX-X. Examples of
acceptable connector ratings include VDE, NF-USE, UL, CSA, OVE, CEBEC, NEMKO,
DEMKO, BS1636A, BSI, SETI, IMQ, KEMA-KEUR and SEV.
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International Symbols
Symbol Definition Symbol Definition
~ Alternating Current Protective Earth
Fuse Chassis Ground
CDM-Qx/QxL AC Modem Installation: The installation and connection to the line supply must
be made in compliance to local or national wiring codes and regulations. The CDM-Qx/QxL is
designed for connection to a power system that has separate ground, line and neutral conductors.
The equipment is not designed for connection to a power system that has no direct connection to
ground.
CDM-Qx/QxL DC Modem Installation: The CDM-Qx/QxL DC input is connected to a nominal
48 VDC prime power source. The DC input is isolated from the chassis and from the DC output to
the BUC if equipped with internal BUC power supply. The chassis may be connected to a local
system ground using a separate wire to the ground stud on the back of the chassis. Since the DC
input is isolated, either the positive or the negative side of the DC input may be common with local
ground. Labeling on the chassis rear panel indicates the positive and negative terminals of the input
power socket.
Telecommunications Terminal Equipment Directive
In accordance with the Telecommunications Terminal Equipment Directive 91/263/EEC, this
equipment should not be directly connected to the Public Telecommunications Network.
CE Mark
Comtech EF Data declares that the CDM-Qx/QxL Multi-Channel Satellite Modem meets the
necessary requirements for the CE Mark.
RoHS Compliancy
This unit satisfies (with exemptions) the requirements specified in the European Union Directive on
the Restriction of Hazardous Substances, Directive 2002/95/EC, (EU RoHS).
EMC (Electromagnetic Compatibility)
In accordance with European Directive 89/336/EEC, the CDM-Qx/QxL Modem has been shown,
by independent testing, to comply with the following standards:
Emissions: EN 55022 Class B - Limits and methods of measurement of radio
interference characteristics of Information Technology Equipment.
(Also tested to FCC Part 15 Class B)
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