Comtech EF Data CDM-750 User manual
Part Number MN-CDM750 Revision 1
CD
M
-
75
0
Advanced High-Speed Trunking Modem
Installation and Operation Manual
For Firmware Version 1.3.1 or higher
IMPORTANT NOTE: The information contained in this document supersedes all previously published
information regarding this product. Product specifications are subject to change without prior notice.
Copyright © 2010 Comtech EF Data. 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-750
Advanced High-Speed Trunking Modem
Installation and Operation Manual
For Firmware Version 1.3.1 or higher
Part Number MN-CDM750
Revision 1
December 7, 2010
This page is intentionally blank.
iii
Table of Contents
TABLE OF CONTENTS ..............................................................................................................III
TABLES...................................................................................................................................... XI
FIGURES.................................................................................................................................... XI
PREFACE................................................................................................................................. XIII
About this Manual ...................................................................................................................................xiii
Reporting Comments or Suggestions Concerning this Manual........................................................................... xiii
Conventions and References...................................................................................................................xiii
Metric Conversion................................................................................................................................................... xiii
Recommended Standard Designations .................................................................................................................. xiii
Trademarks............................................................................................................................................................... xiii
Cautions and Warnings...........................................................................................................................xiv
Electrical Safety and Compliance...........................................................................................................xiv
Fuses ................................................................................................................................................................. xiv
Low Voltage Directive (LVD)................................................................................................................................ xiv
International Symbols................................................................................................................................................xv
Installation..................................................................................................................................................................xv
Environmental............................................................................................................................................................xv
Telecommunications Terminal Equipment Directive............................................................................xv
CE Mark....................................................................................................................................................xv
RoHS Compliance....................................................................................................................................xvi
EMC (Electromagnetic Compatibility) Compliance.............................................................................xvi
Warranty Policy......................................................................................................................................xvii
Limitations of Warranty......................................................................................................................................... xvii
Exclusive Remedies...............................................................................................................................................xviii
Customer Support....................................................................................................................................xix
Online Customer Support........................................................................................................................................ xix
CHAPTER 1.INTRODUCTION .............................................................................................1–1
1.1Overview......................................................................................................................................1–1
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1.2Functional Description ...............................................................................................................1–2
1.3Features........................................................................................................................................1–3
1.3.1Physical Description............................................................................................................................. 1–3
1.3.2Major Assemblies................................................................................................................................. 1–4
1.3.2.1Standard Assemblies.........................................................................................................1–4
1.3.2.2Optional Assemblies.........................................................................................................1–4
1.3.3Dimensional Envelope ......................................................................................................................... 1–5
1.3.4Physical Features................................................................................................................................... 1–6
1.3.4.1Front Panel........................................................................................................................1–6
1.3.4.2Rear Panel.........................................................................................................................1–6
1.3.5Hardware Options................................................................................................................................. 1–7
1.3.5.1Standard Hardware............................................................................................................1–7
1.3.5.2Optional Hardware............................................................................................................1–7
1.3.6Data Interfaces....................................................................................................................................... 1–7
1.3.7Verification............................................................................................................................................ 1–7
1.3.8Flash Upgrading Modem Firmware.................................................................................................... 1–8
1.3.9Fully Accessible System Topology (FAST)....................................................................................... 1–8
1.3.10Supporting Hardware and Software .................................................................................................... 1–9
1.4Summary of Specifications.......................................................................................................1–10
1.4.1System Specifications......................................................................................................................... 1–10
1.4.2Environmental and Physical............................................................................................................... 1–10
1.4.3Base Unit Connectors......................................................................................................................... 1–11
1.4.4Test Functions..................................................................................................................................... 1–11
1.4.5Modulator (Dual IF) ........................................................................................................................... 1–11
1.4.6Demodulator (Dual IF)....................................................................................................................... 1–12
1.4.7Adaptive Coding and Modulation (ACM)........................................................................................ 1–13
1.4.8DoubleTalkTM Carrier-in-Carrier®(CnC).......................................................................................... 1–14
1.4.9Approvals ............................................................................................................................................ 1–14
CHAPTER 2.INSTALLATION ..............................................................................................2–1
2.1Unpacking and Inspection..........................................................................................................2–1
2.2Mounting......................................................................................................................................2–2
2.2.1Method A: Optional Rear-Mounting Support Bracket Kit (KT-0000168) ................................. 2–2
2.2.2Method B: Optional Bearingless Side-Railing Set (FP/SL0006)...................................................... 2–3
CHAPTER 3.REAR PANEL CONNECTORS AND PINOUTS.............................................3–1
3.1Connector Overview...................................................................................................................3–1
3.2IF Connections ............................................................................................................................3–3
3.2.1Rx Connectors....................................................................................................................................... 3–3
3.2.2Tx Connectors....................................................................................................................................... 3–3
3.2.3J10 | TX MON Connector, Type ‘SMA’............................................................................................ 3–3
3.3Utility Connections......................................................................................................................3–4
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3.3.1J1 | ALARM Connector, DB-15M...................................................................................................... 3–4
3.3.2J2 | REDUNDANCY Connector, DB-9F........................................................................................... 3–4
3.3.3J3 | REMOTE Connector, DB-9M...................................................................................................... 3–5
3.3.4J4 | MGMT Connector, RJ-45F........................................................................................................... 3–5
3.3.5J8 | EXT REF Connector, BNC........................................................................................................... 3–6
3.4Terrestrial Data Connections.....................................................................................................3–7
3.4.1J5 | DATA, J6 | DATA Connections, RJ-45F..................................................................................... 3–7
3.4.2J7 | OPTICAL Connection, 1000Base-SX Cage................................................................................ 3–8
3.4.2.1Optional Optical Gigabit Ethernet Interface (CEFD P/N IC-0000058)............................3–8
3.4.3PIIC Data Interfaces.............................................................................................................................. 3–9
3.4.3.1G.703 E3/T3 PIIC Data Interface .....................................................................................3–9
3.5Power / Ground Connections...................................................................................................3–10
3.5.1Alternating Current Power Connector............................................................................................... 3–10
3.5.2Direct Current Power Connector (FUTURE)................................................................................... 3–10
3.5.3Chassis Ground Connector................................................................................................................. 3–10
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
5.1Introduction.................................................................................................................................5–1
5.1.1LED Indicators...................................................................................................................................... 5–2
5.1.2Keypad................................................................................................................................................... 5–3
5.1.3Vacuum Fluorescent Display (VFD)................................................................................................... 5–3
5.2CDM-750 Front Panel Menus....................................................................................................5–4
5.2.1Opening Screen..................................................................................................................................... 5–4
5.2.2Select: (Main) Menu............................................................................................................................. 5–5
5.2.2.1Select: Configuration ........................................................................................................5–6
5.2.2.1.1CONFIG: Intf (Configure Interface)...........................................................................5–7
5.2.2.1.1.1(CONFIG) INTF: PIICX = G703.........................................................................5–7
5.2.2.1.1.2(CONFIG) INTF: GBEIX..................................................................................5–10
5.2.2.1.1.3(CONFIG) INTF: OptInst..................................................................................5–11
5.2.2.1.2CONFIG: Tx.............................................................................................................5–12
5.2.2.1.2.1(CONFIG) Tx : IF..............................................................................................5–12
5.2.2.1.2.2(CONFIG) Tx: Freq (Frequency).......................................................................5–12
5.2.2.1.2.3(CONFIG) Tx: Power ........................................................................................5–13
5.2.2.1.2.4(CONFIG) Tx: Frame ........................................................................................5–13
5.2.2.1.2.5(CONFIG) Tx: Mod (Modulation).....................................................................5–13
5.2.2.1.2.6(CONFIG) Tx: Data...........................................................................................5–13
5.2.2.1.2.7(CONFIG) Tx: Pilot...........................................................................................5–15
5.2.2.1.3CONFIG: Rx.............................................................................................................5–17
5.2.2.1.3.1(CONFIG) Rx: IF...............................................................................................5–17
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5.2.2.1.3.2(CONFIG) Rx: Freq (Frequency).......................................................................5–17
5.2.2.1.3.3(CONFIG) Rx: Frame........................................................................................5–17
5.2.2.1.3.4(CONFIG) Rx: Mod (Modulation).....................................................................5–18
5.2.2.1.3.5(CONFIG) Rx: Data...........................................................................................5–18
5.2.2.1.3.6(CONFIG) Rx: Pilot...........................................................................................5–18
5.2.2.1.3.7(CONFIG) Rx: EsNo .........................................................................................5–19
5.2.2.1.4CONFIG: Clocks.......................................................................................................5–19
5.2.2.1.4.1(CONFIG) Clocking: Freq-Ref..........................................................................5–19
5.2.2.1.4.2(CONFIG) Clocking: Int-Ref-Adjust.................................................................5–19
5.2.2.1.5CONFIG: ACM (Adaptive Coding and Modulation)...............................................5–20
5.2.2.1.5.1(CONFIG) ACM Config: Min/Max-ModCod ...................................................5–20
5.2.2.1.5.2(CONFIG) ACM Config: Unlock-Action..........................................................5–21
5.2.2.1.5.3(CONFIG) ACM Config: Target-Es/No-Margin...............................................5–21
5.2.2.1.5.4(CONFIG) ACM Config: Degradation..............................................................5–22
5.2.2.1.6CONFIG: CnC ..........................................................................................................5–22
5.2.2.1.6.1(CONFIG) Carrier-in-Carrier: Mode .................................................................5–22
5.2.2.1.6.2(CONFIG) Carrier-in-Carrier: Search-Delay.....................................................5–23
5.2.2.1.7CONFIG: Mask.........................................................................................................5–23
5.2.2.1.8CONFIG: Remote (Remote Control)........................................................................5–24
5.2.2.1.8.1(CONFIG) Remote Control: Serial or Ser+Ethernet..........................................5–24
5.2.2.1.8.2(CONFIG) Remote Control: Inband ..................................................................5–25
5.2.2.1.9CONFIG: IP..............................................................................................................5–25
5.2.2.1.9.1(CONFIG) IP Config: Addresses.......................................................................5–25
5.2.2.1.9.2(CONFIG) IP Config: SNMP.............................................................................5–26
5.2.2.1.10CONFIG: Comp......................................................................................................5–28
5.2.2.2Select: Test......................................................................................................................5–29
5.2.2.2.1TEST: Mode..............................................................................................................5–29
5.2.2.2.2TEST: BERT.............................................................................................................5–31
5.2.2.2.2.1TEST: BERT ÆConfig.....................................................................................5–31
5.2.2.2.2.2TEST: BERT ÆMonitor...................................................................................5–31
5.2.2.2.3TEST: Comp.............................................................................................................5–31
5.2.2.3Select: Monitor................................................................................................................5–32
5.2.2.3.1Monitor: Live-Alarms...............................................................................................5–32
5.2.2.3.2Monitor: Stored-Events.............................................................................................5–33
5.2.2.3.3Monitor: ACM ..........................................................................................................5–33
5.2.2.3.4Monitor: Rx-Params (Rx Parameters).......................................................................5–33
5.2.2.3.5Monitor: CnC (Carrier-in-Carrier Parameters) .........................................................5–34
5.2.2.3.6Monitor: Stats (Statistics)..........................................................................................5–34
5.2.2.3.6.1Monitor: Stats ÆIP...........................................................................................5–35
5.2.2.3.6.2Monitor: Stats ÆBasebandFraming.................................................................5–36
5.2.2.3.6.3Monitor: Stats ÆCompression..........................................................................5–37
5.2.2.3.7Monitor: Buffer.........................................................................................................5–38
5.2.2.4Select: Info (Information) ...............................................................................................5–38
5.2.2.4.1Info: ID......................................................................................................................5–38
5.2.2.4.2Info: Intf....................................................................................................................5–38
5.2.2.4.3Info: Tx .....................................................................................................................5–39
5.2.2.4.4Info: Rx.....................................................................................................................5–39
5.2.2.4.5Info: Clocks...............................................................................................................5–40
5.2.2.4.6Info: ACM.................................................................................................................5–40
5.2.2.4.7Info: CnC ..................................................................................................................5–40
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5.2.2.4.8Info: Misc..................................................................................................................5–40
5.2.2.4.9Info: Remote .............................................................................................................5–40
5.2.2.4.10Info: Comp..............................................................................................................5–41
5.2.2.5Select: Store/Ld (Store/Load) .........................................................................................5–41
5.2.2.6Select: Utility ..................................................................................................................5–41
5.2.2.6.1Utility: Set-RTC........................................................................................................5–42
5.2.2.6.2Utility: Display-Brightness .......................................................................................5–42
5.2.2.6.3Utility: LED ..............................................................................................................5–42
5.2.2.6.4Utility: 1:1.................................................................................................................5–42
5.2.2.6.5Utility: Circuit ID......................................................................................................5–43
5.2.2.6.6Utility: Firmware.......................................................................................................5–43
5.2.2.6.6.1(UTILITY) Firmware Images: Info ...................................................................5–43
5.2.2.6.6.2(UTILITY) Firmware Images: Select ................................................................5–44
5.2.2.7Select: FAST...................................................................................................................5–44
5.2.2.7.1FAST: Options..........................................................................................................5–44
5.2.2.7.1.1(FAST) FAST Options: Set................................................................................5–45
5.2.2.7.1.2(FAST) FAST Options: View............................................................................5–45
5.2.2.7.2FAST: Demo-Mode ..................................................................................................5–45
5.2.2.7.3FAST: CnC ...............................................................................................................5–46
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....................................................................................... 6–1
6.3.2SNMP Community Strings.................................................................................................................. 6–2
6.3.3SNMP Traps.......................................................................................................................................... 6–2
6.4Telnet Interface...........................................................................................................................6–3
6.5Web Server (HTTP) Interface...................................................................................................6–5
6.5.1Interface Introduction ........................................................................................................................... 6–5
6.5.2Interface Access.................................................................................................................................... 6–5
6.5.3Interface Menu Tree ............................................................................................................................. 6–6
6.5.4Web Server Interface – Page Descriptions.......................................................................................... 6–7
6.5.4.1Home pages.......................................................................................................................6–7
6.5.4.1.1Home | Home ..............................................................................................................6–7
6.5.4.1.2Home | Contact............................................................................................................6–8
6.5.4.1.3Home | Support ...........................................................................................................6–9
6.5.4.2Admin (Administration) pages........................................................................................6–10
6.5.4.2.1Admin | Access .........................................................................................................6–10
6.5.4.2.2Admin | SNMP..........................................................................................................6–12
6.5.4.3Configuration pages........................................................................................................6–13
6.5.4.3.1Configuration | Modem.............................................................................................6–13
6.5.4.3.2Configuration | Utilities.............................................................................................6–14
6.5.4.4Status pages.....................................................................................................................6–16
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6.5.4.4.1Status | Status............................................................................................................6–16
6.5.4.4.2Status | Logs..............................................................................................................6–17
6.5.4.4.3Status | Info ...............................................................................................................6–18
6.5.4.4.4Status | Firmware.......................................................................................................6–19
6.5.4.4.5Status | ACM.............................................................................................................6–20
6.5.4.4.6Status | IP Statistics...................................................................................................6–21
6.5.4.4.7Status | BB Statistics.................................................................................................6–22
6.5.4.5Interfaces page ................................................................................................................6–23
6.5.4.6TxGraph pages (Minutes / Hours / Days).......................................................................6–25
6.5.4.7RxGraph pages (Minutes / Hours / Days).......................................................................6–28
CHAPTER 7.ADAPTIVE CODING AND MODULATION (ACM) OPTION...........................7–1
7.1Introduction.................................................................................................................................7–1
7.2Background .................................................................................................................................7–2
7.2.1Example of ACM Operational Link.................................................................................................... 7–3
7.3ACM System Description...........................................................................................................7–5
7.4CDM-750 ACM Scheme.............................................................................................................7–7
7.4.1Target Es/No Margin............................................................................................................................ 7–7
7.4.2Distortion Adaptation / Modulation Type Impairment...................................................................... 7–8
7.4.3Pilots ...................................................................................................................................................... 7–9
7.4.4Long and Short Frames........................................................................................................................ 7–9
7.4.5Monotonic Operation.......................................................................................................................... 7–10
7.4.6ModCod Selection.............................................................................................................................. 7–11
7.5Configuring ACM in the CDM-750.........................................................................................7–13
7.5.1ACM Configuration via the Front Panel........................................................................................... 7–15
7.6Monitoring ACM Performance and Statistics........................................................................7–15
7.7ACM Congestion Control.........................................................................................................7–16
7.8Notes and Recommendations...................................................................................................7–17
7.9ACM – Summary of Specifications .........................................................................................7–18
CHAPTER 8.DOUBLETALK CARRIER-IN-CARRIEROPTION..........................................8–1
8.1Introduction.................................................................................................................................8–1
8.2What is DoubleTalk Carrier-in-Carrier?.................................................................................8–1
8.3Application Requirements..........................................................................................................8–2
8.3.1Operational Details............................................................................................................................... 8–4
8.4System Functionality and Operational Considerations...........................................................8–5
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8.4.1DoubleTalk Carrier-in-Carrier Cancellation Process......................................................................... 8–8
8.4.2Margin Requirements........................................................................................................................... 8–9
8.4.3Carrier-in-Carrier Latency.................................................................................................................... 8–9
8.4.4Carrier-in-Carrier and Adaptive Coding and Modulation (ACM).................................................... 8–9
8.4.5Carrier-in-Carrier Link Design .......................................................................................................... 8–10
8.4.6Symmetric Data Rate Link................................................................................................................. 8–10
8.4.6.1Asymmetric Data Rate Link ...........................................................................................8–12
8.4.6.2Power Limited Links.......................................................................................................8–13
8.4.7Carrier-in-Carrier Commissioning and Deployment........................................................................ 8–14
8.5Operational References ............................................................................................................8–15
8.5.1Carrier-in-Carrier Link Budget Calculation...................................................................................... 8–15
8.5.2Estimating / Calculating CnC Ratio .................................................................................................. 8–16
8.5.2.1Estimating CnC Ratio from LST / EIRP.........................................................................8–16
8.5.2.2Calculating CnC Ratio from Carrier to Noise Ratio (C/N) on a Spectrum Analyzer.....8–17
8.5.2.3Calculating CnC Ratio and PSD Ratio from Satmaster..................................................8–18
8.6DoubleTalk Carrier-in-Carrier Specifications.......................................................................8–18
8.7Carrier-in-Carrier Summary...................................................................................................8–18
8.8Glossary .....................................................................................................................................8–19
CHAPTER 9.ETHERNET NETWORK CONFIGURATION...................................................9–1
9.1Introduction.................................................................................................................................9–1
9.2Ethernet Routers and Switches..................................................................................................9–1
9.3Ethernet Configuration Examples.............................................................................................9–2
9.3.1Ethernet Network Overview................................................................................................................ 9–2
9.4CDM-750 Ethernet Overview....................................................................................................9–2
9.4.1Ethernet Interfaces................................................................................................................................ 9–2
9.4.2Ethernet Overhead................................................................................................................................ 9–3
CHAPTER 10.FORWARD ERROR CORRECTION..........................................................10–1
10.1Introduction...............................................................................................................................10–1
10.2LDPC and BCH.........................................................................................................................10–1
10.2.1Range of Data Rates........................................................................................................................... 10–2
10.2.2BER, QEF, Eb/No, Es/No Spectral Efficiency, and Occupied Bandwidth.................................... 10–2
CHAPTER 11.G.703 E3/T3/STS-1 PLUG-IN INTERFACE CARD (PIIC) ..........................11–1
11.1Introduction...............................................................................................................................11–1
11.2Physical Description..................................................................................................................11–2
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11.3G.703 E3/T3/STS-1 PIIC Connectors and Pinouts ................................................................11–3
11.4Installing the G.703 E3/T3/STS-1 PIIC...................................................................................11–3
11.5Summary of Specifications.......................................................................................................11–4
11.5.1General Specifications........................................................................................................................ 11–4
11.5.2Interface Specifications ...................................................................................................................... 11–4
APPENDIX A.ES/NO MEASUREMENT.............................................................................. A–1
APPENDIX B.ETHERNET STATISTICS AND STATUS REPORTING............................... B–1
B.1Introduction................................................................................................................................ B–1
B.2Data Flow Diagram.................................................................................................................... B–1
B.3Statistics Items............................................................................................................................ B–3
B.3.1Ethernet Data Statistics.........................................................................................................................B–3
B.3.2Framing and Baseband Statistics.........................................................................................................B–3
B.4Status Items ................................................................................................................................ B–4
B.4.1BER Testing..........................................................................................................................................B–4
B.4.2ACM Modulator Status........................................................................................................................B–4
B.4.3ACM Demodulator Status....................................................................................................................B–4
B.4.4CnC Status.............................................................................................................................................B–4
APPENDIX C.FAST ACTIVATION PROCEDURE.............................................................. C–1
C.1FAST System Overview.............................................................................................................C–1
C.2FAST Activation Procedure......................................................................................................C–2
C.2.1Record Modem Serial Number............................................................................................................C–2
C.2.2View Currently Installed Features.......................................................................................................C–2
C.2.3Order FAST Options............................................................................................................................C–3
C.2.4Enter FAST Access Code ....................................................................................................................C–3
APPENDIX D.REMOTE CONTROL .................................................................................... D–1
D.1Overview.....................................................................................................................................D–1
D.2EIA-232.......................................................................................................................................D–1
D.3EIA-485.......................................................................................................................................D–1
D.4Basic Protocol.............................................................................................................................D–2
D.5Packet Structure.........................................................................................................................D–3
D.5.1Start of Packet ...................................................................................................................................... D–3
D.5.2Target Address..................................................................................................................................... D–3
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D.5.3Address Delimiter................................................................................................................................ D–4
D.5.4Instruction Code................................................................................................................................... D–4
D.5.5Instruction Code Qualifier................................................................................................................... D–4
D.5.6Optional Message Arguments............................................................................................................. D–5
D.5.7End of Packet ....................................................................................................................................... D–5
D.6Remote Commands and Queries..............................................................................................D–6
D.6.1Tx Parameters....................................................................................................................................... D–7
D.6.2Rx Parameters.................................................................................................................................... D–11
D.6.3IP Packet Parameters......................................................................................................................... D–14
D.6.4Unit Parameters.................................................................................................................................. D–16
D.6.5ACM Parameters ............................................................................................................................... D–23
D.6.6G.703 Parameters............................................................................................................................... D–24
D.6.7Bulk Configuration Strings............................................................................................................... D–26
D.6.8Modem Information........................................................................................................................... D–28
D.6.9Modem Performance Information.................................................................................................... D–31
Tables
Table 1-1. FAST and FAST-accessible Hardware Options......................................................................1–9
Table 3-1. CDM-750 Rear Panel Connectors...........................................................................................3–2
Table 5-1. CDM-750 Front Panel Menu Matrix.......................................................................................5–4
Table 5-2. Symbol Rate / Data Rate Range for Standard FECFrame (DVB-S2 Standard FECFrame = 64,800 bits)
........................................................................................................................................................5–16
Table 7-1. ACM Example for Standard FECFrame (64,800 bits)............................................................7–2
Table 7-2. ModCod Comparison: ACM vs. CCM....................................................................................7–3
Table 7-3. Turning Margin into Additional Capacity...............................................................................7–5
Table 7-4. Modulation Type Impairment..................................................................................................7–8
Table 7-5. Spectral Efficiency and Ideal Es/No by ModCod..................................................................7–10
Table 7-6. Data Rate by Option Symbol Rate ........................................................................................7–14
Table 8-1. Spectral Efficiency using DoubleTalk Carrier-in-Carrier .......................................................8–7
Table A-1. CDM-750 Co+No/No to C/N (Es/No) and Eb/No (dB) for DVB-S2 QPSK and 8PSK .......A–3
Table A-2. CDM-750 Co+No/No to C/N (Es/No) and Eb/No (dB) for DVB-S2 16APSK and 32APSK......
.........................................................................................................................................................A–4
Figures
Figure 1-1. CDM-750 Advanced High-Speed Trunking Modem.............................................................1–1
Figure 1-2. CDM-750 Dimensional Envelope..........................................................................................1–5
Figure 1-3. CDM-750 Front Panel View..................................................................................................1–6
Figure 1-4. CDM-750 Rear Panel Views..................................................................................................1–6
Figure 1-5. 70/140 MHz Input Level vs Symbol Rate............................................................................1–12
Figure 1-6. L-Band Input Level vs Symbol Rate....................................................................................1–13
Figure 2-1. Optional Rear-Mounting Support Bracket Kit (KT-0000168) Installation...........................2–3
Figure 2-2. Optional Bearingless Side-Railing Set (FP/SL0006) Installation .........................................2–4
Figure 3-1. CDM-750 Rear Panel Views..................................................................................................3–1
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Figure 4-1. Flash Update via Internet .......................................................................................................4–1
Figure 5-1. CDM-750 Front Panel View..................................................................................................5–1
Figure 5-2. Loopback Test Modes..........................................................................................................5–30
Figure 6-1. CDM-750 Home page............................................................................................................6–7
Figure 6-2. Home | Contact Information page..........................................................................................6–8
Figure 6-3. Home | Customer Support page..............................................................................................6–9
Figure 6-4. Admin | Access page............................................................................................................6–10
Figure 6-5. Admin | SNMP page ............................................................................................................6–12
Figure 6-6. Configuration | Modem page................................................................................................6–13
Figure 6-7. Configuration | Utilities page...............................................................................................6–14
Figure 6-8. Status | Status page...............................................................................................................6–16
Figure 6-9. Status | Logs page.................................................................................................................6–17
Figure 6-10. Status | Info page................................................................................................................6–18
Figure 6-11. Status | Firmware Info page................................................................................................6–19
Figure 6-12. Status | ACM Status page...................................................................................................6–20
Figure 6-13. Status | IP Statistics page....................................................................................................6–21
Figure 6-14. Status | BB Statistics page..................................................................................................6–22
Figure 6-15. Interfaces page....................................................................................................................6–23
Figure 6-16. TxGraph pages (TxHours page shown)..............................................................................6–25
Figure 6-17. RxGraph pages (RxHours page shown).............................................................................6–28
Figure 7-1. Downlink Margin vs. Average Link Availability ..................................................................7–4
Figure 7-2. User Throughput vs. Time and Fades ....................................................................................7–4
Figure 7-3. ACM-over-Satellite – Generic Example................................................................................7–6
Figure 7-4. Single Hop Latency................................................................................................................7–8
Figure 7-5. Spectral Efficiency vs. Ideal Es/No @ QEF ........................................................................7–11
Figure 7-6. Spectral Efficiency vs. Modem Es/No @ QEF (Pruned ModCods) ....................................7–12
Figure 7-7. CDM-750 – ACM Congestion Control................................................................................7–16
Figure 8-1. Conceptual Block Diagram....................................................................................................8–3
Figure 8-2. Conventional FDMA Link.....................................................................................................8–5
Figure 8-3. Same Link Using CDM-750 and DoubleTalkCarrier-in-Carrier...........................................8–6
Figure 8-4. Duplex Link Optimization .....................................................................................................8–6
Figure 8-5. DoubleTalk Carrier-in-Carrier Signals...................................................................................8–8
Figure 8-6. Carrier-in-Carrier Signal Processing Block Diagram.............................................................8–9
Figure 9-1. Networking Loop with Switches............................................................................................9–2
Figure 9-2. CDM-750 Ethernet Architecture Design................................................................................9–3
Figure 9-3. Improper Use of External Switch with CDM-750 .................................................................9–3
Figure 10-1. DVB-S2 QPSK Packet Error Rate versus Es/No...............................................................10–3
Figure 10-2. DVB-S2 8PSK Packet Error Rate versus Es/No................................................................10–4
Figure 10-3. DVB-S2 16APSK Packet Error Rate versus Es/No...........................................................10–5
Figure 10-4. DVB-S2 32APSK Packet Error Rate versus Es/No...........................................................10–6
Figure 11-1. G.703 E3/T3/STS-1 Plug-In Interface Card (PIIC)............................................................11–1
Figure 11-2. G.703 E3/T3/STS-1 PIIC Block Diagram..........................................................................11–2
Figure 11-3. G.703 E3/T3/STS-1 PIIC Rear Panel View.......................................................................11–2
Figure B-1. CDM-750 Data Flow Diagram............................................................................................. B–2
xiii
PREFACE
About this Manual
This manual provides installation and operation information for the Comtech EF Data CDM-750
Advanced High-Speed Trunking Modem. This is a technical document intended for earth station
engineers, technicians, and operators responsible for the operation and maintenance of the
CDM-750.
Reporting Comments or Suggestions Concerning this Manual
Comments and suggestions regarding the content and design of this manual are 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.
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 may be shown when
depicting actual text displayed on the Web or Telnet (i.e., remote control) interface pages for the
unit (e.g., RS-232). All other references in the manual will be shown with the EIA designations.
Trademarks
Product names mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereby acknowledged.
CDM-750 Advanced High-Speed Trunking Modem Revision 1
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IMPORTANT
The user should carefully observe the following information:
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.
Electrical Safety and Compliance
The CDM-750 has been shown to comply with the EN 60950 Safety of Information
Technology Equipment (Including Electrical Business Machines) safety standard.
The equipment is rated for operation over the range 90 to 264 volts AC (DC will be a future
option). It has a maximum power consumption of 100 watts (without BUC supply).
Fuses
CAUTION
FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES WITH
THE CORRECT TYPE AND RATING.
The CDM-750 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 90 to 240 volt AC operation, use (2X) T2.50A 5x20mm slow-blow fuses.
•48 volt DC operation is a future option. Fuse specifications will be provided once this
option is available.
Low Voltage Directive (LVD)
The following information is applicable for the European Low Voltage Directive (2006/95/EC):
Symbol Description
<HAR> Type of power cord required for use in the European
Community.
!
CAUTION: Double-pole/Neutral Fusing
ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung
CDM-750 Advanced High-Speed Trunking Modem Revision 1
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xv
International Symbols
Symbol Definition Symbol Definition
Alternating
Current Protective
Earth
Fuse Chassis
Ground
IMPORTANT
For additional symbols, refer to Cautions and Warnings listed earlier in this
Preface.
Installation
The installation and connection to the line supply must be made in compliance to local or national
wiring codes and regulations.
The CDM-750 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.
The CDM-750 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.
Environmental
The CDM-750 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 (un-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.
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-750 High Speed Trunking Modem meets the necessary
requirements for the CE Mark.
CDM-750 Advanced High-Speed Trunking Modem Revision 1
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xvi
RoHS Compliance
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) Compliance
In accordance with European Directive 2004/108/EEC, the CDM-750 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.)
Immunity: EN 55024 – Information Technology Equipment: Immunity
Characteristics, Limits, and Methods of Measurement.
Additionally, the CDM-750 has been shown to comply with the following standards:
EN 61000-3-2 – Harmonic Currents Emission;
EN 61000-3-3 – Voltage Fluctuations and Flicker.
IMPORTANT
To ensure that the CDM-750 continues to comply with these standards,
observe the following instructions:
•Connections to the Tx and Rx L-Band ports (Type ‘N’ female connectors) should be
made using a good quality coaxial cable.
•All 'D' type connectors attached to the rear panel must have back-shells that provide
continuous metallic shielding. Cable with a continuous outer shield (either foil or braid,
or both) must be used, and the shield must be bonded to the back-shell.
•The equipment must be operated with its cover on at all times. If it becomes necessary to
remove the cover, the user should ensure that the cover is correctly refitted before normal
operation commences.
CDM-750 Advanced High-Speed Trunking Modem Revision 1
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xvii
Warranty Policy
Comtech EF Data products are warranted against defects in material and workmanship
for a specific period from the date of shipment, and this period varies by product. In
most cases, the warranty period is two years. During the warranty period, Comtech EF
Data will, at its option, repair or replace products that prove to be defective. Repairs are
warranted for the remainder of the original warranty or a 90 day extended warranty,
whichever is longer. Contact Comtech EF Data for the warranty period specific to the
product purchased.
For equipment under warranty, the owner is responsible for freight to Comtech EF Data
and all related customs, taxes, tariffs, insurance, etc. Comtech EF Data is responsible for
the freight charges only for return of the equipment from the factory to the owner.
Comtech EF Data will return the equipment by the same method (i.e., Air, Express,
Surface) as the equipment was sent to Comtech EF Data.
All equipment returned for warranty repair must have a valid RMA number issued prior
to return and be marked clearly on the return packaging. Comtech EF Data strongly
recommends all equipment be returned in its original packaging.
Comtech EF Data Corporation’s obligations under this warranty are limited to repair or
replacement of failed parts, and the return shipment to the buyer of the repaired or
replaced parts.
Limitations of Warranty
The warranty does not apply to any part of a product that has been installed, altered,
repaired, or misused in any way that, in the opinion of Comtech EF Data Corporation,
would affect the reliability or detracts from the performance of any part of the product, or
is damaged as the result of use in a way or with equipment that had not been previously
approved by Comtech EF Data Corporation.
The warranty does not apply to any product or parts thereof where the serial number or the
serial number of any of its parts has been altered, defaced, or removed.
The warranty does not cover damage or loss incurred in transportation of the product.
The warranty does not cover replacement or repair necessitated by loss or damage from
any cause beyond the control of Comtech EF Data Corporation, such as lightning or other
natural and weather related events or wartime environments.
The warranty does not cover any labor involved in the removal and or reinstallation of
warranted equipment or parts on site, or any labor required to diagnose the necessity for
repair or replacement.
CDM-750 Advanced High-Speed Trunking Modem Revision 1
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xviii
The warranty excludes any responsibility by Comtech EF Data Corporation for incidental or
consequential damages arising from the use of the equipment or products, or for any inability
to use them either separate from or in combination with any other equipment or products.
A fixed charge established for each product will be imposed for all equipment returned
for warranty repair where Comtech EF Data Corporation cannot identify the cause of the
reported failure.
Exclusive Remedies
Comtech EF Data Corporation’s warranty, as stated is in lieu of all other warranties,
expressed, implied, or statutory, including those of merchantability and fitness for a
particular purpose. The buyer shall pass on to any purchaser, lessee, or other user of
Comtech EF Data Corporation’s products, the aforementioned warranty, and shall
indemnify and hold harmless Comtech EF Data Corporation from any claims or liability
of such purchaser, lessee, or user based upon allegations that the buyer, its agents, or
employees have made additional warranties or representations as to product preference or
use.
The remedies provided herein are the buyer’s sole and exclusive remedies. Comtech EF
Data shall not be liable for any direct, indirect, special, incidental, or consequential
damages, whether based on contract, tort, or any other legal theory.
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