Comtech EF Data SDM-9000 User Manual

SDM-9000

Satellite Modem

Installation and O

Part Number MN/SDM9000.IOM Revision 4

eration Manual

Errata A

Comtech EFData Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

The following changes provide updated information for Section 1.4.3, Table 1-4, Figures 1-6 and 1-7. This information will be incorporated into the next revision.

Change Specifics:

Added 8PSK and 16QAM information

June 6, 2000 SDM-9000 Satellite Modem Installation and Operation Manual Part Number MN/SDM9000.IOM Rev. 4 dated May 5, 1997 MN/SDM9000.EA4 Attach this page to page 1-16

1.4.3 8PSK and 16QAM (Viterbi Decoder and Reed-Solomon Codec)

The 8PSK and 16QAM specifications for the Eb/N0 required to achieve 10-6 to

-9

BER with the Viterbi decoder and Reed-Solomon Codec are shown in Table 1-4. Refer to Figures 1-6 (8PSK) and 1-7 (16QAM) for the BER curves with the Reed-Solomon option.

Table 1-4. 8PSK and 16QAM BER Data

Specification

Without IDR With IDR

8PSK 8PSK 16QAM 16QAM 8PSK 8PSK 16QAM 16QAM

BER 2/3 Rate 5/6 Rate 3/4 Rate 7/8 Rate 2/3 Rate 5/6 Rate ¾ Rate 7/8 Rate

10-6 6.1 dB 8.2 dB 8.3 dB 9.8 dB 6.5 dB 8.6 dB 8.7 dB 10.2 dB 10-7 6.4 dB 8.5 dB 8.5 dB 10.0 dB 6.9 dB 8.9 dB 8.9 dB 10.4 dB 10-8 6.6 dB 8.9 dB 8.7 dB 10.3 dB 7.1 dB 9.3 dB 9.1 dB 10.7 dB 10-9 6.9 dB 9.3 dB 8.9 dB 10.5 dB 7.4 dB 9.7 dB 9.4 dB 10.9 dB

Typical Typical

8PSK 8PSK 16QAM 16QAM 8PSK 8PSK 16QAM 16QAM

BER 2/3 Rate 5/6 Rate 3/4 Rate 7/8 Rate 2/3 Rate 5/6 Rate 3/4 Rate 7/8 Rate

10-6 5.6 dB 7.7 dB 7.8 dB 9.4 dB 5.9 dB 8.1 dB 8.2 dB 9.8 dB 10-7 5.8 dB 7.9 dB 8.1 dB 9.7 dB 6.2 dB 8.3 dB 8.5 dB 10.1 dB 10-8 6.1 dB 8.4 dB 8.3 dB 9.9 dB 6.5 dB 8.9 dB 8.7 dB 10.3 dB 10-9 6.3 dB 8.7 dB 8.6 dB 10.2 dB 6.7 dB 9.1 dB 9.0 dB 10.6 dB

Note: Reed-Solomon parameters differ from open network and closed network. Open network meets IESS-308 QPSK operation, using a 4-deep interleaver. Closed networks run different Reed-Solomon parameters. A longer code word and an 8-deep interleaver is used, resulting in better performance.

-2

-3

-4

-5

BER

-6

-7

-8

-9

-10

3.0 4.0 5.0 6.0

8 Mbit/s, 8PSK w/IDR

2/3 RATE

SPECIFICATIONS

8 Mbit/s, 8PSK w/IDR

5/6 RATE

7.0 8.0 9.0 10.0 11.0

(dB)

b/N0

Figure 1-6. 8PSK BER Performance Curves (with Reed-Solomon)

Filename: T_ERRATA 2

8 Mbit/s, w/ IDR

Figure 1-7. 16QAM BER Performance Curves (with Reed-Solomon)

Filename: T_ERRATA 3

Errata B

Comtech EFData Documentation Update

Subject: Date: Document:

Part Number: Collating Instructions:

Comments:

The following changes provide updated information for page 2-15. This information will be incorporated into the next revision.

Change Specifics:

2.4.10 Alarms (J10)

Changes to Note in Section 2.4.10, Alarms January 19, 2001 SDM-9000 Satellite Data Modem Installation and Operation Manual, Rev. 4, dated May 5, 1997 MN/SDM9000.EB4 Attach this page to page 2-15

The alarms connector is used to provide three Form C contact closures for alarm reporting, as follows:

• Alarm 1 = Not used

• Alarm 2 = TX

• Alarm 3 = RX

The two Form C summary fault contacts currently used are:

• Transmit alarm (Alarm 2)

• Receive alarm (Alarm 3)

Refer to Chapter 4 for a discussion of alarms monitored. To obtain a system summary alarm, connect all the Form C contacts in parallel.

The alarms connection is a 9-pin female D connector located on the rear panel of the modem. Screw locks are provided for mechanical security on the mating connector.

Pin # Signal Function Name

1 NO 2 Alarm 1 COM 3 NC 4 NO 5 Alarm 2 COM 6 NC 7 NO 8 Alarm 3 COM 9 NC

Note: A connection between the common (COM) and normally closed (NC) contacts indicates no alarm.

Filename: T_ERRATA 1

Errata C

Comtech EFData Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

The following changes provide updated information for Table 3-2. This information will be incorporated into the next revision.

Changes to Table 3-2 (Modulator PCB Jumper Settings)

January 23, 2002 SDM-9000 Satellite Modem Installation and Operation Manual, Rev. 4, dated May 5, 1997 MN/SDM9000.EC4 Attach this page to page 3-3

Change Specifics:

3.2 Modulator

The modulator PCB (AS/3969) is located in the top slot of the modem chassis. The jumper settings are listed in Table 3-2. Figure 3-2 shows the modulator card and the jumper locations.

Table 3-2. Modulator PCB Jumper Settings

Jumper Position Function

J7 1 to 2

2 to 3 J9 (EEPROM size select)

Note: The modulator PCB jumpers in Table 3-2 are factory set.

1 to 2

2 to 3

Output forced ON, test mode Normal, processor control 27C512 (64K EEPROM) 27C256 (32K EEPROM)

Filename: T_ERRATA 1

Comtech EFData is an ISO 9001

Registered Company.

SDM-9000

Satellite Modem

Installation and Operation Manual

Part Number MN/SDM9000.IOM

Revision 4

May 5, 1997

Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161.

Customer Support

Contact the Comtech EFData Customer Support Department for:

•

Product support or training

•

Information on upgrading or returning a product

•

Reporting comments or suggestions concerning manuals

A Customer Support representative may be reached at:

Comtech EFData Attention: Customer Support Department 2114 West 7th Street Tempe, Arizona 85281 USA

(480) 333-2200 (Main Comtech EFData Number) (480) 333-4357 (Customer Support Desk) (480) 333-2161 FAX

or, E-Mail can be sent to the Customer Support Department at:

service@comtechefdata.com

1. To return a Comtech EFData product (in-warranty and out-of-warranty) for repair or replacement:

2. Request a Return Material Authorization (RMA) number from the Comtech EFData Customer Support Department.

3. Be prepared to supply the Customer Support representative with the model number, serial number, and a description of the problem.

4. To ensure that the product is not damaged during shipping, pack the product in its original shipping carton/packaging.

5. Ship the product back to Comtech EFData. (Shipping charges should be prepaid.)

For more information regarding the warranty policies, see Warranty Policy, p. xiv.

ii Rev. 4

CHAPTER 1. INTRODUCTION........................................................................................1–1

1.1 Overview................................................................................................................................................................. 1–2

1.1.1 Nyquist Filter Printed Circuit Boards............................................................................................................... 1–3

1.1.2 Description........................................................................................................................................................ 1–4

1.1.3 Options ................................................................................................................. ............................................1–6

1.1.3.1 Reed-Solomon Codec................................................................................................................................ 1–6

1.1.3.2 8PSK/16QAM........................................................................................................................................... 1–6

1.1.3.3 Direct Broadcast Satellite.......................................................................................................................... 1–7

1.2 Modem Assemblies................................................................................................................................................. 1–8

1.3 Modem Specifications............................................................................................................................................ 1–10

1.4 BER Performance Specifications.......................................................................................................................... 1–12

1.4.1 Viterbi Decoder BER (QPSK).......................................................................................................................... 1–12

1.4.2 Reed-Solomon Codec BER (QPSK)................................................................................................................. 1–14

1.4.3 8PSK and 16QAM (Viterbi Decoder and Reed-Solomon Codec).................................................................... 1–16

CHAPTER 2. INSTALLATION.........................................................................................2–1

2.1 Unpacking............................................................................................................................................................... 2–1

2.2 System Options....................................................................................................................................................... 2–2

2.3 System Installation................................................................................................................................................. 2–3

2.4 External Connectors.............................................................................................................................................. 2–5

2.4.1 TX/IF Output (CP1).......................................................................................................................................... 2–6

2.4.2 RX/IF Input (CP2)............................................................................................................................................ 2–6

2.4.3 Receive Data (CP3).......................................................................................................................................... 2–6

2.4.4 Send Data (CP4)............................................................................................................................................... 2–6

2.4.5 External Clock (CP5)........................................................................................................................................ 2–6

2.4.6 Remote (J6) ...................................................................................................................................................... 2–7

2.4.7 Fault (J7)........................................................................................................................................................... 2–8

2.4.8 DATA I/O (ESC) Interface (J8)........................................................................................................................ 2–9

2.4.8.1 G.703 (IDR) Interface (J8) (Audio Mode) ................................................................................................ 2–10

Rev. 4 iii

Preface SDM-9000 Satelite Modem

2.4.8.2 G.703 (IDR) Interface (J8) (64 kbit/s Mode) ............................................................................................ 2–11

2.4.8.3 ECL Interface (J8)..................................................................................................................................... 2–12

2.4.8.4 MIL-STD-188 Interface (J8)..................................................................................................................... 2–13

2.4.9 AUX 1 (J9)....................................................................................................................................................... 2–14

2.4.10 Alarms (J10)................................................................................................................................................... 2–15

2.4.11 AC Power ....................................................................................................................................................... 2–16

2.4.12 DC Power ....................................................................................................................................................... 2–16

2.4.13 Ground (GND)................................................................................................................................................ 2–16

CHAPTER 3. CONFIGURATION.....................................................................................3–1

3.1 Display/M&C.......................................................................................................................................................... 3–1

3.2 Modulator............................................................................................................................................................... 3–3

3.3 Demodulator........................................................................................................................................................... 3–4

3.4 Interface.................................................................................................................................................................. 3–5

3.5 Nyquist Filter Configuration................................................................................................................................. 3–9

3.5.1 Compatibility.................................................................................................................................................... 3–10

3.5.2 Installation........................................................................................................................................................ 3–10

3.5.2.1 Unpacking Instructions.............................................................................................................................. 3–10

3.5.2.2 Tools Required.......................................................................................................................................... 3–11

3.5.2.3 Installation Procedure................................................................................................................................ 3–11

3.5.2.3.1 Nyquist Filter Removal...................................................................................................................... 3–11

3.5.2.3.2 Nyquist Filter Replacement................................................................................................................ 3–13

3.6 Software Configuration......................................................................................................................................... 3–14

3.6.1 Revision Emulation .......................................................................................................................................... 3–14

3.6.2 Remote Interface Specification......................................................................................................................... 3–15

3.6.2.1 Remote Baud Rate..................................................................................................................................... 3–15

3.6.2.2 Remote Address........................................................................................................................................ 3–15

3.6.3 Modem Defaults............................................................................................................................................... 3–16

CHAPTER 4. OPERATION..............................................................................................4–1

4.1 Front Panel............................................................................................................................................................. 4–1

4.1.1 LED Indicators ................................................................................................................................................. 4–2

4.1.2 Front Panel Controls......................................................................................................................................... 4–3

4.2 Menu System .......................................................................................................................................................... 4–4

4.2.1 Configuration.................................................................................................................................................... 4–5

4.2.1.1 Configuration Modulator........................................................................................................................... 4–7

4.2.1.2 Configuration Demodulator.......................................................................................................................4–11

4.2.1.3 Configuration Interface............................................................................................................................. 4–15

4.2.1.4 Configuration Save.................................................................................................................................... 4–20

4.2.1.5 Configuration Recall................................................................................................................................. 4–21

4.2.2 Monitor............................................................................................................................................................. 4–23

4.2.3 Faults/Alarms.................................................................................................................................................... 4–25

4.2.3.1 Modulator Faults....................................................................................................................................... 4–26

4.2.3.2 Demodulator Faults................................................................................................................................... 4–27

4.2.3.3 TX Interface Faults.................................................................................................................................... 4–28

iv Rev. 4

SDM-9000 Satelite Modem Preface

4.2.3.4 RX Interface Faults ................................................................................................................................... 4–29

4.2.3.5 Common Equipment Faults....................................................................................................................... 4–30

4.2.3.6 Backward Alarms...................................................................................................................................... 4–30

4.2.4 Stored Faults/Alarms........................................................................................................................................ 4–33

4.2.5 Utility................................................................................................................................................................ 4–35

4.2.5.1 Utility Modulator....................................................................................................................................... 4–37

4.2.5.2 Utility Demodulator .................................................................................................................................. 4–39

4.2.5.3 Utility Interface......................................................................................................................................... 4–42

4.2.5.4 Utility System............................................................................................................................................ 4–45

4.2.5.5 Utility Modem Type.................................................................................................................................. 4–49

4.2.5.6 Utility Factory Setup................................................................................................................................. 4–50

4.3 Clocking Options.................................................................................................................................................... 4–53

4.3.1 G.703 Interface Clocking..................................................................................................................................4–53

4.3.1.1 TX Timing................................................................................................................................................. 4–53

4.3.1.2 RX Timing................................................................................................................................................. 4–53

4.3.1.2.1 RX Timing (with Buffer)................................................................................................................... 4–53

4.3.1.2.2 RX Timing (without Buffer).............................................................................................................. 4–53

4.3.2 ECL/MIL-STD-188 Interface Clocking ........................................................................................................... 4–54

4.3.2.1 TX Timing................................................................................................................................................ 4–54

4.3.2.2 RX Timing................................................................................................................................................. 4–54

4.3.2.2.1 RX Timing (with Buffer)................................................................................................................... 4–54

4.3.2.2.2 RX Timing (without Buffer).............................................................................................................. 4–54

CHAPTER 5. THEORY OF OPERATION........................................................................5–1

5.1 Display/M&C.......................................................................................................................................................... 5–1

5.1.1 Description........................................................................................................................................................ 5–1

5.1.2 Theory of Operation ......................................................................................................................................... 5–2

5.2 Modulator............................................................................................................................................................... 5–4

5.2.1 Description........................................................................................................................................................ 5–4

5.2.2 Specifications.................................................................................................................................................... 5–6

5.2.3 Theory of Operation ......................................................................................................................................... 5–7

5.2.4 Theory of Modulation Types............................................................................................................................ 5–9

5.2.4.1 Description................................................................................................................................................ 5–9

5.2.4.2 QPSK Encoding/Modulation..................................................................................................................... 5–9

5.2.4.3 8PSK Encoding/Modulation...................................................................................................................... 5–10

5.2.4.4 16QAM Encoding/Modulation.................................................................................................................. 5–10

5.3 Demodulator........................................................................................................................................................... 5–11

5.3.1 Description........................................................................................................................................................ 5–11

5.3.2 Specifications.................................................................................................................................................... 5–11

5.3.3 Theory of Operation ......................................................................................................................................... 5–13

5.4 Viterbi Decoder...................................................................................................................................................... 5–16

5.4.1 Description........................................................................................................................................................ 5–16

5.4.2 Specifications.................................................................................................................................................... 5–16

5.4.3 Theory of Operation ......................................................................................................................................... 5–17

5.5 Interface.................................................................................................................................................................. 5–18

5.5.1 Description........................................................................................................................................................ 5–18

5.5.2 Digital Interface Specifications ........................................................................................................................ 5–19

5.5.2.1 G.703 ......................................................................................................................................................... 5–20

Rev. 4 v

Preface SDM-9000 Satelite Modem

5.5.2.2 ECL........................................................................................................................................................... 5–20

5.5.2.3 MIL-STD-188........................................................................................................................................... 5–20

5.5.3 Theory of Operation ......................................................................................................................................... 5–21

5.5.3.1 Transmit Data Path.................................................................................................................................... 5–23

5.5.3.2 Receive Data Path ..................................................................................................................................... 5–24

5.5.3.3 Loopbacks................................................................................................................................................. 5–26

5.5.3.3.1 Baseband Loopback........................................................................................................................... 5–26

5.5.3.3.2 Interface Loopback............................................................................................................................ 5–27

5.5.3.4 Engineering Service Channel (ESC)......................................................................................................... 5–27

5.6 Backward Alarm Theory and Connections......................................................................................................... 5–28

CHAPTER 6. MAINTENANCE.........................................................................................6–1

6.1 System Checkout.................................................................................................................................................... 6–1

6.1.1 Interface............................................................................................................................................................ 6–1

6.1.2 Modulator ......................................................................................................................................................... 6–3

6.1.3 Demodulator..................................................................................................................................................... 6–8

6.1.4 Test Points ........................................................................................................................................................ 6–10

6.1.4.1 Interface PCB............................................................................................................................................ 6–10

6.1.4.2 Modulator PCB ......................................................................................................................................... 6–11

6.1.4.3 Demodulator PCB..................................................................................................................................... 6–12

6.2 Fault Isolation......................................................................................................................................................... 6–13

6.2.1 Guidelines......................................................................................................................................................... 6–13

6.2.2 System Faults/Alarms....................................................................................................................................... 6–14

6.2.2.1 Fault/Alarm Display and Description........................................................................................................ 6–18

6.2.2.2 Fault/Alarm Analysis ................................................................................................................................ 6–19

6.2.2.2.1 Modulator Faults................................................................................................................................ 6–19

6.2.2.2.2 Demodulator Faults............................................................................................................................ 6–20

6.2.2.2.3 TX Interface Faults ............................................................................................................................ 6–22

6.2.2.2.4 RX Interface Faults............................................................................................................................ 6–23

6.2.2.2.5 Common Equipment Faults................................................................................................................6–25

6.2.2.2.6 Backward Alarms............................................................................................................................... 6–26

6.3 Module Replacement ............................................................................................................................................. 6–27

6.4 Module Identification ............................................................................................................................................ 6–27

6.5 Repacking for Shipment........................................................................................................................................ 6–27

APPENDIX A. OPTIONS ..................................................................................................A–1

A.1 Reed-Solomon Codec............................................................................................................................................ A–1

A.1.1 Specifications................................................................................................................................................... A–2

A.1.2 Theory of Operation......................................................................................................................................... A–2

A.1.2.1 Reed-Solomon Encoder............................................................................................................................ A–2

A.1.2.2 Reed-Solomon Decoder............................................................................................................................ A–5

A.1.3 Installation....................................................................................................................................................... A–7

A.1.3.1 Unpacking Instructions............................................................................................................................. A–7

A.1.3.2 Tools Required......................................................................................................................................... A–7

A.1.3.3 Installation Procedure............................................................................................................................... A–8

A.2 Direct Broadcast Satellite..................................................................................................................................... A–10

vi Rev. 4

SDM-9000 Satelite Modem Preface

A.2.1 Requirements................................................................................................................................................... A–11

A.2.2 Baseband Physical Interfaces........................................................................................................................... A–12

A.2.2.1 ECL Physical Interface............................................................................................................................. A–12

A.2.2.2 PECL Physical Interface........................................................................................................................... A–13

A.2.3 DBS Baseband Interface.................................................................................................................................. A–14

A.2.3.1 DBS TX Baseband Interface.................................................................................................................... A–14

A.2.3.2 DBS RX Baseband Interface.................................................................................................................... A–14

A.2.4 Baseband Interface Requirements.................................................................................................................... A–15

A.2.4.1 Timing for Transmit Baseband Interface.................................................................................................. A–15

A.2.4.1.1 DBS Mode TX SYNC Pulse Timing................................................................................................ A–16

A.2.4.2 Timing for Receive Baseband Interface ................................................................................................... A–16

A.2.4.2.1 DBS Mode Receive SYNC Pulse Timing.................................................................................. ....... A–17

A.2.5 SYNC Decoder (Correlater) ............................................................................................................................ A–18

A.2.5.1 DBS Mode SYNC Decoder for 204-Byte Packets ................................................................................... A–18

A.2.5.1.1 TX Functions of the DBS Mode SYNC Decoder............................................................................. A–18

A.2.5.1.2 RX Functions of the DBS Mode SYNC Decoder............................................................................. A–18

A.2.6 SYNC 1 Inversion and Scrambler/Descrambler.............................................................................................. A–19

A.2.6.1 DBS Mode (De)Scrambler for 204-Byte Packets..................................................................................... A–20

A.2.7 Reed-Solomon Coder/Decoder........................................................................................................................ A–21

A.2.7.1 DBS Mode Check Byte Framing for 204-Byte Packets........................................................................... A–22

A.2.8 Depth 12 Interleaver/De-interleaver................................................................................................................ A–23

A.2.9 Inner Coder/Decoder........................................................................................................................................ A–25

A.2.9.1 Punctured Operation................................................................................................................................. A–25

A.2.9.2 Signal Space Mapping .............................................................................................................................. A–27

A.2.10 Nyquist Filters................................................................................................................................................ A–28

A.2.11 DVB with Reed-Solomon BER (QPSK) ....................................................................................................... A–29

A.3 ESC 64 kbit/s Data Option................................................................................................................................... A–31

APPENDIX B. REMOTE CONTROL OPERATION ..........................................................B–1

B.1 General................................................................................................................................................................... B–1

B.2 Message Structure................................................................................................................................................. B–2

B.2.1 Start Character ................................................................................................................................................. B–2

B.2.2 Device Address................................................................................................................................................ B–2

B.2.3 Command/Responses....................................................................................................................................... B–3

B.2.4 End Character................................................................................................................................................... B–3

B.3 Configuration Commands/Responses.................................................................................................................. B–4

B.3.1 Modulator......................................................................................................................................................... B–4

B.3.2 Demodulator .................................................................................................................................................... B–5

B.3.3 Interface........................................................................................................................................................... B–6

B.3.4 System.............................................................................................................................................................. B–9

B.4 Status Commands/Responses............................................................................................................................... B–10

B.4.1 Configuration................................................................................................................................................... B–10

B.4.2 Error Performance............................................................................................................................................ B–15

B.5 Stored Faults.......................................................................................................................................................... B–19

GLOSSARY ......................................................................................................................g-1

Rev. 4 vii

Preface SDM-9000 Satelite Modem

Figures

Figure 1-1. SDM-9000 .............................................................................................................................................. 1–1

Figure 1-2. Modular Construction............................................................................................................................. 1–4

Figure 1-3. SDM-9000 Block Diagram..................................................................................................................... 1–5

Figure 1-4. Viterbi BER Performance Curves (QPSK)............................................................................................. 1–13

Figure 1-5. Reed-Solomon BER Performance Curves (QPSK)................................................................................. 1–15

Figure 1-6. 8PSK BER Performance Curves (with Reed-Solomon) ......................................................................... 1–17

Figure 1-7. 16QAM BER Performance Curves (with Reed-Solomon) ..................................................................... 1–18

Figure 1-8. SDM-9000 Typical Spectral Occupancy................................................................................................. 1–19

Figure 2-1. SDM-9000 Dimensional Drawing .......................................................................................................... 2–4

Figure 2-2. SDM-9000 Rear Panel View................................................................................................................... 2–5

Figure 3-1. Display/M&C PCB................................................................................................................................. 3–2

Figure 3-2. Modulator PCB (AS/3969) ..................................................................................................................... 3–3

Figure 3-3. Demodulator PCB (AS/3970)................................................................................................................. 3–4

Figure 3-4. Interface PCB (AS/3971)........................................................................................................................ 3–6

Figure 3-5. Interface PCB (AS/4477)........................................................................................................................ 3–7

Figure 3-6. Interface PCB (AS/5618)........................................................................................................................ 3–8

Figure 3-7. Nyquist Filter Installation....................................................................................................................... 3–12

Figure 4-1. SDM-9000 Front Panel View.................................................................................................................. 4–1

Figure 4-2. Main Menu.............................................................................................................................................. 4–4

Figure 4-3. Configuration Modulator Menu.............................................................................................................. 4–6

Figure 4-4. Configuration Demodulator Menu.......................................................................................................... 4–10

Figure 4-5. Configuration Interface Menu................................................................................................................. 4–14

Figure 4-6. Configuration Save Menu....................................................................................................................... 4–20

Figure 4-7. Configuration Recall Menu..................................................................................................................... 4–21

Figure 4-8. Monitor Menu......................................................................................................................................... 4–22

Figure 4-9. Faults/Alarm Menu................................................................................................................................. 4–24

Figure 4-10. Stored Faults/Alarms Menu.................................................................................................................. 4–32

Figure 4-11. Utility Modulator Menu........................................................................................................................ 4–36

Figure 4-12. Utility Demodulator Menu.................................................................................................................... 4–38

Figure 4-13. Utility Interface Menu........................................................................................................................... 4–40

Figure 4-13. Utility Interface Menu Continued......................................................................................................... 4–41

Figure 4-14. Utility System Menu............................................................................................................................. 4–44

Figure 4-15. Utility Modem Type Menu................................................................................................................... 4–48

Figure 4-16. Utility Factory Setup Menu................................................................................................................... 4–50

Figure 4-17. RF Loopback......................................................................................................................................... 4–51

Figure 4-18. IF Loopback.......................................................................................................................................... 4–51

Figure 4-19. Baseband Loopback.............................................................................................................................. 4–52

Figure 4-20. Interface Loopback............................................................................................................................... 4–52

Figure 4-21. G.703 Interface Clocking Diagram....................................................................................................... 4–55

Figure 4-22. ECL/MIL-STD-188 Interface Clocking Diagram................................................................................. 4–55

Figure 5-1. Display/M&C Block Diagram................................................................................................................ 5–2

Figure 5-2. Modulator Baseband Section Block Diagram......................................................................................... 5–4

Figure 5-3. Modulator RF Section Block Diagram.................................................................................................... 5–5

Figure 5-4. Demodulator Block Diagram.................................................................................................................. 5–12

Figure 5-5. Viterbi Decoder Block Diagram............................................................................................................. 5–16

Figure 5-6. Interface Block Diagram......................................................................................................................... 5–22

Figure 5-7. Baseband Loopback Block Diagram....................................................................................................... 5–26

Figure 5-8. Interface Loopback Block Diagram........................................................................................................ 5–27

Figure 6-1. Fault Isolation Test Setup ....................................................................................................................... 6–2

Figure 6-2. Typical Output Spectrum (with Noise)................................................................................................... 6–4

Figure 6-3. Typical Output Spectrum (without Noise).............................................................................................. 6–4

viii Rev. 4

SDM-9000 Satelite Modem Preface

Figure 6-4. Typical Eye Constellations..................................................................................................................... 6–9

Figure 6-5. Interface PCB Test Points....................................................................................................................... 6–10

Figure 6-6. Modulator PCB Test Points.................................................................................................................... 6–11

Figure 6-7. Demodulator PCB Test Points................................................................................................................ 6–12

Figure A-1. Reed-Solomon Codec Block Diagram................................................................................................... A–1

Figure A-2. Reed-Solomon Encoder Section Block Diagram................................................................................... A–2

Figure A-3. Reed-Solomon Codec Frame Format..................................................................................................... A–4

Figure A-4. Reed-Solomon Decoder Section Block Diagram................................................................................... A–5

Figure A-5. Reed-Solomon Installation..................................................................................................................... A–9

Figure A-6. Block Diagram of SDM-9000 Configured for DBS/DVB Operation.................................................... A–11

Figure A-7. Typical Differential ECL Receiver and Driver...................................................................................... A–12

Figure A-8. Typical Differential PECL Receiver and Driver.................................................................................... A–13

Figure A-9. DBS Mode Baseband Packet ................................................................................................................. A–14

Figure A-10. Timing for Transmit Baseband Interface ............................................................................................. A–15

Figure A-11. DBS Mode TX SYNC Pulse Timing................................................................................................... A–16

Figure A-12. Timing for Receive Baseband Interface............................................................................................... A–16

Figure A-13. DBS Mode Receive SYNC Pulse Timing............................................................................................ A–17

Figure A-14. DBS Mode Receive with Extended SYNC.......................................................................................... A–17

Figure A-15. Scrambler/Descrambler........................................................................................................................ A–19

Figure A-16. DBS Scrambler Sequence.................................................................................................................... A–20

Figure A-17. Reed-Solomon RS(204,188,8) Error-Protected Packet........................................................................ A–21

Figure A-18. Interleaver/De-interleaver.................................................................................................................... A–23

Figure A-19. Interleaved Frame Structure................................................................................................................. A–24

Figure A-20. DVB Puncturing................................................................................................................................... A–25

Figure A-21. QPSK Constellation............................................................................................................................. A–27

Figure A-22. QPSK (1/2, 3/4, 7/8 Rates) with Reed-Solomon (DVB)...................................................................... A–30

Tables

Table 1-1. SDM-9000 Specifications............................................................................................................................. 1–10

Table 1-2. Viterbi Decoder BER Data........................................................................................................................... 1–12

Table 1-3. Reed-Solomon BER Data............................................................................................................................. 1–14

Table 1-4. 8PSK and 16QAM BER Data....................................................................................................................... 1–16

Table 2-1. Modem Rear Panel Connectors.................................................................................................................... 2–5

Table 3-1. Display/M&C PCB Jumper Settings............................................................................................................ 3–2

Table 3-2. Modulator PCB Jumper Settings.................................................................................................................. 3–3

Table 3-3. Demodulator PCB Jumper Settings.............................................................................................................. 3–4

Table 3-4. Interface Configuration Jumper Settings...................................................................................................... 3–5

Table 3-5. SDM-9000 Revision Emulation.................................................................................................................... 3–14

Table 3-6. Modem Defaults........................................................................................................................................... 3–16

Table 6-1. Conversion to S/N and Eb/N0 Chart (QPSK)............................................................................................... 6–5

Table 6-2. Conversion to S/N and Eb/N0 Chart (8PSK)................................................................................................ 6–6

Table 6-3. Conversion to S/N and Eb/N0 Chart (16QAM)............................................................................................ 6–7

Table 6-4. SDM-9000 Modem Fault Tree ..................................................................................................................... 6–15

Table A-1. Electrical Characteristics of ECL and PECL Interface Types ..................................................................... A–13

Table A-2. TX Baseband Interface Timing.................................................................................................................... A–15

Table A-3. Receive Baseband Interface Timing............................................................................................................ A–17

Table A-4. Rate Exchange Ratios for DVB Puncturing................................................................................................. A–26

Table A-5. Reed-Solomon BER Data.............................................................................................. .............................. A–29

Rev. 4 ix

Preface SDM-9000 Satelite Modem

Overview of Changes to Previous Edition

Changes made to Rev. 3 include:

•

Added metric conversion paragraph to Preface.

•

Incorporated comment column to table on Page 1-3.

•

Revised table reflecting SDM-9000 part numbers.

•

Relocated reference to Figure 1-8 to Page 1-21.

•

Rearranged Chapter 2 paragraphing as follows:

•

Changed 2.5 to 2.2

•

Changed 2.2 to 2.3

•

Changed 2.4 to 2.5

•

Added second step to Note on Page 2-3.

•

Rearranged Table 2-1 to reflect a alpha/numeric sequence.

•

Rearranged paragraphing to agree with Table 2-1.

•

Deleted the notes following 2.4.8.1, 2.4.8.1.1, 2.4.8.2, and 2.4.8.3.

•

Chapter 2.4.8 note references are to the notes listed in 2.4.8.

•

Incorporated tool reference in 3.5.2.3.1, step (1)

•

Incorporated tool reference in 3.5.2.3.2, step (1).

•

Revised section 3.6.1 to reflect history of software versions.

•

Revised table in 4.2.1.1 to agree with Figure 4-3.

•

Revised Figure 4-4 to reflect to reflect Test Mode Configuration conditions.

•

Revised table 4.2.1.2 to agree with Figure 4-4.

•

Revised table 4.2.1.3 to agree with Figure 4-5.

•

Deleted 4.2.4.1.

•

Added Reed Solomon to table specified in 5.5.1.

•

Added section A.3 ESC 64 kbit/s Data Option to Appendix A.

•

Added metric conversion table to inside of back cover.

x Rev. 4

SDM-9000 Satelite Modem Preface

About this Manual

This manual provides installation and oper at ion info rm ation for the EFData SDM- 9000 satellite modem. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the SDM-9000.

Conventions and References

Cautions and Warnings

CAUTION indicates a hazardous situation that, if not avoided, may result in minor or moderate injury. CAUTION may also be used to indicate other

CAUTION

unsafe practices or risks of property damage.

WARNING indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.

WARNING

Rev. 4 xi

Preface SDM-9000 Satelite Modem

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 English 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 are shown only when depicting actual text displayed on the screen of the unit (RS-232, RS485, etc.). All other references in the manual will be shown with the EIA designations (EIA-232, EIA-485, etc.) only.

Military Standards

References to “MIL-STD-188” apply to the 114A series (i.e., MIL-STD-188-114A), which provides electrical and functional characteristics of the unbalanced and balanced voltage digital interface circuits applicable to both long haul and tactical communications. Specifically, these references apply to the MIL-STD-188-114A electrical characteristics for a balanced voltage digital interface circuit, Type 1 generator, for the full range of data rates. For more information, refer to the Department of Defense (DOD) MIL-STD-188-114A, “

Electrical Characteristics of Digital Interface Circuits

.”

Trademarks

Product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged.

xii Rev. 4

SDM-9000 Satelite Modem Preface

European EMC Directive

In order to meet the European Electro-Magnetic Compatibility (EMC) Directive (EN55022, EN50082-1), properly shielded cables for DATA I/O are required. More specifically, these cables must be double-shielded from end-to-end, ensuring a continuous ground shield.

The following information is applicable for the European Low Voltage Directive (EN60950):

<HAR> Type of power cord required for use in the European Community.

CAUTION: Double-pole/Neutral Fusing

International Symbols:

ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung

Alternating Current.

Fuse. Safety Ground.

Chassis Ground.

Note:

For additional symbols, refer to “Cautions and Warnings” listed earlier in this

preface.

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 EFData Customer Support Department.

Rev. 4 xiii

Preface SDM-9000 Satelite Modem

Warranty Policy

This Comtech EFData product is warranted against defects in material and workmanship for a period of one year from the date of shipment. During the warranty period, Comtech EFData will, at its option, repair or replace products that prove to be defective.

For equipment under warranty, the customer is responsible for freight to Comtech EFData and all related custom, taxes, tariffs, insurance, etc. Comtech EFData is responsible for the freight charges the customer. Comtech EFData will return the equipment by the same method (i.e., Air, Express, Surface) as the equipment was sent to Comtech EFData.

only

for return of the equipment from the factory to

Limitations of Warranty

The foregoing warranty shall not apply to defects resulting from improper installation or maintenance, abuse, unauthorized modification, or operation outside of environmental specifications for the product, or, for damages that occur due to improper repack ag ing of equipment for return to Comtech EFData.

No other warranty is expressed or implied. Comtech EFData specifically disclaims the implied warranties of merchantability and fitness for particular purpose.

Exclusive Remedies

The remedies provided herein are the buyer's sole and exclusive remedies. Comtech EFData shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort, or any other legal theory.

Disclaimer

Comtech EFData has reviewed this manual thoroughly in order that it will be an easy-touse guide to your equipment. All statements, technical information, and recommendations in this manual and in any guides or related documents are believed reliable, but the accuracy and completeness thereof are not guaranteed or warranted, and they are not intended to be, nor should they be understood to be, representations or warranties concerning the products described. Further, Comtech EFData reserves the right to make changes in the specifications of the products described in this manual at any time without notice and without obligation to notify any person of such changes.

If you have any questions regarding your equipment or the information in this manual, please contact the Comtech EFData Customer Support Department.

xiv Rev. 4

Chapter 1.

INTRODUCTION

This chapter describes the options and provides an overview, description, and specifications for the SDM-9000 satellite modem, referred to in this manual as “the modem” (Figure 1-1).

Figure 1-1. SDM-9000

Rev.4 1–1

Introduction SDM-9000 Satellite Modem

1.1 Overview

The modem is a high performance, full-duplex, digital-vector modulator/demodulator that meets the open network requirements of the IESS-308 specifications for Intermediate Data Rate (IDR). The modem can also be used for any closed network and satellite communication system applications. Refer to Section 1.1.3 for additional applications data.

Module types that are compatible with each application are as follows:

Configuration Interface Type FEC Option Options

70/140 MHz Duplex (AC) MIL188/144 with Buffer QPSK 70/140 MHz TX (AC) MIL188/144 with ESC 8PSSK/16QAM

70/140 MHz RX (AC) MIL188/144 with Buffer /RS Digital Video Broadcast 70/140 MHz Duplex (DC ) MIL188/144 with ESC/RS

70/140 MHz TX (DC ) ECL w ith Buffer 70/140 MHz RX (DC) ECL with ESC

ECL with Buffer/RS PECL with Buffer PECL with ESC PECL with Buffer/RS PECL with ESC/RS G.703 with Buffer G.703 with ESC G.703 Buffer/RS G.703 with ESC/RS G.703 with ESC/64 kbit/s G.703 with ESC/64 kbit/s /RS

50Ω H/S 10

(DVB) H/S 10

-7

with DVB

Notes:

1. 75Ω, QPSK, and +5 dBm output are standard with the SDM-9000.

2. The standard Reed-Solomon is in accordance with IESS-308 (IDR).

The modem operates with IF converter equipment operating within a 50 to 180 MHz band. An internal channel unit, conforming to the IESS-308 specification, provides overhead designated for Engineering Service Circuits (ESC).

The modem contains:

• Built-in scramblers/descramblers

• Differential encoder/decoder

• Transmit and receive frequency synthesizers

• Multi–rate Forward Error Correction (FEC) convolutional encoder and Viterbi

decoder

1–2 Rev. 4

SDM-9000 Satellite Modem Introduction

The modem provides high performance with:

• Narrow occupied bandwidth

• Automatic signal acquisition

• High flexibility

• Extensive online monitoring circuits

The modem interfaces between Single Channel Per Carrier (SCPC) fixed-rate terminal equipment that operates within the following specifications:

• Data rate of 6.0 to 51.84 Mbit/s

• Symbol rate of 1.7 to 37.5 Ms/s

• Configured to add overhead and framing to the data

The 51.84 Mbit/s data rate is defined by STS-1 (Sonnet specifications).

1.1.1 Nyquist Filter Printed Circuit Boards

The modem features include a Nyquist filter Printed Circuit Board (PCB) for enabling the user to change data rates at the modulator or demodulator. The modem supports up to four channels at the following data rate and modulation type combinations:

Data Rates 6.0 to 51.84 Mbit/s Comments

Modulation Types QPSK 1/2 Rate

QPSK 3/4 Rate QPSK 7/8 Rate 8PSK 2/3 Rate 8PSK 5/6 Rate 16QAM 3/4 Rate 16QAM 7/8 Rate

Optional Optional Optional Optional

Data rate information is automatically recovered from the filter module upon system power-up or initialization. The installed interface, modulator, and demodulator must be compatible with the installed filters for proper modem operation. The filters can be installed in the factory or field.

Refer to Chapter 3 for information about modem configuration.

Rev. 4 1–3

Introduction SDM-9000 Satellite Modem

1.1.2 Description

The modem is a complete, self-contained unit in a standard 2 unit (2U) 19” rack-mountable enclosure weighing approximately 19 lbs. The unit is of modular construction consisting of five PCB assemblies:

• Modulator

• Demodulator

• Interface

• Display/Monitor & Control (M&C) (front panel)

• Backplane (rear panel)

The backplane PCB is mounted on the chassis assembly and contains receptacles for three plug-in PCBs:

• Modulator

• Demodulator

• Interface

Test points are located on the front edges of the three PCBs. Figure 1-2 shows the front view of the modem (without the front panel).

All M&C functions and indicators for operation of the modem are located on the display/M&C. The chassis also contains a fan (on the rear panel) and a power supply. Refer to Figure 1-3 for a system block diagram.

Figure 1-2. Modular Construction

1–4 Rev. 4

SDM-9000 Satellite Modem Introduction

Figure 1-3. SDM-9000 Block Diagram

Rev. 4 1–5

Introduction SDM-9000 Satellite Modem

1.1.3 Options

1.1.3.1 Reed-Solomon Codec

The Reed-Solomon Codec works in conjunction with the Viterbi decoder, and includes additional framing, interleaving, and Codec.

This option can be factory or user installed. Refer to the following table for modem compatibility requirements.

Interface PCB Type 2 or 3 (or greater)

AS/3971-2

AS/3971-3 Display/M&C PCB AS/2305 Rev. C4 (or greater) Modulator PCB AS/3969 Demodulator PCB AS/3970 Reed-Solomon Codec PCB AS/4080 Reed-Solomon Daughter Board (DVB Standard)

AS/4524

Refer to Appendix A for more information.

1.1.3.2 8PSK/16QAM

The 8PSK modulation type is a PSK encoding method for providing a modulated carrier at 6.0 to 51.84 Mbit/s by pragmatic trellis encoding at 2/3 and 5/6 code rates. This option is installed at the factory.

The 16QAM is an encoding method for providing a modulated carrier at 6.0 to

51.84 Mbit/s in 3/4 and 7/8 rates.

Interface PCB Type 2 and 3 (or greater)

AS/3971-2

AS/3971-3 Display/M&C PCB AS/2305 Rev. C4 (or greater) Modulator PCB AS/3969-1, -2, -5, and -6 Demodulator PCB AS/3970-1 and -2 Reed-Solomon Codec PCB AS/4080

Note:

The Reed-Solomon option is required for 8PSK/16QAM operation.

1–6 Rev. 4

SDM-9000 Satellite Modem Introduction

1.1.3.3 Direct Broadcast Satellite

As implemented in the SDM-9000, Direct Broadcast Satellite (DBS) mode supports data rates up to 44.736 Mbit/s using a single FEC channel. Single channel implementation differs significantly from the International Telecommunications Satellite Organisation (INTELSAT) specifications (for carriers greater than 10 Mbit/s) for communicating the data across three channels.

Refer to Appendix A for more information.

Rev. 4 1–7

Introduction SDM-9000 Satellite Modem

1.2 Modem Assemblies

The following table reflects the possible configurations available for the SDM-9000:

Interface

Configuration Type Chassis P/N Mod Demod.

70/140 MHz Duplex AC 3966-1 X QPSK 70/140 MHz TX AC 3966-1 X 70/140 MHz RX AC 3966-1 X 8PSK/

70/140 MHz Duplex DC 3966-2 70/140 MHz TX DC 3966-2 70/140 MHz RX DC 3966-2

The current main assemblies, options, and alternates for the modem are listed in the table below:

Type

16QAM

Part

Number

AS/3965 Assy, Top SDM-9000 PL/3966-1 Assy, Chassis, AC CE Mark PL/3966-2 Assy, Chassis, DC PL/3978 Motherboard PL/2305 Display/M onitor & C ontrol No FW/ included PL/4124-1 Filter, Nyquist TX PL/4124-2 Filter, Nyquist RX PL/4109 Supply, Power AC Alternate PL/4110 Supply, Power AC Preferred

Description Comments

The following table outlines the options available for a specific SDM-9000 configuration:

Output Oscillator Data

Format

50 75 50

50 75

Ω

Ω Ω Ω

Ω

Ω Ω

Standard QPSK

8PSK 16QAM

Standard QPSK

8PSK

16QAM Standard QPSK 3969-3 3995-33 3970-3 4401-31 Standard QPSK 3969-4 3995-34 3970-4 4401-32 HI Stability QPSK

8PSK

16QAM HI Stability QPSK

8PSK

16QAM HI Stability QPSK 3969-7 3995-37 3970-3 4401-31 HI Stability QPSK 3969-8 3995-38 3970-4 4401-32

Mod P/N RF Mod

P/N

3969-1 3995-33 3970-1 4401-31

3969-2 3995-34 3970-2 4401-32

3969-5 3995-37 3970-1 4401-31

3969-6 3995-38 3970-2 4401-32

Demod

P/N

RF Demod

P/N

1–8 Rev. 4

+ 226 hidden pages

Comtech EF Data SDM-9000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Errata A

Errata B

Errata C

Customer Support

Table of Contents

Overview of Changes to Previous Edition

About this Manual

Related Documents

Conventions and References

European EMC Directive

Reporting Comments or Suggestions Concerning this Manual

Warranty Policy

Limitations of Warranty

Exclusive Remedies

Disclaimer

1.1 Overview

1.1.1 Nyquist Filter Printed Circuit Boards

1.1.2 Description

1.1.3 Options

1.2 Modem Assemblies