Comtech EF Data SDM-9000 User Manual

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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

SDM-9000 Satellite Modem Introduction

The following table reflects the relationship of the interface card (MIL-STD-188) with Reed-Solomon:

ReedInterface Card (MIL-STD-188)

Condition

Base 4477-13 Buffer 4477-23 Buffer with ESC 4477-33 Buffer with Reed Solomon 4477-23 4080 4524 ESC with Reed-Solomon 4477-33 4080 4524

P/N

Solomon

(IDR STD)

P/N

(DVB STD)

The following table reflects the relationship of the interface card (ECL) with Reed-Solomon:

Reed Solomon

(IDR STD)

P/N

Condition ECL P/N

Base 4477-11 Buffer 4477-21 ESC 4477-31 Buffer with Reed Solomon 4477-21 4080 4524 ESC with Reed-Solomon 4477-31 4080 4524

Reed

Solomon

P/N

Reed

Solomon

(DVB STD)

P/N

The following table reflects the relationship of the interface card (G.703) with Reed-Solomon:

Reed Solomon

(IDR STD)

P/N

Condition G.703 P/N

Base 3971-1 Buffer 3971-2 ESC 3971-3 Buffer with Reed Solomon 3971-2 4080 4524 ESC with Reed-Solomon 3971-3 4080 4524 Without Buffer 5618-1 Buffer, 8 Mbit/s 5618-2 4080 4524 ESC, 64kbit/s, 8 Mbit/s 5618-3 4080 4524

Solomon

(DVB STD)

Reed

P/N

Rev. 4 1–9

Introduction SDM-9000 Satellite Modem

1.3 Modem Specifications

Table 1-1 lists the operating specifications of the modem.

Table 1-1. SDM-9000 Specifications

General Specifications

Operating Frequency Range 50 to 180 MHz, synthesized in 2.5 kHz steps Modulation Types

Operating Channel Spacing Less than 0.5 dB degradation operating with 2 adjacent like BER See Tables 1-2 through 1-4

Baseband Interface:

MIL-STD-188 ECL G.703

Elastic Buffer 2 to 32 ms, selectable from front panel Digital Data Rate 6.0 to 51.84 Mbit/s, in 1 bit steps Scrambling/Descrambling Types

Forward Error Correction:

Viterbi K=7 Reed-Solomon

Pragmatic Trellis M&C Front panel display (16 character by 2 rows) Filter Mask Types INTELSAT ESC IDR or None, field selectable Loopback Modes

Diagnostic Features

Prime Power 90 to 264 VAC, 47 to 63 Hz,

Size Weight

• QPSK at 1/2, 3/4, and 7/8 rates

• 8PSK trellis at 2/3 and 5/6 rates (optional)

• 16QAM at 3/4 and 7/8 rates (optional)

channels, each 10 dB higher at 1.3 times the symbol rate

6 to 13 Mbit/s 6 to 51.84 Mbit/s

8.448 Mbit/s

32.064 Mbit/s

34.368 Mbit/s

44.736 Mbit/s

51.840 Mbit/s

• V.35 (per CCITT V.35)

• IDR (per IESS-308)

• EFD (SDM-450 compatible)

Rates:

1/2, 3/4, 7/8 Optional 2/3 and 5/6

• Baseband (near end)

• Interface (near end and far end)

• IF/RF

• IF/RF loopbacks

• Baseband/Interface loopbacks

• Fault monitoring (includes current/stored faults)

• BER monitoring

• Input IF power monitoring

• Buffer fill status monitoring

• Remote control via serial port

200W maximum, fused at 2A 38 to 64 VDC

Physical

3.5” H x 19.0” W x 20.0” D (2 RU) (see Figure 2-1) 19 lbs. (approximate)

1–10 Rev. 4

SDM-9000 Satellite Modem Introduction

Environmental

Temperature Range Humidity

0 to 50°C 0 to 95%, noncondensing

Additional Modulator Specifications

Output Power -20 to +5 dBm, adjustable in 0.1 dB steps

Accuracy

0.5 dB

Output Spurious and Harmonics -55 dBc Output Impedance 75Ω (50Ω optional) Output Return Loss > 18 dB Output Frequency Stability Internal Data Clock Stability

10 PPM (± 0.2 PPM with high stability option)

10 PPM internal oscillator

0.2 PPM with high stability option

Additional Demodulator Specifications

Input Power (Desired Carrier) -45 to -25 dBm Input Impedance 75Ω (50Ω optional) Input Return Loss > 18 dB Carrier Acquisition Range Clock Acquisition Range

60 kHz maximum

100 PPM

Remote Control Specifications

Serial Interface RS-232-C or RS-485 Baud Rate 110 to 19200 bit/s Functions Controlled

• Transmit/Receive frequency

• Transmit power

• Transmitter on/off

• Data rate/modulation

• RF/IF loopback

• Baseband/Interface loopbacks

• Scrambler/Descrambler types

• Scrambler/Descrambler on/off

• Buffer clock TX/RX/INT/EXT

• Receive clock normal/invert

• Differential encoding and decoding

• Transmit and receive overhead type

• IDR backward alarm control on/off

• Reed-Solomon on/off

• Mod and demod spectrum norm/invert

• Sweep width range

• Rev emulation current/functional

Signals Monitored

• Raw error rate

• Corrected BER

• Receive E

b/N0

• Receive signal level

• Receive carrier detect

• Power supply voltages

• Fault status

• Current sweep value

• Stored fault status

Configuration Retention Will maintain current configuration for at least one year

without power

Addressing Programmable to 1 of 255 possibilities; address 0 reserved

for global addressing

Note:

Local control of all remote functions included by push-button entry.

Rev. 4 1–11

Introduction SDM-9000 Satellite Modem

1.4 BER Performance Specifications

The bit energy-to-noise ratios (Eb/N0) required to achieve 10-3 to 10 (BERs) are listed in Tables 1-2 through 1-4. The BER performance curves are shown in

the following figures:

Figure Modulation

1-4 QPSK 1-5 QPSK (with Reed-Solomon) 1-6 8PSK (with Reed-Solomon) 1-7 16QAM (with Reed-Solomon)

1.4.1 Viterbi Decoder BER (QPSK)

The Viterbi specifications for the Eb/N0 required to achieve 10-3 to 10 coding configurations are shown in Table 1-2. All values are for operation in QPSK

mode.

Performance measurements are recorded with transmit and receive IF connected back-to-back through an additive white Gaussian noise channel. Refer to Figure 1-4 for the Viterbi BER curves.

-10

Bit Error Rates

-8

BER for different

Table 1-2. Viterbi Decoder BER Data

Specification

BER 1/2 Rate 3/4 Rate 7/8 Rate

-3

10 10 10 10 10 10

BER 1/2 Rate 3/4 Rate 7/8 Rate

10 10 10 10 10 10

4.2 dB 5.2 dB 6.4 dB

-4

4.8 dB 6.0 dB 7.2 dB

-5

5.4 dB 6.7 dB 7.9 dB

-6

6.0 dB 7.5 dB 8.6 dB

-7

6.6 dB 8.2 dB 9.2 dB

-8

7.2 dB 8.8 dB 9.9 dB

Typical

-3

3.8 dB 4.8 dB 6.0 dB

-4

4.2 dB 5.5 dB 6.6 dB

-5

4.9 dB 6.1 dB 7.3 dB

-6

5.5 dB 6.7 dB 8.0 dB

-7

6.1 dB 7.6 dB 8.6 dB

-8

6.7 dB 8.2 dB 9.3 dB

1–12 Rev. 4

SDM-9000 Satellite Modem Introduction

-2

-3

-4

-5

-6

BER

-7

-8

-9

-10

3.0 4.0 5.0 6.0

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

1/2 RATE 3/4 RATE

SPECIFICATIONS

7/8 RATE

7.0 8.0 9.0 10.0 11.0

(dB)

b/N0

Rev. 4 1–13

Introduction SDM-9000 Satellite Modem

1.4.2 Reed-Solomon Codec BER (QPSK)

The Reed-Solomon specifications for the Eb/N0 required to achieve 10-6 to 10

-10

different configurations are shown in Table 1-3. All values are for QPSK mode operation. Refer to Figure 1-5 for the Reed-Solomon BER curves.

Table 1-3. Reed-Solomon BER Data

Specification

BER 1/2 Rate 3/4 R ate 7/8 Rate

-6

10 10 10

BER 1/2 Rate 3/4 R ate 7/8 Rate

10 10 10

4.1 dB 5.6 dB 6.7 dB

-7

4.2 dB 5.8 dB 6.9 dB

-8

4.4 dB 6.0 dB 7.1 dB

-10

4.7 dB 6.4 dB 7.5 dB

Typical

-6

3.5 dB 5.0 dB 6.1 dB

-7

3.6 dB 5.2 dB 6.3 dB

-8

3.8 dB 5.4 dB 6.5 dB

-10

4.1 dB 5.8 dB 6.9 dB

BER for

1–14 Rev. 4

SDM-9000 Satellite Modem Introduction

-2

-3

-4

-5

-6

BER

-7

-8

-9

-10

3.0 4.0 5.0 6.0

1/2 RATE 7/8 RATE

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

3/4 RATE

SPECIFICATIONS

7.0 8.0 9.0 10.0 11.0

(dB)

b/N0

Rev. 4 1–15

Introduction SDM-9000 Satellite Modem

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 10-9 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

8PSK 8PSK 16QAM 16QAM

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

-6

10 10 10 10

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

10 10 10 10

6.1 dB 8.2 dB 8.3 dB 9.8 dB

-7

6.4 dB 8.5 dB 8.5 dB 10.0 dB

-8

6.6 dB 8.9 dB 8.7 dB 10.3 dB

-9

6.9 dB 9.3 dB 8.9 dB 10.5 dB

Typical

8PSK 8PSK 16QAM 16QAM

-6

5.6 dB 7.7 dB 7.8 dB 9.4 dB

-7

5.8 dB 7.9 dB 8.1 dB 9.7 dB

-8

6.1 dB 8.4 dB 8.3 dB 9.9 dB

-9

6.3 dB 8.7 dB 8.6 dB 10.2 dB

1–16 Rev. 4

SDM-9000 Satellite Modem Introduction

-2

-3

-4

-5

-6

BER

-7

-8

-9

-10

3.0 4.0 5.0 6.0

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

2/3 RATE

(WITH R-S )

SPECIFICATIONS

5/6 RATE

(WITH R-S )

7.0 8.0 9.0 10.0 11.0

(dB)

b/N0

Rev. 4 1–17

Introduction SDM-9000 Satellite Modem

-2

-3

-4

-5

-6

BER

-7

-8

-9

-10

4.0 5.0 6.0

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

3/4 RATE

(WITH R-S )

SPECIFICATIONS

7/8 RATE

(WITH R-S )

7.0 8.0 9.0 10.0 11.0

(dB)

b/N0

12.0

1–18 Rev. 4

SDM-9000 Satellite Modem Introduction

A typical spectral occupancy curve is shown in Figure 1-8.

Figure 1-8. SDM-9000 Typical Spectral Occupancy

Rev. 4 1–19

Introduction SDM-9000 Satellite Modem

This page is intentionally left blank.

1–20 Rev. 4

This chapter includes instructions for unpacking and installing the modem, a description of the external connections, and backward alarm information.

CAUTION

2.1 Unpacking

The modem and manual are packaged in preformed, reusable cardboard cartons containing foam spacing for maximum shipping protection. The circuit cards are packed in separate cardboard caddypacks (also packaged within the cardboard carton).

Chapter 2.

INSTALLATION

This equipment contains parts and assemblies sensitive to damage by Electrostatic Discharge (ESD). Use ESD precautionary procedures when touching, removing, or inserting PCBs.

Do not use any cutting tool that will extend more than 1” into the containe r and cause damage to the modem.

CAUTION

To remove the modem:

1. Cut the tape at the top of the carton (indicated by OPEN THIS END).

2. Remove the cardboard/foam spacer covering the modem and caddypacks.

3. Remove the modem, caddypacks, manual, and power cord from carton.

4. Save the packing material for storage or reshipment purposes.

5. Inspect the equipment for any possible damage incurred during shipment.

6. Check the equipment against the packing list to ensure the shipment is complete.

7. Refer to Section 2.2 for further system installation instructions.

Rev. 4 2–1

Installation SDM-9000 Satellite Modem

2.2 System Options

The standard SDM-9000 with all PCB assemblies installed (Chapter 1) is a full-duplex QPSK satellite modem. The system can also be configured for TX-only or RX-only operation.

1. For a TX-only system, the demodulator PCB (AS/3970) should be removed.

• Enter the System Utility menu on the front panel and select Operation mode.

• Enter the menu and select TX-only. This will mask the RX faults and stored

faults in the Faults menu.

2. For RX-only system, the modulator PCB (AS/3969) should be removed.

• Enter the System Utility menu on the front panel and select Operation mode.

• Enter the menu and select RX-only. This will mask the TX faults and stored

faults in the Faults menu.

2–2 Rev. 4

SDM-9000 Satellite Modem Installation

2.3 System Installation

Install the modem as follows:

1. Mount the modem chassis in the assigned position of the equipment rack. It is recommended that the modem be supported by a rack-mounted shelf, or the two rear rack-mount brackets supplied with the unit.

Note:

For a custom rack installation, refer to the chassis dimensional drawing in

Figure 2-1.

2. Connect the cables to the proper locations on the rear panel. Refer to Section 2.4 for connector pinouts, placement, and functions.

3. Open the front panel and install the three main PCB assemblies (Figure 1-2) as follows:

a. Install the modulator PCB (AS/3969) in the top slot.

b. Install the interface PCB (AS/3971, AS/4477, or AS/5618) in the middle

slot.

c. Install the demodulator PCB (AS/3970) in the bottom slot.

Note:

The cards are keyed, and will only fit in the proper chassis slot. Verify

the PCBs are properly seated.

4. Before turning on the power switch, verify all interface jumper settings are in their proper positions (Chapter 3), and become familiar with front panel operation (Chapter 4).

5. Turn on the power switch (located inside the front panel).

6. Check for the proper TX output signal level and spectrum.

7. Check for the proper RX input signal level and spectrum.

8. If there is any installation problem, refer to Chapter 6 for troubleshooting assistance.

Rev. 4 2–3

Installation SDM-9000 Satellite Modem

Note:

All dimensions are listed in inches.

Figure 2-1. SDM-9000 Dimensional Drawing

2–4 Rev. 4

SDM-9000 Satellite Modem Installation

2.4 External Connectors

When a breakout panel is not required, the external modem connections between the modem and other equipment are made through several rear panel connectors. These connectors are shown in Figure 2-2, and their locations are listed in Table 2-1. The connectors are described in the following paragraphs.

When a B141-1 breakout panel is required, refer to the B141-1 Breakout Panel Installation and Operation Manual for connector information.

Figure 2-2. SDM-9000 Rear Panel View

Note:

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

Table 2-1. Modem Rear Panel Connectors

Name Ref.

Desig.

TX/IF OUTPUT CP1 BNC RF output

RX/IF INPUT CP2 BNC RF input

RECEIVE DATA CP3 BNC RX terrestrial data input

SEND DATA CP4 BNC TX terrestrial data input

EXT CLK CP5 BNC External clock input

REMOTE J6 9-pin D Remote interface

FAULTS J7 9-pin D Form C fault relay contacts

DATA I/O J8 50-pin D Data I/O (ESC)

AUX1 J9 9-pin D TTL faults

ALARMS J10 9-pin D Form C alarm relay contacts

Connector

Type

Function

External reference AGC output

Rev. 4 2–5

Installation SDM-9000 Satellite Modem

2.4.1 TX/IF Output (CP1)

The TX/IF output connection is a BNC connector used for the transmit IF signal. The output impedance is 75 In normal operation, the output is a modulated carrier with center frequency between 50 and 180 MHz.

(50Ω optional). The output power level is +5 to -20 dBm.

Ω

2.4.2 RX/IF Input (CP2)

The RX/IF input connection is a BNC connector used for the receive IF signal. The input impedance is 75 should be between -25 and -45 dBm. The signal frequency of the receive RX/IF input is between 50 and 180 MHz.

(50Ω optional). For normal operation, the desired carrier signal level

Ω

2.4.3 Receive Data (CP3)

The Receive Data connection is a BNC connector used for the terrestrial data output (G.703 interface only). The output impedance is 75

2.4.4 Send Data (CP4)

The Send Data connection is a BNC connector used for the terrestrial data input (G.703 interface only). The input impedance is 75

2.4.5 External Clock (CP5)

The External Clock connection is a BNC connector used for the external buffer clock input (Ext Clk). The input impedance is 75 only. The external clock input for ECL/MIL-STD-188 interfaces is provided on the J8 connector.

Ω

Ω. This input is used for the G.703 interface

2–6 Rev. 4

SDM-9000 Satellite Modem Installation

2.4.6 Remote (J6)

The remote connector is used to interface the M&C functions to a remote location. This is a Data Circuit Terminating Equipment (DCE) interface that can be either RS-232-C or RS-485. Refer to Appendix B for remote control operation information.

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

RS-485 RS-232-C

4-Wire Mode 2-Wire Mode

Pin # Name Name Pin # Name

1GND GND 1 2 2 RD (RX) 33TD (TX) 4 +TX +RX/TX 4 5 -TX -RX/TX 5 GND 66DSR 77RTS 8 +RX +RX/TX 8 CTS 9-RX-RX/TX 9

Rev. 4 2–7

Installation SDM-9000 Satellite Modem

2.4.7 Fault (J7)

The fault connector is used to provide Form C contact closures for fault reporting. The three Form C summary fault contacts are:

• Transmit faults

• Receive faults

• Common equipment faults

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

The fault interface 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.

Signal Function Name Pin #

Common equipment is OK NO 1

Common COM 2

Common equipment is faulted NC 3

Transmit is OK NO 4

Common COM 5

Transmit is faulted NC 6

Receive is OK NO 7

Common COM 8

Receive is faulted NC 9

Note:

A connection between the common (COM) and normally open (NO) contacts indicates no fault.

2–8 Rev. 4

SDM-9000 Satellite Modem Installation

2.4.8 DATA I/O (ESC) Interface (J8)

The DATA I/O (ESC) connection is a 50-pin female D connector located on the rear panel of the modem. Screw locks are provided for mechanical security of the mating connector.

The J8 connector is used to interface data input/output and ESC signals to and from the modem. The configuration of J8 depends on the following interface types:

• G.703

•ECL

•PECL

• MIL-STD-188

The DATA I/O pinout will be different for each of the interface configurations. The interface pinouts are listed in the following sections. Refer to the following Notes for additional data applying to each condition.

Notes:

1. Backward alarm relay contacts named for normal no-fault condition (BWOx–C connected to BWOx–NC if no fault).

2. Backward alarm inputs must be grounded or pulled logic low to clear alarm.

3. Signals MF, DF, and DMA are open-collector high-impedance, if faulted. MF and DF are used by M:N protection switch, if used in redundant system.

4. Relay contacts DF–C and DF–NO named for faulted condition (DF–C connected to DF–NO unless Demod fault).

Rev. 4 2–9

Installation SDM-9000 Satellite Modem

2.4.8.1 G.703 (IDR) Interface (J8) (Audio Mode)

Signal Function Name Pin #

Ground GND 1, 2 8 kbit/s TX data input (RS-422) TXD–A 37

TXD–B 38

8 kHz TX clock output (RS-422) TXC–A 21

TXC–B 22

1 kHz TX octet input (RS-422) TXO–A 4

TXO–B 5

8 kbit/s RX data output (RS-422) RXD–A

RXD–B

8 kHz RX clock output (RS-422) RXC–A 23

RXC–B 24

1 kHz RX octet output (RS-422) RXO–A 6

RXO–B 7

ADPCM 1 audio input A1I–A 45

A1I–B 29

ADPCM 1 audio output A1O–A 46

A1O–B 30

ADPCM 2 audio input A2I–A 47

A2I–B 31

ADPCM 2 audio output A2O–A 48

A2O–B 32

Backward alarm 1 output BWO1–C 8

BWO1–NC 25 BWO1–NO 41

Backward alarm 2 output BWO2–C 9

BWO2–NC 26 BWO2–NO 42

Backward alarm 3 output BWO3–C 10

BWO3–NC 27 BWO3–NO 43

Backward alarm 4 output BWO4–C 11

BWO4–NC 28

BWO4–NO 44 Backward alarm 1 input BWI1 12 Backward alarm 2 input BWI2 13 Backward alarm 3 input BWI3 14 Backward alarm 4 input BWI4 15 Modulator fault (TTL) MF 49 Demodulator fault (TTL) DF 33 Deferred maintenance alarm DMA 17 Demodulator fault relay DF–C 16

DF–NO 50 AGC output

AGC–OUT 3 (receive input, if level)

39 40

(Note 1)

(Note 2) (Note 2) (Note 2) (Note 2) (Note 3) (Note 3) (Note 3) (Note 4)

2–10 Rev. 4

SDM-9000 Satellite Modem Installation

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

Signal Function Name Pin #

Ground GND 1, 2 8 kbit/s TX data input (RS-422) TXD–A 37

TXD–B 38

8 kHz TX clock output (RS-422) TXC–A 21

TXC–B 22

1 kHz TX octet input (RS-422) TXO–A 4

TXO–B 5

8 kbit/s RX data output (RS-422) RXD–A 39

RXD–B 40

8 kHz RX clock output (RS-422) RXC–A 23

RXC–B 24

1 kHz RX octet output (RS-422) RXO–A 6

RXO–B 7

64 kbit/s send data input (RS-422) E-SD-A

E-SD-B 64 kHz receive timing out (RS-422)

E-RT-A

E-RT-B 64 kHz send timing out (RS-422) E-ST-A 47

E-ST-B 31 64 kbit/s receive data out (RS-422) E-RD-A

E-RD-B Backward alarm 1 output BWO1–C 8

BWO1–NC 25

BWO1–NO 41 Backward alarm 2 output BWO2–C 9

BWO2–NC 26

BWO2–NO 42 Backward alarm 3 output BWO3–C 10

BWO3–NC 27

BWO3–NO 43 Backward alarm 4 output BWO4–C 11

BWO4–NC 28

BWO4–NO 44 Backward alarm 1 input BWI1 12 Backward alarm 2 input BWI2 13 Backward alarm 3 input BWI3 14 Backward alarm 4 input BWI4 15 Modulator fault (TTL) MF 49 Demodulator fault (TTL) D F 33 Deferred maintenance alarm DMA 17 Demodulator fault relay DF–C

DF–NO AGC output

AGC–OUT 3 (receive input, if level)

45 29 46 30

48 32

16 50

(Note 1)

(Note 1

(Note 1)

(Note 2) (Note 2) (Note 2) (Note 2) (Note 3) (Note 3) (Note 3) (Note 4)

)

Rev. 4 2–11

Installation SDM-9000 Satellite Modem

2.4.8.3 ECL Interface (J8)

Signal Function Name Pin #

Ground GND 1, 2 Send data input TXD–A (ECL-) 37

TXD–B (ECL+) 38

Terrestrial timing input (TT) TXO–A (ECL-) 4

TXO–B (ECL+) 5

SYNC TX frame input (TX SY N C) SD–A (ECL-) 34

SD–B (ECL+) 18

Send timing output (ST) TXC–A (ECL-) 21

TXC–B (ECL+) 22

Receive data output (RD) RXD–A (ECL-) 39

RXD–B (ECL+) 40

Receive timing output (RT) RX C–A (EC L-) 23

RXC–B (ECL+) 24

SYNC RX frame output (RX SYNC) RD–A (ECL-) 36

RD–B (ECL+) 20

External clock input (EXC) EXC- (ECL-) 35

EXC+ (ECL+) 19

ADPCM 1 audio input A1I–A 45

A1I–B 29

ADPCM 1 audio output A1O–A 46

A1O–B 30

ADPCM 2 audio input A2I–A 47

A2I–B 31

ADPCM 2 audio output A2O–A 48

A2O–B 32

Backward alarm 1 output BWO1–C 8

BWO1–NC 25 BWO1–NO 41

Backward alarm 2 output BWO2–C 9

BWO2–NC 26 BWO2–NO 42

Backward alarm 3 output BWO3–C 10

BWO3–NC 27 BWO3–NO 43

Backward alarm 4 output BWO4–C 11

BWO4–NC 28

DF–NO 50 AGC output (receive input, if level) AGC–OUT 3

(Note 1

(Note 1)

(Note 2) (Note 2 (Note 2) (Note 2) (Note 3) (Note 3

(Note 3)

(Note 4

)

2–12 Rev. 4

SDM-9000 Satellite Modem Installation

2.4.8.4 MIL-STD-188 Interface (J8)

Signal Function Name Pin #

Ground GND 1, 2 Send data input TXD–A 37

TXD–B 38

Terrestrial timing input (TT) TXO–A 4

TXO–B 5

Request to send input (RTS) SD–A 34

SD–B 18

Send timing output (ST) TXC–A 21

TXC–B 22

Receive data output (RD) RXD–A 39

RXD–B 40

Receive timing output (RT) RXC–A 23

RXC–B 24

Data mode output (DM/DSR) RD–A 36

RD–B 20

External clock input (EXC) EXC- 35

EXC+ 19

Receiver ready output (RR/RLSD) RXO–A 6

RXO–B 7

ADPCM 1 audio input A1I–A 45

A1I–B 29

ADPCM 1 audio output A1O–A 46

A1O–B 30

ADPCM 2 audio input A2I–A 47

A2I–B 31

ADPCM 2 audio output A2O–A 48

A2O–B 32

Backward alarm 1 output BWO1–C 8

BWO1–NC 25 BWO1–NO 41

Backward alarm 2 output BWO2–C 9

BWO2–NC 26 BWO2–NO 42

Backward alarm 3 output BWO3–C 10

BWO3–NC 27 BWO3–NO 43

Backward alarm 4 output BWO4–C 11

BWO4–NC 28

DF–NO 50 AGC output (receive input, if level) AGC–OUT 3

(Note 1)

(Note 2) (Note 2) (Note 2) (Note 2) (Note 3) (Note 3) (Note 3) (Note 4)

Rev. 4 2–13

Installation SDM-9000 Satellite Modem

2.4.9 AUX 1 (J9)

The Auxiliary 1 (AUX 1) connector provides:

• TTL faults

• External high stability reference

• AGC output voltage

The faults are open collector levels to indicate a modulator or demodulator failure. A logic 1 indicates the faulted condition. The signals are primarily used in operating a protection switch.

The external high stability reference clock input is 5, 10, or 20 MHz. AGC-OUT is the voltage for a receive signal level between -25 and -50 dBm.

The AUX 1 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.

Signal Function Name Pin #

Ground GND 5, 6, 8 External reference EXT –REF 2 Transmit fault MDTTLFLT 4 Receive fault DMTTLFLT 7 AGC output (Receive input, IF level)

AGC–OUT 1

2–14 Rev. 4

SDM-9000 Satellite Modem Installation

2.4.10 Alarms (J10)

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.

Signal Function Name Pin #

Alarm 1 is OK NO 1 Common COM 2 Alarm 1 is faulted NC 3 Alarm 2 is OK NO 4 Common COM 5 Alarm 2 is faulted NC 6 Alarm 3 is OK NO 7 Common COM 8 Alarm 3 is faulted NC 9

Note:

A connection between the common (COM) and normally open (NO) contacts

indicates no alarm.

Rev. 4 2–15

Installation SDM-9000 Satellite Modem

2.4.11 AC Power

The AC power is supplied to the modem by a standard detachable, non-locking, 3-prong power cord (IEC plug). Normal input voltage is 90 to 264 VAC, 47 to 63 Hz. The power supply will automatically switch between ranges. Maximum power consumption is less than 200W.

2.4.12 DC Power

The DC power is supplied to the modem by a standard detachable, non-locking, 3-prong power cord (IEC plug). Normal input voltage is 38 to 64 VDC.

2.4.13 Ground (GND)

A #10-32 stud on the rear panel of the modem is used for connecting a common chassis ground between all equipment.

Note:

The safety ground is provided through the AC power connector.

2–16 Rev. 4

This chapter describes the hardware and software configuration of the modem.

Note:

3.1 Display/M&C

The Display/M&C PCB (AS/2305) is located on the front panel of the modem. Figure 3-1 shows the Display/M&C card and the jumper locations. The jumper settings are listed in Table 3-1.

All modem functions can be remotely controlled and monitored via an RS-485/ RS-232-C communications link. The 2- or 4-wire, half-duplex RS-485 interface makes it possible to operate 1 to 255 modems on a common communications link. The RS-232-C interface is used to communicate with a single modem.

Chapter 3.

CONFIGURATION

All jumper settings are described in their appropriate tables.

The M&C module must be hardware configured to one of the two interfaces as listed in Table 3-1.

Rev.4 3–1

Configuration SDM-9000 Satellite Modem

ASSEMBLY NUMBER AND SERIAL NUMBER

JP2JP3JP1 JP5

Figure 3-1. Display/M&C PCB

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

Jumper Position Function

JP1 1 to 2

3 to 4 5 to 6 7 to 8

(

JP2

See Note

) 1 to 2

2 to 3

JP3

(

See Note

)

1 to 2 2 to 3

JP5 1 to 2

2 to 3

JP9 and JP10 32K

64K 128K 256K 256K

Note:

Pins JP2 and JP3 must be in the 4-wire position for RS-232-C.

RS-485 Remote RS-485 Remote RS-232-C Remote RS-232-C Remote 4-Wire 2-Wire 4-Wire 2-Wire RS-485 Remote RS-232-C Remote 27C256 EEPROM at U17 27C512 EEPROM at U17 27C010 EEPROM at U17 27C020 EEPROM at U17 27C040 EEPROM at U17

JP9 JP10

RS-485 Configuration Install two jumpers (shunts) at the RS-485 positions of JP1, and

install one jumper at the RS-485 position of JP5. For 2- or 4-wire operation, position jumpers at JP2 and JP3 to the designated positions.

RS-232-C Configuration Install two jumpers (shunts) at the RS-232-C positions of JP1, and

install one jumper at the RS-232-C position of JP5. Install jumpers at JP2 and JP3 for 4-wire operation.

3–2 Rev. 4

SDM-9000 Satellite Modem Configuration

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

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

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

Rev.4 3–3

Configuration SDM-9000 Satellite Modem

3.3 Demodulator

The demodulator PCB (AS/3970) is located in the bottom slot of the modem chassis. The jumper settings are listed in Table 3-3. Figure 3-3 shows the demodulator card and the location of jumper JP5.

Table 3-3. Demodulator PCB Jumper Settings

Jumper Position Function

JP5 (EEPROM size select) 1 to 2

2 to 3

Note:

The demodulator PCB jumpers in Table 3-3 are factory set.

27C256 (32K EEPROM) 27C512 (64K EEPROM)

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

3–4 Rev. 4

SDM-9000 Satellite Modem Configuration

3.4 Interface

The interface PCB (AS/3971, AS/4477, or AS/5618) is located in the middle slot of the modem chassis. The three interface configurations are:

AS/3971 G.703 AS/4477 ECL/MIL-STD-188-144 AS/5618-3 G.703 with 64 kbit/s ESC

Note:

The AS/5618-3 G.703 interface assembly supports one 64 kbit/s data channel or

two 32 kbit/s audio channels (per IESS-308, Rev. 8A). The modem can provide independent transmit (TX) and receive (RX) of audio or digital 64 kbit/s data. This allows four possible applications:

• TX and RX: one 64 kbit/s data channel

• TX and RX: two 32 kbit/s audio channels

• TX: one 64 kbit/s data channel while RX: two 32 kbit/s audio channels

• TX: two 32 kbit/s audio channels while RX: one 64 kbit/s data channel

The jumper settings are listed in Table 3-4. Figure 3-4 (AS/3971) and Figure 3-5 (AS/4477) show the interface cards and the locations of jumper JP1.

See Table 3-4 for the appropriate jumper settings for a particular application.

Table 3-4. Interface Configuration Jumper Settings

AS/3971 Interface Only

Jumper Position Function

JP1 (EEPROM size select) 1 to 2

2 to 3

AS/5618-3 G.703 Interface Only

Channel Jumper Position Function

TX JP7

(Jumper block)

RX JP6

(Jumper block)

Note:

See options, Appendix A for additional timing information.

1 to 2 2 to 3 1 to 2 2 to 3

27C256 (32K EEPROM) 27C512 (64K EEPROM)

64 kbit/s Audio 64 kbit/s Audio

Rev.4 3–5

Configuration SDM-9000 Satellite Modem

JP1

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

3–6 Rev. 4

SDM-9000 Satellite Modem Configuration

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

Rev.4 3–7

Configuration SDM-9000 Satellite Modem

JP7 JP6

JP1

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

3–8 Rev. 4

SDM-9000 Satellite Modem Configuration

3.5 Nyquist Filter Configuration

The Nyquist filter (AS/4124) is a 4.5” x 5.0” daughter card that is located on the modulator and demodulator PCBs. The filters are capable of supporting four data/code rate and modulation type combinations per card. There is one TX card and one RX card:

Type Part Number Used with

TX PCB AS/4124-1 Baseband Modulator PCB (AS/3969) RX PCB AS/4124-2 Baseband Demodulator PCB (AS/3970)

The filters include a factory programmable device that contains:

• Data Rates

• Coding Rates

• Symbol Rates

• Options

This information is programmed into the filter PCB at calibration time. A label indicates the symbol rates of the populated filters. For example, a Nyquist filter may be required with four symbol rates as follows:

• 21.376 MHz

• 22.912 MHz

• 29.824 MHz

• 34.560 MHz

Configuration information is recovered from the filter PCBs during system power-up and initialization. The filter configuration information is available to the user. Refer to Chapter 4 for the Configuration Modulator, Configuration Demodulator, and Utility menus.

Rev.4 3–9

Configuration SDM-9000 Satellite Modem

3.5.1 Compatibility

For proper modem operation, the installed interface, modulator, and demodulator must be compatible with the installed filters. Refer to the following table for baseband interface data rates.

Interface Type Data Rates

G.703 8.448 Mbit/s

32.064 Mbit/s

34.368 Mbit/s

44.736 Mbit/s

51.840 Mbit/s ECL/PECL 6.0 to 52.0 Mbit/s, in 1 bit/s steps MIL-STD-188 6.0 to 13.0 Mbit/s, in 1 bit/s steps

3.5.2 Installation

Installation instructions for the field-installed Nyquist filters (AS/4124) include:

• Unpacking/initial inspection

• Tools required

• Installation procedure

3.5.2.1 Unpacking Instructions

This equipment contains parts and assemblies sensitive to damage by ESD. Use ESD precautionary procedures when touching, removing, or inserting

CAUTION

PCBs.

1. Remove the Nyquist filter PCB and mounting hardware from the cardboard caddypack and anti-static material.

2. Check packing list to ensure the shipment is complete.

3. Inspect the Nyquist filter PCB for any shipping damage. Ensure all ICs are seated properly.

3–10 Rev. 4

SDM-9000 Satellite Modem Configuration

3.5.2.2 Tools Required

The following tool is required to accomplish the task of this section:

Tool Description

Driver, Nut 1/4-inch

3.5.2.3 Installation Procedure

Note:

The Nyquist filter PCB is field-replaceable to enable the user to install optional

data rates.

1. Install the Nyquist filter PCB as a daughter card on the modulator or demodulator PCB as follows:

Type Part Number Used with

TX PCB AS/4124-1 Baseband Modulator PCB (AS/3969) RX PCB AS/4124-2 Baseband Demodulator PCB (AS/3970)

a. Ensure that each filter has three 10-pin connectors for I/O and power.

b. Mount the card on the four standoffs with a 1/4” hex nut on each standoff to

secure the PCB. Tighten each nut using the 1/4” nut driver.

2. Refer to Figure 3-7 for connector locations.

3.5.2.3.1 Nyquist Filter Removal

1. Remove the TX filter (AS/4124-1) or RX filter (AS/4124-2) as follows:

a. Open the modem front door and turn off the power.

b. Remove the modulator or demodulator PCB from the modem and place on a

static-free work area.

c. Remove the four 1/4” hex nuts that secure the filter card (AS/4124-X) using

the 1/4” nut driver.

Note:

Do not remove the screws and standoffs from the modulator or

demodulator. Remove the four hex nuts only.

2. Carefully unplug the filter card from the modulator or demodulator connectors.

Rev.4 3–11

Configuration SDM-9000 Satellite Modem

Figure 3-7. Nyquist Filter Installation

3–12 Rev. 4

SDM-9000 Satellite Modem Configuration

3.5.2.3.2 Nyquist Filter Replacement

1. Replace the TX filter (AS/4124-1) or RX filter (AS/4124-2) as follows:

a. Remove the TX/RX filter card (AS/4124) in accordance with

Section 3.5.2.3.1.

b. Carefully install the TX/RX filter card on the three 10-pin connectors.

Note:

The TX/RX filter cards are keyed for easy installation.

TX Filter

Connectors

Filter Modulator Filter Demodulator

JP1 JP1 JP1 P1 JP2 JP2 JP2 P3 JP3 JP4 JP3 P2

RX Filter

Connectors

Ensure the connector pins are not bent during installation.

CAUTION

c. Install the four 1/4” hex nuts to the standoffs, and tighten using the 1/4” nut

driver.

2. Install the modulator or demodulator in the modem.

Rev.4 3–13

Configuration SDM-9000 Satellite Modem

3.6 Software Configuration

This section consists of the following software information:

• Revision emulation feature

• Programming the remote baud rates/addresses

• Modem defaults

3.6.1 Revision Emulation

The modem includes a revision emulation feature that allows the user to program an emulation mode of a previous functional revision. This feature is accessed through the Utility Modem Type menu (refer to Chapter 4). The user can emulate Version 1.1.1 through the current version by selecting a functional number at the Rev. Emulation menu (refer to Table 3-5).

Table 3-5. SDM-9000 Revision Emulation

Functional # Software

Version

1 1.1.1 4100-1- Original version 2 2.1.1 4100-1A Software changes 3 3.1.1 4100-1B Software changes 3 3.1.2 4100-1C Correctional Setting 4 4.1.1 4100-1D Software changes 5 5.1.1 4100-1E Software changes 6 6.1.1 4100-1F Software changes

Firmware # Description of Change

Notes:

1. Programming a functional number (1 through X) eliminates all changes

(disables new features/options) for the later version numbers. For example, functional number 3 may eliminate some features/options for Version 4.1.1 or greater.

2. Programming Current Version (default) allows all features and options to

operate (if installed).

3. The user must manually program the functional version on a cold-start

(default is Current Version).

4. Revision emulation will not affect some user interface changes that do not

affect direct operation of the modem. For example: Configuration Save/Recall; cosmetic changes; Test Mode screen in the Utility System menu; all Factory Setup modes, and so forth.

3–14 Rev. 4

SDM-9000 Satellite Modem Configuration

3.6.2 Remote Interface Specification

Refer to Appendix B for remote control operation information.

3.6.2.1 Remote Baud Rate

The remote communications baud rate and parity are programmed by the front panel control in the Utility System menu (refer to Chapter 4). The programmed baud rate and parity are maintained indefinitely by use of the EEPROM on the M&C module. The parity bits can be set to EVEN, ODD, or NONE (with 8 data bits). The available baud rates (bit/s) are listed below:

• 110

• 150

• 300

• 600

• 1200

• 2400

• 4800

• 9600

• 19200

3.6.2.2 Remote Address

To communicate with the established remote communications protocol, each modem must be configured for one address between 1 and 255. Address 0 is reserved as a global address that simultaneously addresses all devices on a given communications link. Each modem on a common remote communications link (RS-485) must have a distinct address.

The addresses are programmed by front panel control in the Utility System menu and maintained in EEPROM.

Rev.4 3–15

Configuration SDM-9000 Satellite Modem

3.6.3 Modem Defaults

With certain exceptions, the M&C default settings are loaded into the modem after a hard reset (refer to Chapter 4). The defaults are listed in Table 3-6.

In the case of the exceptions, the settings last saved are retained. Exceptions include the following:

• Address

• Parity

• Baud Rate

• Ext AGC: Minimum Pwr

• Ext AGC: Maximum Pwr

• Display Contrast

Table 3-6. Modem Defaults

Modulator Defaults Demodulator Defaults

Data Rate IF Frequency 70 MHz IF Frequency 70 MHz IF Output OFF Differential Decoder ON Mod Power Offset 0 dB IF Loopback OFF TX Power Level 0.0 dBm RF Loopback OFF Differential Encoder ON BER Threshold NONE Carrier Mode Normal (OFF) Demod Spectrum Normal Mod Spectrum Normal

Buffer Clock Source RX Satellite Descrambler ON TX Clock Phase Normal Buffer Size 12 ms RX Clock Phase Normal Service Channel T X 1 -5 dBm Ext-Ref Freq. 5000.000 kHz Service Channel TX2 -5 dBm B-Band Loopback OFF Service Channel RX1 -5 dBm Intrfc Loopback OFF Service Channel RX2 -5 dBm TX Coding Format AMI Loop Timing OFF RX Coding Format AMI TX Overhead Type NONE TX 2047 Pattern OFF RX Overhead Ty pe NONE RX 2047 Pattern OFF TX Data Phase Normal TX Data Fault NONE RX Data Phase Normal RX Data Fault NONE IDR B/W Alarm Control ON Descrambler Type IDR Scrambler ON Scrambler Type IDR Scrambler Defaults ON

Operation Mode Duplex Remote Address (See Note) 1 Baud Rate (See Note) 9600 Time 12:00 AM Parity (See Note) EVEN Date 11/21/94 Ext AGC: Min Pwr

(

See Note

(See Note)

)

TX Rate A Data Rate

Interface Defaults

System Defaults

10.0V Ext AGC: Max Pwr 0.0V

(See Note)

RX Rate A

Note:

All code rate/data rate information is read from the modulator/demodulator filter boards on power-up. If a board is missing or the filters were not installed per order, “N/A” (Not Applicable) will be displayed on the front panel.

3–16 Rev. 4

This chapter includes operational information for the front panel and the menu system.

4.1 Front Panel

The modem front panel (Figure 4-1) enables the user to control modem configuration parameters and display the modem status.

Chapter 4.

OPERATION

Figure 4-1. SDM-9000 Front Panel View

The major front panel features are:

• 32-character, 2-line LCD display

• 6-button keypad for providing sophisticated functions

• 10 LEDs to provide overall status at a glance

Rev. 4 4–1

Operation SDM-9000 Satellite Modem

All functions are accessible at the front panel by entering one of five pre-defined Function Select categories or levels:

• Configuration

• Monitor

• Faults/Alarms

• Stored Faults/Alarms

• Utility

4.1.1 LED Indicators

General modem summary fault information, status, and alarms are indicated by the 10 LEDs on the front panel. The LEDs, when lit, indicate the following information:

LED Color Description

Faults

TX Red A fault condition exists in the T X chain. RX Red A fault condition exists in the RX chain. Common Red A common equipment fault condition exists. Stored Yellow A fault has been logged and stored. The fault may be active.

Status

Power ON Green Power is applied to the modem. TX ON Green TX is currently on. This indicator reflects the actual condition of

the TX, as opposed to the programmed condition. Carrier Detect Green Decoder is locked. Test Mode Yellow Flashes when the modem is in a test configuration. The test

mode status can be identified in the Utility System menu in

Figure 4-14.

Alarms

TX Yellow A TX function is in an alarm condition. RX Yellow AN RX function is in an alarm condition.

4–2 Rev. 4

SDM-9000 Satellite Modem Operation

4.1.2 Front Panel Controls

The modem is locally operated by using the front panel keypad (Figure 4-1). The keypad consists of six keys. Each key provides one or more logical functions:

Key Function

[ENTER] [ENTER] is used to select a displayed function or to ex ecute a modem

configuration change.

[CLEAR] [CLEAR] is used to back out of a selection or to cancel a configuration change

which has not been executed using [ENTER]. Pressing [CLEAR ] generally returns the display to the previous selection.

[←] and [→] [↑] and [↓]

The modem responds by beeping whenever a key is pressed:

• A single beep indicates a valid entry and the appropriate action was taken.

• A double beep indicates an invalid entry or a parameter is not available.

These keys are used to move to the next selection or to move the cursor for certain functions. These keys are used primarily to change configuration data (numbers), but are also used at times to move from one section to another.

The modem front panel control uses a tree-structured menu system (Figures 4-2 through 4-16) to access and execute all functions. The base level of this structure is the sign-on message that is displayed on the front panel when the modem power is turned on:

• Line 1 of the sign-on message is the modem model number (SDM-9000).

• Line 2 is the version number of the firmware implemented in the modem.

The main level of the menu system is Function Select. This may be accessed from the base level by pressing any of the arrow keys. From the Function Select menu, the user may select any one of five functional categories:

Note:

The user should proceed to the Utility menu and establish the identity of the

modem before proceeding with the Configuration menu.

• Configuration

• Monitor

• Faults/Alarms

• Stored Faults/Alarms

• Utility

Press [

←] or [→] to move from one selection to another. When the desired function is

displayed on line 2, select that level by pressing [ENTER]. After entering the appropriate functional level, move to the desired function by pressing [

←] or [→]. Refer to the

following section for information on individual functional categories and their functions.

Rev. 4 4–3

Operation SDM-9000 Satellite Modem

4.2 Menu System

SDM-9000 "TYPE"

VER: 6.1.1

FUNCTION SELECT

CONFIGURATION

MODULATOR

(Figure 4-3)

CONFIGURATION

DEMODULATOR

(Figure 4-4)

CONFIGURATION

INTERFACE

(Figure 4-5)

CONFIGURATION

SAVE

(Figure 4-6)

CONFIGURATION

RECALL

(Figure 4-7)

FUNCTION SELECT

MONITOR

MONITOR RAW BER

(Figure 4-8)

MONITOR

CORRECTED BER

(Figure 4-8)

MONITOR

EB/N0

(Figure 4-8)

MONITOR

RECEIVE SIGNAL

(Figure 4-8)

MONITOR

SWEEP

FREQUENCY

(Figure 4-8)

MONITOR

BUFFER FILL

(Figure 4-8)

FUNCTION SELECT

FAULTS/ALARMS

MODULATOR

(Figure 4-9)

FAULTS/ALARMS

DEMODULATOR

(Figure 4-9)

FAULTS/ALARMS

TX INTERFACE

(Figure 4-9)

FAULTS/ALARMS

RX INTERFACE

(Figure 4-9)

FAULTS/ALARMS

COMMON

(Figure 4-9)

FAULTS/ALARMS

BACKWARD ALARMS

(Figure 4-9)

FUNCTION SELECT

STORED

FAULTS/ALARMS

STORED

FAULTS/ALARMS

MODULATOR

(Figure 4-10)

STORED

FAULTS/ALARMS

DEMODULATOR

(Figure 4-10)

STORED

FAULTS/ALARMS

TX INTERFACE

(Figure 4-10)

STORED

FAULTS/ALARMS

RX INTERFACE

(Figure 4-10)

STORED

FAULTS/ALARMS

COMMON

(Figure 4-10)

STORED

FAULTS/ALARMS

BACKWARD ALARMS

(Figure 4-10)

FUNCTION SELECT

UTILITY

MODULATOR

(Figure 4-11)

UTILITY

DEMODULATOR

(Figure 4-12)

UTILITY INTERFACE (Figure 4-13)

UTILITY

SYSTEM

(Figure 4-14)

UTILITY

MODEM TYPE

(Figure 4-15)

UTILITY

FACTORY SETUP

(Figure 4-16)

Key:

ACCESS TO

SUBMENU

MONITOR

FRAME ERRORS

(Figure 4-8)

CONDITIONAL OR

OPTION-DEPENDENT

Parameter Information

STORED

FAULTS/ALARMS

UNAVAL SECONDS

(Figure 4-10)

STORED

FAULTS/ALARMS

CLEAR???

(Figure 4-10)

Figure 4-2. Main Menu

4–4 Rev. 4

SDM-9000 Satellite Modem Operation

4.2.1 Configuration

Refer to the menu trees (Figures 4-3 through 4-7) for configuration changes. Modem configuration may be viewed or changed by entering the Configuration level from the Function Select menu on the front panel. Once in the Configuration menu, press [ [

→] to select one of the following configurations:

• Modulator

• Demodulator

• Interface

• Save

• Recall

] or

←

Enter the selected configuration menu by pressing [ENTER]. Press [

] or [→] to view the

←

selected configuration parameters. If a configuration parameter change is required, press [ENTER] to begin the change process.

Press the arrow keys to change the parameters. After the display represents the correct parameters, execute the change by pressing [ENTER]. This action initiates the necessary programming by the modem.

To cancel a parameter prior to executing the change, simply press [CLEAR].

Notes:

1. Hardware configuration may change the front panel menu selection (all front panel configuration windows are listed in the following paragraphs).

2. If a particular window is specific to a certain modem configuration, the user will not be able to enter that window unless that configuration is selected. This eliminates incompatible parameters from accidentally being set in the different modes of operation.

Rev. 4 4–5

Operation SDM-9000 Satellite Modem

SDM-9000 "TYPE"

VER: 6.1.1

TX-X CODE_RATE TX-IF FREQUENCY TX-IF OUTPUT TX POWER LEVEL

x = FILTER A, B, C, or D See table below for code rate

and data rate range.

DIFF. ENCODER

OFF

Code Rate G.703 ECL/PECL MIL-STD-188

QPSK 1/2 8.448, 32.064, 34.368 6.000 to 37.000 All code rates: QPSK 3/4 All other All other 6.000 to 13.000

QPSK 7/8 code rates: code rates: 8PSK 2/3 32.064, 34.368 6.000 to 51.840 8PSK 5/6 44.736, 51.840 16QAM 3/4 16QAM 7/8

(Mbit/s) (Mbit/s) (Mbit/s)

FUNCTION SELECT

CONFIGURATION

70.000 MHz

50 to 180 MHz

in 2.5 kHz steps.

CARRIER MODE

(TEST MODE

CONFIGURATION)

NORMAL (OFF)

CENTER

OFFSET

DUAL

CONFIGURATION

MODULATOR

MODULATOR REF

INTERNAL

EXT 5 MHz EXT 10 MHz EXT 20 MHz

Modulator high stability

reference option only.

Key:

OFF

ACCESS TO

SUBMENU

+5 to -20 dBm (no offset) or

-5.0 to -30.0 dBm

fixed user, total range)

RS ENCODER

Reed-Solomon option only.

OFF

CONDITIONAL OR

OPTION-DEPENDENT

(offset,

Parameter Information

Figure 4-3. Configuration Modulator Menu

4–6 Rev. 4

SDM-9000 Satellite Modem Operation

4.2.1.1 Configuration Modulator

TX-X CODE_R AT E TX Rate Selection. Under the Utility menu, select one of four

(A, B, C, or D) pre-defined TX code/data rate combinations. On entry, the current TX rate is displayed on line 1. The data

rate is displayed on line 2. Press [←] or [→] to select one of four pre-defined rates (A, B, C, or D).

Note:

When the TX rate has been programmed, the TX is automatically turned off to prevent swamping of other channels. To turn on the TX, use the IF Output function.

TX-IF FREQUENCY Programs the modulator TX frequency between 50 and

180 MHz, in 2.5 kHz steps. On entry, the current TX frequency is displayed. Press [←] or

[→] to move the flashing cursor, and [↑] or [↓] to increment or decrement the digit at the flashing cursor. Press [ENTER] to execute the change.

Note:

When the TX frequency is changed, the TX is automatically turned off to prevent the possible swamping of other channels. To turn the TX on, use the IF Output function.

TX-IF OUTPUT Programs the modulator output on or off.

On entry, the current status of the output is displayed. Press [←] or [→] to select ON or OFF. Press [ENTER] to execute the change.

TX POWER LEVEL Programs the following modulator output power levels:

• +5 to -20 dBm, in 0.1 dBm steps (no offset)

• -5.0 to -30.0 dBm (offset)

An offset can be added through the Utility menu to remove loses or gains in the system.

On entry, the current TX power lev el is display ed. Press [↑] or [↓] to increase or decrease the output power level, in 0.1 dBm steps. Press [ENTER] to execute the change.

Note:

The actual front panel display may be changed in the power offset utility function. Using this function does not change the actual output power level.

DIFF. ENCODER Programs the differential encoder on or off.

On entry, the current status of the differential encoder is displayed. Press [←] or [→] to select ON or OFF. Press [ENTER] to execute the change.

Rev. 4 4–7

Operation SDM-9000 Satellite Modem

CARRIER MODE (Test Mode Configuration Option)

Programs the modem for continuous wave mode. Four modes of operation are available:

• Normal (OFF)

• Center

• Offset

• Dual

Normal (OFF) Mode:

The Carrier mode is normally in the OFF position. To ex ecute any of the Carrier continuous wave modes, the user must enter the Carrier mode and select the test mode of choice.

Center Mode:

Generates a carrier at the current modulator frequency. This can be used to measure the output frequency.

Offset Mode:

Generates a single upper sideband suppressed carrier signal. The upper sideband is at one-quarter of the symbol rate from the carrier. This is used to check the quadrature.

Dual Mode:

Generates a dual side-band suppressed carrier signal. Sidebands are at one-half of the symbol rate from the carrier. This is used to check the channel balance and carrier null.

On entry, the Center mode is displayed. To activate this test mode, press [ENTER]. Press [←] or [→] to select the Dual or Offset modes.

To return to the Configuration menu, press [CLEAR].

Note:

When [CLEAR] is pressed, the modem is configured to the state before CW mode was invoked. The TX is automatically turned off to prevent the possible swamping of other channels. To turn the TX on, use the IF Output function.

MODULATOR R EF Optional program for selecting the high stability 5 MHz internal

reference and the 5, 10, and 20 MHz external references. On entry, the Internal mode is displayed. Press [↑] or [↓] to

select external 5 MHz, external 10 MHz, or ex ternal 20 MHz references. Press [ENTER] to execute the change.

RS ENCODER Programs the Reed-Solomon encoder on or off.

On entry, the current status of the Reed-Solomon encoder is displayed. Press [←] or [→] to select ON or OFF. Press [ENTER] to execute the change.

Note:

Programming the Reed-Solomon encoder automatically turns off the RF TX (because of symbol rate changes).

4–8 Rev. 4

SDM-9000 Satellite Modem Operation

This page is intentionally left blank.

Rev. 4 4–9

Operation SDM-9000 Satellite Modem

SDM-9000 "TYPE"

VER: 6.1.1

RX-X CODE_RATE RX-IF FREQUENCY DIFF. DECODER RF LOOP BACK

x = FILTER A, B, C, or D See table below for code rate

and data rate range.

IF LOOP BACK BER THRESHOLD

OFF

(TEST MODE CONFIGURATION)

Code Rate G.703 ECL/PECL MIL-STD-188

QPSK 1/2 8.448, 32.064, 34.368 6.000 to 37.000 All code rates: QPSK 3/4 All other All other 6.000 to 13.000

QPSK 7/8 code rates: code rates: 8PSK 2/3 32.064, 34.368 6.000 to 51.840 8PSK 5/6 44.736, 51.840 16QAM 3/4 16QAM 7/8

(Mbit/s) (Mbit/s) (Mbit/s)

FUNCTION SELECT

CONFIGURATION

70.000 MHz

50 to 180 MHz

in 2.5 kHz steps.

1.0 E-3 to 1.0 E-8 NONE

CONFIGURATION

DEMODULATOR

SWEEP RANGE

0 to 120,000 Hz

Key:

OFF

ACCESS TO

SUBMENU

(TEST MODE CONFIGURATION

RS DECODER

CORRECTION_OFF

Reed-Solomon option only.

CONDITIONAL OR

OPTION-DEPENDENT

OFF

Parameter Information

)

Figure 4-4. Configuration Demodulator Menu

4–10 Rev. 4

SDM-9000 Satellite Modem Operation

4.2.1.2 Configuration Demodulator

RX X CODE_RAT E RX rate selection. Select one of four (A, B, C, or D) pre-defined

RX decoder/data rate combinations. On entry, the current RX rate is displayed on line 1. The data

rate is displayed on line 2. Press [←] or [→] to select one of four pre-defined rates (A, B, C, or D).

RX-IF FREQUENCY Programs the demodulator RX frequency between 50 and 180

MHz, in 2.5 kHz steps. On entry, the current RX frequency is displayed w ith the

flashing cursor on the first character. Press [←] or [→] to move the flashing cursor. Press [↑] or [↓] to increment or decrement the digit at the flashing cursor. Press [ENTER] to execute the change.

DIFF. DECODER Programs the differential decoder on or off.

On entry, the current status of the differential decoder is displayed. Press [←] or [→] to select ON or OFF. Press

[ENTER] to execute the change. RF LOOP BACK (Test Mode Configuration Option)

Programs the modem for RF loopback operation. When RF

loopback is turned on, the demodulator is programmed to the

same frequency as the modulator. When RF loopback is

turned off, the demodulator is tuned to the previous frequency.

Refer to Figure 4-17 for a block diagram of RF loopback

operation.

IF LOOP BACK (Test Mode Configuration Option)

Note:

RF loopback nullifies IF loopback.

On entry, the current status of the RF loopback is displayed.

Press [←] or [→] to select ON or OFF. Press [ENT ER] to

execute the change.

Programs the modem for IF loopback operation. When IF

loopback is turned on, the demodulator input is connected to

the modulator output through an internal attenuator. The

demodulator is programmed to the same frequency as the

modulator. An attenuator within the modem connects the IF out

to the IF in. When IF loopback is turned off, the demodulator is

tuned to the previous frequency and is reconnected to the IF

input. Refer to Figure 4-18 for a block diagram of IF loopback

operation.

Note:

IF loopback nullifies RF loopback.

On entry, the current status of IF loopback is displayed. Press

[←] or [→] to select ON or OFF. Press [ENTER] to execute the

change.

Rev. 4 4–11

Operation SDM-9000 Satellite Modem

BER THRESHOLD This function is used to set the BER threshold. If the BER

threshold set is exceeded, an RX fault will be indicated by the

modem status indicators. BER threshold may be set from 1.0

-3

to 1.0-8, or may be disabled by specifying NONE.

On entry, the current setting of the BER threshold is displayed.

Press [↑] or [↓] to select the desired setting. Press [ENTER] to

execute the change. SWEEP RANGE Programs the overall travel of the sweep width range during

acquisition in the directed sweep mode. The sweep width may

be set from 0 to 120000 Hz. When set at 120000 Hz, the

modem is in the normal acquisition mode.

Upon entry, the current programmed setting is displayed. Press

[←] or [→] to move the flashing cursor. Press [↑] or [↓] to

increment or decrement the digit at the flashing cursor. Press

[ENTER] to execute the change. The smaller the range, the

faster the modem will lock, provided the RX carrier center

frequency is within the RX IF frequency sw eep range. RS DECODER Programs the Reed-Solomon decoder ON,

CORRECTION_OFF, or OFF.

On entry, the current status of the Reed-Solomon decoder is

displayed. Press [←] or [→] to select one of the following

modes:

• ON

• CORRECTION_OFF

• OFF

Press [ENTER] to execute the change.

OFF Mode:

The RS decoder is normally disabled (OFF position). To

execute any of the Reed-Solomon decoder modes, enter the

desired Reed-Solomon decoder and select the desired mode.

Correction OFF Mode:

This mode turns OFF the Reed-Solomon decoder data error

correction circuitry. Data flow is then routed through normal

data paths without error corrections.

ON Mode:

The ON mode enables the Reed-Solomon decoder to provide

data error corrections.

Note:

With the Reed-Solomon decoder turned ON (not OFF or CORRECTION_OFF), the corrected BER will be reported from the outer decoder (Reed-Solomon decoder).

4–12 Rev. 4

SDM-9000 Satellite Modem Operation

This page is intentionally left blank.

Rev. 4 4–13

Operation SDM-9000 Satellite Modem

SDM-9000 "TYPE"

VER: 6.1.1

TX CLOCK PHASE EXT-REF FREQ BUFFER CLOCK BUFFER SIZE

NORMAL

INVERT

ECL, PECL, or MIL-STD-188

interface only.

BUFFER CENTER RX CLOCK PHASE

YES

Only available when buffer

installed.

LOOP TIMING

ECL, PECL, or MIL-STD-188

OFF

interface only.

FUNCTION SELECT

CONFIGURATION

1544.000 to 51840.000 kHz Steps of 8 kHz or at data rate if data rate is over

20000.0 kbit/s.

NORMAL

INVERT

ECL, PECL, or MIL-STD-188

interface only.

TX CODING

FORMAT

AMI

B3ZS

HDB3 Only available when G.703 interface installed.

CONFIGURATION

INTERFACE

RX (SATELLITE)

INTERNAL CLOCK

EXT CLOCK

TX TERRESTRIAL

Only available when buffer

installed.

B-BAND LOOPBACK

OFF

RX CODING

FORMAT

AMI

B3ZS

HDB3 Only available when G.703 interface installed.

2 to 32 ms (steps of 2 ms) 0 (bypass) Only available when buffer installed.

INTERFC

LOOPBACK

OFF

SCRAMBLER

OFF

DESCRAMBLER

OFF

RX 2047 PATTERN

OFF

TX DATA FAULT

NONE

AIS

DATA

SERVICE CHANNEL

ADJUST

CHANNEL: TX-1 -5 dBm CHANNEL: TX-2 -5 dBm CHANNEL: RX-1 -5 dBm CHANNEL: RX-2 -5 dBm

Level = +10 to -20 dBm.

IDR overhead only.

RX DATA FAULT

NONE

AIS

DATA

Key:

ACCESS TO

SUBMENU

TX 2047 PATTERN

CONDITIONAL OR

OPTION-DEPENDENT

OFF

Parameter Information

Figure 4-5. Configuration Interface Menu

4–14 Rev. 4

SDM-9000 Satellite Modem Operation

4.2.1.3 Configuration Interface

TX CLOCK PHASE Programs the TX clock phase to:

• Normal

• Invert

On entry, the current setting for the TX clock phase is displayed. Press [↑] or [↓] to select Normal or Invert. Press [ENTER] to execute the change.

Note:

This menu is only available for the ECL, PECL, or

MIL-STD-188 interface.

EXT-REF FREQ Programs the external reference clock input frequency betw een

1544.000 and 51840.000 kHz, in steps of 8 kHz, or at data rate (if data rate is over 20000.0 kbit/s).

On entry, the current setting for the external reference is displayed. Press [↑] or [↓] to increment or decrement the digit at the flashing cursor. Press [ENTER] to execute the change.

BUFFER CLOCK Programs the interface buffer output clock to one of the following

modes:

• RX Satellite

• Internal Clock

• External Clock

• TX Terrestrial

RX (Satellite) Mode:

Sets the buffer output clock to the satellite clock.

Internal Clock Mode:

Sets the buffer output clock to operate from the modem internal clock. This is also the fallback clock.

External Clock Mode:

Sets the clock source to the external supplied buffer clock.

TX Terrestrial Mode:

Sets the buffer output clock to recover timing from the incoming TX data clock.

On entry, the current setting of the buffer clock is displayed. Press [←] or [→] to select Satellite, Internal, External Reference, or T X Terrestrial for the buffer clock. Press [ENTER] to execute the change.

Notes:

1. T his menu is only av ailable w hen the buffer is installed.

2. T he buffer clock source selection must fall w ithin the parameters listed in Chapter 5.

Rev. 4 4–15

Operation SDM-9000 Satellite Modem

BUFFER SIZE This configuration function is used to set the size of the buffer.

On entry, the current buffer length is displayed. Press [↑] or [↓] to select the desired buffer size. The buffer size will be displayed in ms. The user may choose from 2 to 32 ms, in increments of 2 ms, or 0 (bypass). Press [ENTER] to execute the change.

Note:

This menu is only available when the buffer is installed.

BUFFER CENTER This configuration function is used to center the buffer. Press

[ENTER] twice to center the plesiochronous buffer.

Note:

This menu is only available when the buffer is installed.

RX CLOCK PHASE Programs the RX clock phase to:

• Normal

• Invert

On entry, the current status of the RX clock is displayed. Press [←] or [→] to select Normal or Inverted. Press [ENTER] to execute the change.

Note:

This menu is only available for the ECL, PECL, or

MIL-STD-188 interface. B-BAND LOOPBACK (Test Mode Configuration Option)

Programs the modem for baseband loopback operation.

When baseband loopback is turned on, the data and timing signals

are hard-wired (via relays) from the demodulator to the modulator

on the modem side of the interface. The DTE baseband signals are

also looped back from the TX data and clock to RX data and clock

on the customer side of the interface. This is a bi-directional

loopback of the baseband data. Refer to Figure 4-19 for a block

diagram of baseband loopback operation.

On entry, the current status is displayed. Press [←] or [→] to select

ON or OFF. Press [ENTER] to execute the change.

Notes:

1. If baseband loopback is turned on, the buffer clock w ill be programmed for RX satellite.

2. When baseband loopback is turned off, the previous buffer clock selection will be programmed back.

INTERFC LOOPBACK (Test Mode Configuration Option)

LOOP TIMING Programs the send timing output reference clocking to the satellite

Programs the modem for interface loopback operation. When interface loopback is turned on, data is looped back at the modem side of the interface. This is a bi-directional loopback of the data after the baseband data has had the overhead added. Refer to Figure 4-20 for a block diagram of interface loopback operation.

On entry, the current status is displayed. Press [←] or [→] to select ON or OFF. Press [ENTER] to execute the change.

clock. Refer to Figures 4-21 and 4-22 for the interface clocking diagram.

On entry, the current status is displayed. Press [←] or [→] to select ON or OFF. Press [ENTER] to execute the change.

Note:

This menu is only available with the ECL, PECL, or

MIL-STD-188 interface.

4–16 Rev. 4

SDM-9000 Satellite Modem Operation

TX CODING FOR MAT Programs the TX for the following coding of the baseband data:

• AMI

• B3ZS

• HDB3

On entry, the current coding format is displayed. Press [←] or [→] to select the desired coding format. Press [ENTER] to execute the change.

Note:

This menu is only available when the G.703 interface is

installed.

RX CODING FORMAT Programs the RX for the following coding:

• AMI

• B3ZS

• HDB3

On entry, the current coding format is displayed. Press [←] or [→] to select the desired coding format. Press [ENTER] to execute the change.

Note:

This menu is only available when the G.703 interface is

installed.

SCRAMBLER Programs the scrambler on or off.

On entry, the current status of the scrambler is displayed. Press [←] or [→] to select ON or OFF. Press [ENTER] to execute the change.

DESCRAMBLER Programs the descrambler on or off.

On entry, the current status of the descrambler is displayed. Press [←] or [→] to select ON or OFF. Press [ENTER] to execute the change.

TX DATA FAULT TX data fault. This configuration function is used to select a T X

interface fault monitor of:

• NONE

• AIS

• DATA

None Mode:

The TX interface fault Data/AIS is not activated.

AIS Mode:

Sets TX interface fault Data/AIS to monitor a fault condition of all 1s from customer data input to the modem.

Data Fault Mode:

Sets TX interface fault Data/AIS to monitor a fault condition of all 1s or all 0s. This is referred to as a data-stable condition, which means that the data is not transitioning.

On entry, the current TX data fault that is being monitored is displayed. Press [←] or [→] to select Data, AIS, or None. Press [ENTER] to execute the change.

Rev. 4 4–17

Operation SDM-9000 Satellite Modem

RX DATA FAULT RX data fault. This configuration function is used to select an RX

interface fault monitor of:

• NONE

• AIS

• DATA

The data monitored for RX data is coming from the satellite. Refer to TX data fault for a description of the function choices.

On entry, the current RX data fault that is being monitored is displayed. Press [←] or [→] to select Data, AIS, or None. Press

[ENTER] to execute the change. TX 2047 PATTERN (Test Mode Configuration Option)

RX 2047 PATTERN (Test Mode Configuration Option)

SERVICE CHANNEL This configuration function is used to set service channel audio

Programs the TX to insert a 2047 pattern in lieu of the normal TX

data.

On entry, the current status is displayed. Press [←] or [→] to select

ON or OFF. Press [ENTER] to execute the change.

Programs the modem to RX a 2047 pattern as the normal RX data,

and allows the BER monitor to work on that 2047 pattern.

On entry, the current status is displayed. Press [←] or [→] to select

ON or OFF. Press [ENTER] to execute the change.

levels between +10.0 and -20.0 dBm.

On entry, press [←] or [→] to select the desired service channel:

• TX-1

• TX-2

• RX-1

• RX-2

To adjust the service channel level (+10.0 to -20.0 dBm), press

[ENTER]. Press [↑] or [↓] to adjust the service channel. Press

[ENTER] to execute the change.

Note:

This menu is only available when IDR has been selected for

TX or RX overhead in the Interface Utility menu.

4–18 Rev. 4

SDM-9000 Satellite Modem Operation

SDM-9000 "TYPE"

VER: 6.1.1

CONFIGURATION #X

FUNCTION SELECT

CONFIGURATION

SAVE

Key:

x = 1, 2, 3, 4, or 5

ACCESS TO

SUBMENU

CONDITIONAL OR

OPTION-DEPENDENT

Parameter Information

Figure 4-6. Configuration Save Menu

4.2.1.4 Configuration Save

This feature allows the user to program configuration parameters into memory on the M&C. There are five memory locations that may be used to store specific configuration setups that are used frequently. This feature speeds up the configuration process and allows faster configuration changes.

After setting all configuration parameters to the desired settings, enter the Configuration Save menu (Figure 4-6) and select memory location 1, 2, 3, 4, or 5. Press [ENTER] to execute the save.

Rev. 4 4–19

Operation SDM-9000 Satellite Modem

SDM-9000 "TYPE"

VER: 6.1.1

CONFIGURATION #X

FUNCTION SELECT

CONFIGURATION

RECALL

Key:

x = 1, 2, 3, 4, or 5

ACCESS TO

SUBMENU

CONDITIONAL OR

OPTION-DEPENDENT

Parameter Information

Figure 4-7. Configuration Recall Menu

4.2.1.5 Configuration Recall

Once a configuration setup has been saved, it may be recalled by entering Configuration Recall. On entry, select the appropriate memory location (1, 2, 3, 4, or 5) by pressing [ or [

]. Press [ENTER] to execute the Recall. The modem will now be reconfigured to

→

the setting that was in that memory location.

]

←

4–20 Rev. 4

SDM-9000 Satellite Modem Operation

SDM-9000 "TYPE"

VER: 6.1.1

RAW BER

2.4 E-3

CURRENT RAW BER Low limit: based on performance. High Limit: based on data/code rate.

NO DATA (if carrier not locked).

SWEEP FREQUENCY BUFFER FILL

CURRENT SWEEP

FREQUENCY

(-60,000 to +60,000 Hz).

FUNCTION SELECT

MONITOR

CORRECTED BER

CURRENT CORRECTED BER Low limit: based on performance. High limit: 1.0 E-12.

NO DATA (if carrier not locked).

CURRENT BUFFER FILL STATUS (1 to 99%) or NO DATA (if carrier not locked). Only available when buffer installed.

4.0 E-3

EB/N0

CURRENT Eb/N0 Low limit: based on data rate. High limit: 16.0 dB.

NO DATA (if carrier not locked).

CURRENT FRAME/2047 BER Low limit: based on performance, High limit: based on data/code rate, or NO DATA (if carrier not locked), or SAMPLING (if collecting data).

RECEIVE SIGNAL

-45 dBm

CURRENT RECEIVE

LEVEL

(-25 to -50 dBm)

FRAME ERRORS

Key:

ACCESS TO

SUBMENU

CONDITIONAL OR

OPTION-DEPENDENT

Figure 4-8. Monitor Menu

Parameter Information

Rev. 4 4–21

Operation SDM-9000 Satellite Modem

4.2.2 Monitor

When the Monitor level is entered, press [←] or [→] to select the desired monitor function. Each monitor function is displayed in real time as long as it is selected.

RAW BER Displays the current BER or No Data (if carrier is not locked).

Range: <m.m

Note:

Low limit based on performance. High limit based on

-e

to >m.m-e.

data/code rate. CORRECTED BER Displays the current corrected BER or No Data (if carrier is not

locked).

-e

to >m.m-e.

-12

Eb/N

Range: <m.m

Note:

Low limit based on performance. High limit is 1.0

Displays the current Eb/N0 or No Data (if carrier is not locked).

Range: <mm.m to >mm.m.

Note:

Low limit based on performance. High limit is 16.0 dB.

RX SIGNAL Displays the current RX signal level.

Range: -mm dBm (-25 to -50 dBm). SWEEP FREQUENCY Displays the current sweep frequency.

Range: -60,000 to +60,000 Hz. BUFFER FILL Displays the current plesiochronous buffer fill status percent, or No

Data (if carrier not locked).

Range: nn% (1% to 99%).

Note:

This menu is only available when buffer installed.

FRAME ERRORS Displays the following information:

• Current framing pattern BER.

• “No Data” (if carrier is not locked).

• “Sampling” if collecting data.

-e

Range: <mm.m

Note:

Low limit based on performance. High limit based on

to >mm.m-e.

data/code rate.

4–22 Rev. 4

SDM-9000 Satellite Modem Operation

SDM-9000 "TYPE"

VER: 6.1.1

MODULATOR DEMODULATOR TX INTERFACE RX INTERFACE

IF SYNTHESIZER DATA CLOCK ACT DATA CLOCK SYN

I CHANNEL Q CHANNEL AGC LEVEL

INTERNAL SCT SYN

EXT REF ACT

MODULE

PROGRAMMING

CONFIGURATION

See notes.

COMMON BACKWARD ALARMS

BATTERY/CLOCK

-12 VOLT SUPPLY

+12 VOLT SUPPLY

+5 VOLT SUPPLY

-5 VOLT SUPPLY CONTROLLER

INTERFACE MODULE

See notes.

FUNCTION SELECT

FAULTS/ALARMS

CARRIER DETECT

IF SYNTHESIZER

RX CLOCK SYN

I CHANNEL

Q CHANNEL

DESCRAMBLER

BER THRESHOLD

MODULE

PROGRAMMING

CONFIGURATION

See notes.

BW ALARM RX #4 BW ALARM RX #3 BW ALARM RX #2 BW ALARM RX #1 BW ALARM TX #4 BW ALARM TX #3 BW ALARM TX #2 BW ALARM TX #1

See notes.

IDR overhead only.

TX CLK ACTIVITY

PROGRAMMING

CONFIGURATION

Key:

ACCESS TO

SUBMENU

TX DATA/AIS

TX CLK PLL

See notes.

Notes:

1. A "-" indicates that no fault or alarm exists.

2. A "+" indicates that a fault exists, and will cause switching in a redundant system.

3. A reversed contrast "+" indicates an active alarm.

CONDITIONAL OR

OPTION-DEPENDENT

BUFFER UNDERFLOW

BUFFER OVERFLOW

RX DATA/AIS

FRAME BER

BUFFER CLK PLL

BUFFER CLK ACT

DEMUX LOCK

RX 2047 LOCK

BUFFER FULL

PROGRAMMING

CONFIGURATION

See notes.

Parameter Information

Figure 4-9. Faults/Alarms Menu

Rev. 4 4–23

Operation SDM-9000 Satellite Modem

4.2.3 Faults/Alarms

The Faults/Alarms level is accessible from the Function Select menu. Faults/Alarms are similar to Monitor functions, as they display the current fault status of the group being displayed. Press [

• Modulator

• Demodulator

• TX Interface

• RX Interface

• Common

• Backward Alarms (IDR overhead only)

The current Faults/Alarms status is displayed on line 2 of the display in real time.

For each parameter monitored, fault status is displayed as follows:

] or [→] to move between the following Fault/Alarm groups:

←

• “-” indicates that no fault or alarm exists.

• “+” indicates that a fault exists, and will cause switching in a redundant system.

• A reversed-contrast “+” indicates an alarm is active. Alarms do not cause

switching to occur.

To display labels for individual faults or alarms, press [ENTER]. Press [

] or [→] to

←

move the flashing cursor to identify the fault or alarm. The label for that Fault/Alarm is then displayed on line 1.

Press [CLEAR] to exit this level of operation and return to the previous level.

The following sections outline the faults and alarms monitored and displayed in each group. Refer to the fault isolation section in Chapter 6 for more details on the causes of each fault.

4–24 Rev. 4

SDM-9000 Satellite Modem Operation

4.2.3.1 Modulator Faults

IF SYNTHESIZER Modulator IF synthesizer fault. DATA CLOCK ACT T X data clock activity alarm.

Indicates that data clock activity was not detected.

DATA CLOCK SYN TX clock synthesizer fault.

Indicates the internal VCO has not locked to the incoming data clock. I CHANNEL I channel data activity fault. Q CHANNEL Q channel data activity fault. AGC LEVEL TX IF AGC lev el fault. INTERNAL SCT SY N Internal TX data clock synthesizer fault. EXT REF ACT Modulator fault.

This is only used with the External Reference H igh Stability option.

Indicates modulator does not have an external reference. MODULE Modulator module fault.

Typically indicates that the modulator module is missing or will not

program. PROGRAMMIN G Modulator programming fault. CONFIGURATION Modulator configuration fault.

Indicates the modulator cannot execute a programmed configuration

parameter.

Rev. 4 4–25

Operation SDM-9000 Satellite Modem

4.2.3.2 Demodulator Faults

CARRIER DETECT Carrier detect fault.

Indicates the decoder is not locked.

IF SYNTHESIZER Demodulator IF synthesizer fault.

Indicates the IF synthesizer is not locked.

RX CLOCK SYN RX data clock synthesiz er fault.

Indicates a loss of lock on the reference of the demodulator clock recovery oscillator.

I CHANNEL I channel activity fault.

Indicates a loss of activity in the I channel of the quadrature demodulator.

Q CHANNEL Q channel activity fault.

Indicates a loss of activity in the Q channel of the quadrature demodulator.

DESCRAMBLER Descrambler activity alarm.

Indicates a loss of activity in the descrambler. BER THRESHOLD BER threshold set in the Configuration Demod menu. MODULE Demodulator/decoder module fault.

Typically indicates that the Demod/decoder module is missing or will

not program. PROGRAMMIN G Demodulator programming fault. CONFIGURATION Demodulator configuration fault.

Indicates the demodulator cannot execute a programmed

configuration parameter.

4–26 Rev. 4

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

1.3 Modem Specifications

1.4 BER Performance Specifications

1.4.1 Viterbi Decoder BER (QPSK)

2.1 Unpacking

2.2 System Options

2.3 System Installation

2.4 External Connectors

2.4.1 TX/IF Output (CP1)

2.4.2 RX/IF Input (CP2)

2.4.3 Receive Data (CP3)

2.4.4 Send Data (CP4)

2.4.5 External Clock (CP5)

2.4.6 Remote (J6)

2.4.7 Fault (J7)

2.4.8 DATA I/O (ESC) Interface (J8)

2.4.9 AUX 1 (J9)

2.4.10 Alarms (J10)

2.4.11 AC Power

2.4.12 DC Power

2.4.13 Ground (GND)

3.1 Display/M&C

3.2 Modulator

3.3 Demodulator

3.4 Interface

3.5 Nyquist Filter Configuration

3.5.1 Compatibility

3.5.2 Installation

3.6 Software Configuration

3.6.1 Revision Emulation

3.6.2 Remote Interface Specification

3.6.3 Modem Defaults

4.1 Front Panel

4.1.1 LED Indicators

4.1.2 Front Panel Controls

4.2 Menu System

4.2.1 Configuration

4.2.2 Monitor

4.2.3 Faults/Alarms