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Comtech EF Data SNM-1001L Operating instructions

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Part Number MN/SNM1001L.IOM Revision 1
SNM-1001L
Satellite Modem
Installation and Operation Manual
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Errata A
Comtech EF Data Documentation Update
Subject:
Changes to power consumption and fusing information
Date:
May 30, 2003
Document:
SNM-1001L Satellite Modem Installation and Operation Manual,
Rev. 1, dated March 17, 2003
Part Number:
MN/SNM1001L.EA1
Collating Instructions:
Attach this page to page xii
Comments:
The following changes provide updated information for page xii and Section 3.2.9. This
information will be incorporated into the next revision.
Change Specifics:
ELECTRICAL SAFETY
The SNM-1001L Satellite Modem has been shown to comply with the following safety standard:
• EN 60950: Safety of Information Technology Equipment, including electrical business
machines.
The equipment is rated for operation over the range 85 to 264 volts AC. It has a maximum
power consumption of 55 watts without BUC power supply. Input power increases to 175W
with 100W, 24V BUC power supply at maximum load. Input power increases to 230W with
150W, 48V BUC power supply at maximum load.
FUSES
The SNM-1001L Satellite Modem is fitted with two fuses, one each for line and neutral
connections. These are contained within the body of the IEC power connector, behind a small
plastic flap.
• Use T3.15A, 20mm fuses.
IMPORTANT
For continued operator safety, always replace the fuses with the
correct type and rating.
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3.2.9 AC Power Connector
A standard, detachable, non-locking, 3-prong power cord (IEC plug) supplies the
Alternating Current (AC) power to the modem. Observe the following:
Input Power
55W maximum, 40W typical
without BUC power supply.
Input Voltage
90 to 132 or 175 to 264 VAC
Unit switches ranges automatically
Connector Type
I.E.C
Fuse Protection
T3.15A 20 mm type fuses
Line and neutral fusing
Copyright © Comtech EF Data, 2000, 2001, 2002. All rights
reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe,
Arizona 85281 USA, 480.333.2200 FAX: 480.333.2161
SNM-1001L
Satellite Modem
Installation and Operation Manual
Part Number MN/SNM1001A.IOM
Revision 1
March 17, 2003
Comtech EF Data is an ISO 9001
Registered Company.
MULTIMEDIA INTEGRATED DIGITAL ACCESS SYSTEM
i
Customer Support
Contact the Comtech EF Data 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 EF Data
Attention: Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA
480.333.2200 (Main Comtech EF Data Number)
480.333.4357 (Customer Support Desk)
480.333.2161 FAX
or, E-Mail can be sent to the Customer Support Department at:
[email protected]
Contact us via the web at www.comtechefdata.com
.
To return a Comtech EF Data product (in-warranty and out-of-warranty) for repair or
replacement:
1. Request a Return Material Authorization (RMA) number from the Comtech EF
Data Customer Support Department.
Be prepared to supply the Customer Support representative with the model
number, serial number, and a description of the problem.
2. To ensure that the product is not damaged during shipping, pack the product in
its original shipping carton/packaging.
3. Ship the product back to Comtech EF Data. (Shipping charges should be
prepaid.)
For more information regarding the warranty policies, see p.xviii.
ii
Table of Contents
Customer Support........................................................................................................................................i
About this Manual ...................................................................................................................................xiii
Electrical Safety ........................................................................................................................................ xv
Telecommunications Terminal Equipment Directive...........................................................................xvi
EMC (Electromagnetic Compatibility).................................................................................................xvii
Warranty Policy .....................................................................................................................................xviii
CHAPTER 1. INTRODUCTION .............................................................................................1–1
1.1 Overview ...................................................................................................................................... 1–1
1.2 Options Summary ....................................................................................................................... 1–2
1.3 Comtech EF Data Part Numbers............................................................................................... 1–3
1.4 FAST Accessible Options ........................................................................................................... 1–4
1.5 Compatibility............................................................................................................................... 1–5
1.6 Description of the Modulator..................................................................................................... 1–5
1.6.1 Overview............................................................................................................................... 1–5
1.6.2 Functional Description.......................................................................................................... 1–5
1.6.3 Description of Modulation Types .........................................................................................1–6
1.7 Description of the Demodulator................................................................................................. 1–9
1.7.1 Overview............................................................................................................................... 1–9
1.7.2 Functional Description........................................................................................................ 1–10
1.8 Description of Monitor & Control........................................................................................... 1–11
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1.8.1 Overview............................................................................................................................. 1–11
1.8.2 Functional Description........................................................................................................ 1–12
1.9 Dimensional Envelope .............................................................................................................. 1–14
1.10 New in this Release.................................................................................................................... 1–15
CHAPTER 2. INSTALLATION/ UPGRADES ........................................................................2–1
2.1 Unpacking.................................................................................................................................... 2–1
2.2 Installation ................................................................................................................................... 2–2
2.2.1 Modem Installation (Optional).............................................................................................. 2–2
2.3 Software and Hardware Installation/Upgrades ....................................................................... 2–4
2.3.1 Reed-Solomon PCB .............................................................................................................. 2–4
2.3.2 Turbo Codec Installation....................................................................................................... 2–6
2.4 Data I/O Interface Connector (J8) Removal/Installation........................................................ 2–8
2.5 Hardware Upgrades.................................................................................................................... 2–9
2.5.1 Main PCB Firmware Chips...................................................................................................2–9
2.6 Flash Upgrading........................................................................................................................ 2–11
2.6.1 Downloading Flash Updates from the Web ........................................................................ 2–12
CHAPTER 3. CONNECTOR PINOUTS.................................................................................3–1
3.1 Connector Overview ................................................................................................................... 3–1
3.2 Connector Description................................................................................................................ 3–3
3.2.1 Remote Connector and Pinouts (J6)...................................................................................... 3–3
3.2.2 Fault Connector and Pinouts (J7).......................................................................................... 3–4
3.2.3 Data I/O Interface Connector (J8).........................................................................................3–5
3.2.4 Auxiliary 1 Connector and Pinouts (J9)................................................................................ 3–9
3.2.5 Alarms Connector and Pinouts (J10) ..................................................................................3–10
3.2.6 RF Output Connector (CP1) ............................................................................................... 3–10
3.2.7 External Reference (CP2) ................................................................................................... 3–10
3.2.8 RF Input Connector (CP3) .................................................................................................. 3–10
3.2.9 AC Power Connector .......................................................................................................... 3–11
3.2.10 Ground Connector (GND) ..................................................................................................3–11
CHAPTER 4. FRONT PANEL OPERATION.........................................................................4–1
4.1 Front Panel .................................................................................................................................. 4–1
4.1.1 LED Indicators The 10 LEDs on the front panel indicate: • General modem summary faults
• Status • Alarms The indicators are defined in Table 4-1 as follows:............................................4–2
4.1.2 Front Panel Keypad............................................................................................................... 4–3
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4.2 Menu System ............................................................................................................................... 4–4
4.2.1 Revision Emulation...............................................................................................................4–5
4.2.2 Menu Tree.............................................................................................................................4–6
4.3 OPENING SCREEN...................................................................................................................4–7
4.3.1 FUNCTION SELECT: CONFIGURATION........................................................................ 4–7
4.3.2 FUNCTION SELECT: MONITOR .................................................................................... 4–39
4.3.3 FUNCTION SELECT: FAULTS/ALARMS...................................................................... 4–46
4.3.4 FUNCTION SELECT: STORED FLTS/ALMS................................................................. 4–50
4.3.5 FUNCTION SELECT: REMOTE AUPC (CONDITIONAL)......................................... 4–55
4.3.6 FUNCTION SELECT: UTILITY.......................................................................................4–58
FUNCTION SELECT:UTILITY: DEMODULATOR: RX TERMINAL LO ................................... 4–70
FUNCTION SELECT: UTILITY: INTERFACE: BUFFER PROGRAM ..................................... 4–76
FUNCTION SELECT: UTILITY: OUTDOOR UNIT: ODU FSK ADDRESS (CONDITIONAL) .4–
78
4.4 Custom Modem Defaults .......................................................................................................... 4–97
CHAPTER 5. MODEM TYPE...............................................................................................5–1
5.1 Modem Type................................................................................................................................ 5–1
5.1.1 AUPC Operation (with Reed-Solomon) ...............................................................................5–2
5.1.2 Closed Network Operation (Comtech EF Data) ................................................................... 5–2
5.2 Custom Operation....................................................................................................................... 5–3
5.3 Reed-Solomon Modes ................................................................................................................. 5–4
CHAPTER 6. CLOCKING AND RX BUFFERING SETTINGS.............................................6–1
6.1 Clocking Options......................................................................................................................... 6–1
6.1.1 EIA-232, EIA-422, or V.35 Master/Master .......................................................................... 6–1
6.1.2 EIA-232, EIA-422, or V.35 Master/Slave ............................................................................ 6–1
6.2 Buffering ...................................................................................................................................... 6–2
6.2.1 Buffer Size ............................................................................................................................6–2
6.3 Doppler......................................................................................................................................... 6–7
6.4 Plesiochronous............................................................................................................................. 6–8
6.5 Frame/Multiframe Length ......................................................................................................... 6–9
6.5.1 Multiples of the Frame Length.............................................................................................. 6–9
6.5.2 Total Buffer Length .............................................................................................................. 6–9
6.5.3 Converting Between Bits and Seconds ................................................................................. 6–9
CHAPTER 7. FORWARD ERROR CORRECTION (FEC) ....................................................7–1
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7.1 Introduction................................................................................................................................. 7–1
7.2 Coding .......................................................................................................................................... 7–2
7.3 Turbo Product Codec (Hardware Option) ............................................................................... 7–2
7.3.1 Introduction........................................................................................................................... 7–2
7.3.2 Mod/Demod Processing Delay ............................................................................................. 7–3
7.3.3 Comparison of all TPC Modes.............................................................................................. 7–4
7.4 Uncoded Operation (No FEC) ...................................................................................................7–5
CHAPTER 8. SYSTEM CHECKOUT.....................................................................................8–1
8.1 System Checkout......................................................................................................................... 8–1
8.1.1 Interface Checkout ................................................................................................................ 8–2
8.1.2 Modulator Checkout ............................................................................................................. 8–3
8.1.3 Demodulator Checkout ........................................................................................................... 8–5
CHAPTER 9. FAULT ISOLATION ........................................................................................9–1
9.1 Fault Isolation.............................................................................................................................. 9–1
9.1.1 System Faults/Alarms ........................................................................................................... 9–2
9.1.2 Faults/Alarms Display........................................................................................................... 9–2
9.1.3 Faults/Alarms Analysis......................................................................................................... 9–2
CHAPTER 10. AUTOMATIC UPLINK POWER CONTROL.................................................10–1
10.1 AUPC ......................................................................................................................................... 10–1
10.2 Modes of AUPC Location......................................................................................................... 10–3
10.2.1 AUPC – Between Two Modems......................................................................................... 10–4
10.2.2 Self-Monitoring Local Modem AUPC Control ..................................................................10–5
10.2.3 MUX Operation ..................................................................................................................10–6
10.2.4 DEMUX Operation............................................................................................................. 10–6
10.2.5 Buffer Operation ................................................................................................................. 10–6
10.2.6 Loop Timing Operation ...................................................................................................... 10–7
10.2.7 Baseband Loopback Operation ........................................................................................... 10–7
10.2.8 Front Panel Operation ......................................................................................................... 10–7
CHAPTER 11. ASYMMETRICAL LOOP TIMING .................................................................11–1
11.1 Asymmetrical Loop Timing ..................................................................................................... 11–1
CHAPTER 12. FULLY ACCESIBLE SYSTEM TOPOLOGY (FAST)...................................12–1
12.1 FAST System Theory................................................................................................................12–1
12.1.1 Implementation ................................................................................................................... 12–1
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12.2 Variable Data Rates.................................................................................................................. 12–5
CHAPTER 13. BUC FSK COMMUNICATIONS ....................................................................13–1
13.1 Introduction............................................................................................................................... 13–1
13.1.1 Transmission Interface........................................................................................................ 13–2
13.2 Message Structure.....................................................................................................................13–2
13.2.1 Command Message Structure (IDU to ODU)..................................................................... 13–2
13.2.2 Response Message Structure (BUC to IDU)....................................................................... 13–3
13.3 Power Class................................................................................................................................ 13–3
CHAPTER 14. DECODER...................................................................................................14–1
14.1 Decoder ...................................................................................................................................... 14–1
14.1.1 Sequential Decoder ............................................................................................................. 14–1
14.1.2 Viterbi Decoder...................................................................................................................14–3
CHAPTER 15. REED-SOLOMON CODEC .........................................................................15–1
15.1 Reed-Solomon Codec ................................................................................................................ 15–1
15.1.1 Specifications......................................................................................................................15–2
15.1.2 Theory of Operation............................................................................................................15–2
15.1.3 Reed-Solomon Encoder ...................................................................................................... 15–3
15.1.4 Reed-Solomon Decoder ...................................................................................................... 15–5
APPENDIX A SPECIFICATION ............................................................................................ A–1
A.1 Specifications .............................................................................................................................. A–1
A.2 Specification Summary.............................................................................................................. A–2
A.3 L-Band Modulator Specification Summary ............................................................................ A–3
A.4 Demodulator Specification Summary ...................................................................................... A–4
A.5 L-Band Modulator Specifications............................................................................................. A–5
A.5.1 Digital Data Rate.................................................................................................................. A–5
A.5.2 Modulation and Encoding Types ......................................................................................... A–6
A.5.3 Scrambling Types ................................................................................................................A–7
A.5.4 Modulator Frequency Reference.......................................................................................... A–7
A.5.5 Modulator Spurious Emissions ............................................................................................ A–8
A.5.6 Modulator Phase Noise ........................................................................................................ A–8
A.5.7 Modulator IF Output Spectrum Shape ................................................................................. A–8
A.5.8 L-Band INMARSAT Spurious Emissions........................................................................... A–8
A.5.9 Differential Encoder............................................................................................................. A–9
A.5.10 BPSK Bit Ordering .............................................................................................................. A–9
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A.5.11 Interleaver (Reed-Solomon Codec)...................................................................................... A–9
A.5.12 Modulator Transmit Frequency (IF) .................................................................................... A–9
A.5.13 Transmit Frequency Change Time....................................................................................... A–9
A.5.14 Modulator Transmit IF Output Switch................................................................................. A–9
A.5.15 Modulator Transmit IF Power.............................................................................................. A–9
A.5.16 Modulator Power Offset..................................................................................................... A–10
A.5.17 Modulator I / Q Imbalance................................................................................................. A–10
A.5.18 Modulator Output Noise Floor........................................................................................... A–10
A.5.19 Modulator Spectrum Rotation............................................................................................ A–10
A.5.20 Modulator Output Return Loss .......................................................................................... A–10
A.5.21 L-Band ODU Reference Signal ......................................................................................... A–10
A.5.22 L-Band ODU Control and Monitor.................................................................................... A–10
A.5.23 Modulator Transmit IF Test Modes................................................................................... A–10
A.5.24 L-Band ODU Supply Voltage............................................................................................ A–11
A.5.25 ODU DC Current Sense..................................................................................................... A–11
A.6 Encoding ................................................................................................................................... A–11
A.6.1 BPSK Encoding ................................................................................................................. A–11
A.6.2 OQPSK Encoding .............................................................................................................. A–12
A.6.3 8-PSK Encoding................................................................................................................. A–12
A.7 L-Band Demodulator Specifications ...................................................................................... A–13
A.7.1 Digital Data Rate................................................................................................................ A–13
A.7.2 Demodulation and FEC Decoding Types .......................................................................... A–14
A.7.3 Descrambling Types .......................................................................................................... A–15
A.7.4 Differential Decoder .......................................................................................................... A–15
A.7.5 BPSK Bit Ordering ............................................................................................................ A–15
A.7.6 Deinterleaver (Reed-Solomon Codec) ............................................................................... A–15
A.7.7 Demodulator Spectrum Rotation ....................................................................................... A–15
A.7.8 Receive Frequency............................................................................................................. A–16
A.7.9 Input Overload ................................................................................................................... A–16
A.7.10 Demodulator Input Return Loss......................................................................................... A–16
A.7.11 LNB Prime Power.............................................................................................................. A–16
A.7.12 LNB Band Control............................................................................................................. A–16
A.7.13 LNB Reference Signal ....................................................................................................... A–16
A.7.14 Receive Input Power (Composite) ..................................................................................... A–17
A.7.15 Demodulator Input Shape .................................................................................................. A–17
A.7.16 Receive Input Power (Desired Carrier).............................................................................. A–18
A.7.17 Demodulator Channel Spacing/Adjacent Carrier Performance ......................................... A–18
A.8 Bit Error Rate Performance ................................................................................................... A–19
A.8.1 Performance With Noise, Viterbi Decoder, and Closed Network ..................................... A–19
A.8.2 Performance with Noise, Viterbi Decoder, and Reed-Solomon (Optional).................... A–19
A.8.3 Performance With BPSK and {O}QPSK BER Performance ............................................ A–19
A.8.4 Performance with Noise Turbo Product Codec (Optional)................................................ A–20
A.8.5 Performance With Noise, 1544 kbps Sequential Decoder and Reed Solomon(Optional) A–20
A.8.6 Performance With Noise, 56 kbps Sequential Decoder (Optional) ................................... A–20
A.8.7 Performance With Noise, 1544 kbps Sequential Decoder (Optional) ............................... A–21
A.8.8 BER Threshold................................................................................................................... A–21
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A.9 Acquisition Time ...................................................................................................................... A–22
A.9.1 Receive Carrier Acquisition Range.................................................................................... A–23
A.9.2 Receive Carrier Reacquisition ........................................................................................... A–23
A.9.3 AGC Output ....................................................................................................................... A–23
A.9.4 Doppler Tracking Performance.......................................................................................... A–23
A.10 Interface Specifications........................................................................................................ A–24
A.10.1 TX Clock Switching Due to Failure of Selected Clock ..................................................... A–24
A.10.2 TX Clock Phase Adjustment.............................................................................................. A–24
A.10.3 TX Data Phase Adjustment................................................................................................ A–24
A.10.4 Transmit Clock Source....................................................................................................... A–24
A.10.5 Send Clock Timing Source ................................................................................................ A–24
A.10.6 Doppler/Plesiochronous Buffer Clock Source ................................................................... A–25
A.10.7 RX Clock Switching Due to Failure of Selected Clock..................................................... A–25
A.10.8 RX Clock Phase Adjustment.............................................................................................. A–25
A.10.9 RX Clock Jitter .................................................................................................................. A–25
A.10.10 RX Data Phase Adjustment............................................................................................ A–25
A.10.11 Buffer Centering ............................................................................................................ A–25
A.10.12 Receive Doppler/Plesiochronous Buffer Size................................................................ A–26
A.10.13 Switch Faults.................................................................................................................. A–26
A.11 Decoding................................................................................................................................ A–26
A.11.1 BPSK Decoding ................................................................................................................. A–26
A.11.2 QPSK Decoding................................................................................................................. A–26
A.11.3 Offset QPSK Decoding (Optional) .................................................................................... A–27
A.11.4 8-PSK Decoding ................................................................................................................ A–27
A.12 Terrestrial Interface Types ................................................................................................. A–28
A.12.1 EIA-232 Specification........................................................................................................ A–28
A.12.2 V.35 Specification V.10, V.11 Specification, Circuit Supported ...................................... A–29
A.12.3 EIA-449/EIA-422 Mil-188-114A Specification ................................................................ A–30
A.13 AUPC Specification (Optional)........................................................................................... A–31
A.13.1 AUPC Parameters .............................................................................................................. A–32
A.13.2 AUPC with Reed-Solomon Option.................................................................................... A–32
A.13.3 Turbo AUPC ...................................................................................................................... A–32
A.14 System Specifications........................................................................................................... A–33
A.14.1 Loopback Modes................................................................................................................ A–33
A.14.2 Test Modes......................................................................................................................... A–33
A.14.3 Remote Control.................................................................................................................. A–34
A.14.4 Modem Remote Address.................................................................................................... A–34
A.14.5 Monitored Signals.............................................................................................................. A–34
A.15 Stored Faults......................................................................................................................... A–35
A.16 Stored Configurations.......................................................................................................... A–35
A.17 Interoperability Modes ........................................................................................................ A–35
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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/Response................................................................................................................... B–3
B.2.4 End Character............................................................................................................................. B–4
B.3 Configuration Commands/Responses............................................................................................B–5
B.3.1 Modulator Configuration Commands ........................................................................................ B–5
B.3.2 Demodulator Configuration Commands .................................................................................... B–7
B.3.3 Interface Configuration Commands ........................................................................................... B–9
B.3.4 System Configuration Commands............................................................................................ B–11
B.3.5 Automatic Uplink Power Control (AUPC) .............................................................................. B–12
B.4 Status Commands/Responses ....................................................................................................... B–14
B.4.1 Modulator Configuration Status............................................................................................... B–14
B.4.3 ODU Configuration Status................................................................................................ B–19
B.4.4 Fault Status........................................................................................................................ B–20
B.4.2 Error Performance .................................................................................................................... B–21
B.5 Stored Faults.................................................................................................................................. B–24
APPENDIX C. BURST MODE MODULATOR OPERATION .............................................. C–1
C.1 Burst Mode Modulator: Theory of Operation ........................................................................ C–1
C.1.1 Burst Mode........................................................................................................................... C–1
C.2 Burst Mode Modulator: Specifications .................................................................................... C–2
C.2.1 Digital Data Rate.................................................................................................................. C–2
C.2.2 Modulation and Encoding Types ......................................................................................... C–2
C.2.3 Scrambling Types ................................................................................................................C–3
C.2.4 Differential Encoder............................................................................................................. C–3
C.2.5 Transmit Frequency (IF) ...................................................................................................... C–3
C.2.6 Frequency Reference............................................................................................................ C–3
C.2.7 Transmit Frequency Change Time....................................................................................... C–3
C.2.8 Phase Noise.......................................................................................................................... C–4
C.2.9 Transmit IF Output Switch .................................................................................................. C–4
C.2.10 Transmit IF Power ...............................................................................................................C–4
C.2.11 Modulator Power Offset....................................................................................................... C–4
C.2.12 Modulated IF Output Shape................................................................................................. C–4
C.2.13 Spurious Emissions..............................................................................................................C–5
C.2.14 Modulator Phase Error......................................................................................................... C–5
C.2.15 Transmit IF Test Modes....................................................................................................... C–5
C.2.16 Modulator Spectrum Rotation.............................................................................................. C–5
C.2.17 Transmit Preamble ...............................................................................................................C–6
C.2.18 Transmit Packet ................................................................................................................... C–6
C.2.19 Transmit Postamble ............................................................................................................. C–6
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C.3 Burst Mode Demodulator: Theory of Operation .................................................................... C–7
C.3.1 Burst Mode........................................................................................................................... C–7
C.4 Burst Mode Demodulator: Specifications................................................................................ C–8
C.4.1 Digital Data Rate.................................................................................................................. C–8
C.4.2 Demodulation and FEC Decoding Types ............................................................................ C–8
C.4.3 Descrambling Types ............................................................................................................ C–8
C.4.4 Differential Decoder ............................................................................................................C–9
C.4.5 Demodulator Spectrum Rotation ......................................................................................... C–9
C.4.6 Receive Frequency (IF)........................................................................................................ C–9
C.4.7 Receive Input Power (Desired Carrier)................................................................................ C–9
C.4.8 Receive Input Power (Composite) ....................................................................................... C–9
C.4.9 IF Input Overload................................................................................................................. C–9
C.4.10 Demodulator IF Input Shape................................................................................................ C–9
C.4.11 Channel Spacing/Adjacent Carrier Performance ............................................................... C–10
C.4.12 Acquisition Time ............................................................................................................... C–10
C.4.13 Acquisition Probability ...................................................................................................... C–10
C.4.14 Receive IF Carrier Acquisition Range ............................................................................... C–10
C.4.15 Collision Recovery............................................................................................................. C–11
C.5 Burst Mode System - Specifications ....................................................................................... C–11
C.5.1 Loopback Modes................................................................................................................ C–11
C.5.2 Remote Control.................................................................................................................. C–12
C.5.3 Modem Remote Address.................................................................................................... C–12
C.5.4 Monitored Signals.............................................................................................................. C–12
C.5.5 Faults Monitored................................................................................................................ C–12
C.5.6 Stored Faults ...................................................................................................................... C–16
C.5.7 Stored Configurations ........................................................................................................ C–16
C.6 Burst Mode Specifications....................................................................................................... C–17
GLOSSARY G–1
INDEX i–1
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Figures
FIGURE 1-1. BLOCK DIAGRAM..........................................................................................................................1–2
FIGURE 1-2. DEMODULATOR BLOCK DIAGRAM ..........................................................................................1–9
FIGURE 1-3. M&C BLOCK DIAGRAM..............................................................................................................1–12
FIGURE 1-4. DIMENSIONAL ENVELOPE DRAWING ....................................................................................1–14
FIGURE 2-1. INSTALLATION OF THE OPTIONAL MOUNTING BRACKET KT/6228-1 ..............................2–3
FIGURE 2-2. REED-SOLOMON CODEC INSTALLATION................................................................................2–5
FIGURE 2-3. TURBO CODEC INSTALLATION..................................................................................................2–7
FOR RIBBON-CONFIGURED CONNECTOR FIGURE 2-4. DATA I/O CONNECTOR (J8)
REMOVAL/INSTALLATION.........................................................................................................................2–9
FIGURE 2-5. MAIN BOARD FIELD-CHANGEABLE CHIPS (SHOWN WITH OVERHEAD CARD
REMOVED) ...................................................................................................................................................2–10
FIGURE 3-1. REAR PANEL...................................................................................................................................3–1
FIGURE 4-1. FRONT PANEL VIEW .....................................................................................................................4–1
FIGURE 4-2. KEYPAD ...........................................................................................................................................4–3
FIGURE 4-3. MENU TREE.....................................................................................................................................4–6
FIGURE 4-4. RF LOOPBACK ..............................................................................................................................4–21
FIGURE 4-5. IF LOOPBACK ...............................................................................................................................4–22
FIGURE 4-6. BASEBAND LOOPBACK..............................................................................................................4–30
FIGURE 4-7. INTERFACE LOOPBACK .............................................................................................................4–31
FIGURE 6-1. EIA-422, EIA-232, OR V.35 MASTER/MASTER CLOCKING DIAGRAM..................................6–3
FIGURE 6-2. EIA-422, EIA-232, OR V.35 MASTER/SLAVE CLOCKING DIAGRAM.....................................6–4
FIGURE 6-3. CLOCK SLIP..................................................................................................................................6–5
FIGURE 6-4. DOPPLER SHIFT..............................................................................................................................6–6
FIGURE 7-1. VITERBI DECODER........................................................................................................................7–7
FIGURE 7-2. VITERBI DECODER AND REED-SOLOMON ..............................................................................7–8
FIGURE 7-3. BPSK AND {O}QPSK BER PERFORMANCE ...............................................................................7–9
FIGURE 7-4. TURBO PRODUCT CODEC..........................................................................................................7–10
FIGURE 7-5. SEQUENTIAL DECODER, REED-SOLOMON, AND 1544 KBPS .............................................7–11
FIGURE 7-6. SEQUENTIAL DECODER AND 56 KBPS ...................................................................................7–12
FIGURE 7-7. SEQUENTIAL DECODER AND 1544 KBPS................................................................................7–13
FIGURE 8-1. FAULT ISOLATION TEST SETUP.................................................................................................8–2
FIGURE 8-2. TYPICAL OUTPUT SPECTRUM ...................................................................................................8–5
FIGURE 8-3. TYPICAL EYE CONSTELLATIONS ..............................................................................................8–6
FIGURE 10-1. AUPC BLOCK DIAGRAM ..........................................................................................................10–2
FIGURE 11-1. TRANSMIT SECTION OF THE ASYMMETRICAL LOOP TIMING BLOCK DIAGRAM.....11–2
FIGURE 11-2. RECEIVE SECTION OF THE ASYMMETRICAL LOOP TIMING BLOCK DIAGRAM ........11–3
FIGURE 14-1. SEQUENTIAL DECODER BLOCK DIAGRAM.........................................................................14–1
FIGURE 14-2. VITERBI DECODER BLOCK DIAGRAM..................................................................................14–3
FIGURE 15-1. REED-SOLOMON PCB (AS/5304-1)...........................................................................................15–1
FIGURE 15-2.REED-SOLOMON CODEC BLOCK DIAGRAM .........................................................................15–2
FIGURE 15-3. REED-SOLOMON ENCODER SECTION BLOCK DIAGRAM ................................................15–3
FIGURE 15-4. REED-SOLOMON CODE PAGE FORMAT ................................................................................15–4
FIGURE 15-5. REED-SOLOMON DECODER SECTION BLOCK DIAGRAM ................................................15–5
FIGURE A-1. CARRIER LEVEL VS SYMBOL RATE......................................................................................A–18
FIGURE C-1. SNM-1001L BURST MODE FAULT TREE ................................................................................ C–13
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Tables
TABLE 1-1. FAST OPTIONS AND REQUIRED CONFIGURATIONS...............................................................1–4
TABLE 3-1. MODEM REAR PANEL CONNECTORS.........................................................................................3–2
TABLE 3-2. REMOTE CONNECTOR AND PINOUTS (J6).................................................................................3–3
TABLE 3-3. FAULT CONNECTOR AND PINOUTS (J7) ....................................................................................3–4
TABLE 3-4. 25-PIN D CONNECTOR PINOUTS ..................................................................................................3–6
TABLE 3-5. 34-PIN WINCHESTER CONNECTOR PINOUTS (V.35) ................................................................3–7
TABLE 3-6. 37-PIN CONNECTOR PINOUTS (OPTIONAL)...............................................................................3–8
TABLE 3-7. AUX 1 CONNECTOR AND PINOUTS (J9).....................................................................................3–9
TABLE 3-8. ALARMS CONNECTOR AND PINOUTS (J10).............................................................................3–10
TABLE 4-1. LED INDICATORS ............................................................................................................................4–2
TABLE 4-2. CUSTOM MODEM DEFAULTS.....................................................................................................4–97
TABLE 5-1. MODEM TYPE SELECTION ............................................................................................................5–1
TABLE 5-2. COMTECH EFD CLOSED NETWORK PARAMETER SETTINGS...............................................5–3
TABLE 5-3. REED-SOLOMON MODES...............................................................................................................5–4
TABLE 7-1. AVAILABLE TPC MODES ...............................................................................................................7–2
TABLE 7-2. TURBO PRODUCT CODING PROCESSING DELAY COMPARISON..........................................7–3
TABLE 8-1. CONVERSION TO S/N AND EB/N0 CHART..................................................................................8–4
TABLE 10-1. SETTING AUPC PARAMETERS..................................................................................................10–3
TABLE A-1. SYSTEM SPECIFICATION SUMMARY........................................................................................A–2
TABLE A-2. L-BAND MODULATOR..................................................................................................................A–3
TABLE A-3. DEMODULATOR SPECIFICATION ..............................................................................................A–4
TABLE A-4. MODULATOR DIGITAL DATA RATES.......................................................................................A–5
TABLE A-5. MODULATION AND ENCODING TYPES....................................................................................A–6
TABLE A-6. SCRAMBLING TYPES....................................................................................................................A–7
TABLE A-7. DEMODULATOR DIGITAL DATA RATE..................................................................................A–13
TABLE A-8. L-BAND DEMODULATION AND FEC DECODING TYPES ....................................................A–14
TABLE A-9. DESCRAMBLING TYPES.............................................................................................................A–15
TABLE A-10. AUPC PARAMETERS .................................................................................................................A–32
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About this Manual
This manual provides installation and operation information for the Comtech EF Data
SNM-1001A satellite modem. This is a technical document intended for earth station
engineers, technicians, and operators responsible for the operation and maintenance of
the SNM-1001A.
Related Documents
The following documents are referenced in this manual:
• INTELSAT Earth Station Standards 308, 309, and 310
Conventions and References
Cautions and Warnings
CAUTION
CAUTION indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury. CAUTION may also be used to indicate other
unsafe practices or risks of property damage.
WARNING
WARNING indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
IMPORTANT
IMPORTANT indicates a statement that is associated with the task
being performed. .
Examples of Multi-Hazard Formats
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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, RS-
485, etc.). All other references in the manual will be shown with the EIA designations
(EIA-232, EIA-485, etc.) only.
Trademarks
Product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies and are hereby acknowledged.
Reporting Comments or Suggestions Concerning this Manual
Comments and suggestions regarding the content and design of this manual will be
appreciated. To submit comments, please contact the Comtech EF Data Customer
Support Department.
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ELECTRICAL SAFETY
The SNM-1001L Satellite Modem has been shown to comply with the following safety standard:
• EN 60950: Safety of Information Technology Equipment, including electrical business
machines.
The equipment is rated for operation over the range 85 to 264 volts AC. It has a maximum
power consumption of 60 watts.
FUSES
The SNM-1001L Satellite Modem is fitted with two fuses, one each for line and neutral
connections. These are contained within the body of the IEC power connector, behind a small
plastic flap.
• For 230 volt AC operation, use T0.75A, 20mm fuses.
• For 115 volt AC operation, use T1.25A fuses, 20mm fuses.
IMPORTANT
For continued operator safety, always replace the fuses with the
correct type and rating.
Environmental
The SNM-1001L shall not be operated in an environment where the unit is exposed to
extremes of temperature outside the ambient range 0 to 50°C (32 to 122°F), precipitation,
condensation, or humid atmospheres above 95% RH, altitudes (un-pressurised) greater
than 2000 metres, excessive dust or vibration, flammable gases, corrosive or explosive
atmospheres.
Operation in vehicles or other transportable installations that are equipped to provide a
stable environment is permitted. If such vehicles do not provide a stable environment,
safety of the equipment to EN60950 may not be guaranteed.
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