Mocomtech SLM-5650 User Manual

g

SLM-5650

Satellite Modem

Installation and O

IMPORTANT NOTE: The information contained in this document supersedes all
previously published information regarding this product. This manual is subject to
chan

e without prior notice.

Part Number MN/SLM5650.IOM Revision 2

peration Manual

Errata A

Comtech EF Data Documentation Update

Subject:

Date:
Original Manual
Part Number/Rev:
Errata Number:

Agile Document ID

Change Specifics:

This information will be incorporated into the next revision.

Front Cover – Removed “Prelimin

B.4 Basic Protocol

Changes to Front Cover and Section B.4, Basic Protocol

October 15, 2007
MN/SLM5650.IOM Rev 2

ER-SLM5650.EA2

ER-SLM5650.EA2

ary".

Agile CO Number

CO1453

Whether in EIA-232 or EIA-485 mode, all data is transmitted as asynchronous serial characters,
suitable for transmission and reception by a UART. In this case, the asynchronous character
format is 8N1. The baud rate may vary between 2400 and 57,600 baud.

AGILE DOC ID ER-SLM5650.EA2 THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE! AGILE CO1453

1

This page is intentionally blank.

AGILE DOC ID ER-SLM5650.EA2 THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE! AGILE CO1453

2

Subject:
Date:

Errata B

Comtech EF Data Documentation Update

Changes to Chapter 2. Installation
October 9, 2008

Original Manual
Part Number/Rev:

Agile Document ID

MN/SLM5650.IOM

ER-SLM5650.EB2

Agile CO Number

Rev 2

C05284

Change Specifics:

In Chapter 2. INSTALLATION, Sect. 2.3.8 Auxiliary Connector (J9), Page 2-9: Revise the pinout table for
the 15-pin connector as follows:

From: To:

This information will be incorporated into the next manual revision.

AGILE DOC ID ER-SLM5650.EB2 THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE! AGILE C05284

1

This page is intentionally blank.

AGILE DOC ID ER-SLM5650.EB2 THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE! AGILE C05284

2

SLM-5650

Satellite Modem

Installation and Operation Manual

Comtech EF Data is an ISO 9001

Re

gistered Company.

Part Number MN/SLM5650.IOM

Revision 2

August 19, 2006

Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: [phone].

Copyright © Comtech EF Data, 2006. All rights reserved. Printed in the USA.

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:

[e-mail]

Contact us via the web at

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

2. Request a Return Material Authorization (RMA) number from the Comtech EF
Data 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 EF Data. (Shipping charges should be
prepaid.)

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

0Hwww.comtechefdata.com.

ii

Table of Contents

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

1.1 Introduction 1–1

1.1.1 Features....................................................................................................................................1–2

1.1.2 Options......................................................................................................................................1–3

1.2 Modem Design 1–3

1.3 Modem Description 1–3

1.4 Operating Modes 1–5

1.4.1 Closed Networks.......................................................................................................................1–5

1.4.2 Open Networks (INTELSAT) ....................................................................................................1–5

1.4.3 OM-73.......................................................................................................................................1–5

1.5 Data Interfaces 1–5

1.5.1 TIA/EIA-530..............................................................................................................................1–6

1.5.2 TIA/EIA-613 (HSSI)...................................................................................................................1–6

1.5.3 Gigabit Ethernet........................................................................................................................1–6

1.6 Independent Tx and Rx Function 1–6

1.7 Interoperability 1–7

1.7.1 Interoperability with Legacy Modems.......................................................................................1–7

1.7.2 Protection Switches..................................................................................................................1–7

1.8 Summary of Specifications 1–8

1.8.1 Performance...........................................................................................................................1–10

1.8.2 Acquisition and Timing Performance Requirements ..............................................................1–10

iii

SLM-5650 Satellite Modem Revision 2
Preface

1.8.3 Data Quality Performance......................................................................................................1–11

1.8.3.1 OM-73 Compatible Mode Performance..................................................................1–11

1.8.3.2 MIL-STD-188-165A Compatible Mode Performance..............................................1–11

1.8.3.3 IESS-308 Compatible Mode Performance..............................................................1–12

1.8.3.4 IESS-309 Compatible Mode Performance..............................................................1–12

1.8.3.5 IESS-310 Compatible Mode Performance..............................................................1–12

1.8.3.6 16-QAM Coding Mode Performance.......................................................................1–12

1.8.3.7 Turbo Coding Mode Performance...........................................................................1–12

1.8.3.8 BER.........................................................................................................................1–13

1.8.3.8.1 BPSK/QPSK/Offset QPSK BER Performance, Veterbi Decoding.............1–13

1.8.3.8.2 BPSK/QPSK/Offset QPSK BER Performance, Veterbi Decoding and Reed- ..

Solomon......................................................................................................1–13

1.8.3.8.3 8-PSK BER Performance, Trellis Decoder.................................................1–14

1.8.3.8.4 8-PSK BER Performance, Trellis Decoder and Reed-Solomon.................1–14

1.8.3.8.5 16-QAM BER Performance, Viterbi Decoder and Reed-Solomon.............1–14

1.8.3.8.6 BER Performance, Turbo Products Code Decoding..................................1–15

1.8.4 BER Performance with Symmetrical Adjacent Carriers..........................................................1–16

1.8.5 BER Performance with Asymmetrical Adjacent Carriers........................................................1–17

1.9 Dimensional Envelope 1–18

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

2.1 Unpacking 2–1

2.2 Installation 2–2

2.2.1 Optional Installation of Side-Railings........................................................................................ 2–2

2.2.2 Optional Installation Using a Typical Customer Rack...............................................................2–3

2.3 External Connections 2–4

2.3.1 External Reference, (J1)..........................................................................................................2–5

2.3.2 70 / 140 IF Interface Connectors.............................................................................................. 2–5

2.3.3 L-Band IF Interface Connectors................................................................................................2–5

2.3.4 Ethernet Remote Cont rol Connector, (J5)................................................................................2–5

2.3.5 EIA-530 Connector, (J6)...........................................................................................................2–6

2.3.6 HSSI Connector, (J7)................................................................................................................2–7

2.3.7 Alarms Connector, (J8)............................................................................................................. 2–8

2.3.8 Auxiliary Connector, (J9)..........................................................................................................2–8

2.3.9 Remote Connector, (J10).........................................................................................................2–9

2.3.10 Overhead Data, (P1)...............................................................................................................2–10

2.4 AC Power Connector 2–11

2.5 Ground Connector (GND) 2–11

2.6 Gigabit Ethernet 2–11

iv

SLM-5650 Satellite Modem Revision 2
Preface

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

3.1 Modes 3–1

3.2 Clocking Options 3–11

3.2.1 IDR/IBS G.703 Master/Master................................................................................................3–11

3.2.2 IDR/IBS G.703 Master/Slave..................................................................................................3–11

3.3 Buffering 3–14

3.4 Doppler 3–17

3.5 Plesiochronous 3–18

3.6 Frame/Multiframe Length 3–19

3.6.1 Multiples of the Frame Length................................................................................................ 3–19

3.6.2 Total Buffer Length.................................................................................................................3–19

3.6.3 Converting B etween Bits and Seco nds..................................................................................3–19

CHAPTER 4. FRONT PANEL OPERATION........................................................................................4–1

4.1 Front Panel 4–1

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

4.1.2 Front Panel Keypad..................................................................................................................4–4

4.1.3 Menu Matrix..............................................................................................................................4–5

4.2 Opening Screen 4–6

4.3 Main Menu 4–6

4.3.1 Select: Config............................................................................................................................4–7

4.3.1.1 Select: CONFIG: Transmit ........................................................................................4–8

4.3.1.2 Select: CONFIG: Receive .......................................................................................4–11

4.3.1.3 Select: CONFIG: Mode ...........................................................................................4–16

4.3.1.4 Select: Configuration: AUPC: Local........................................................................4–17

4.3.1.5 Select: CONFIG: Ref...............................................................................................4–18

4.3.1.6 Select: CONFIG: Mask............................................................................................4–18

4.3.1.7 Select: CONFIG: Reset...........................................................................................4–19

4.3.1.8 Select: CONFIG: Remote........................................................................................4–19

4.3.2 Select: Monitor........................................................................................................................4–21

4.3.2.1 Select: Monitor: Alarms...........................................................................................4–22

4.3.2.2 Select: Monitor: Event-Log......................................................................................4–24

4.3.2.3 Select: Monitor: Rx-Params....................................................................................4–25

4.3.2.4 Select: Monitor: Statistics........................................................................................4–25

4.3.2.5 Select: Monitor: GigaBit I/F Statistics......................................................................4–26

4.3.3 Select: Test.............................................................................................................................4–26

4.3.3 Select: Save/Load...................................................................................................................4–28

4.3.4 Select: Utility...........................................................................................................................4–28

4.3.4.1 Select: Utility: Firmware...........................................................................................4–29

4.3.4.2 Select: Utility: FAST ................................................................................................4–31

4.3.4.3 Display Screen Saver Status...................................................................................4–32

v

SLM-5650 Satellite Modem Revision 2
Preface

CHAPTER 5. MAINTENANCE..............................................................................................................5–1

5.1 System Checkout 5–1

5.1.1 Checkout...................................................................................................................................5–2

5.1.2 Interface Checkout....................................................................................................................5–2

5.1.3 Modulator Checkout..................................................................................................................5–3

5.2 Demodulator Checkout 5–6

5.3 Fault Isolation 5–9

5.4 System Faults/Alarms 5–10

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

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

APPENDIX C. FLASH UPGRADING ...................................................................................................C–1

APPENDIX D. ETHERNET MANAGEMENT........................................................................................D–1

APPENDIX E. CDI-70 GIGABIT ETHERNET INTERFACE.................................................................E–1

vi

SLM-5650 Satellite Modem Revision 2
Preface

Figures

Figure 1-1. SLM-5650..............................................................................................................................1–1

Figure 1-2. SLM-5650 Block Diagram......................................................................................................1–4

Figure 1-3. Dimensional Envelope.........................................................................................................1–18

Figure 2-1. Typical Installation of Side-Railings, FP/SL0006...................................................................2–2

Figure 2-2. Typical Customized Rack......................................................................................................2–3

Figure 2-3. Rear Panel.............................................................................................................................2–4

Figure 3-1. IDR/IBS G.703 Master/Master Clocking Diagram...............................................................3–12

Figure 3-2. IDR/IBS G.703 Master/Slave Clocking Diagram.................................................................3–13

Figure 3-3. Clock Slip.............................................................................................................................3–15

Figure 3-4. Doppler Shift........................................................................................................................3–16

Figure 4-1. Modem Front Panel...............................................................................................................4–1

Figure 4-2. Keypad...................................................................................................................................4–4

Figure E-1 10/100/1000 Base-T (GbE) Interface.....................................................................................E–1

Figure E-2. GbE Interface Optional Board................................................................................................E–4

Figure E-3. 1000 Base-T Ethernet (GbE) Card .......................................................................................E–5

vii

SLM-5650 Satellite Modem Revision 2
Preface

Tables

Table 1-1. Summary of Specification.......................................................................................................1–8

Table 1-2. Acquisition and Timing Performance Requirements ............................................................1–10

Table 1-3. Doppler Requirements..........................................................................................................1–11

Table 1-4. Viterbi Decoder BER.............................................................................................................1–13

Table 1-5. Viterbi Decoder with Reed-Solomon BER............................................................................1–13

Table 1-6. 8-PSK BER Performance, Trellis Decoder...........................................................................1–14

Table 1-7. 8-PSK BER Performance, Trellis Decoder with Reed-Solomon .........................................1–14

Table 1-8. 16-QAM BER Performance, Viterbi Decoder with Reed-Solomon......................................1–14

Table 1-9. BER Performance, TPC Decoding .......................................................................................1–15

Table 1-10. Acceptable ACI Degradation with Spacing Factor of 1.2 ...................................................1–16

Table 3-1. OM-73 Mode............................................................................................................................3–1

Table 3-2. MIL-STD-188-165A Mode.......................................................................................................3–2

Table 3-3. IESS-308 Mode – Standard Higher Rates..............................................................................3–3

Table 3-4. IESS-308 Mode - Extended....................................................................................................3–6

Table 3-5. IESS-309 Mode – Extended (Closed Network)......................................................................3–8

Table 3-6. IESS-310 Mode – Extended Rates.........................................................................................3–9

Table 3-7. Turbo Code Mode...................................................................................................................3–9

Table 3-8. 16-QAM Mode.......................................................................................................................3–10

Table A-1. Viterbi Decoding Summary.....................................................................................................A–2

Table A-2. Open Network Modes.............................................................................................................A–4

Table A-3. Concatenated RS Coding Summary......................................................................................A–5

Table A-4. 8-PSK/TCM Coding Summary ...............................................................................................A–6

Table A-5. Available TPC Modes.............................................................................................................A–6

Table E-1. Interface Specifications..........................................................................................................E–2

Table E-2. Connector Pinout....................................................................................................................E–4

viii

SLM-5650 Satellite Modem Revision 2
Preface

About this Manual

This manual describes the installation and operation for the Comtech EF Data SLM-5650
Satellite Modem. This is a technical document intended for earth station engineers, technicians,
and operators responsible for the operation and maintenance of the SLM-5650.

Related Documents

The following documents are referenced in this manual:

• Department of Defense (DOD) MIL-STD-188-114A, Electrical Characteristics of Digital
Interface Circuits

• Comtech EF Data Specification SP/11226

• INTELSAT Earth Station Standards 308 and 309

• EUTELSAT SMS

ix

SLM-5650 Satellite Modem Revision 2
Preface

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

WARNING

IMPORTANT

unsafe practices or risks of property damage.

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

IMPORTANT indicates a statement that is associated with the task
being performed.

Examples of Multi-Hazard

Formats

x

SLM-5650 Satellite Modem Revision 2
Preface

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 are equivalent to the designation of the Electronic
Industries Association (EIA). Comtech EF Data will reference only one designator throughout the
manual.

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.

Revision 2 Highlights

• Incorporated engineering changes throughout the manual.

• Revised Chapter 4, Front Panel Operation.

• Revised Appendix D, Ethernet Management.

• Revised Appendix E. 10/100/1000 Base-T (GbE) Interface

xi

SLM-5650 Satellite Modem Revision 2
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 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.

xii

SLM-5650 Satellite Modem Revision 2
Preface

Warranty Policy

This Comtech EF Data 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 EF Data 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 EF Data and all
related custom, taxes, tariffs, insurance, etc. Comtech EF Data is responsible for the freight
charges only for return of the equipment from the factory to the customer. Comtech EF Data will
return the equipment by the same method (i.e., Air, Express, Surface) as the equipment was sent
to Comtech EF Data.

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 repackaging of
equipment for return to Comtech EF Data.

No other warranty is expressed or implied. Comtech EF Data 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 EF Data shall
not be liable for any direct, indirect, special, incidental, or consequential damages, whether based
on contract, tort, or any other legal theory.

Disclaimer

Comtech EF Data has reviewed this manual thoroughly in order that it will be an easy-to-use
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 EF Data 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 EF Data Customer Support Department.

xiii

SLM-5650 Satellite Modem Revision 2
Preface

Notes:

______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________

xiv

This chapter describes an overview of the SLM-5650 Satellite Modem, referred to in this
manual as “the modem” (Figure 1-1).

1.1 Introduction

The SLM-5650 satisfies the requirements for applications that require state-of-the-art modulation
and coding techniques to optimize satellite transponder bandwidth usage while retaining
backward compatibility in government and military communications systems. The initial release
of the modem supports base-band data rates up to 51.840 Mbps, and its flexible modulation and
Forward Error Correction (FEC) capabilities ensure that the throughput and BER over the
satellite is optimized.

Chapter 1. Introduction

Figure 1-1. SLM-5650

1–1

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

1.1.1 Features

The modem incorporates the following:

• MIL-STD-188-165A compliant (Types A, B, D, E, F)

• Intel-Sat IESS-308, -309, -310, and -315

• 64 kbps to 52 Mbps (Modulation, code rate, and interface dependent)

• Selectable 70/140 MHz or 950 to 2000 MHz IF interfaces

• BPSK, QPSK, OQPSK, 8-PSK, and 16-QAM

• Adaptive Equalizer for high order modulation types

• FEC Rates: 5/16, 1/2, 2/3, 3/4, 5/6, 7/8, 17/18 and 1/1

• Viterbi and Reed-Solomon Codec

• Turbo Product Codec (Optional)

• EIA-530/422 Data Interface (built in, to 20 Mbps)

• EIA-613/HSSI Data Interface (built in, to 52 Mbps)

• Optional Plug in Data Interface supports Gigabit Ethernet and others

• Data Source Bit Synchronization (Clock recovery for input data without an

associated transmit clock)

• Asymmetrical Loop Timing

• Full featured, built-in BER test-set

• Electrical and Ethernet Rx constellation monitor

• EIA-485 and EIA-232 interface for remote control

• Ethernet interface for remote control using HTTP, Telnet, and SNMP

• Flash upgrade capability

The modem is compliant with the provisions of MIL-STD-188-165A, DoD Standard,
Interoperability of SHF Satellite Communications PSK Modems (Frequency Division Multiple
Access (FDMA) Operation).

The modem is fully interoperable with legacy OM-73 modems and other Government owned
Commercial off-the-Shelf (COTS) and International Telecommunications Satellite Organization
(INTELSAT) compatible PSK modems.

The modem can be controlled and monitored from a variety of platforms, including its own front
panel controls and indicators, a co-located Personal Computer (PC) and remote control systems
such as the Comtech Monitor and Control System (CMCS) and the Vipersat Network

M

anagement System (VNMS).

1–2

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

1.1.2 Options

How Enabled Option

FAST Variable data rates from 64 kbps to 5, 10, 20, or 52 Mbps
FAST 8-PSK and 16-QAM
FAST Turbo Data Rates to 5, 10, 20, and 52 Mbps
FAST Automatic Uplink Power Control (AUPC)
Hardware Turbo FEC (Card)
Hardware Gigabit Ethernet Interface (Card)

1.2 Modem Design

The modem was designed to accommodate a wide range of currently required features and to be
able to support both near term and far term advances in both software defined radio technology as
well as advances in FEC technology.

The user has the ability to:

• Add or change modular data interfaces and FEC assemblies

• Utilize an extensive array of built in test capabilities

• Be able to easily upgrade the modems capability in the field

• Be able to easily upgrade the modems software in the field

• Have a wide range of flexible remote control options

The user can expect:

• A highly reliable modem

• Low weight and low power dissipation

• A rugged, one-rack unit enclosure that defines state of the art.

The modem is designed for installation in fixed or mobile Earth Terminal (ET) facilities (sites)
using Defense Satellite Communications System III (DSCS III), DSCS III/Satellite Life
Enhancement Program (SLEP), Wideband Gap filler System (WGS), and commercial satellites.

1.3 Modem Description

The modem accepts signals from a selected digital signal source and modulates either a 70/140
MHz or L-Band Intermediate Frequency (IF) carrier with these signals. The demodulator will
receive (Rx) a signal from either a 70/140 MHz or L-Band IF input interface, then demodulate
the IF carrier. Clock and data are recovered and output on a selected data interface.
The transmit and receive functions are independent with respect to coding, interleaving,
overhead, and scrambling. The modem will not allow simplex operation in the 70/140 and
simplex operation in the L-Band IF interfaces at the same time. The modem will allow duplex
operation in either one of the two IF interfaces.

1–3

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

64 kbps to 20 Mbps

64 kbps to 52 Mbps

Optional Interface
Gigabit Interface

Remote Port

Ethernet

Alarms

Data Interface

EIA-530

Data Interface

HSSI

Data Interface

Optional Slot

Overhaul Data

Interface

EIA-232
EIA-485

10/100
BaseT

Alarms

Tx/Rx

Baseband

Processing

Bit Error
Test Set

Reed-Solomon

Bypass

Bypass

Reed-Solomon

Bypass
Bypass

uP

Power Supply

Tx FEC

Viterbi

Optional FEC Slot

Slot#1 Turbo Tx/Rx

Slot#2 LDPC (Future)

Rx FEC

Viterbi

Keypad

&

Display

Constellation

Tx

Demodulator

Nyquist Filtering

Modulator

Nyquist
Filtering

Mapping

Acquisition

Rx Synth

Figure 1-2. SLM-5650 Block Diagram

70/140

Tx/Synth

L-Band

70/140

RX Synth

IF Sections

Power Control

L-Band

Tx Synth

Power

Control

AGC

AGC

Tx 70/140 MHz

Tx L-Band

Rx L-Band

RX 70/140 MHz

1–4

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

1.4 Operating Modes

The modem supports Closed Network, Open Network and OM-73 modes of operation
described as follows.

1.4.1 Closed Networks

Closed networks refer to private networks with modem operational parameters that do not need to
interoperate with modems developed for commercial open networks, as specified under the IESS­308, IESS-309, and IESS-310.

The modem, however, is capable of operating in such closed networks over commercial satellites
IAW INTELSAT requirements for closed network operation.

A Comtech EF Data overhead channel is provided for use during Closed Network operation.

1.4.2 Open Networks (INTELSAT)

Open networks refer to networks that must meet INTELSAT specified Effective Isotropic
Radiated Power (EIRP), EIRP stability, spurious emissions, intermodulation products, adjacent

carrier interference, frequency tolerance, equalization, and modem parameters such as
modulation, FEC, and scrambling.

The modem meets INTELSAT certification requirements and is capable of operating in such
open networks over commercial satellites IAW IESS-308, IESS-309, and IESS-310 requirements
for open network operation.

In order to be fully compatible with commercial modems complying with IESS-308, IESS-309,
and IESS-310, the modem supports the overhead framing integral to those modems. It is
important to note that no access to the overhead channel data or alarms is provided.

1.4.3 OM-73

OM-73 mode allows the SLM-5650 to be compatible with Linkabit’s original OM-73 modem.
This modem and it’s operational capabilities have become a defacto standard when operating
over DSCS satellites. All OM-73 modes listed in MIL-STD-188-165A are supported.

1.5 Data Interfaces

The SLM-5650 supports two native data interfaces as well as a option slot for an additional
modular data interface. The two native interfaces are TIA/EIA-530/422 and TIA/EIA-613
(HSSI). The option interface available at this time is the Gigabit Ethernet. The modem will
currently support only one interface at a time.

1–5

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

1.5.1 TIA/EIA-530

The TIA/EIA-530 interface supports the physical layer requirements for TIA/EIA-530. It also
supports the TIA/EIA-422 electrical interface specification. This interface operates in duplex
from 64 kbps to 20 Mbps.

1.5.2 TIA/EIA-613 (HSSI)

The TIA/EIA-613 interface supports the physical layer requirements for TIA/EIA-613. It also
supports the TIA/EIA-612 electrical interface specification. This interface operates in duplex
from 64 kbps to 51.84 Mbps.

1.5.3 Gigabit Ethernet

In the SLM-5650, the GBEI-5650 performs a simple bridge function and passes IP packets,
unaltered, in each direction between the LAN (10/100/1000Base-T interface) and WAN (SLM­5650 modulator/demodulator). IP packet traffic is framed via HDLC encapsulation by the GBE­5650 logic, and the GBEI-5650 is both the origination and termination point for HDLC
encapsulation. HDLC CRC-16 verification is performed on all received (from WAN) HDLC
frames.

1.6 Independent Tx and Rx Function

The Tx (modulator) and Rx (demodulator) sides of the modem are functionally independent and
separately controllable. The baseband Tx and Rx sides of a communications channel passing
through the modem are independently configurable, including the ability to select different
parameters (to include data rate, modulation, and coding) in support of asymmetrical operation.

Note: Data interfaces and IF interfaces are not independent.

Example: If the TIA/EIA-530 interface is selected DO NOT USE TIA/EIA-530 to transmit and
a HSSI interface to receive. The same principle applies to the IF interfaces if 70/140 is selected
DO NOT USE 70/140 to transmit and the L-Band interface to receive.

1–6

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

1.7 Interoperability

1.7.1 Interoperability with Legacy Modems

The modem is fully compatible and interoperable with all specified modes of operation of the
following legacy modems:

a. OM-73 (V)
b. MD-1352 (P)/U (BEM-7650)
c. MD-1340 (OM-73 interoperable mode only; orderwire not required)
d. MD-1030B

e. SLM-3650

f. SLM-8650

SLM-7650

g.

Note: The remote control protocol will not be backwards compatible.

1.7.2 Protection Switches

Redundancy switching is accommodated with the following protection switches.

Compatible Non-Compatible

CRS-300, 1:10 redundancy switch SMS-300
CRS-311, 1:1 redundancy switch SMS-450

SMS-7000

1–7

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

1.8 Summary of Specifications

Table 1-1. Summary of Specification

Parameter Specification

Operating Frequency Range 52 to 88, 104 to 176, 950 to 2000 MHz,

in 100 Hz steps
Modulation Types BPSK, QPSK, OQPSK, 8-PSK, 16-QAM
Digital Data Rates 64 kbps to 5 Mbps, in 1 bps steps (EIA-530, EIA-613)

64 kbps to 10 Mbps, in 1 bps steps (EIA-530, EIA-613)

64 kbps to 20 Mbps, in 1 bps steps (EIA-530, EIA-613)

64 kbps to 51.840 Mbps, in 1 bps steps (EIA-613)
Symbol Rate Range 32 KS/S TO 30 MS/S
EXT REF Input TNC Connector, 1, 5, or 10 MHz selectable
INT REF Stability 1 x 10-7
Scrambling V.35, OM-73, and Synchronous
IDR/IBS Framing Compatibility Support for IBS and IDR framing. Allows basic IBS/IDR Open

Network capable operation.
Built-in Test (BIT) Fault and status reporting, BER performance monitoring, IF

Loop-back, programmable test modes, built in Fireberd

emulation with all comprehensive BER measurements.
Summary Faults Reported via Front Panel LEDs, 9-pin D sub Alarm connector,

relay contacts for Tx, Rx, Common equipment faults, and Tx

and RX alarms. Open collector faults on the 15-pin D sub Aux

connector. Both data interfaces have open collector faults

available.
Monitor and Control EIA-485, EIA-232, 10/100 BASET Ethernet with HTTP, Telnet,

and SNMP.

Modulator Specification

Output Power +10 – 40 dBm, adjustable in 0.1 dB steps
Output Return Loss -14 dB (70/140 MHz)

-9 dB (L-Band)
Output Impedance
Spurious

Harmonics From Carrier (CW) to the greater of the 12th harmonic or

Tx Clock Source Rx, INT, Tx Terrestrial, and Data Source Sync
Output Connections TNC for 52 to 88, 104 to 176 MHz

Modulation Timing Jitter
Modulation Phase Error
Modulator Spectral Inversion Modem can invert the modulated spectrum
Transmit Clock and Data

Inversion

50 Ω
From Carrier

10 kHz bandwidth)

4000 MHz –60 dBc

Type N for 950 to 2000 MHz
< 3 % of the modulation symbol period.
< 2 °

Modem can invert the Tx clock and data independently of each
other. (EIA-530, EIA-613)

± TX SR TO 500 MHZ –51 dBc (measured in a

1–8

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

Table 1-1. System Specification (Continued)

Demodulator Specification

Input Power:

Desired Carrier

Maximum Composite
Input Impedance
Input Connectors TNC for 52 to 88, 104 to 176

Carrier Acquisition Range
Input Return Loss -14 dB (70/140 MHz)

Buffer Clock INT, Tx Terrestrial, Rx Satellite
Doppler Buffer 32 to 4,194,304 bits, selectable in bits or mSec

Coding Options

Uncoded 1/1
Viterbi K=7, 1/2, 3/4, and 7/8 rates
Viterbi + Reed-Solomon Closed Network, per IESS-308, and IESS-309
Trellis IESS-310
Trellis + Reed-Solomon IESS-310
Turbo Turbo Product Coding (TPC), per IESS-315

Open Network Options

IDR INTELSAT IESS-308 (Framing only)

IBS INTELSAT IESS-310 (Framing only)

+10 to –55 dBm
+20 dBm or +40 dBc

50 Ω

Type N for 950 to 2000 MHz

±

30 kHz, selectable

-9 dB (L-Band)

INTELSAT IESS-310 (Framing only)

INTELSAT IESS-309 (Framing only)

1–9

SLM-5650 Satellite Modem Revision 2
Introduction MN/SLM5650.IOM

1.8.1 Performance

1.8.2 Acquisition and Timing Performance Requirements

Note: The following reference Eb/No is defined as the required Eb/No corresponding to a
BER of IE-3 with R-S FEC not enabled.

Table 1-2. Acquisition and Timing Performance Requirements

Parameter Specification

Initial Acquisition

Reacquisition Reacquisition is achieved, as follows, after a period of up to 15 minutes of the

BCI With Tx and Rx random data, the mean time to loss of BCI due to falsely adding or

System Retention Synchronization and BCI are mainta ined for all Eb/N0 above the reference Eb/N0

Receive Timing Jitter
Doppler The modem meets the requirements with a Doppler shift, rate of change, and

The modem achieves initial acquisition within the times as specified within ± 30 kHz
at the reference Eb/No

• For baseband data rates between 64 kbps and ≤ 128 kbps, the maximum initial
acquisition time is 500 seconds.

• For Baseband data rates between 128kbps and ≤ 1544 kbps, the maximum
initial acquisition time is 30 seconds.

• For baseband data rates > 1544 kbps, the maximum initial acquisition time is

1.5 seconds.

absence of signal when the carrier returns to within 500 Hz of its original frequency.

• For baseband data rates between 64 kbps and 128 kbps, the maximum
reacquisition time shall be 45 seconds.

• For baseband data rates between 128 kbps and 1544 kbps, the maximum
reacquisition time shall be 20 seconds.

• For baseband data rates greater than 1544 kbps, the maximum reacquisition
time shall be 1 second.

deleting bits is at least 3 days at the reference E
maintains BCI over 50 consecutive bits of all ones or zeros, which occur no more than
once in 10,000 bits, without employing data scra mbl ing .

(BPSK/QPSK/OQPSK/8-PSK) for signal loss of up to 50 modulation symbol
periods, with a probability of at least 90 percent.

The Rx output clock peak timing jitter cannot exceed ± 5 percent at the reference
E

when the modulated signal meets the modulation timing jitter requirement.

b/N0

acceleration for satellite inclination up to ± 7° as presented in Table A-6, and an
additional 0.5 dB added to the reference E

b/N0

. In addition, the modem

b/N0

.

1–10