Comtech EF Data SDM-2020 User Manual
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Installation and Operation Manual
202
Satellite Modulato
Part Number MN/SDM2020M.IOM Revision 7
SDM-2020
Comtech EF Data is an ISO 9001
Registered Company.
Satellite Modulator
Installation and Operation Manual
Part Number MN/SDM2020M.IOM
Revision 7
June 30, 2002
Copyright © Comtech EF Data, 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.
SDM-2020 Satellite Modulator Revision 7
Preface MN/SDM-2020M.IOM
Customer Support
Contact the Comtech EFData Customer Support Department for:
• Product support or training
• Information on upgrading or returning a product
• Reporting comments or suggestions concerning manuals
A Customer Support representative may be reached at:
Comtech EFData
Attention: Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA
480.333.2200 (Main Comtech EFData Number)
480.333.4357 (Customer Support Desk)
480.333.2161 FAX
or, E-Mail can be sent to the Customer Support Department at:
service@comtechefdata.com
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
EFData Customer Support Department.
2. Be prepared to supply the Customer Support representative with the model
number, serial number, and a description of the problem.
3. To ensure that the product is not damaged during shipping, pack the product in its
original shipping carton/packaging.
4. Ship the product back to Comtech EF Data. (Shipping charges should be
prepaid.)
For more information regarding the warranty policies, see Warranty, p. xiv.
.
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Table of Contents
CHAPTER 1. INTRODUCTION .............................................................................................1–1
1.1 Overview ...................................................................................................................................... 1–1
1.2 Assemblies.................................................................................................................................... 1–4
CHAPTER 2. PRODUCT DATA SPECIFICATION ...............................................................2–1
2.1 Specifications ............................................................................................................................... 2–1
2.2 Dimensional Envelope ................................................................................................................ 2–6
CHAPTER 3. INSTALLATION ..............................................................................................3–1
3.1 Unpacking.................................................................................................................................... 3–1
3.2 Installation ................................................................................................................................... 3–4
CHAPTER 4. EXTERNAL CONNECTIONS .......................................................................... 4–1
4.1 External Connections.................................................................................................................. 4–1
4.2 Proper Operations for Emissions (CE) ..................................................................................... 4–5
CHAPTER 5. FRONT PANEL OPERATIONS ......................................................................5–1
5.1 Front Panel .................................................................................................................................. 5–1
5.2 LED Indications .......................................................................................................................... 5–2
5.3
Front Panel Keypad.................................................................................................................... 5–3
5.4 Menu System ...............................................................................................................................5–4
5.5 Menu Tree.................................................................................................................................... 5–6
Openning Screen ......................................................................................................................... 5–7
5.6
5.7 Initial Default Setting ...............................................................................................................5–49
5.8
Revision Emulation Operation ................................................................................................5–50
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CHAPTER 6. DATA INTERFACES.......................................................................................6–1
CHAPTER 7. RS-422 PARAELLEL/SERIAL INTERFACE ..................................................7–1
CHAPTER 8. LOW VOLTAGE DIFFERENTIAL SIGNAL (LVDS)........................................8–1
CHAPTER 9. ASI/RS-422 DATA INTERFACE .....................................................................9–1
CHAPTER 10. ECL/HSSI DATA INTERFACE...................................................................... 10–1
CHAPTER 11. G.703 DATA INTERFACE ............................................................................11–1
CHAPTER 12. SMPTE-310 DATA INTERFACE................................................................... 12–1
CHAPTER 13. ASI/LVDS DATA INTERFACE...................................................................... 13–1
CHAPTER 14. FULLY ACCESSIBLE SYSTEM TOPOLOGY (FAST) OPTIONS ................ 14–1
APPENDIX A. REMOTE CONTROL SPECIFICATIONS....................................................... A–1
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Figures
Figure 1-1. Modulator Block Diagram ................................................................................................ 1–1
Figure 2-1. Dimensional Envelope of Units Prior to September 1, 1999 ............................................ 2–6
Figure 2-2. Diemensional View for Units with Improved Chassis...................................................... 2–7
Figure 3-1. Installation of the Optional Mounting Bracket, KT/6228-1.............................................. 3–3
Figure 3-2. Rear View of SDM-2020M Rack Installed ........................................................................ 3–4
Figure 3-3. Typical Data Interface Module.......................................................................................... 3–5
Figure 4-1. Rear Panel ......................................................................................................................... 4–1
Figure 5-1. Front Panel View............................................................................................................... 5–1
Figure 5-2. Keypad .............................................................................................................................. 5–3
Figure 5-3. SDM-2020 Modulator Menu Tree..................................................................................... 5–6
Figure 6-1. 204 Byte Parallel Format................................................................................................... 6–2
Figure 6-2. 204 Byte Serial Format ..................................................................................................... 6–2
Figure 7-1. RS-422 Interface Module PCB ......................................................................................... 7–3
Figure 8-1. LVDS Interface Module PCB ........................................................................................... 8–3
Figure 9-1. ASI/RS-422 Interface Block Diagram .............................................................................. 9–2
Figure 9-2. ASI Module Assembly ...................................................................................................... 9–2
Figure 10-1. 187 Byte (No framing) Serial Format ...........................................................................10–4
Figure 10-2. 188 Byte Serial Format ................................................................................................. 10–4
Figure 10-3. 204 Byte Serial Format ................................................................................................. 10–4
Figure 10-4. 204 Byte DBS Serial Format.......................................................................................... 10-5
Figure 10-5. ECL/HSSI Connector, Pin Locator ............................................................................... 10–7
Figure 10-6. Nominal Interface Timing........................................................................................... 10–10
Figure 10-7. Interface Timing.......................................................................................................... 10–10
Figure 11-1. G.703 Interface Block Diagram .................................................................................... 11–2
Figure 11-2. G.703 Interface Assembly (PCB).................................................................................. 11–3
Figure 11-3. Co-Located Modulator and Demodulator .....................................................................11–9
Figure 12-1. SMPTE-310M Interface Block Diagram ...................................................................... 12–2
Figure 12-2. Module Assembly, Part No. AS/6175-2........................................................................ 12–3
Figure 13-1. ASI/LVDS Interface Block Diagram ............................................................................ 13–2
Figure 13-2. ASI/LVDS Jumper Selection ........................................................................................ 13–5
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Tables
Table 1-1. Minimum/Mximum Data and Symbol Rates...................................................................... 1–3
Table 1-2. Comtech EF Data Module Part Numbers ........................................................................... 1–4
Table 1-3. Comtech EF Data Part Numbers for Data Interface Modules ............................................ 1–5
Table 2-1. General Specifications........................................................................................................ 2–1
Table 2-2. Environmental and Physical Specifications........................................................................ 2–3
Table 2-3. Modulator Specifications.................................................................................................... 2–4
Table 4-1. Rear Panel Connectors........................................................................................................ 4–1
Table 4-2. Remote Control Connector Pinout (J1) .............................................................................. 4–2
Table 4-3. Faults Status Relays Connector Pinout (J2)........................................................................ 4–3
Table 5-1. LED Indicators ................................................................................................................... 5–2
Table 5-2. Revision Emulation .......................................................................................................... 5–50
Table 6-1. Minimum Software Requirements...................................................................................... 6–1
Table 6-2. 204 Data and Timing .......................................................................................................... 6–3
Table 7-1. RS-422 Interface Specifications ......................................................................................... 7–2
Table 7-2. DVB Interface Connector Pinout (J3) ................................................................................ 7–5
Table 7-3. EIA-530 Serial Interface Connector Pinout (J4) ................................................................ 7–6
Table 7-4. Auxiliary Connector Pinout (J5)......................................................................................... 7–7
Table 8-1. LVDS Specifications .......................................................................................................... 8–2
Table 8-2. DVB Interface Connector Pinout, J3 RX Out (Demodulator Only)................................... 8–5
Table 8-3. DVB Interface Connector Pinout, J4 TX IN ...................................................................... 8–6
Table 8-4. Auxiliary Connector Pinout................................................................................................ 8–7
Table 9-1. ASI/RS-422 Specifications................................................................................................. 9–3
Table 9-2. RS-422 Connector Pinout (Per EIA-530), J5 ..................................................................... 9–5
Table 10-1. Framing Format Summary...............................................................................................10-2
Table 10-2. Terrestrial Transport Protocols........................................................................................ 10–3
Table 10-3. HSSI/EIA-613 Interface Connector Pinout (J3) ............................................................. 10–5
Table 10-4. Definition of Signals....................................................................................................... 10–8
Table 10-5. HSSI General Specifications .......................................................................................... 10–9
Table 10-6. Transmit Timing Parameters ........................................................................................ 10–11
Table 10-7. Receive Timing Parameters.......................................................................................... 10–11
Table 10-8. Signal Definition............................................................................................................10-12
Table 10-9. Fault Signal Definitions................................................................................................ 10–13
Table 11-1. G.703 Applicable Documents......................................................................................... 11–4
Table 11-2. Specifications Summary ................................................................................................. 11–5
Table 11-3. Auxiliary Connector, J5................................................................................................ 11–11
Table 12-1. Specification Summary................................................................................................... 12–1
Table 12-2. Auxiliary Interface Connector, J5................................................................................... 12–6
Table 13-1. ASI/LVDS Specifications............................................................................................... 13–3
Table 13-2. Modulator/Demodulator Jumper Selection..................................................................... 13–6
Table 13-3. LoopBack Connections....................................................................................................13-7
Table 13-4. Auxiliary Connector Pinout (J5)...................................................................................... 13–9
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About this Manual
This manual describes the operation and maintenance of the Comtech EF Data
SDM-2020 Satellite Modulator. This is a technical document intended for earth station
engineers, technicians, and operators responsible for the operation and maintenance of
the Comtech EF Data SDM-2020 Satellite Modulator.
Related Documents
Comtech EF Data Specification, SP/5611 SDM-2020 Satellite Modulator
Conventions and References
Cautions and Warnings
CAUTION indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury. CAUTION may also be used to indicate other
CAUTION
unsafe practices or risks of property damage.
WARNING indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
WARN ING
IMPORTANT indicates a statement that is associated with the task
IMPORTANT
being performed. .
Metric Conversion
Metric conversion information is located on the inside back cover of this manual. This
information is provided to assist the operator in cross-referencing English to Metric
conversions.
Recommended Standard Designations
Recommended Standard (RS) Designations have been superseded by the new designation
of the Electronic Industries Association (EIA). References to the old designations are
shown only when depicting actual text displayed on the screen of the unit (RS-232, RS485, etc.). All other references in the manual will be shown with the EIA designations
(EIA-232, EIA-485, etc.) only.
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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 Technical
Publications Department: techpub@comtechefdata.com
Overview of Changes to Previous Edition
Changes made to Rev. 6 are as follows:
Revised manual format to comply with the current Comtech EF Data standards.
Chapter 5: Front Panel Operation – Revisied the chapter to include version 9.1.2. Revised
Table 5-2 to include version 9.1.2, FW/5613-1AG.
Chapter 14: FAST – Updated procedures to comply with customer support requirements.
Appendix A – Updated remote control operation to include FW.5613-1AG and FW/56132AG.
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Electrical Safety
The SNM-1010L 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 100 - 240 volts AC. It has a
maximum power consumption of 40 watts, and draws a maximum of 400 mA.
Observe the following instructions:
Fuses
The SNM-1010L is fitted with two fuses - one each for line and neutral connections.
These are contained within the body of the IEC power inlet connector, behind a small
plastic flap.
• For 230 volt AC operation, use T0.75A, 20mm fuses.
• For 115 volt AC operation, use T1.25A fuses, 20mm fuses.
FOR CONTINUED OPERATOR SAFETY,
ALWAYS REPLACE THE FUSES WITH THE CORRECT TYPE AND RATING.
Environmental
The SDM-2020 Satellite Modulator must not be operated in an environment where the
unit is exposed to extremes of temperature outside the ambient range 0 to 50°C (32 to
122°F), precipitation, condensation, or humid atmospheres above 95% RH, altitudes (unpressurised) 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.
Installation
The installation and connection to the line supply must be made in compliance to local or
national wiring codes and regulations.
The SDM-2020 Satellite Modulator is designed for connection to a power system that has
separate ground, line and neutral conductors. The equipment is not designed for
connection to power system that has no direct connection to ground.
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The SDM-2020 Satellite Modulator is shipped with a line inlet cable suitable for use in
the country of operation. If it is necessary to replace this cable, ensure the replacement
has an equivalent specification.
Examples of acceptable ratings for the cable include HAR, BASEC and HOXXX-X.
Examples of acceptable connector ratings include VDE, NF-USE, UL, CSA, OVE,
CEBEC, NEMKO, DEMKO, BS1636A, BSI, SETI, IMQ, KEMA-KEUR and SEV.
International Symbols:
Symbol Definition Symbol Definition
~
Alternating Current
Fuse
Telecommunications Terminal Equipment Directive
In accordance with the Telecommunications Terminal Equipment Directive 91/263/EEC,
this equipment should not be directly connected to the Public Telecommunications
Network.
EMC (Electromagnetic Compatibility)
In accordance with European Directive 89/336/EEC, the SNM-1010L Modem has been
shown, by independent testing, to comply with the following standards:
Emissions: EN 55022 Class B - Limits and methods of measurement of radio
interference characteristics of Information Technology Equipment.
(Also tested to FCC Part 15 Class B)
Immunity: EN 50082 Part 1 - Generic immunity standard, Part 1: Domestic,
commercial and light industrial environment.
Protective Earth
Chassis Ground
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Additionally, the SDM-2020 Satellite Modulator has been shown to comply with the
following standards:
EN 61000-3-2 Harmonic Currents Emission
EN 61000-3-3 Voltage Fluctuations and Flicker
EN 61000-4-2 ESD Immunity
EN 61000-4-4 EFT Burst Immunity
EN 61000-4-5 Surge Immunity
EN 61000-4-6 RF Conducted Immunity
EN 61000-4-8 Power frequency Magnetic Field Immunity
EN 61000-4-9 Pulse Magnetic Field Immunity
EN 61000-4-11 Voltage Dips, Interruptions, and Variations Immunity
EN 61000-4-13 Immunity to Harmonics
In order that the Modem continues to comply with these standards, observe
the following instructions:
IMPORTANT
• Connections to the transmit and receive IF ports (BNC female connectors) should
be made using a good quality coaxial cable - for example RG58/U (50 Ω or
RG59/U (75 Ω).
• All 'D' type connectors attached to the rear panel must have back-shells that
provide continuous metallic shielding. Cable with a continuous outer shield
(either foil or braid, or both) must be used, and the shield must be bonded to the
back-shell.
• The equipment must be operated with its cover on at all times. If it becomes
necessary to remove the cover, the user should ensure that the cover is correctly
re-fitted before normal operation commences
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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.
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Warranty Policy
This Comtech EF Data product is warranted against defects in material and workmanship
for a period of two 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-touse guide to your equipment. All statements, technical information, and
recommendations in this manual and in any guides or related documents are believed
reliable, but the accuracy and completeness thereof are not guaranteed or warranted, and
they are not intended to be, nor should they be understood to be, representations or
warranties concerning the products described. Further, Comtech 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 Network Customer Support Department.
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xiv
SDM-2020
R
X
Satellite
Modulator
1.1 OVERVIEW
The SDM-2020 is a programmable, variable-rate satellite modulator used for digital
video and high-speed data applications. The modulator supports open network modes
compliant with the ETSI EN 300 421
Broadcasting (DVB) by satellite.
Chapter 1. INTRODUCTION
/prEN 301 210 specification for Digital Video
A general block diagram for the modulator is shown in Figure 1-1.
DATA FILTER
AND
MODULATOR
SYNTHESIZERM&C
T
IF
USER
INTERFACE
PLUG-IN
DATA
INTERFACE
REMOTE PORT
AND FAULTS
SYNCH
AND
RANDOMIZE
RS CODER
AND
INTERLEAVER
VITERBI CODER
AND
MAPPING
TO/FROM
SYNCH AND RANDOMIZE
RS CODER AND INTERLEAVER
VITERBI CODER AND MAPPI NG
DATA FILTER AND MODULATOR
SYNTHESIZE
Figure 1-1. Modulator Block Diagram
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Introduction MN/SDM2020M.IOM
The modulator utilizes a plug-in data interface module installed in the rear of the chassis.
The data interface module provides flexible adaptation to the various physical and
electrical interfaces found in the communications industry.
The modulator utilizes Fully Accessible System Topology (FAST), Comtech EF Data’s
new feature for immediate implementation of different options through the user interface
keypad. FAST enable on-location upgrades of the operating feature set—in the rack—
without removing a unit from the setup. This feature employs a unique access code to
enable configuration of the available hardware. The access code can be purchased at any
time from Comtech EF Data. Once obtained, the access code is entered into the unit
through the front panel keypad or the rear remote port. When service requirements
change, the modulator can be upgraded to meet the new requirements within minutes
after confirmation by Comtech EF Data.
The data rate of the modulator is programmable from 1.5 to 100 Mbit/s depending upon
the data interface and the maximum symbol rate is 37.5 Msym/s. The minimum symbol
rate is limited by the minimum 1.5 Mbit/s data rate. Modulation formats include QPSK,
8PSK, and 16QAM. Operation is based upon the DVB/DBS standard for QPSK and
8PSK.
Table 1-1 lists the minimum and maximum data and symbol rates for each code rate. See
the specifications section for the maximum data rate limits by framing types.
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Introduction MN/SDM2020M.IOM
Table 1-1. Minimum/Maximum Data and Symbol Rates
Code Rate
QPSK 1/2 188 1,500,000 34,558,823 1,627,659 37,500,000
QPSK 2/3 188 1,500,000 46,078,431 1,220,744 37,500,000
QPSK 3/4 188 1,500,000 51,838,235 1,085,106 37,500,000
QPSK 5/6 188 1,500,000 57,598,039 976,595 37,500,000
QPSK 7/8 188 1,500,000 60,477,941 930,091 37,500,000
8PSK 2/3 188 1,500,000 69,117,647 813,829 37,500,000
8PSK 5/6 188 1,500,000 86,397,059 651,063 37,500,000
8PSK 8/9 188 1,500,000 92,156,863 610,372 37,500,000
16QAM 3/4 188 1,500,000 92,156,863 542,553 33,333,333
16QAM 7/8 188 1,500,000 92,156,863 465,045 28,571,428
QPSK 1/2 204 1,500,000 37,500,000 1,500,000 37,500,000
QPSK 2/3 204 1,500,000 50,000,000 1,125,000 37,500,000
QPSK 3/4 204 1,500,000 56,250,000 1,000,000 37,500,000
QPSK 5/6 204 1,500,000 62,500,000 900,000 37,500,000
QPSK 7/8 204 1,500,000 65,625,000 857,142 37,500,000
8PSK 2/3 204 1,500,000 75,000,000 750,000 37,500,000
8PSK 5/6 204 1,500,000 93,750,000 600,000 37,500,000
8PSK 8/9 204 1,500,000 100,000,000 562,500 37,500,000
16QAM 3/4 204 1,500,000 100,000,000 500,000 33,333,333
16QAM 7/8 204 1,500,000 100,000,000 428,571 28,571,428
QPSK 1/2 None (187) 1,500,000 34,375,000 1,636,363 37,500,000
QPSK 2/3 None (187) 1,500,000 45,833,333 1,227,272 37,500,000
QPSK 3/4 None (187) 1,500,000 51,562,500 1,090,909 37,500,000
QPSK 5/6 None (187) 1,500,000 57,291,667 981,818 37,500,000
QPSK 7/8 None (187) 1,500,000 60,156,250 935,064 37,500,000
8PSK 2/3 None (187) 1,500,000 68,750,000 818,181 37,500,000
8PSK 5/6 None (187) 1,500,000 85,937,500 654,545 37,500,000
8PSK 8/9 None (187) 1,500,000 91,666,667 913,636 37,500,000
16QAM 3/4 None (187) 1,500,000 91,666,667 545,454 33,333,333
16QAM 7/8 None (187) 1,500,000 91,666,667 467,532 28,571,428
Framing
Type
Minimum
Data Rate
(bps)
Maximum
Data Rate
(bps)
Minimum
Symbol Rate
(sym/s)
Maximum
Symbol Rate
(sym/s)
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Introduction MN/SDM2020M.IOM
The modulator incorporates concatenated error correction coding for improved signal
quality. With concatenated coding, an outer Reed-Solomon Codec is used in tandem with
an inner Viterbi or trellis-type Codec. The Reed-Solomon coding is DVB (based on 204,
188, t=8 type code), while the Viterbi and trellis codes are based upon a constraint length
K = 7 convolutional coding. This combination significantly reduces the required
operating power of the satellite system.
The modulator is a complete, self-contained unit in a standard, one-unit (1U) 19-inch
(48.26 cm) rack-mountable enclosure. It includes a backlit LCD display and a standard
Comtech EF Data 6-button keypad for user control.
A status and control port (available through a 9-pin D connector at the rear of the chassis)
provides either serial EIA-232 or EIA-485 for remote control applications. A second rearpanel 9-pin D connector provides fault/alarm status.
The unit is designed to meet stringent safety and RF emissions standards, including CE
Mark certification.
1.2 ASSEMBLIES
1.2.1
MODULATOR
The modulator consists of the assemblies listed in Table 1-2.
Table 1-2. Comtech EF Data Module Part Numbers
Part Number Description
PL/8200-1 SDM-2020 Top Assembly
PL/3995-39
PL/5612 Modulator Assembly
PL/3995-40
KT/8200 Chassis Assembly
IF Module, 75Ω
IF Module, 50Ω
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Introduction MN/SDM2020M.IOM
1.2.2 DATA INTERFACES
Data interface assemblies are listed in Table 1-3.
Table 1-3. Comtech EF Data Part Numbers for Data Interface Modules
Part Number Description
PL/5805 RS422 Data Serial/Parallel Data Interface
PL/5806-2 ECL/HSSI Serial Data Interface (For TX only)
PL/5807 ASI/RS422 (Asynchronous Serial Interface and Serial Data Interface)
PL/5814 LVDS-DVB Serial/Parallel Data Interface
PL/6168 G.703 Data Interface
PL/6175-2 SMPTE 310M Data Interface
PL/8160 ASI/LVDS Interface
The data interface is a plug-in module. As new interfaces are developed, the related
information will be added to this manual. All data interfaces are safety rated to SELV
(IEC 950, Paragraph 1.2.8.5).
For additional data interface availability, contact Comtech EF Data Customer Support.
1.2.3 FAST OPTIONS
Certain options are enabled using Comtech EF Data’s FAST feature. The software and
other requirements for the FAST options are also listed in this appendix. Options include:
• 8PSK
• 16QAM
• Original Equipment Manufacture “Liquid Crystal Display” (OEM
LCD)
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1-6
Chapter 2. SPECIFICATIONS
2.1 SPECIFICATIONS
2.1.1 GENERAL SPECIFICATION
Table 2-1. General Specifications
Parameter Specification
Transmission Format QPSK per EN 300 421
8PSK per prEN 301 210, optional
16QAM per prEN 301 210, optional
Data Rate/Symbol Rate 1.5 to 100 Mbit/s, in 1 bit/s steps, depending upon symbol rate and data interface.
Refer to Chapter 1 for the appropriate Data Rate.
Equivalent Serial Data Rate at
96 pin DIN
Framing 187
188
204
Data Rate Tolerance
Modulation Type and Inner
Code Rate
Outer Code Rate
(Reed-Solomon)
Interleaving Depth 12, per EN 300 421 and prEN 301 210
Spectral Shaping
Framing
Data Rate = SR x m x CRv x (187/204), ≤ 100 Mbit/s
Data Rate = SR x m x CRv x (188/204), ≤ 100 Mbit/s
Data Rate = SR x m x CRv x (204/204), ≤ 100 Mbit/s
m = 2 QPSK, 3 8PSK, 4 16QAM
CRv = Viterbi/trellis code rate
CRrs = Reed-Solomon code rate
Programmed rate ± 100 ppm
QPSK: 1/2, 2/3, 3/4, 5/6, 7/8
8PSK: 2/3, 5/6, 8/9
16QAM: 3/4, 7/8
RS (204, 188, t = 8)
Square-root raised cosine, α = 0.35 per EN 300 421 and prEN 301 210
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SDM-2020 Satellite Modulator Revision 7
Product Data Specification MN/SDM2020M.IOM
Table 2-1. General Specifications (Continued)
Parameter Specification
Energy
Dispersal
Spectral Sense Normal or Inverted
Front Panel
Interface
M&C Interface Programmable selection for EIA-232, 2-wire EIA-485 or 4-wire EIA-485, 9-pin D female connector,
Fault/Alarm
Interface
Status Relays
Max. Current
Voltage
Unit Cooling Exhaust fan located on the left of the unit when viewed from the rear.
Rated AC
Power Input
Power
Distribution
System
EN 300 421 and prEN 301 210 , or None
Keypad + LCD with back lighting
serial, ASYNC
Form C, 9-pin D, female connector
TX Fault, TX Alarm, Common Equipment
< 30 VAC, 42.4 Vpk-pk, or 60 VAC
100 to 240 VAC, 50 to 60 Hz; 1.0A at 100 VAC or 0.5A at 240 VAC. Connection universal type IEC
320.
40W typical, 65W maximum.
Note: This equipment is fitted with a wide-ranging power supply that will operate at +6% to –10% of
the rated voltage range.
IEC 950, Paragraph 1.6.5.
Type TN only (EN 60950 Paragraph 1.2.12.1).
Note: The equipment shall not be used with single-phase three-wire and PE.
Connection to
Supply
Power Supply
Fuses
Class of
Equipment
Power Supply
Hold-up
DC Power
Input optional
CE
Compliance
Pluggable equipment Type A (EN 60950, Paragraph 1.2.5).
Note: Equipment which is intended for connection to the building power supply wiring via a
nonindustrial plug and socket outlet or a nonindustrial appliance coupler or both.
Double pole fused.
Fuse type 20mm 2A T-type HBC (T2A H250V)
(IEC 127, Sheet V, approved and UL recognized)
Class 1 Equipment (EN60950, Paragraph 1.2.4): electric shock protection by basic insulation and
protective earth.
16 ms minimum at 120 VAC
78 ms minimum at 240 VAC
42 to 56 VDC. 40W typical, 65W maximum.
Required
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SDM-2020 Satellite Modulator Revision 7
Product Data Specification MN/SDM2020M.IOM
2.1.2 ENVIRONMENTAL AND PHYSICAL SPECIFICATION
Table 2-2. Environmental and Physical Specifications
Parameter Specification
Physical:
Size
Weight
Environmental:
Temperature
Humidity
1 U rack mount, IEC 297, DIN41494 Type.
19W x 1.75H x 14D inch
(48.26W x 4.44H x 35.56D cm)
< 15 lbs. (< 7.0 kg.)
0 to +50°C (32 to 122°F), Operating
-40 to +70°C (-40 to 158°F), Storage
< 95%, non-condensing
Note: Power supply has an operating range of 85 to 264 VAC, 47 to 63 Hz,
universal type per manufacturer’s published data sheet.
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SDM-2020 Satellite Modulator Revision 7
Product Data Specification MN/SDM2020M.IOM
2.1.3 MODULATOR SPECIFICATIONS
Table 2-3. Modulator Specifications
Modulator Characteristics
TX IF Output 50 to 90 and 100 to 180 MHz, 2.5 kHz steps
-20 to +5 dBm in 0.1 dB steps
(± 0.5 dB accuracy over operating temperature range)
TX IF Impedance
Optional TX IF Impedance
IF Output Connector BNC, female
TX Spurious:
Modulated Carrier
TX Spurious:
Unmodulated Carrier
TX Carrier Isolation -60 dBm maximum when TX carrier = OFF
AC Line Spurious -36 dBc maximum
IF and Data Frequency Stability
TX Carrier Phase Noise
(Single Sideband)
-66 100 Hz
-76 1 kHz
-86 10 kHz
75Ω, 18 dB return loss minimum
50Ω, 18 dB return loss minimum
-55 dBc minimum in a 4 kHz bandwidth relative to unmodulated carrier power for
all modulated carrier power levels. The measurement bandwidth is 5 to 500 MHz
excluding ± 1.4 times the symbol rate about the carrier frequency.
-55 dBc minimum in a 4 kHz bandwidth, TX power level is
≤ -5 dBm. The measurement bandwidth is 5 to 500 MHz.
± 10 ppm
Max dBc/Hz
Offset from Carrier Frequency
-96 100 kHz
-96 1 MHz
Amplitude and Phase Imbalance
Carrier Null (Suppression) 30 dB, minimum
Sideband Suppression 30 dB minimum, when generating a single side band
Group Delay 4 ns peak-to peak maximum to 18.75 MHz, within EN 300 421 and prEN 301 210
I/Q Delay Matching 0.5 ns difference maximum to 18.75 MHz.
Jitter Tolerance Main Card Meets ITU-T G.823 (3/93) and ITU-T G.824 (3/93)
Jitter Transfer
2-4
± 0.2 dB, maximum
± 2°, maximum
carrier (Offset Mode)
except T1 (1.544 Mbit/s) and E1 (2.048 Mbit/s), which requires a G.703 data interface.
< 0.5 dB peaking up to the cutoff frequency, -20 dB per decade beyond cutoff.
Nominal 3 dB cutoff is 10 Hz except E3 (34.368 Mbit/s), which is 100 Hz.
SDM-2020 Satellite Modulator Revision 7
Product Data Specification MN/SDM2020M.IOM
Table 2-4. Modulator Specifications (Continued)
Monitor & Control Characteristics
Asynchronous Serial Interface EIA-485 (2-/4-wire), or EIA-232
Baud Rate 300, 600, 1200, 2400, 4800, 9600, or 19200 bps
Serial Format ASCII
Data Bits 7 bits with odd/even parity
8 bits with no parity
Stop Bits 2
Parity Odd, Even, or None
Remote Port Addressing Range: 1 to 255
Controlled Items:
Data
Modulation, Coding Modulation Type: QPSK, 8PSK, 16QAM
Carrier TX IF Frequency
Test (Where Applicable) Pure Carrier
General Date and Time
Status All other configuration items
Faults Loss of Clock, or Out of Tolerance
Configuration Retention Non-volatile
Store Configurations 10 stored with recall.
Data Rate
Symbol Rate
Energy Dispersal (Scrambler) On/Off (Test Mode)
Differential Encoder (On/Off)
Framing Type (None, 188, 204)
Clock and Data Phase (Normal/Inverted)
Code Rate (Viterbi/trellis)
Spectral Mask, DVB
TX Output (On/Off)
TX Output Power Level
Spectral Inversion: Normal/Inverted
Dual Carrier (Carrier Null)
Offset Carrier (Single Sideband)
Data Loopback (Where Applicable)
LED Test
Scrambler (On/Off)
Reset
2047 Pattern (into payload)
Data Loopback
Software/Firmware Version and Unit Identification
Display Contrast
Data Stable, all 1s (AIS), or all 0s
Loss of Synchronization
IF Synthesizers
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SDM-2020 Satellite Modulator Revision 7
14.0
Product Data Specification MN/SDM2020M.IOM
2.2 DIMENSIONAL ENVELOPE
Refer to Figure 2-1 for modulator dimensional measurements. All dimensions are listed
in inches, centimeters are shown in parentheses.
19.0
(48.26)
1.75
(4.45)
(35.56)
1.25
(3.18)
Table 2-5. Dimensional Envelope of Units Prior to September 1, 1999
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SDM-2020 Satellite Modulator Revision 7
Product Data Specification MN/SDM2020M.IOM
As of September 1, 1999, SDM-2020 Modulator production units will incorporate a new and EMI
improved chassis. The new chassis is longer and includes the new Comtech EF Data logo. All
units returning from the field may have the new chassis installed if warranted by the repair. See
Figure 2-2.
1.70 [4.32]
SDM-2020
TRANSMI T STORED
RANSMIT TRANSMITTER O N
SYNC
TESTMODE
POWERON
16.12 [40.94]
1.25 [3.18]
Table 2-6. Dimensional View for Units with Improved Chassis
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SDM-2020 Satellite Modulator Revision 7
Product Data Specification MN/SDM2020M.IOM
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