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

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

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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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.

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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SDM-2020

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

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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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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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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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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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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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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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.

2-3

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

2-7

SDM-2020 Satellite Modulator Revision 7 Product Data Specification MN/SDM2020M.IOM

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2-8

The equipment contains parts and assemblies sensitive to damage by Electrostatic Discharge (ESD). Use ESD precautionary

CAUTION

procedures when touching, removing, or inserting PCBs.

3.1 UNPACKING

The modulator and manual are packaged in pre-formed, reusable, cardboard cartons containing foam spacing for maximum shipping protection.

Do not use any cutting tool that will extend more than 1 inch (2.54 cm) into the container. This can cause damage to the

CAUTION

To remove the modulator:

modulator.

Chapter 3. INSTALLATION

Cut the tape at the top of the carton indicated by OPEN THIS END

Remove the cardboard/foam space covering the modulator

Remove the modulator, manual, and power cord from the carton

Save the packing material for storage or reshipment purposes

Inspect the equipment for any possible damage incurred during shipment

Check the equipment against the packing list to ensure the shipment is correct

Refer to Section 3.2 for installation instructions

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SDM-2020 Satellite Modulator Revision 7 Installation MN/SDM2020M.IOM

3.2 INSTALLATION

A complete modulator consists of the SDM-2020 main unit and an optional plug-in data interface. The modulator is shipped with the data interface installed in the unit. Changing a data interface is easily accomplished in the field and does not require disassembly of the main unit.

Refer to applicable chapters for information on removing and installing data interface modules.

Install the modulator as follows:

Optional: Install the mounting bracket in equipment rack (Figure 3-1). Install and

tighten the bracket bolts.

Loosen the screw with flat washer located on the left-side of modem chassis.

Mount the modem chassis into the equipment rack and slide the screw with flat washer through the slot of the mounting bracket. Tighten the screw sufficiently to allow the modem chassis to slide in the bracket.

Connect the cables to the proper locations on the rear panel.

Observe the modulator. The modulator powers ON automatically when the

primary power connection is made (plugged in). Before plugging in the modulator, become familiar with the front panel operation as described in Chapter 5.

Note: If there is any problem with the installation, contact Comtech EF Data’s Customer Support Department: service@comtechefdata.com

3-2

SDM-2020 Satellite Modulator Revision 7

Installation MN/SDM2020M.IOM

Equipment

Rack

Mounting

Rail

#10 Socket head

screw

BRACKET

BOLTS

Support

Bracket

* Note: Components of mounting kit KT/6228-1

Figure 3-1. Installation of the Optional Mounting Bracket, KT/6228-1

3-3

SDM-2020 Satellite Modulator Revision 7 Installation MN/SDM2020M.IOM

3.2.1 CABLING

The following cabling instructions are generic. Comtech EF Data realizes there are several different cabling applications for the SDM- 2020

IMPORTANT

Modulator, however, this manual cannot illustrate or described the various installation configurations.

Back of Rack

J1 J2

100-240V~

1.5A 50-60Hz

T2A, 250V

ECL / HSSI INTERFACE

J21J21

M O N I

RF 1

T O R

Lengend

Up Converter

Router

Figure 3-2. Rear View of SDM-2020M Rack Installed

Item # Cable From To Comment

1 Prime Power Cord I.E.C Rack Power Source 3-Pong Power Cord 2 Remote J1 EXT PC Terminal 9-pin D 3 Fault J2 EXT PC Terminal 9-pin D 4

Data Interface, Customer Select Interface

5 IF Output CP1

6 Ground #10-32 Stud Rack Equipment

JX SERIAL JX PARALLEL JX AUX

Cissco router or equivalent

Upconverter or RF Terminal

Refer to Chapter 6 Data Interfaces

BNC

Prime Power Cord Remote Ribbon Cable Fault Cable Data Interface IF Output

Ground

3-4

SDM-2020 Satellite Modulator Revision 7 Installation MN/SDM2020M.IOM

3.2.2 DATA INTERFACES

The data interface is a removable, plug-in module that provides a terrestrial connection to the modulator. An interface consists of a Printed Circuit Board (PCB) attached to a faceplate. The faceplate contains connectors appropriate for the interface type, and two captive mounting screws.

Appendix C describe the various data interfaces. After a different interface type has been installed, the modulator recognizes the change upon power up, and defaults to valid parameters for the new interface.

To avoid damaging the modulator, always disconnect the power before removing or installing a data interface.

CAUTION

Figure 3-3 is an example of a typical data interface.

J3 PARALLEL J4 SERIAL J5 AUX

Figure 3-3. Typical Data Interface Module

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SDM-2020 Satellite Modulator Revision 7 Installation MN/SDM2020M.IOM

3.2.2.1 DATA INTERFACE REMOVAL

Disconnect power from the modulator.

Use a Phillips screwdriver to loosen the two captive screws on the faceplate of the data interface.

Grasp the data interface by the faceplate handle.

Carefully pull the data interface out of the slot.

3.2.2.2 DATA INTERFACE INSTALLATION

Disconnect power from the modulator.

Grasp the data interface by the faceplate handle.

Locate the opening at the rear of the modulator.

Carefully align the data interface with the card guides inside the modulator and

insert the data interface into the opening.

Push the data interface firmly into the slot, ensuring a good connection.

Align the captive screws located on the faceplate with the holes on the modulator

rear panel.

Use a Phillips screwdriver to tighten the screws.

3-6

Chapter 4. EXTERNAL CONNECTIONS

4.1 EXTERNAL CONNECTIONS

The connectors for the main unit are shown in Figure 4-1 and identified in Table 4-1. The connectors for each plug-in data interface are described in their applicable chapters.

PRIME POWER

GROUND

FUSE HOLDER

Remote J1 9-pin D Female Remote control (M&C)

Fault J2 9-pin D Female Faults status relays

IF Output CP1 BNC-Female Transmit IF output

Prime Power I.E.C Standard AC Power Input

GND None #10-32 Stud Chassis Ground

Data Interface Connectors See applicable chapter.

J1 REMOTE

Name Ref. Desig. Type Function

J2 FAULT

Figure 4-1. Rear Panel

Table 4-1. Rear Panel Connectors

DATA INTERFACE CONNECTIONS CP1 TX-IF

SDM-2020 Satellite Modulator Revision 7 External Connections MN/SDM2020M.IOM

4.1.1 REMOTE CONNECTOR AND PINOUT (J1)

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

The remote connector provides a means for issuing commands and determining the unit status. This connector provides EIA-232, EIA-485 (2-wire), and EIA-485 (4-wire) operation. The communications protocol and the control and status commands are described in Appendix A.

Table 4-2. Remote Control Connector Pinout (J1)

Remote Control Connector (J1) Pinout

EIA-232C EIA-485 (2) EIA-485 (4)

Signal Type Signal Type Signal Type Pin #s

GND GND GND GND GND GND 1

RXD O N/A N/A N/A N/A 2

TXD I N/A N/A N/A N/A 3

N/A N/A +RX/+TX I/O +TX I 4

GND GND -RX/-TX I/O -TX I 5

DSR O N/A N/A N/A N/A 6

RTS I N/A N/A N/A N/A 7

CTS O +RX/+TX I/O +RX O 8

N/A N/A -RX/-TX I/O -RX O 9

4-2

SDM-2020 Satellite Modulator Revision 7 External Connections MN/SDM2020M.IOM

4.1.2 FAULT CONNECTOR (J2)

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

The fault connector provides FORM-C contact closures for fault reporting. The two FORM-C summary fault contacts are Modulator and Common Equipment. To obtain a system summary fault, connect all of the FORM-C contacts in parallel.

Table 4-3. Faults Status Relays Connector Pinout (J2)

Signal

Function

Common Equipment Fault CE_NO

Modulator Fault MOD_NO

Modulator Alarm ALM_NO

Name Pin # Type

CE_COM

CE_NC

MOD_COM

MOD_NC

ALM _COM

ALM _NC

2 3 4 5 6 7 8 9

FC FC FC FC FC FC FC FC FC

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

indicates no fault.

4.1.3 TRANSMIT IF OUTPUT CONNECTOR (CP1)

CP1 is a BNC connector for the TX IF signal output. The output impedance is 75Ω (50Ω optional). The output is a modulated carrier between 50 and 180 MHz.

Pins Connected

Fault/

Alarm OK

2-3 1-2 2-3

5-6 4-5 5-6

7-8 8-9 8-9

Power

OFF

4.1.4 AC POWER

This unit shall be operated from the type of power source indicated on the marking label. If power source is unknown, contact the local power company. Damage to the unit may be the result.

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SDM-2020 Satellite Modulator Revision 7 External Connections MN/SDM2020M.IOM

Type TN System Only (EN 60950, Paragraph 1.2.12.1) - Power Distribution System: Power distribution system having one point directed toward the earth, the exposed conductive parts of the installation being connected to that point by protective earth conductors. This equipment shall not be used with single-phase three-wire (PE, TT, or IT) type power distribution system.

The A/C power is supplied to the modulator by a standard, detachable, non-locking, 3-prong power cord. The cord connects to a fused IEC 320-type power receptacle.

Internal to the unit, color-coded wiring is used in the A/C mains as follows:

Live

Neutral

Ground

Note: Since the equipment is not fitted with an ON/OFF switch, the A/C socket-outlet shall be

installed near the equipment and shall be easily accessible (EN 60950 1.7.2).

IMPORTANT

4.1.5 FUSE DATA

Fuse Type:

Littlefuse 215002 5 x 20 mm

UK Europe USA

(BS 1363) (CEE 7/7) (NEMA 5-15P)

Brown Brown Black

Blue Blue White

Green/Yellow Green/Yellow Green

Before replacing the fuses in the A/C input connector, disconnect the equipment from the power supply. Failure to do so may expose hazardous voltages. Unplug the equipment from the local power supply socket.

Fuse:

T2A H250V

Time Delay, 2A, High Breaking Capacity

Double Pole

(Approved to IEC 127, Sheet V and Underwriters Laboratories)

Refer to input power requirements as specified in Chapter 2.

Replacing a fuse

Remove the fuseholder on the back of the IEC 320 style A/C input connector (Figure 4-1).

Replace fuse with same or equivalent rated part and/or model number.

4-4

SDM-2020 Satellite Modulator Revision 7 External Connections MN/SDM2020M.IOM

4.1.6 DC POWER (OPTIONAL)

DC power is an available option. Contact Comtech EFData’s Customer Support for further assistance.

4.1.7 GROUND (GND) OR EARTH

A #10-32 stud is available on the rear panel for the purpose of connecting a common chassis ground among all of the equipment.

Note: A safety ground is provided through the AC power connector.

4.1.8 LITHIUM BATTERY REPLACEMENT

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose

CAUTION

4.2 PROPER OPERATIONS FOR EMISSIONS (CE)

To ensure compliance with the EMC Directive 89/336/EEC, properly shielded cables for Data I/O shall be used. These cables shall be doubled-shielded from end-to-end, ensuring a continuous ground shield.

of used batteries according to the manufacturer’s instructions.

4-5

SDM-2020 Satellite Modulator Revision 7 External Connections MN/SDM2020M.IOM

This page is intentionally left blank.

4-6

5.1 FRONT PANEL

The modem front panel (Figure 5-1) enables control of modem configuration parameters and displays the modem status.

Chapter 5. FRONT PANEL

OPERATIONS

Modulator

ALARMS

TRANSMIT

FAU LTS

TRANSMIT

STORED

POWER ON

SYNC

TRANSMITTER ON TEST MODE

ENTER

CLEAR

Figure 5-1. Front Panel View

The front panel features include:

• 32-character, 2-line LCD display

• 6-button keypad for local control

• 7- LEDs to provide overall status at a glance

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

• Configuration

• Monitor

• Faults/Alarms

• Stored Faults/Alarms

• Utility

5-1

SDM-2020 Satellite Modulator Revision 7 Front Panel Operation MN/SDM2020M.IOM

5.2 LED INDICATORS

The seven LEDs on the front panel indicate:

• General modem summary faults

• Status

• Alarms

The indicators are defined in Table 5-1 as follows:

Table 5-1. LED Indicators

Name LED Description

Faults

Transmit Red A fault condition exists in the transmit chain. Stored Yellow A fault has been logged and stored.

The fault may or may not be active.

Status

Power On Green Power is applied to the modem. SYNC Green The modulator is synchronized to the data in the selected framing

mode. The LED is continuously On when the DVB Framing Type is None.

Transmitter On Green Transmitter is currently On.

This indicator reflects the actual condition of the transmitter, as opposed to be programmed condition.

Test Mode Yellow Flashes when the modem is in a test configuration.

Alarms

Transmit Yellow A transmit function is in an alarm condition.

5-2

SDM-2020 Satellite Modulator Revision 7 Front Panel Operation MN/SDM2020M.IOM

5.3 FRONT PANEL KEYPAD

The keypad has an auto-repeat feature. If a key is held down for more than 1 second, the key action will repeat, automatically, at the rate of 15 keystrokes per

IMPORTANT

second. This is particularly useful when editing numeric fields, with many digits, such as frequency or data rate.

The front panel keypad permits local operation of the modem. The keypad consists of six keys (Figure 5-2).

ENTER

CLEAR

Figure 5-2. Keypad

Each key provides one or more logical functions. These functions are defined in the following table.

ENTER

CLEAR

Left and Right Diamond Keys

Top and Bottom Diamond Keys

This key is used to select a displayed function or to execute a modem configuration change.

This key is used to back out of a selection or to cancel a configuration change which has not been executed using [ENTER]. Pressing [CLEAR] generally returns the display to the previous selection.

These keys are used to move to the next selection or to move the cursor for certain functions.

Note: Throughout this chapter, [←] and [→] are used to indicate left and right diamond keys.

These keys are used primarily to change configuration data (numbers). At times, they are also used to move from one section to another.

Note: Throughout this chapter, [↑] and [↓] are used to indicate top and bottom diamond keys.

5-3

SDM-2020 Satellite Modulator Revision 7 Front Panel Operation MN/SDM2020M.IOM

The modem responds by beeping whenever a key is pressed:

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

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

operation

5.4 MENU SYSTEM

Note: The menus show features and options that are not available. However, they are shown to preserve the menu structure and reserve the structure for the future. This does not imply an intent or obligation to add these features or options in the future.

Use the Main menu in Figure 5-3 as a quick reference for accessing the modem functions.

When the modem power is applied, the base level of the menu system displays the sign-on message:

• Line 1 of the sign-on message is the modem model number and type.

• Line 2 is the version number of the firmware.

The main level of the menu system is Function Select. To access this level from the sign-on message, press the [←] or [→] keys. From the Function Select menu; select one of the functional categories:

• Configuration

• Monitor

• Faults/Alarms

• Stored Faults/Alarms

• Utility

Press [←] or [→] to move from one selection to another. When line 2 displays the desired function, select that level by pressing [ENTER]. After entering the appropriate functional level, press [←] or [→] to move to the desired function.

5-4

SDM-2020 Satellite Modulator Revision 7 Front Panel Operation MN/SDM2020M.IOM

To view or change the modem’s configuration, enter the Configuration level from the Function Select menu. Once in the Configuration menu, press [←] or [→] to scroll through the Configuration menu selection:

• Modulator

• Demodulator

• Interface

• Save

• Recall

Press [ENTER] to select the desired Configuration menu option. To view the options for the selected configuration parameters, press [←] or [→]. To change a configuration parameter, press [ENTER] to begin the change process.

Press [↑] or [↓] to change the parameters. After the display represents the correct parameters, press [ENTER] to execute the change. This action initiates the necessary programming by the modem.

To undo a parameter change prior to execution, press [CLEAR].

Notes:

1. Figure 5-3 list the front panel menu window selections.

2. Comtech EF Data recommends that selection of the desired Modem Type be made prior to making any other setting. This procedure is located in the Utility Modem Type menu.

3. Menus or commands that are specific to certain modem configurations are only accessible after selecting the appropriate modem configuration. This prevents incompatible parameters from accidentally being selected.

4. All of the windows are accessible in the Custom mode. Take caution not to select

incompatible parameters, as the modem does not shut out incompatible command choices in the Custom mode.

5-5

SDM-2020 Satellite Modulator Revision 7 Front Panel Operation MN/SDM2020M.IOM

5.5 MENU TREE

SELECT

CONFIGURATION FAULTS/ALARMS STORED FLTS/ALMS UTILITY

MODULATOR INTERFACE SAVE RECALL

MONITOR TX INTERFACE COMMON

MODULATOR X TX INTERFACE X COMMON X CLEAR

MODULATOR INTERFACE SYSTEM MOD OPTIONS FACTORY SETUP

TX-DR 15.000000 Mbps TX-SR 15.000000 Mbps TX-IF FREQUENCY 70.0000 MHz TX-IF OUTPUT OFF TX POWER LEVEL -10.0 dBm ENERGY DISPERSAL ON CARRIER MODE NORMAL-MODULATED

TX CLOCK PHASE NORMAL TX DATA PHASE NORMAL 2047 PATTERN OFF TX SYNC SELECT EXT SYNC TX DATA FAULT NONE TX CLK ACTIVITY ALARM DVB FRAMING TYPE 188 INTF LOOPBACK OFF TX CODING FORMAT AMI

MOD POWER OFFSET +0.0 dB MOD SPECTRUM NORMAL POWER UP TX-IF LAST KNOWN MODULATOR TYPE DVB-1

RS-422 LVDS ASI/RS422 ECL/HSSI TX G.703 SMPTE-310 ASI/LVDS UNKNOWN

TIME/DATE 12:00:00 AM / 7/04/76 REMOTE BAUD RATE 9600 bps / EVEN REMOTE ADDRESS 1 REMOTE TYPE RS-485 (4-WIRE) YEAR DISPLAY 2-DIGIT TEST MODE STATUS LAMP TEST DISPLAY CONTRAST 64 M&C FIRMWARE BOOT FIRMWARE ENCODER FIRMWARE R/S FIRMWARE MASTER RESET ALARM RELAY NORMAL

REV EMULATION CURRENT MOD OPTI ONS MODEM SERIAL CONFIURATION CODE - MOD

Figure 5-3. SDM-2020 Modulator Menu Tree

5-6

SDM-2020 Satellite Modulator Revision 7 Front Panel Operation MN/SDM2020M.IOM

5.6 OPENING SCREEN

This screen is displayed whenever power is first applied to the unit:

SDM-2020 MOD

VER: 9.1.2

Press any key to go to the top level selection screen.

5.6.1 FUNCTION SELECT:CONFIGURATION

FUNCTION SELECT

CONFIGURATION

The following choices are present:

Modulator

Interface

Save

Recall

This menu branch permits the user to fully configure the modulator.

This branch permits the user to fully configure the transmit phase of the modulator.

The user can save up to 10 different modulator configurations in the nonvolatile memory of the unit.

The user can recall the 10 different modulator configurations from the nonvolatile memory of the unit.

5.6.1.1 FUNCTION SELECT:CONFIGURATION:MODULATOR

CONFIGURATION

MODULATOR

Use this menu to configure the unit in a step-by-step process using each successive menu.

Use the [↑ ] [↓ ] arrows to make the desired selection, then press <ENTER>.

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SDM-2020 Satellite Modulator Revision 7 Front Panel Operation MN/SDM2020M.IOM

5.6.1.1.1 CONFIGURATION:MODULATOR:TX-DR

TX-DR QPSK 1/2

15.000000 Mbps

Selections include: QPSK 1/2, 3/4, 5/6, or 7/8

8PSK 2/3, 5/6, or 7/8

16QAM 3/4 or 7/8

Programming is done by either data rate or symbol rate. Data rate refers to the

equivalent serial data rate at the data interface connector. Symbol rate refers to the modulation rate after framing, trellis (Viterbi) coding, and Reed-Solomon coding are applied.

The framing type selection affects the symbol rate (if programming from the data rate

[TX-DR] menu), or the data rate (if programming from the symbol rate [TX-SR] menu). If data rate is programmed, the symbol rate menu is updated to reflect the code rate and framing selections. If symbol rate is programmed, the data rate display is similarly updated.

Programing the modulator data rate (DR) from 1.5 to 100 Mbit/s, in 1 bit/s steps is limited by code rate and data interface.

Press <ENTER> while the menu is displayed to turn OFF TX-IF Output.

Press <ENTER> a second time while the menu is displayed to turn ON TX-IF OUTPUT.

Observe the on/off status of the TRANSMITTER LED.

On entry, the current data rate is displayed with the flashing cursor on the first character.

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

Press [↑] or [↓] to increase or decrease the digit at the flashing cursor.

Press <ENTER> to execute the change.

When <ENTER> is pressed to change the data rate, the transmitter is automatically turned OFF to prevent the possible swamping of other channels.

Another menu is displayed that allows the operator to turn the transmitter ON again, simply by pressing <ENTER>.

5-8

SDM-2020 Satellite Modulator Revision 7 Front Panel Operation MN/SDM2020M.IOM

5.6.1.2 CONFIGURATION:MODULATOR:TX-SR

TX-SR QPSK 7/8

15.000000 Msps

Selections include: QPSK 1/2, 3/4, 5/6, or 7/8

8PSK 2/3, 5/6 or 7/8

16QAM 3/4 or 7/8

Use this menu to program the modulator symbol rate (SR) from 1 to 37.5, in 1 sym/s

steps, limited by code rate and data interface.

Programming is done by either data rate or symbol rate. Data rate refers to the equivalent serial data rate at the data interface connector.

Symbol rate refers to the modulation rate after framing, trellis (Viterbi) coding, and Reed-Solomon coding are applied.

The framing type selection affects the symbol rate (if programming from the data rate [TX-DR] menu), or the data rate (if programming from the symbol rate [TX-SR] menu). If data rate is programmed, the symbol rate menu is updated to reflect the code rate and framing selections. If symbol rate is programmed, the data rate display is similarly updated.

Press <ENTER> while the menu is displayed to turn OFF TX-IF Output.

Press <ENTER> a second time while the menu is displayed to turn ON TX-IF OUTPUT.

Observe the on/off status of the TRANSMITTER LED.

On entry, the current symbol rate is displayed with the flashing cursor on the first character.

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

Press [↑] or [↓] to increase or decrease the digit at the flashing cursor.

Press [ENTER] to execute the change.

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5.6.1.3 CONFIGURATION:MODULATOR:TX-IF FREQUENCY

TX-IF FREQUENCY

70.0000 MHz

Use this menu to program the modulator transmit frequency.

Range available: 50 to 180 MHz, in 2.5 kHz steps.

Press [ENTER] while this menu is displayed to turn OFF TX-IF Output.

Press [ENTER] a second time while this menu is displayed to turn ON TX-IF OUTPUT.

Observe the on/off status of the TRANSMITTER LED.

On entry, the current transmitter frequency is displayed with the flashing cursor on the first character.

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

Press [↑] or [↓] to increase or decrease the digit at the flashing cursor.

Press [ENTER] to execute the change.

5.6.1.4 CONFIGURATION:MODULATOR:TX-IF OUTPUT

TX-IF OUTPUT

OFF

Use this menu to program the modulator output to ON, OFF, or MORE.

On entry, the current status of the output is displayed.

Press [↑] or [↓] to select ON or OFF.

Press [ENTER] to execute the change.

Additionally:

Press [ENTER] when MORE is displayed to show the menu for toggling TX-IF ON and OFF.

In this mode, the carrier is turned ON [↑] or OFF [↓] without having to press [ENTER].

Press [ENTER} a second time with this menu displayed to turn ON TX-IF OUTPUT.

Observe the on/off status of the TRANSMITTER LED.

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5.6.1.5 CONFIGURATION:MODULATOR:TX-IF POWER LEVEL

TX POWER LEVEL

-10.0 dBm

Use this menu to program the modulator output power level.

Range available: +5 to -20 dBm, in 0.1 dBm steps.

On entry, the current transmitter power level is displayed with the flashing cursor on the first character.

Press [↑] or [↓] to increase or decrease the output power level in 0.1 dB steps.

Press <ENTER> to execute the change.

5.6.1.6 CONFIGURATION:MODULATOR:ENERGY DISPERSAL

ENERGY DISPERSAL

(SCRAMBLER) ON

Use this menu to program the energy dispersal ON or OFF.

On entry, the current status of the DVB Energy

Press [↑] or [↓] to select ON or OFF.

Press <ENTER> to execute the change.

Dispersal is displayed.

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5.6.1.7 CONFIGURATION:MODULATOR:CARRIER MODE

CARRIER MODE

NORMAL-MODULATED

Use this menu to program the modulator for continuous wave mode. Four modes of operation are available:

NORMALMODULATED

DUAL-CW Mode

OFFSET-CW Mode

CENTER-CW Mode

Normal modulated data. The Carrier Mode is in the OFF position for data modulation.

A test mode that generates a dual side-band suppressed carrier signal. Side-bands are one-half the symbol rate from the carrier. This is used to check the channel balance and carrier null.

A test mode that generates a single upper side-band suppressed carrier signal. The upper side-band is one-quarter the symbol rate from the carrier. This is used to check the quadrature.

A test mode that generates a carrier at the current modulator frequency. This can be used to measure the output frequency.

Press <ENTER> while in the NORMAL-MODULATED mode to turn OFF the TX-IF Output.

Press <ENTER> a second time to turn ON the TX-IF OUTPUT.

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5.6.2 FUNCTION SELECT:CONFIGURATION:INTERFACE

CONFIGURATION

INTERFACE

Use this menu to configure the unit in a step-by-step process by using each successive menu.

Use the [↑ ] [↓ ] arrows to make the sesired selection, then press <ENTER>.

5.6.2.1 CONFIGURATION:INTERFACE:TX CLOCK PHASE

TX CLOCK PHASE

NORMAL

Note: Not shown with G.703 data interface installed. Use this menu to program the TX

Clock Phase to NORMAL or INVERT.

On entry, the current setting for the TX Clock Phase is displayed.

Press [↑] or [↓] to select NORMAL or INVERT.

Press [ENTER] to execute the change.

5.6.2.2 CONFIGURATION:INTERFACE:TX DATA PHASE

TX DATA PHASE

NORMAL

Use this menu to program the TX Data Phase to NORMAL or INVERT.

On entry, the current setting for the TX Data Phase is displayed.

Press [↑] or [↓] to select NORMAL or INVERT.

Press [ENTER] to execute the change.

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5.6.2.3 CONFIGURATION:INTERFACE:2047 PATTERN

2047 PATTERN

OFF

Use this menu to program the transmitter to ON or OFF to insert a 2047 pattern instead of the normal transmit data.

Upon entry, the current status is displayed.

Press [↑] or [↓] to make the selection.

Press [ENTER] to execute the change.

5.6.2.4 CONFIGURATION:INTERFACE:TX SYNC SELECT

TX SYNC SELECT

EXT SYNC

Note: ASI/LVDS (ASI Mode) only can use CORR ON DAT.

Use this menu to program the transmitter for any one of the following methods of synchronization:

EXT SYNC Available only on interfaces with an external SYNC signal.

CORR ON DAT

AUTO DETECT

The external sync line is ignored. Data spec is detected by correlating the data stream for the MPEG-2 sync pattern.

Automatically selects the most reliable sync indicator. The external sync line is utilized, if available. Otherwise, the correlate on data method is used for sync. (Available only on interfaces with an external SYNC signal.)

Upon entry, the current TX Sync Select is displayed.

Press [↑] or [↓] to make the selection.

Press [ENTER] to execute the change.

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5.6.2.5 CONFIGURATION:INTERFACE:TX DATA FAULT

TX DATA FAULT

NONE

Upon entry, the current TX Data Fault that is being monitored is displayed.

Press a directional key to select one of the following modes:

NONE The TX interface alarm DATA/ASI is not activated.

Alarm Indication Signal (ASI)

DATA STABLE Sets TX interface fault DATA/ASI to monitor an

Press [↑] or [↓] to make the selection.

Press [ENTER] to execute the change.

Note: Detection of these conditions produces an alarm indication, not a fault.

Sets TX interface alarm DATA/ASI to monitor an alarm condition of all 1s from customer data input to the modulator.

alarm condition of all 1s or 0s. This is referred to as a data-stable condition, which means that the data is not transitioning.

5.6.2.6 CONFIGURATION:INTERFACE:TX CLK ACTIVITY

TX CLK ACTIVITY

ALARM

This parameter sets the response of the modulator when either a loss of clock activity or a clock out-of-tolerance condition is detected. The response generates either an alarm or fault based on the following selections:

• Alarm (TX-IF Remains ON)

• Fault (Shuts TX-IF OFF)

Upon entry, the new response is indicated.

Press <ENTER> to execute the change. The alarm condition is indicated for the Alarm selection.

Note: When Fault is selected, an indication is produced that causes the redundancy

switch-over.

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5.6.2.7 CONFIGURATION:INTERFACE:DVB FRAMING TYPE

DVB FRAMING TYPE

188

Note: Pressing <ENTER> in this menu turns off TX-IF Output.

Use this menu to program the DVB framing type for 188, 204, or NONE. The framing type describes the format of the data into the modulator. The equivalent serial data rate at the data interface connector is based upon the clock rate of the incoming data stream.

Upon entry, the current status of the DVB framing type is displayed.

Press [↑] or [↓] to make the selection.

Press <ENTER> to execute the change.

When <ENTER> is pressed to change the framing type, the transmitter is automatically turned off to prevent the possible swamping of other channels. Another menu is displayed that allows the operator to turn the transmitter on again by pressing <ENTER>.

5.6.2.8 CONFIGURATION:INTERFACE:INTF LOOPBACK

INTF LOOPBACK

OFF

Note: Available with either ASI/RS422, G.703, or ASI/LVDS interface installed.

Test mode loops the input data back to the output of the terrestrial interface. Data continues into the modulator. The yellow TEST MODE LED is illuminated when Loopback is turned ON. (See Interface Loop Thru as specified under Utility Interface for additional description.)

Upon entry, the current status of the Interface Loopback is displayed.

Press [↑] or [↓] to make the selection.

Press <ENTER> to execute the change.

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5.6.2.9 CONFIGURATION:INTERFACE:TX CODING FORMAT

TX CODING FORMAT

AMI

Note: Available with G.703 interface installed.

Use this menu to program the TX coding format for one of these choices:

• AMI

• B8ZS

• HDB3

• B3ZS

On entry, the current status is TX Coding Format displayed.

Press [↑] or [↓] to select ON or OFF.

Press <ENTER> to execute the change.

5.6.3 CONFIGURATION:SAVE

CONFIGURATION #X

SAVE

Use the Configuration Save menu to program configuration parameters into memory on the M&C. There are 10 memory locations that may be used to store specific frequently used configuration setups.

Change the configuration parameters to the desired settings.

Enter the Configuration Save menu.

Press [↑] or [↓] to select a memory location (range = 1 through 10).

Press <ENTER> to execute the save.

5.6.4 CONFIGURATION:RECALL

CONFIGURATION #X

RECALL

Use the Configuration Recall menu to recall a previously saved configuration setup.

Press [↑] or [↓] to select a memory location (range = 1 through 10).

Press <ENTER> to execute the recall.

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5.6.5 FUNCTION SELECT:FAULTS/ALARMS

Selections available: MODULATOR

TX INTERFACE

COMMON

Use the [←] [→] arrows to select an alarm type.

Press <ENTER>.

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5.6.5.1 FAULTS/ALARMS:MODULATOR

MODULATOR

------- -

Selections available include the following:

Fault/Alarm Possible Problem and Action

IF SYNTHESIZER Modulator IF synthesizer is faulted. This is considered a major alarm and

will turn OFF the modulator output. Return the modulator for repair.

DATA CLOCK SYN

This alarm is considered a major alarm and will turn OFF the modulator IF output

I CHANNEL

This alarm is considered a major alarm and will turn OFF the modulator IF output.

Q CHANNEL Activity alarm for the Q channel digital filter. Follow the same procedure as

AGC LEVEL Output power automatic gain control level fault. Indicates that the level at

MODULE Modulator module fault. Typically indicates the modulator will not

IF MODULE IF module fault. Typically indicates the IF module is not responding. CONFIGURATION Modulator configuration fault. Indicates the modulator cannot execute a

TX data clock synthesizer fault. This fault is an indication that the internal clock VCO has not locked to the incoming data clock, or the internal clock synthesizer has not locked to the internal reference. Check to see that the proper data rate has been set up and selected. Verify that the incoming data rate matches what has been selected in the modulator. Verify the frequency of the input data clock to be within the lock range of 100 PPM. If the inputs to the modulator are all correct and the problem still exists, replace the modulator and return it for repair.

Activity alarm for the I channel digital filter.An alarm in this position indicates either a fault in the scrambler, or if the scrambler is disabled, it indicates a loss of incoming data. If the fault is active with the scrambler turned OFF, check to see that there is input data at the DATA I/O connector. If data is present, the problem could be in the interface section. If the fault is active with the scrambler turned ON, the problem could be in the modulator section. Return the modulator for repair.

for the I channel.

the modulator output is not the level that is programmed. Replace the modulator and return it for repair.

program.This could indicate a problem in the interface between the modulator and M&C due to modulator firmware being installed incorrectly, or a pin not making contact. Verify the modulator firmware is correctly installed. If the problem still exists, return the modulator for repair.

programmed configuration parameter.

Use the [←] [→] arrows to make a selection.

Press <ENTER>.

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5.6.5.2 FAULTS/ALARMS:TX INTERFACE

TX INTERFACE

------- -

Selections available include the following:

Fault/Alarm Possible Problem and Action

FRAME SYNC Indicates that the modulator cannot synchronize to the data in the selected

framing mode.

DATA STABLE/ASI

Note: ASI is an alarm, not a switching fault.

CLOCK PLL Transmitter phase-locked loop fault. Indicates the transmitter Phase-Locked Loop

CLOCK ACTIVITY Activity detector alarm of the selected interface TX clock. The interface will fall

FIFO This fault indicates a data under-run/over-run condition. INTERFACE MODULE Interface module fault. Indicates a problem in programming the interface. This

DATA FORMAT This fault indicates a fault with the formatted data. VIDEO FRAME SYNC Video Frame SYNC fault. This fault indicates a loss of synchronization to

Use the [←] [→] arrows to make a selection.

Data or ASI. When data fault is selected in the Interface Configuration menu, the fault indicates

a data stable condition. This indicates the data is all 1s or 0s (i.e., data is not transitioning). When ASI is selected, the alarm indicates the data is all 1s from customer data input to the modem. When None is selected in the Configuration Interface menu, the TX Data/ASI Fault/Alarm is not activated.

(PLL) is not locked.

back to the internal clock when this alarm is active. Note: Refer to the Configuration Interface menu, TX CLK ACTIVITY. This menu

permits selection of a fault or an alarm indication for clock activity.

could indicate a problem in the M&C, or in the interface between the interface section and M&C. Return the modulator for repair.

incoming video data.

Press <ENTER>.

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5.6.5.3 FAULTS/ALARMS:COMMON

COMMON

------- -

Selections available include the following:

Fault/Alarm Possible Problem and Action

BATTERY/CLOCK M&C battery voltage or clock fault. Indicates a low voltage in the memory battery.

Typically will be active when a modulator has been Hard Reset, or the firmware has been changed. When a Hard Reset has been executed or the firmware has been changed, this fault will typically be active when the modulator is first turned on.

It should automatically clear as the battery charges up.

-12 VOLT SUPPLY

+12 VOLT SUPPLY

+5 VOLT SUPPLY +5V power supply fault. Use the same procedure as with -12V fault. To verify the +5V

CONTROLLER Controller fault. Indicates loss of power in the M&C card. Typically indicates the

Use the [←] [→] arrows to make a selection.

-12V power supply fault. Indicates a high or low voltage condition. Level is ± 5%. Check for a short on the -12V line from the power supply or on the board. Check TP2 on the M&C section to verify the proper -12V monitor voltage (1.06V).

If this voltage is not correct, it will verify that the -12V supply is not at the proper level. This would indicate the power supply is faulted. Return modulator for repair. +12V power supply fault. Use the same procedure as with -12V fault. To verify the

+12V power supply voltage, check TP4 on the M&C. A voltage of 3.81V will be monitored when the +12V is at the proper level.

power supply voltage, check TP5 on the M&C section. A voltage of 2.5V will be monitored when the +5V is at the proper level.

controller has gone through a power on-off cycle.

Press <ENTER>.

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5.6.6 FUNCTION SELECT:STORED FLTS/ALMS

Select MODULATOR, TX INTERFACE, or COMMON using the [←] [→] arrows, then press <ENTER>.

The modulator stores the first 10 (Flt0 through Flt9) occurrences of fault status changes in each of the three major fault categories. Each fault status change is stored with the time and date of the occurrence. Stored faults may be viewed by entering the Stored Faults level from the Function Select menu.

All stored faults may be cleared by executing the CLEAR Stored Faults? Command from the Stored Faults level.

Stored faults are not maintained through a controller power-on reset cycle. However, the last known time is maintained in non-volatile RAM, and upon power-down, a common equipment fault is logged (Flt0) with that time and date. On power-up, an additional common equipment fault is also logged (Flt1) to indicate the power-up time and date. On power-up, the power-down and power-up times are logged as common equipment fault 0 and common equipment fault 1.

Upon entering the Stored Faults level, press [←] or [→] to move between the fault groups and the CLEAR Stored Faults?? Selections. The time and date of the first stored fault status (Flt0) for the selected group will be displayed alternately on line 2 of the display. Press [↑] or [↓] to cycle through the selected group’s stored fault status (Flt0 through Flt9). To display the fault status associated with the displayed time and date, press [ENTER]. At this time, press [←] or [→] to move the flashing cursor to the fault to be identified.

Note: Faults are stored in time sequence, with the oldest fault status change stored in

Flt0, and the most recent in Flt9. Only the first 10 fault status changes are stored, additional faults are ignored until the log is cleared. All stored faults, which have not been used, indicate No Fault on the display.

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5.6.6.1 STORED FLTS/ALMS:MODULATOR

MODULATOR X

STORED TIME/DATE

Selections available include the following:

IF SYNTHESIZER AGC LEVEL

DATA CLOCK SYN MODULE

I CHANNEL IF MODULE

Q CHANNEL CONFIGURATION

Use the [←] [→] arrows to make a selection.

Press <ENTER>.

5.6.6.2 STORED FLTS/ALMS:TX INTERFACE

TX INTERFACE X

STORED TIME/DATE

Selections available include the following:

FRAME SYNC FIFO

DATA STABLE/AIS INTERFACE MODULE

CLOCK PLL DATA FORMAT

CLOCK ACTIVITY VIDEO FRAME SYNC

Use the [←] [→] arrows to make a selection.

Press <ENTER>.

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5.6.6.3 STORED FLTS/ALMS:COMMON

COMMON X

STORED TIME/DATE

Selections available include the following:

BATTERY/CLOCK

+12 VOLT SUPPLY

–12 VOLT SUPPLY

+5 VOLT SUPPLY,CONTROLLER

CONTROLLER

Use the [←] [→] arrows to make a selection.

Press <ENTER>.

5.6.6.4 STORED FLTS/ALMS:CLEAR ??

CLEAR ??

STORED TIME/DATE

To clear the stored faults currently logged, press <ENTER>

Once the CLEAR Stored Faults/YES?? selection is displayed, press <ENTER> again to clear.

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5.6.7 FUNCTION SELECT:UTILITY

The Utility Factory Setup menu is for Comtech EF Data service personnel only. Unauthorized access may cause the modulator to

CAUTION

The Function Select Utility menu is divided into the following categories:

operate incorrectly.

Changes in the Utility menu may cause changes in other front panel menus.

• Modulator

• Interface

• System

• Options

• Factory Setup - (Factory Use Only)

Press [←] or [→] to select the desired Utility menu.

Press [ENTER].

Press [←] or [→] to select the desired function.

5.6.7.1 UTILITY:MODULATOR:MOD POWER OFFSET

MOD POWER OFFSET

+ 0.0 dB

Use this menu to “offset” the modulator output power readout in the Configuration menu. This feature does not actually change the modulator power level. The function is to change the actual reading to display an offset value in the monitor.

The modulator Power Offset can be set from –40.0 to +40.0 dB, in 0.1 dB increments.

Any value except 0.0 dB causes (ADJ) to be displayed in the TX Power Level screen.

5.6.7.2 UTILITY:MODULATOR:MOD SPECTRUM

MOD SPECTRUM

NORMAL

Use this menu to select NORMAL or INVERT for spectrum reversal of the I and Q baseband channels (programmable vector rotation).

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5.6.7.3 UTILITY:MODULATOR:POWER UP TX-IF

POWER UP TX-IF

LAST KNOWN

Use this menu to select the state of the TX-IF Output at power up. Selections include OFF and LAST KNOWN (last known state). Upon entry, the current status of the TX-IF Output power up state is displayed.

Press [↑] or [↓] to make the selection.

Press <ENTER> to execute the change.

5.6.7.4 UTILITY:MODULATOR:MODULATOR TYPE

MODULATOR TYPE

DVB-1

Use this menu to select a spectral mask type of DVB-1 or DVB-2:

DVB-1 This is the default mask and is the “best fit” to the ETS 300 421 mask.

DVB-2 This mask has a sharper cutoff in the transition region from 3 to 40 dB

resulting in a narrower spectrum, than DVB-1, at the 35 dB down region.

While in this menu, press <ENTER> to turn OFF the TX-IF Output.

Press [ENTER] a second time to turn ON the TX-IF OUTPUT.

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5.6.8 FUNCTION SELECT:UTILITY:INTERFACE

INTERFACE TYPE

XXXXXXXXXXX

Selections include:

RS-422 LVDS

ASI/RS422 ECL/HSSI TX

G.703 SMPTE 310

ASI/LVDS UNKNOWN

Use the [←] [→] arrows to make a selection.

Press <ENTER>.

Additional data interfaces will be added to the menu as they are introduced. If an interface is not recognized, then UNKNOWN is displayed. In this case, a later version of firmware may be required to operate with the data interface.

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5.6.8.1 FUNCTION SELECT:UTILITY:RS422

INTERFACE TYPE

RS-422

This status-only item displays RS422 or UNKNOWN. No changes can be made from this menu. Use [↑] or [↓]to select an interface type and press <ENTER>.

RS-422 INT SELECT

DVB (J3)

The display shows the RS422 interface type of DVB(J3) or 530 (J4). Upon entry, the current status of the DVB type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

INTF MODE SELECT

SERIAL

Note: This item is valid only if DVB was selected from the RS422 INT SELECT menu.

The display shows the SERIAL or PARALLEL mode type. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

RTS TX-IF CNTRL

OFF

This display shows the status of RTS CONTROL (either ON or OFF). The RTS CONTROL signal can be used to turn on or off the TX-IF output.

Upon entry, the current status of RTS is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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RTS STATE

NORMAL

This display shows the status of RTS STATE (either NORMAL or INVERT ).

Upon entry, the current status of RTS is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

CTS STATE

NORMAL

This display shows the status of CTS STATE (either NORMAL or INVERT).

Upon entry, the current status of CTS is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

DM STATE

NORMAL

This display shows the status of DM STATE (either NORMAL or INVERT).

Upon entry, the current status of DM STATE is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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5.6.8.2 FUNCTION SELECT:UTILITY:LVDS

INTERFACE TYPE

LVDS

This status-only item displays LVDS or UNKNOWN. No changes can be made from this menu. Use [↑] or [↓]to select an interface type and press <ENTER>.

INTF MODE SELECT

SERIAL

This display shows the mode type SERIAL or PARALLEL. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

5.6.8.3 FUNCTION SELECT:UTILITY:ASI/RS422

INTERFACE TYPE

ASI/RS422

This status-only item displays ASI/RS422 or UNKNOWN. No changes can be made from this menu. Use [↑] or [↓]to select an interface type and press <ENTER>.

INTERFACE SELECT

ASI

Displays the mode type ASI or RS422. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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TX INTF FIRMWARE

FW/6220A

Press <ENTER]> to show the FW Release date.

TX INTF FIRMWARE

11/25/97

Press <CLEAR> to exit the data menu.

ASI LINK SELECT

B-LINK (J3)

This display shows the A-LINK (J4) or B-LINK (J3). Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

ASI LOOP BW

WIDE

Note: This is for ASI mode only.

This display shows the ASI Loop BW selection of either Wide or Narrow. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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INTRFC LOOP THRU

OFF

This display shows the Interface Loop thru selection of either ON or OFF. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

When ON is selected, input data is looped to the output of the terrestrial interface and data continues into the modulator. This mode is indential to Interface Loopback specified under the Configuration Interface menu; however, the yellow TEST MODE LED is not illuminated. Conceptually, the data output is operating as a monitor point.

RTS TX-IF CNTRL

OFF

This display shows the status of RTS CONTROL either ON or OFF type. The RTS CONTROL signal can be used to turn on or off the TX-IF output. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

RTS STATE

NORMAL

This display shows the RTS selection of either NORMAL or INVERT. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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CTS STATE

NORMAL

This display shows the CTS selection of either NORMAL or INVERT. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

DM STATE

NORMAL

Note: RS-422 Interface Select only.

This display shows the DM selection of either NORMAL or INVERT. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

ST STATE

NORMAL

Note: RS-422 Interface Select only.

This display shows the ST selection of either NORMAL or INVERT. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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5.6.8.4 FUNCTION SELECT:UTILITY:ECL_HSSI TX

INTERFACE TYPE

ECL_HSSI TX

This status-only item displays ECL_HSSI TX or UNKNOWN. No changes can be made from this menu. Use [↑] or [↓]to select an interface type and press <ENTER>.

DTE STATUS

AVAILABLE

This display shows the DTE STATUS selection of either AVAILABLE or UNAVAILABLE. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

Note: Available = TA asserted

Unavailable = TA unasserted

DTE TX-IF CNTRL

OFF

This display shows the DTE TX-IF CNTRL selection of either ON or OFF. With the ON selection, the RF carrier is ON when TA is enabled, and the RF carrier is OFF when the TA is disabled. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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DTE STATE

NORMAL

This display shows the DTE STATE selection of either NORMAL or INVERTED. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

DCE STATE

NORMAL

This display shows the DCE STATE selection of either NORMAL or INVERTED. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

5.6.8.5 FUNCTION SELECT:UTILITY:G.703

INTERFACE TYPE

G.703

This status-only item displays G.703 or UNKNOWN. No changes can be made from this menu. Use [↑] or [↓]to select an interface type and press <ENTER>.

INTRFC LOOP THRU

OFF

This display shows the Interface Loop Thru either in ON or OFF position. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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When ON is selected, input data is looped to the output of the terrestrial interface and data continues into the modulator. This mode is indential to Interface Loopback specified under the Configuration Interface menu; however, the yellow TEST MODE LED on the front panel is not illuminated. Conceptually, the data output is operating as a monitor point.

RTS TX-IF CNTRL

OFF

This display shows the RTS TX-IF Control is either ON or OFF. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

RTS STATE

NORMAL

This display shows the RTS State is either NORMAL or INVERT. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

TX INTF FIRMWARE

FW/6231–

Press <ENTER> to show the FW Release date.

TX INTF FIRMWARE

07/22/98

Press CLEAR to exit the data menu.

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5.6.8.6 FUNCTION SELECT:UTILITY:SMPTE 310M

INTERFACE TYPE

SMPTE–310M

This status-only item displays SMPTE-310M or UNKNOWN. No changes can be made from this menu. Use [↑] or [↓]to select an interface type and press <ENTER>.

INTRFC LOOP THRU

OFF

This display shows the Interface Loop Thru either in ON or OFF position. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

When ON is selected, input data is looped to the output of the terrestrial interface and data continues into the modulator. This mode is indential to Interface Loopback specified under the Configuration Interface menu; however, the yellow TEST MODE LED on the front panel is not illuminated. Conceptually, the data output is operating as a monitor point.

RTS TX-IF CNTRL

OFF

This display shows the RTS TX-IF Control is either ON or OFF. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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RTS STATE

NORMAL

This display shows the RTS State is either NORMAL or INVERT. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

TX INTF FIRMWARE

FW/nnnnnnrr

Press <ENTER> to show the FW Release date.

TX INTF FIRMWARE

xx/xx/xx

Press CLEAR to exit the data menu.

RX INTF FIRMWARE

FW/nnnnnnrr

Press <ENTER> to show the FW Release date.

RX INTF FIRMWARE

xx/xx/xx

Press CLEAR to exit the data menu.

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5.6.8.7 FUNCTION SELECT:UTILITY:ASI/LVDS

INTERFACE TYPE

ASI/LVDS

This status-only item displays ASI/LVDS or UNKNOWN. No changes can be made from this menu. Use [↑] or [↓]to select an interface type and press <ENTER>.

INTERFACE SELECT

ASI

Note: LVDS cannot be selected if jumper position is in RX_LVDS mode.

This display shows the mode type ASI or LVDS interface. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

TX INTF FIRMWARE

FW/XXXX

Press <ENTER> to show the FW Release date.

TX INTF FIRMWARE

MM/DD/YY

Press CLEAR to exit the data menu.

ASI LINK SELECT

B-LINK (J3)

Note: This is for ASI mode only.

This display shows the A-LINK (J4) or B-LINK (J3). Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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ASI LINK MODE

MANUAL

Note: This is for ASI mode only.

This display shows the ASI Link Mode selection of either Manual or Auto. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

ASI LOOP BW

WIDE

Note: This is for ASI mode only.

This display shows the ASI Loop BW selection of either Wide or Narrow. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

INTRFC LOOP THRU

OFF

Displays the Interface Loop thru selection of either ON or OFF. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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LVDS STATUS (J7)

RX LVDS

Note: Jumper setting dependent.

This display shows the status of either RX LVDS or TX LVDS. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

RTS TX-IF CNTRL

OFF

This display shows whether the RTS TX-IF Control is ON or OFF. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

RTS STATE

NORMAL

This display shows the RTS selection of either NORMAL or INVERT. Upon entry, the current status of the mode type is displayed.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

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5.6.8.8 FUNCTION SELECT:UTILITY:SYSTEM

TIME: 12:00:00AM

DATE: 7/04/76

The current time and date in the modulator memory are displayed. To set the modulator time and/or date, proceed as follows:

Press <ENTER>

Press [←] or [→] to position the flashing cursor over the parameter to be changed

Press [↑] or [↓] to change the parameter to the desired value

Once the parameters are displayed as desired, press <ENTER> to set the time and date

REMOTE BAUD RATE

9600 BPS EVEN

The current baud rate and parity selection of the modulator are displayed. To set the modulator baud rate and/or parity, proceed as follows:

Press <ENTER>.

Press [←] or [→] to position the flashing cursor over the parameter to be changed.

Press [↑] or [↓] to change the parameter to the desired value.

Once the parameters are displayed as desired, press <ENTER> to set the baud rate and

parity. The baud rate can be set from 300 to 19200. The parity can be set to EVEN, ODD, or NONE.

REMOTE ADDRESS

The current modulator address is displayed (1 to 255). To set the remote address, proceed as follows:

Press <ENTER>.

Press [↑] or [↓] to change the parameter to the desired value.

Press <ENTER> to execute the change.

Note: Address 0 is reserved as a global address.

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REMOTE TYPE

RS-485 (4-WIRE)

Use this display to select a remote interface type.

Choices include:

RS-485 (4-wire)

RS-485 (2-wire)

RS-232

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

YEAR DISPLAY

2 – DIGIT

Use this menu to set the year display to 2 or 4 digits.

Press [↑] or [↓] to select an item.

Press <ENTER> to execute the change.

TEST MODE STATUS

– +– – – – –

The following modulator test points are listed in this Test Mode Status window, and will display a “+” when a test mode is active:

• RF OUTPUT • CARRIER MODE

• MOD FAULTS • INTF FAULTS

• 2047 PATTERN • IMPULSE TEST

• INTERFACE LOOPBACK

To view the test modes,

Press <ENTER>.

Press [←] or [→] to move through the list of test modes.

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LAMP TEST ??

PRESS ENTER

Use the Lamp Test function to verify the front panel indicators.

Press <ENTER> to turn on all of the front panel indicators for 3 seconds.

DISPLAY CONTRAST

LEVEL: 64

Set the contrast level of the front panel display. Level 64 is the default.

Press <ENTER> to change the contrast of the front panel display.

Press [↑] or [↓] to increase or decrease the number at the flashing cursor from 0 to 100.

Press <ENTER> to execute the change.

M&C FIRMWARE

FW/NNNN-DRR

This status-only window displays the M&C module firmware version. Press <ENTER> to display the release date of this firmware.

M&C FIRMWARE

MM/DD/YYYY

Press <CLEAR> to exit the date window.

BOOT FIRMWARE

FW/NNNN-DRR

This status-only window displays the BOOT Firmware number. Press <ENTER> to display the release date of this firmware. Press <ENTER> again to display the firmware version.

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BOOT FIRMWARE

VER: X.X.X

Press <CLEAR> to exit the date window.

ENCODER FIRMWARE

FW/NNNN-DRR

This status-only window displays the ENCODER FIRMWARE number. Press <ENTER> to display the release date of this firmware. Press <ENTER> again to display the firmware version.

ENCODER FIRMWARE

MM/DD/YYYY

Press <CLEAR> to exit the date window.

R/S FIRMWARE

FW/NNNN-DRR

This status only window displays the R/S FIRMWARE number. Press <ENTER> to display the release date of this firmware. Press <ENTER> again to display the firmware version.

R/S FIRMWARE

MM/DD/YYYY

Press <CLEAR> to exit the date window.

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5.6.8.8.1 Master Reset Function

MASTER RESET

HARD/SOFT

When a hard reset is initiated, the modulator hardware is reset, and all default configuration settings will be installed. When a soft reset is

CAUTION

Press <ENTER> once to access SOFT.

Press [↑] or [↓] to alternate between HARD and SOFT until the desired type is visible.

Press <ENTER>. If SOFT has been selected,

initialized, the modulator hardware will be reset, but the initial firmware configuration settings will be saved.

Press <ENTER> again to reset the modulator. If HARD is selected, press [→] until the cursor is on YES.

Press <ENTER>.

5.6.8.8.2 Alarm Relay Function

ALARM RELAY

NORMAL

This window displays the Alarm Relay selections of NORMAL or INVERT.

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5.6.9 FUNCTION SELECT:UTILITY:MOD OPTIONS

REV EMULATION

CURRENT VERSION

Use this menu to select the emulation mode of a previous functional revision. Revision emulation allows the user interfaces (either front panel or remote) to emulate a previous version of software. Upon entry, the current version is displayed.

Press a arrow key to select the FUNCTIONAL versions.

Press [ENTER] to execute the change.

Note: The Utility menu numbers increase with each software version change.

MOD OPTIONS

-++

This menu displays the modulator options listed below. If an option is not installed, the ““ (minus) symbol is displayed to the right of the option. If the option is installed, the “+“ (plus) symbol is displayed to the right of the option.

• OEM LCD

• 16QAM

• 8PSK

(- or +) (- or +) (- or +)

- = Not Installed

+ = Installed

MODEM SERIAL #

012345678

This is a status-only display of the modulator serial number.

CONFIGURATION

CODE – MOD

Use this window to execute the Comtech EF Data-supplied “FAST” code. On entry, the current configuration code is displayed with the flashing cursor on the first character.

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AAAAAAAAAA AAAAAAAAAA

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

Press [↑] or [↓] to increase or decrease the digit at the flashing cursor.

Press <ENTER> to execute the change. Entering this code enables the corresponding

modulator option.

To purchase an option, contact Comtech EF Data Customer Support for more information.

IMPORTANT

5.6.10 UTILITY:FACTORY SET-UP

UTILITY

FACTORY SET-UP

This configuration is used for factory alignment and filter setup parameters. To avoid modulator failure, Factory Setup should not be

CAUTION

changed by unauthorized persons.

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5.7 INITIAL DEFAULT SETTINGS

Parameter Setting Parameter Setting

Configuration Modulator

Modulation/Code Rate QPSK 1/2 IF Output Off Data Rate 15.000,000 Mbps TX Power Level -10.0 dBm Symbol Rate 15.000000 Msps Scrambler On IF Frequency 70 MHz Carrier Mode Normal-Modulated

Configuration Interface

TX Clock Phase Normal TX CLK Activity Alarm TX Data Phase Normal DVB Framing Type 188 2047 Pattern Off INTF Loopback Off TX SYNC Select EXT SYNC TX Coding Format AMI TX Data Fault None

Utility Modulator MOD Power Offset +0.0 dB Power UP TX-IF Last Known MOD Spectrum Normal Modulator Type DVB-1

Utility Interface

RS422 Interface

RS422 Interface Select DVB (J3) RTS State Normal Interface Mode Select Serial CTS State Normal RTS TX-IF CNTRL Off DM State Normal

LVDS Interface

Interface Mode Select Serial

ASI/RS422 Interface

Inter face Select ASI RTS TX-IF Control Off TX Interface Firmware FW/6220A RTS State Normal ASI Link Select B-Link (J3) CTS State Normal ASI Loop BW Wide DM State Normal Interface Loop Thru Off ST State Normal

ECL/HSSI Interface

DTE Status Available DTE State Normal DTE TX-IF Control Off DCE State Normal

G.703 Interface

Interface Loop Thru Off RTS State Normal RTS TX-IF Control Off TX Interface FW FW/6231

SMPTE 310M

INTF LOOP THRU Off RTS State Normal

ASI/LVDS

Interface Select ASI LVDS Status RX LVDS (J7) ASI Link Select B-Link (J3) RTS TX-IF CNTRL Off Asi Loop BW Wide RTS State Normal Interface Loop Thru Off

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Utility System

Time and Date 12:00:00AM, 7/04/76 Remote Type RS485 (4-Wire) Remote Baud Rate 9600 bit/s Year Display 2-Digit Remote Address 1 Display Contrast 64

5.8 REVISION EMULATION OPERATION

Use the revision emulation feature in the Utlity Modem Type menu to program an emulation mode from Version 1.1.1 through the current version.

Table 5-2. SDM-2020 Modulator Revision Emulation

Software # Firmware # Firmware # Description of Change

1.1.1 FW/5613-1- Original Release

1.1.2 FW5613-1A Added data to RS422 interface mode selection menu.

2.1.1 FW/5613-1B Added LVDS interface data to Utility menu.

2.1.2 FW/5613-1C User interface changes.

3.1.1 FW/5613-1D User interface changes

4.1.1 FW/5613-1E Added ASI/RS422 interface data to Utility menu.

4.1.2 FW/5613-1F Added ASI interface changes.

4.1.3 FW/5613-1G Incorporated RS FIFO changes

4.1.4 FW/5613-1H Added alarm relay.

4.1.5 FW/5613-1J Correct spur problems.

5.1.1 FW/5613-1K Added ECL/HSSI interface data to Utitlity menu.

5.2.1 FW/5613-1L Added data clock spectrum lock detect fault.

5.2.2 FW/5613-1M Added OEM display for “ET_” command.

5.2.3 FW/5613-1N Added DCE signal on ECL interface.

5.3.1 FW/5613-1P Added G.703 interface data to Utility menu.

5.3.2 FW/5612-1R Added SMPTE 310M interface data to Utility menu.

6.1.1 FW/5613-1T User interface changes.

6.1.2 FW/5613-1U FW/5613-2U Introduced FW/5613-2.

7.1.1 FW/5613-1V FW/5613-2V Added 16QAM rate as a FAST option.

7.1.2 FW/5613-1W FW/5613-2W User interface changes.

8.1.1 FW/5613-1Y FW/5613-2Y User interface changes. Added data rates for G.703 T1 and E1.

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Table 5-2. SDM-2020 Modulator Revision Emulation (Continued)

Software # Firmware # Firmware # Description of Change

8.1.4 FW/5613-1AC FW/5613-2AC Added ASI/LVDS interface data to Utility menu.

8.1.5 FW/5613-1AD FW/5613-2AD User interface changes.

9.1.2 FW/5613-1AG FW/5613-2AG User interface changes.

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Chapter 6. DATA INTERFACES

6.1 DESCRIPTION

The data interface is a plug-in module that provides a specific terrestrial connection to the modulator unit. Where practical, both the TX (modulator) and RX (demodulator) paths are incorporated into the data interface.

Different interfaces are described in the following chapters. As additional interfaces are developed, a new chapter will be added to include the new interfaces. Contact Comtech EF Data Customer Support for the latest offering.

6.1.1 INTERFACE/M&C SOFTWARE REQUIREMENTS

As additional data interfaces are introduced, the software is revised to support the operation of each interface. Table 6-1 summarizes the minimum software version necessary to operate each interface type

Table 6-1. Minimum Software Revisions

Data Interface Minimum Software Version

RS-422 1.1.1

LVDS 1.1.1

ASI & RS-422 4.1.1

ECL/HSSI 5.1.1

G.703 5.3.1

G.703 (Adds T1and E1) 8.1.1

SMPTE 310M 5.3.2

ASI/LVDS 8.1.4

To avoid damaging the modulator, always disconnect the power before removing or installing a data interface.

CAUTION

ASI & RS-422 interface is being phase out for the ASI/LVDS interface. Contact Comtech EF Data Customer

Support department if this action causes a configuration problem.

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Data Interfaces MN/SDM2020M.IOM

6.1.2 TRANSMIT/RECEIVE DATA

The data format for the transmit (TX) and receive (RX) data interfaces are the same. There are three general modes of operation that are described in Section 3.1:

• None (187)

• 188

• 204

When None (187) mode is selected, no frame structure is expected, while the 188 and 204 modes synchronize to standard MPEG-2 transport frames. Other supported data formats are referenced in the appropriate section of this appendix, but the data from other frame formats is extracted and converted to one of the three modes of operation.

Figure 6-1 and Figure 6-2 depict the 204-byte packetization for byte parallel and byte serial formats, showing all possible data fields and timing signal relationships. The 188 byte and no framing formats are subsets of the 204 byte format.

DATA

SYNC

CLOCK

DVALID

DATA

SYNC

CLOCK

DVALID

1 Byte Sync 1 Byte Sync

SYNC

187 Bytes Payload

16 RS Bytes

SYNC

Figure 6-1. 204 Byte Parallel Format

Bits Sync

0100 1011

Bits Payload

Bits R

Bits Sync

0100 1011

1187 116

Figure 6-2. 204 Byte Serial Format

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Note: For proper operation, data and timing must be continuous, and meet the described criteria as

specified in Figure 6-1, Figure 6-2, and Table 6-2.

Table 6-2. 204 Data and Timing

DATA

CLOCK

SYNC

DVALID

Payload data is byte parallel, where DATA 7 is the most significant bit; or byte serial, where data is applied to DATA 7 with the most significant bit preceding the least.

For 188 and 204 format, the payload is 187 bytes in length, preceded by a sync word. In the 204-byte mode, the payload is followed by 16 bytes of reed-Solomon data, or 16 filler bytes.

The clock is at the bit or byte rate in accordance with serial or parallel mode. The rising edge of the clock is centered on the data.

SYNC timing depends upon the selection made for DVB FRAMING TYPE in the Configuration Interface menu

DVB Framing Type

188 or 204 The SYNC timing is derived from either the EXT SYNC or CORR ON DATA selection from the Configuration Interface menu. See the TX SYNC SELECT command, Appendix A.

None The SYNC signal is ignored.

For the 188 or 204 byte framing modes, either a SYNC pulse or SYNC byte of value 47h is required, dependent on the modulator configuration. Both may be applied, with only one having effect, dependent upon configuration. When used, the SYNC pulse is active high centered over the SYNC word. In parallel operation, it is one byte clock width. In serial operation, the modulator recognizes the SYNC pulse centered on the entire SYNC bit (8 clocks wide), or centered on the most significant bit of the byte (1 clock wide).

Although this signal is identified by both DVB and DBS formats, it is not used by the modulator.

SYNC

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Chapter 7. RS-422 PARALLEL/SERIAL

7.1 GENERAL

This interface operates at RS-422 signal levels. It accommodates a variety of MPEG-2 framing formats and EIA-530 serial data.

7.1.1 APPLICABLE DOCUMENTS

TM1449

Interfaces for CATV/SMATV Headends and Similar Professional Equipment

INTERFACE

TIA/EIA-644

RS-422

EIA-530

Telecommunications Industry Standard, Electrical Characteristics Of Low Voltage Differential Signaling (LVDS) Interface Circuits (originally Standards Proposal SP-3357)

Electrical Characteristics of Balanced Voltage Digital Interface Circuits

High Speed 25-Position Interface for Data Circuit - Terminating Equipment

7.1.2 DESCRIPTION

The RS-422 interface has two data connectors and an auxiliary connector supporting various operating modes.

• J3 Parallel/Serial DVB Connector (25-pin D, female):

• Parallel mode – In this mode, the interface behaves like a DVB parallel

synchronous interface, but with RS-422 levels. The input is at the byte rate.

• Serial mode – An alternate form of operation is possible, where the MSB is used for serial input at the bit rate.

• J4 Serial EIA-530 Connector (25-pin D, female):

• Serial mode only – RS-422 levels with pinout and operation per EIA-530

at a serial clock rate.

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Comtech EF Data SDM-2020 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Customer Support

Table of Contents

About this Manual

Related Documents

Conventions and References

Reporting Comments or Suggestions Concerning this Manual

Overview of Changes to Previous Edition

Electrical Safety

Fuses

Environmental

Installation

Warranty Policy

Limitations of Warranty

Exclusive Remedies

Disclaimer

MODULATOR

2.1 SPECIFICATIONS

2.1.1 GENERAL SPECIFICATION

2.2 DIMENSIONAL ENVELOPE

4.1 EXTERNAL CONNECTIONS

5.6.2 FUNCTION SELECT:CONFIGURATION:INTERFACE

5.6.3 CONFIGURATION:SAVE

5.6.4 CONFIGURATION:RECALL

5.6.5 FUNCTION SELECT:FAULTS/ALARMS

5.6.6 FUNCTION SELECT:STORED FLTS/ALMS

5.6.7 FUNCTION SELECT:UTILITY

5.6.8 FUNCTION SELECT:UTILITY:INTERFACE

This window displays the Alarm Relay selections of NORMAL or INVERT.

5.6.9 FUNCTION SELECT:UTILITY:MOD OPTIONS

5.6.10 UTILITY:FACTORY SET-UP