1. Manuals
  2. Brands
  3. Comtech EF Data Manuals
  4. Modulator
  5. SDM-2020
  6. Installation and operation manual

Comtech EF Data SDM-2020 Installation And Operation Manual

Satellite demodulator
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
SDM-2020
Satellite Demodulator
Installation and Operation Manual
Part Number MN/SDM2020D.IOM
Revision 3

Advertisement

Table of Contents
loading

Related Manuals for Comtech EF Data SDM-2020

Summary of Contents for Comtech EF Data SDM-2020

  • Page 1 SDM-2020 Satellite Demodulator Installation and Operation Manual Part Number MN/SDM2020D.IOM Revision 3...
  • Page 2 SDM-2020 Satellite Demodulator Installation and Operation Manual Part Number MN SDM2020D Revision 3 Comtech EFData is an ISO 9001 June 15, 2000 Registered Company. Copyright © Comtech EFData, 2000. All rights reserved. Printed in the USA. Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161...
  • Page 3 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...

  • Page 4: Table Of Contents

    BER Performance, QPSK with Reed-Solomon Coding ..............1–11 1.4.2 BER Performance, 8PSK with Reed Solomon Coding ..............1–11 1.4.3 BER Performance, 16QAM with Reed-Solomon Coding..............1–11 SDM-2020 Demodulator Envelope ......................1–15 CHAPTER 2. INSTALLATION ...................2–1 Unpacking..............................2–1 Installation..............................2–2 2.2.1 Data Interfaces ............................
  • Page 5 Preface SDM-2020 Satellite Demodulator 2.3.6 AC Power ............................2–11 2.3.7 Fuse Data............................2–12 2.3.8 DC Power (Optional) ........................2–12 2.3.9 Ground (GND) or Earth ........................2–12 Proper Operations for Emissions (CE) ....................2–12 CHAPTER 3. OPERATION ..................3–1 Introduction..............................3–1 Front Panel ..............................3–2 3.2.1...
  • Page 6 SDM-2020 Satellite Demodulator Preface A.1.1 Interface/M&C Software Requirements..................... A–2 A.1.2 Transmit/Receive Data........................A–2 RS-422 Parallel/Serial Interface......................A–5 A.2.1 Applicable Documents ........................A–5 A.2.2 Description ............................A–5 A.2.3 Configuration ............................. A–6 A.2.4 User Interfaces ........................... A–8 A.2.4.1 Parallel, J3, DB25 Female (DVB Parallel/Serial Data Interface) ..........A–8 A.2.4.1.1...
  • Page 7 Preface SDM-2020 Satellite Demodulator A.5.4.8 Terrestrial RX Clock Phase ..................... A–37 A.5.5 Monitor and Control Functions ......................A–38 A.5.5.1 System Implementation ......................A–38 A.5.5.2 Faults ............................A–38 A.5.5.3 ECL/HSSI Interface Front Panel Menus ................. A–39 A.5.5.4 ECL/HSSI Interface Remote Control Commands ..............A–39 G.703 Data Interface ..........................
  • Page 8 SDM-2020 Satellite Demodulator Preface A.8.2 Description ............................A–65 A.8.3 Interface Specifications ........................A–67 A.8.3.1 Jumper Selection ........................A–69 A.8.3.2 Applicable Jumper Data ......................A–70 A.8.4 Loopback Connection ........................A–71 A.8.5 Loop Thru ............................A–71 A.8.6 Connector Pinout Data ........................A–71 A.8.6.1...
  • Page 9 Preface SDM-2020 Satellite Demodulator Figures Figure 1-1. SDM-2020 Satellite Demodulator ......................1–1 Figure 1-2. Demodulator Block Diagram ........................ 1–2 Figure 1-3. Signal Level Characteristics – 4 Channel Input L-Band ..............1–10 Figure 1-4. Signal Level Characteristics –Single – Channel Input ................ 1–10 Figure 1-5.
  • Page 10 Table 3-5. (C+N)/N to C/N and E Conversion Chart ..................3–55 Table 3-6. Demodulator Fault Tree........................3–56 Table 3-7. SDM-2020 Demodulator Revision Emulation..................3–57 Table A-1. Minimum Software Revisions ......................A–2 Table A-2. 204 Data and Timing ..........................A–4 Table A-3. EIA-422 Interface Specifications......................A–6 Table A-4.
  • Page 11 Preface SDM-2020 Satellite Demodulator Table A-22. Fault Signal Definitions ........................A–38 Table A-23. G.703 Specification .......................... A–44 Table A-24. RX Data Rate 1.544 Mbit/s....................... A–46 Table A-25. RX Data Rate 2.048 Mbit/s....................... A–46 Table A-26. RX Data Rate 6.312 Mbit/s....................... A–47 Table A-27.
  • Page 12 Update Appendix B Remote Specification to FW/6224-1P. About this Manual This manual provides installation and operation information for the Comtech EFData SDM-2020 satellite demodulator. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the SDM-2020.
  • Page 13 Preface SDM-2020 Satellite Demodulator 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 unsafe practices or risks of property damage.
  • Page 14 SDM-2020 Satellite Demodulator Preface European EMC Directive In order to meet the European Electro-Magnetic Compatibility (EMC) Directive (EN55022, EN50082-1), properly shielded cables for DATA I/O are required. More specifically, these cables must be shielded from end-to-end, ensuring a continuous ground shield.
  • Page 15 Preface SDM-2020 Satellite Demodulator Warranty Policy This Comtech EFData product is warranted against defects in material and workmanship for a period of one year from the date of shipment. During the warranty period, Comtech EFData will, at its option, repair or replace products that prove to be defective.

  • Page 16: Chapter 1. Introduction

    Chapter 1. INTRODUCTION This chapter provides an overview, internal assembly tables, and specifications for the SDM-2020 satellite demodulator, referred to in this manual as “the demodulator.” Overview The SDM-2020 (Figure 1-1) is a programmable; variable-rate satellite demodulator used for digital video and high-speed data applications. The demodulator supports open...

  • Page 17: Figure 1-2. Demodulator Block Diagram

    Introduction SDM-2020 Satellite Demodulator The modulator and demodulator are intended for use in commercial applications for transmission and reception of digitized video signals. The basic digitized video format supported is defined by the Moving Pictures Experted Group-2 (MPEG-2) (see ISO/IEC DIS 13818-1, Coding of moving pictures and associated audio).
  • Page 18 SDM-2020 Satellite Demodulator Introduction 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 (2- or 4-wires) for remote control applications. A second rear panel 9-pin D connector provides fault/alarm status.

  • Page 19: Table 1-1. Unframed (187) Mode

    Introduction SDM-2020 Satellite Demodulator Refer to Table 1-1 for the Min/Max data and symbol rates for unframed (187) Mode. Table 1-1. Unframed (187) Mode Minimum Maximum Minimum Maximum Data Rate Data Rate Symbol Rate Symbol Rate Code Rate (bit/s) (bit/s)
  • Page 20 SDM-2020 Satellite Demodulator Introduction Data and symbol rates become effective January 1999. Rev. 3 1–5...

  • Page 21: Assemblies

    Introduction SDM-2020 Satellite Demodulator Assemblies 1.2.1 Demodulator The demodulator consists of the assemblies listed in Table 1-5. Table 1-5. EFData Module Part Numbers Part Number Description Comment PL/5746 Demodulator Assembly PL/5782 IF Module, 75Ω PL/6169 Front Panel Assembly PL/6170 SDM-2020 Top Assembly...

  • Page 22: Fast Options

    SDM-2020 Satellite Demodulator Introduction 1.2.3 FAST Options Certain options are enabled using EFData’s Fully Accessible System Topology (FAST) features described in Appendix C. The software requirements for the FAST options are also listed in Appendix C. Options include: • Original Equipment Manufacturer (OEM) LCD (See Appendix B) •...
  • Page 23 Introduction SDM-2020 Satellite Demodulator Table 1-6. Demodulator Specifications (Continued) General Specifications Unit Cooling Exhaust fan located on left of unit when viewed from the rear. Front Panel Interface Keypad + LCD with back lighting Remote Control Interface Programmable selection for: EIA-232, EIA-485 (2- or 4-Wire), 9-pin D female...
  • Page 24 SDM-2020 Satellite Demodulator Introduction 1.3.2 L-Band and 70/140 MHz Input Demodulator Charactistics Refer to Table 1-7 for single L-Band charactistics. Table 1-8. L-Band and 70/140 MHz Input Demodulator Characteristics Demodulator Specification Parameter Single L-Band Input 4 L-Band Inputs Signal 70/140 MHz...

  • Page 25: Remote Port And M&C Specifications

    Introduction SDM-2020 Satellite Demodulator 1.3.3 Remote Port and M&C Specification Refer to Table 1-8 for remote port and M&C specifications. Table 1-9. Remote Port and M&C Specifications Remote Port and M&C Specifications M&C Port Remote Control: ASYNC Serial Interface EIA-485 (2/4-wire) or EIA-232...
  • Page 26 SDM-2020 Satellite Demodulator Introduction Carrier Level (vs) Symbol Rate Maximum Level 4 Input Unit Minimum Level 1 Input Unit Symbol Rate (Msym/s) ant_pwr2.xls Figure 1-3. Signal Level Characteristics –L-Band Carrier Level (vs) Symbol Rate Maximum Level Minimum Level 1 Input Unit Symbol Rate (Msym/s) ant_pwr2.xls...

  • Page 27: Ber Performance

    Introduction SDM-2020 Satellite Demodulator BER Performance 1.4.1 QPSK with Reed-Solomon Coding Refer to Table 1-9 and Figure 1-5. Table 1-10. QPSK with Reed-Solomon Coding 1.4.2 8PSK Reed-Solomon Coding Note: For 8PSK – 8/9 at symbol rates > 30 Msym/s add 0.4 dB.

  • Page 28: Figure 1-5. Qpsk (1/2, 2/3, 3/4, 5/6, 7/8 Rates) With Reed-Solomon

    SDM-2020 Satellite Demodulator Introduction Specification 3/4 Rate 2/3 Rate 5/6 Rate 1/2 Rate 7/8 Rate 10.0 11.0 (dB) Figure 1-5. QPSK (1/2, 2/3, 3/4, 5/6, 7/8 Rates) with Reed-Solomon Rev. 3 1–13...

  • Page 29: Figure 1-6. 8Psk (2/3, 5/6, 8/9 Rates) With Reed-Solomon

    Introduction SDM-2020 Satellite Demodulator Specification 8/9 Rate < 30 Msym/s 2/3 Rate 5/6 Rate 8/9 Rate > 30 Msym/s 10.0 11.0 (dB) Figure 1-6. 8PSK (2/3, 5/6, 8/9 Rates) With Reed-Solomon 1–14 Rev. 3...
  • Page 30 SDM-2020 Satellite Demodulator Introduction Figure 1-7. 16QAM (3/4, 7/8) Reed-Solomon Decoder Rev. 3 1–15...

  • Page 31: Sdm-2020 Demodulator Envelope

    Refer to Figure 1-8 for unit envelope Note: All dimensions are in inches, metrics are referenced in parentheses. 14.0 (35.56) 14.0 (35.56) 1.75 16.1 (40.94) (4.45) 19.0 (48.26) * = older chassis 1.25 ** = Newer chassis (3.18) Figure 1-8. SDM-2020 Demodulator Envelope 1–16 Rev. 3...
  • Page 32 SDM-2020 Satellite Demodulator Introduction This page is intentionally left blank. Rev. 3 1–17...

  • Page 33: Chapter 2. Installation

    Chapter 2. INSTALLATION This chapter provides unpacking and installation instructions, and a description of external connections. The equipment contains parts and assemblies sensitive to damage by Electrostatic Discharge (ESD). Use ESD precautionary procedures when touching, removing, or inserting PCBs. CAUTION Unpacking The demodulator and manual are packaged in pre-formed, reusable, cardboard cartons containing foam inserts for maximum shipping protection.

  • Page 34: Installation

    Note: If there is any problem with the installation, contact EFData’s Customer Support Department. A complete demodulator consists of the SDM-2020 main unit and an optional plug-in data interface. The demodulator is shipped with the data interface installed in the main unit.

  • Page 35: Figure 2-1. Typical Rack Installation

    SDM-2020 Satellite Demodulator Installation Figure 2-1. Typical Rack Installation Rev. 3 2–3...

  • Page 36: Data Interfaces

    Installation SDM-2020 Satellite Demodulator 2.2.1 Data Interfaces Note: Refer to Appendix A for available data interfaces. To avoid damaging the demodulator, always disconnect the power before removing or installing a data interface. CAUTION The data interface is a removable, plug-in module that provides a terrestrial connection to the demodulator.

  • Page 37: Data Interface Removal

    SDM-2020 Satellite Demodulator Installation Note: After a different interface type has been installed, the demodulator recognizes the change upon power up, and defaults to valid parameters for the new interface. 2.2.1.1 Data Interface Removal 1. Disconnect power from the demodulator.

  • Page 38: External Connections

    Installation SDM-2020 Satellite Demodulator External Connections The connectors for the main unit are shown in Figure 2-3 or Figure 2-4 and Rear Panel RF Input Connectors (Table 2-1). The connectors for each plug-in data interface are described in Appendix A.

  • Page 39: Connector Pinout Definitions

    SDM-2020 Satellite Demodulator Installation Table 2-1. Rear Panel Connectors Name Ref. Desig. Type Function Remote 9-pin D, Female Remote control (M&C) Fault 9-pin D, Female Relay Faults Monitor 9 pin D, Female Performance Monitor IF Input (Single-Channel) Type F, Female RX IF input, LNB power out.

  • Page 40: Remote Connector And Pinout (J1)

    Installation SDM-2020 Satellite Demodulator 2.3.2 Remote Connector and Pinout (J1) The remote control connection is a 9-pin female D connector located on the rear panel of the demodulator. Screw locks are provided for mechanical security of the mating connector. The remote connector provides a way for issuing commands and determining the unit’s status.

  • Page 41: Fault Connector (J2)

    SDM-2020 Satellite Demodulator Installation 2.3.3 Fault Connector (J2) The fault interface connection is a 9-pin female D connector located on the rear panel of the demodulator. 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 Demodulator and Common Equipment.

  • Page 42: Monitor Points (J21)

    Installation SDM-2020 Satellite Demodulator 2.3.4 Monitor Points (J21) The monitor points are located on a 9-pin D Sub female-connector at the rear of the unit. The monitor functions are an aid to evaluate performance. Refer to Table 2-4 for connector characteristics.

  • Page 43: Receive If Input Connector

    SDM-2020 Satellite Demodulator Installation 2.3.5 Receive IF Input Connector 2.3.5.1 Single L-Band Input (J23) The RX IF Input connector (J23) is a 75Ω, F-type female connector. LNB power is provided at connector (J23) and can be disabled from the front panel controls or remote M&C control.

  • Page 44: Fuse Data

    Installation SDM-2020 Satellite Demodulator 2.3.7 Fuse Data Fuse Type Littlefuse 215002 5 x 20 mm Fuse T2A H250V Time Delay, 2A, High Breaking Capacity Double Pole (Approved to IEC 127, Sheet V and Underwriters Laboratories) To replace a fuse, proceed as follows: 1.

  • Page 45: Chapter 3. Operation

    For remote control operation information, refer to Appendix B. Introduction The SDM-2020 demodulator has three general modes of operation controlled by the DVB Framing Type command in the Configuration Interface menu. Refer to Table 3-1 for a description of the three modes.

  • Page 46: Front Panel

    Operation SDM-2020 Satellite Demodulator Front Panel The demodulator front panel (Figure 3-1), enables the user to control demodulator configuration parameters and display the demodulator status. Demodulator ENTER POWER ON ADAPTIVE BROAD BAND SYNC FAULTS ALARMS RECEIVE CARRIER DETECT CLEAR STORED...

  • Page 47: Led Indicators

    SDM-2020 Satellite Demodulator Operation 3.2.1 LED Indicators The seven LEDs on the front panel indicate: • Alarms • Summary fault information • General demodulator status Refer to Table 3-2 for indicator descriptions. Table 3-2. LED Indicator Description, Front Panel Name...

  • Page 48: Front Panel Keypad

    Operation SDM-2020 Satellite Demodulator 3.2.2 Front Panel Keypad The front panel keypad (Figure 3-2), permits local operation of the demodulator. The keypad consists of six keys. Each key provides one or more logical functions. ENTER CLEAR Figure 3-2. Keypad ENTER This key is used to select a displayed function or to execute a demodulator configuration change.

  • Page 49: Menu System

    SDM-2020 Satellite Demodulator Operation Menu System To access and execute all functions, refer to Figure 3-3 through Figure 3-15. Use the main menu (Figure 3-3) as a quick reference for accessing the demodulator functions. When prime power is applied to the demodulator, the base level of the menu system displays the sign-on message: •...

  • Page 50: Figure 3-3. Main Menu

    Operation SDM-2020 Satellite Demodulator SDM-2020 DEMOD VER: 20.1.1 FUNCTION SELECT FUNCTION SELECT FUNCTION SELECT FUNCTION SELECT STORED FUNCTION SELECT MONITOR FAULTS/ALARMS CONFIGURATION FLTS/ALMS UTILITY (Figure 3-8) (Figure 3-9) (Figure 3-10) CONFIGURATION UTILITY Without G.703 Data Interface DEMODULATOR DEMODULATOR (Figure 3-4)

  • Page 51: Configuration Menus

    SDM-2020 Satellite Demodulator Operation 3.3.1 Configuration Menus Demodulator configuration can be viewed or changed by entering the Configuration level from the Function Select menu on the front panel. After entering the Configuration menu, press [←] or [→] to select: •...

  • Page 52: Figure 3-4. Configuration Demodulator Menu Without G.703 Data Interface

    Operation SDM-2020 Satellite Demodulator SDM-2020 DEMOD FUNCTION SELECT CONFIGURATION VER: X.X.X CONFIGURATION DEMODULATOR RX-DR QPSK 1/2 RX-SR QPSK 1/2 RX-IF FREQUENCY RX-IF FREQUENCY (Data Rate) (Symbol rate) QPSK 1/2, 2/3, 3/4, 5/6,7/8 QPSK 1/2, 2/3, 3/4, 5/6,7/8 950 to 1750 MHz...

  • Page 53: Figure 3-4A. Configuration Demodulator Menu With G.703 Data Interface

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT CONFIGURATION VER: X.X.X CONFIGURATION DEMODULATOR RX-DR QPSK 3/4 RX-SR QPSK 3/4 RX-IF FREQUENCY RX-IF FREQUENCY (Data Rate) (Symbol rate) 950 to 1750 MHz 50 to 180 MHz Code Rate Data Rate QPSK 1/2, 3/4, 7/8, 2/3, 5/6 (in 2.5 kHz steps)

  • Page 54: Configuration Demodulator Menu

    Operation SDM-2020 Satellite Demodulator 3.3.1.1 Configuration Demodulator Menu Refer to Figure 3-4. RX-DR QPSK 1/2 Notes: Figure 3-4 is reflective of the demodulator menu without G.703 data interface installed. Figure 3-4A is reflective of the demodulator menu with G.703 data interface installed.
  • Page 55 SDM-2020 Satellite Demodulator Operation RX-IF FREQUENCY For L-Band only: Programs the demodulator receive frequency between 950 to 1750 MHz, in 2.5 kHz steps. For 70/140 MHz only: Programs the demodulator receive frequency between 50 to 90 MHz and 100 to 180 MHz, in 2.5 kHz steps.
  • Page 56 Operation SDM-2020 Satellite Demodulator E b /N 0 THRESH ALM Programs the Eb/No THRESH ALM ON or OFF. When Off is selected, this function is disabled. When On is selected, the ALARM LED and ALARM Rely are activated when the measured E falls below the programmed E THRESHOLD.
  • Page 57 SDM-2020 Satellite Demodulator Operation This page is intentionally left blank. Rev. 3 3–13...
  • Page 58 Operation SDM-2020 Satellite Demodulator SDM-2020 DEMOD FUNCTION SELECT CONFIGURATION VER: X.X.X CONFIGURATION INTERFACE RX CLOCK PHASE RX DATA PHASE RX DATA FAULT DVB FRAMING TYPE NORMAL NONE NORMAL INVERT INVERT DATA STABLE NONE (Not applicable if G.703 is installed.) EXT-REF FREQ...

  • Page 59: Configuration Interface Menu

    SDM-2020 Satellite Demodulator Operation 3.3.1.2 Configuration Interface Menu Refer to Figure 3-5. RX CLOCK PHASE Programs Receive Clock phase to NORMAL or INVERT. On entry, the current setting for the RX Clock Phase is displayed. Press [↑] or [↓] to select NORMAL or INVERT. Press [ENTER] to execute the change.
  • Page 60 Operation SDM-2020 Satellite Demodulator INTF LOOPBACK Programs the modem for interface loopback operation. Note: Available in ASI, ASI/LVDS, G.703, or SMPTE 310M interface. On entry, the current status of interface loopback is displayed. Press [↑] or [↓] to make the selection. Press [ENTER] to execute the change.

  • Page 61: Configuration Save Menu

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT CONFIGURATION VER: X.X.X CONFIGURATION SAVE MENU CONFIGURATION xx SAVE Key: ACCESS TO CONDITIONAL OR Parameter Information SUBMENU OPTION-DEPENDENT xx = 1 to 10 Figure 3-6. Configuration Save Menu 3.3.1.3 Configuration Save Menu Refer to Figure 3-6.

  • Page 62: Configuration Recall Menu

    Operation SDM-2020 Satellite Demodulator SDM-2020 DEMOD FUNCTION SELECT CONFIGURATION VER: X.X.X CONFIGURATION RECALL MENU CONFIGURATION xx RECALL Key: ACCESS TO CONDITIONAL OR Parameter Information xx = 1 to 10 SUBMENU OPTION-DEPENDENT Figure 3-7. Configuration Recall Menu 3.3.1.4 Configuration Recall Menu Refer to Figure 3-7.

  • Page 63: Figure 3-8. Monitor Menu

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT VER: X.X.X MONITOR RAW BER CORRECTED BER EB/NO EB/NO MARGIN Current Data Current Corrected BER Current Eb/No (Low Limit: based on (Low Limit: based on (Low Limit: based on E/b/No MARGIN =...

  • Page 64: Monitor

    Operation SDM-2020 Satellite Demodulator 3.3.2 Monitor Refer to Figure 3-8. When the Monitor level is entered, press [←] or [→] to select the desired monitor function. Each monitor function is displayed in real time as long as it is selected.
  • Page 65 SDM-2020 Satellite Demodulator Operation This page is intentionally left blank. Rev. 3 3–21...

  • Page 66: Faults/Alarms Menus

    Operation SDM-2020 Satellite Demodulator 3.3.3 Faults/Alarms Menus Refer to Figure 3-9. The Faults/Alarms level is accessible from the Function Select menu. These are similar to monitor functions, as the current status is displayed. Press [←] or [→] to move between the Fault/Alarm groups: •...

  • Page 67: Figure 3-9. Faults/Alarms Menu

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT VER:X.X.X FAULTS/ALARMS DEMODULATOR RX INTERFACE COMMON CARRIER DETECT BATTERY/CLOCK FRAME SYNC IF SYNTHESIZER -12 VOLT SUPPLY DATA STABLE/AIS I CHANNEL +12 VOLT SUPPLY CLOCK PLL Q CHANNEL +5 VOLT SUPPLY FIFO BER THRESHOLD...

  • Page 68: Demodulator Faults Menu

    Operation SDM-2020 Satellite Demodulator 3.3.3.1 Demodulator Faults Menu Refer to Figure 3-9. Fault/Alarm Possible Problem and Action CARRIER DETECT Carried Detect fault. Indicates the Viterbi/TCM decoder is not locked. This is the most common fault displayed in the demodulator. Any problem from the input data on the demodulator end of the circuit at the output of the decoder, can cause this fault.

  • Page 69: Configuration Faults Menu

    SDM-2020 Satellite Demodulator Operation 3.3.3.2 Configuration Faults Menu Refer to Figure 3-9. Fault/Alarm Possible Problem and Action CONFIGURATION Demodulator configuration fault. Indicates the demodulator module or interface does not support a programmed configuration parameter. This fault typically occurs when the programmed configuration is not supported by the module hardware.

  • Page 70: Receive Interface Faults Menu

    Operation SDM-2020 Satellite Demodulator 3.3.3.3 Receive Interface Faults Menu Refer to Figure 3-9. Fault/Alarm Possible Problem and Action FRAME SYNC Indicates that the demodulator cannot synchronize to the data in the selected framing mode. Ensure the correct framing mode is selected.

  • Page 71: Common Equipment Faults Menu

    SDM-2020 Satellite Demodulator Operation 3.3.3.4 Common Equipment Faults Menu Refer to Figure 3-9. Fault/Alarm Possible Problem and Action BATTERY/CLOCK M&C battery voltage or clock fault. Indicates a low voltage in the memory battery. Note: Typically will be active when a demodulator has been Hard Reset, or the firmware has been changed, and the demodulator is first turned On.
  • Page 72 Operation SDM-2020 Satellite Demodulator This page is intentionally left blank. 3–28 Rev. 3...

  • Page 73: Figure 3-10. Stored Faults/Alarms Menu

    SDM-2020 Satellite Demodulator Operation FUNCTION SELECT SDM-2020 DEMOD STORED VER:X.X.X FLTS/ALMS UNAVAIL DEMODULATOR x RX INTERFACE x COMMON x SECONDS x STORED TIME/DATE STORED TIME/DATE STORED TIME/DATE HH:MM:SS/MM-DD-YYYY HH:MM:SS/MM-DD-YY HH:MM:SS/MM-DD-YY HH:MM:SS/MM-DD-YY (FAULT LABEL) (FAULT LABEL) (FAULT LABEL) FRAME SYNC CARRIER DETECT...

  • Page 74: Stored Faults/Alarms Menus

    Operation SDM-2020 Satellite Demodulator 3.3.4 Stored Faults/Alarms Menus Refer to Figure 3-10. The demodulator stores the first 10 (Flt0 through Flt9) occurrences of fault status changes in each of the four major fault categories. Each fault status change is stored with the time and date of the occurrence.
  • Page 75 SDM-2020 Satellite Demodulator Operation This page is intentionally left blank. Rev. 3 3–31...

  • Page 76: Utility Menus

    Operation SDM-2020 Satellite Demodulator 3.3.5 Utility Menus The Function Select Utility menu is divided into the following categories: • Demodulator • Interface • System • Demodulator Options • Factory Setup - (Factory Use Only) After entering the Utility functions level, press [←] or [→] to select the desired Utility menu, and press [ENTER].

  • Page 77: Figure 3-11. Utility Demodulator Menu

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT UTILITY VER: X.X.X UTILITY DEMODULATOR DEMODULATOR TYPE Key: ACCESS TO CONDITIONAL OR Parameter Information SUBMENU OPTION-DEPENDENT Figure 3-11. Utility Demodulator Menu Rev. 3 3–33...

  • Page 78: Utility Demodulator Menu

    Operation SDM-2020 Satellite Demodulator 3.3.5.1 Utility Demodulator Menu Refer to Figure 3-11. DEMODULATOR Programs the demodulator to DVB or DBS framing mode. TYPE • DVB: Sync pulse is one byte wide. • DBS: 204 framing and Serial mode operation sync pulse is one bit clock wide.

  • Page 79: Figure 3-12. Utility Interface Menu

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT UTILITY VER: X.X.X UTILITY INTERFACE INTERFACE TYPE RS422 LVDS ASI/RS422 ASI/LVDS ECL_RX G.703 SMPTE_310M NONE UNKNOWN Key: ACCESS TO CONDITIONAL OR Parameter Information SUBMENU OPTION-DEPENDENT Figure 3-12. Utility Interface Menu Rev. 3...

  • Page 80: Figure 3-12A. Utility Interface Menu, Rs422 Data Interface

    Operation SDM-2020 Satellite Demodulator UTILITY SDM-2020 DEMOD FUNCTION SELECT INTERFACE VER: X.X.X UTILITY RS422 RS422 INT SELECT INTF MODE SELECT DM STATE RR STATE SERIAL NORMAL NORMAL PARALLEL INVERT INVERT (Only displayed with DVB selected.) Key: ACCESS TO CONDITIONAL OR...
  • Page 81 SDM-2020 Satellite Demodulator Operation UTILITY SDM-2020 DEMOD FUNCTION SELECT INTERFACE VER: X.X.X UTILITY LVDS INTERFACE MODE Key: SELECT ACCESS TO CONDITIONAL OR Parameter Information SUBMENU OPTION-DEPENDENT SERIAL PARALLEL Figure 3-12B. Utility Interface, LVDS UTILITY SDM-2020 DEMOD FUNCTION SELECT INTERFACE VER: X.X.X...
  • Page 82 Operation SDM-2020 Satellite Demodulator UTILITY SDM-2020 DEMOD FUNCTION SELECT INTERFACE VER: X.X.X UTILITY ASI/LVDS RX INTF FIRMWARE RX INTF FIRMWARE INTERFACE SELECT LVDS STATUS (J7) FW/NNNNRR FW/NNNNRR RX LVDS MM/DD/YYYY DISPLAYS CURRENT TX LVDS LVDS RX FW REVISION PRESS <CLEAR> TO (Jumper Setting EXIT DATE MENU.
  • Page 83 SDM-2020 Satellite Demodulator Operation UTILITY SDM-2020 DEMOD FUNCTION SELECT FRAMING INTERFACE VER: X.X.X UTILITY STRUCTURE G.703 INTERFACE 1544 2048 6312 8448 G.743 G.742 G.747 G.745 NONE NONE NONE NONE G.704 G.704 G.704 G.704 51840 44736 32064 34368 G.751 STS-1 G.752 G.752...
  • Page 84 Operation SDM-2020 Satellite Demodulator UTILITY SDM-2020 DEMOD FUNCTION SELECT INTERFACE VER: X.X.X UTILITY SMPTE_310M RX INTF FIRMWARE TX INTF FIRMWARE Key: FW/NNNNRR FW/NNNNRR ACCESS TO CONDITIONAL OR Parameter Information SUBMENU OPTION-DEPENDENT MM/DD/YYYY MM/DD/YYYY (PRESS <CLEAR> TO (PRESS <CLEAR> TO EXIT DATE MENU.) EXIT DATE MENU.)

  • Page 85: Utility Interface Menu

    SDM-2020 Satellite Demodulator Operation 3.3.5.2 Utility Interface Menu Refer to Figure 3-12. INTERFACE TYPE Displays the interface type installed in the demodulator, for example: • RS422 • LVDS • ASI/RS422 • ASI/LVDS • ECL/HSSI_RX • G.703 • SMPTE 310M •...

  • Page 86: Utility Interface Menu, Rs422

    Operation SDM-2020 Satellite Demodulator 3.3.5.2.1 Utility Interface Menu, RS422 Refer to Figure 3-12A. INTERFACE SELECT Displays the current Interface Select, either DVB or 530. Upon entry, the current status is displayed. Press [↑] or [↓] to change the selection. Press [ENTER] to execute the change.

  • Page 87: Utility Interface Menu, Asi/Lvds

    SDM-2020 Satellite Demodulator Operation 3.3.5.2.3 Utility Interface, ASI/RS422 Refer to Figure 3-12C. INTERFACE SELECT Displays the current Interface Select, either ASI or RS422. Upon entry, the current status is displayed. Press [↑] or [↓] to change the selection. Press [ENTER] to execute the change.

  • Page 88: Utility Interface Menu, Smpte 310M

    Operation SDM-2020 Satellite Demodulator 3.3.5.2.6 Utility Interface, G.703 Refer to Figure 3-12F. FRAMING STRUCTURE: 1544 NONE, G.704 2048 NONE, G.704 6312 None, G.704, G.743, G.747 8448 None, G.704, G.745, G.742 3206 None, G.752 34368 None, G.751, G.753 44736 None, G.752...

  • Page 89: Figure 3-13. Utility System Menu

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT UTILITY VER: X.X.X UTILITY SYSTEM TIME: HH:MM:SS AM/PM REMOTE BAUD RATE REMOTE ADDRESS REMOTE TYPE DATE: MM/DD/YYYY PARITY Current time and date. 1 to 255 RS485 (4-WIRE) 300, 600, 1200, 2400, 4800...

  • Page 90: Utility System Menu

    Operation SDM-2020 Satellite Demodulator 3.3.5.3 Utility System Menu Refer to Figure 3-13. TIME/DATE Time of day and date set/display function. The current time and date in the demodulator memory are displayed when selected. To set the demodulator time and/or date, press [ENTER]. Press [←] or [→] to position the flashing cursor over the parameter to be changed.
  • Page 91 SDM-2020 Satellite Demodulator Operation DISPLAY Set the contrast level of the front panel display. CONTRAST Press [ENTER] in order to change the contrast of the front panel display. Press [↑] or [↓] to increment or decrement the number at the flashing cursor from 0 to 100.
  • Page 92 Operation SDM-2020 Satellite Demodulator This page is intentionally left blank. 3–48 Rev. 3...

  • Page 93: Figure 3-14. Utility Demodulator Options Menu

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT UTILITY VER: X.X.X UTILITY DEMOD OPTIONS REV EMULATION DEMOD OPTIONS MODEM EMULATION DEMOD SERIAL # (Status Only) FUNCTIONAL x DISABLED (Status Only) CURRENT VERSION EMULATION VERSION OEM LCD (- or +) 8PSK...

  • Page 94: Utility Demodulator Options Menu

    Operation SDM-2020 Satellite Demodulator 3.3.5.4 Utility Demodulator Options Menu Refer to Figure 3-14. REV EMULATION Programs an 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.

  • Page 95: Utility Factory Setup Menu

    SDM-2020 Satellite Demodulator Operation SDM-2020 DEMOD FUNCTION SELECT VER: X.X.X UTILITY UTILITY Key: FACTORY SET-UP ACCESS TO CONDITIONAL OR Parameter Information SUBMENU OPTION-DEPENDENT Factory Setting Only. Figure 3-15. Utility Factory Setup Menu 3.3.5.5 Utility Factory Setup Menu Refer to Figure 3-15.

  • Page 96: Initial Defaults

    Operation SDM-2020 Satellite Demodulator Initial Defaults Initial default settings for the demodulator are listed in Table 3-4. Table 3-4. Initial Defaults Configuration Demodulator Demodulation/Code Rate QPSK 1/2 Energy Dispersal (see Note 1) Data Rate 15.000000 Mbit/s RS Decoder Corr On...
  • Page 97 SDM-2020 Satellite Demodulator Operation Table 3-4. Initial Defaults (Continued) ASI/LVDS Interface Type Interface Select RX INTF Firmware MM/DD/YYYY RX INTF Firmware FW/NNNNRR LVDS Status RX LVDS ECL/HSSI RX Interface Type DTE Status Unavailable G.703 Interface Type 1544 Framing Structure G.704 34368 Framing Structure G.751...

  • Page 98: (C+N)/N To C/N And E Conversion

    Operation SDM-2020 Satellite Demodulator 3.4.1 (C+N)/N to C/N and E Conversion Table 3-5 provides conversions from (C+N)/N to E b /N 0 that are useful when evaluating satellite links with a spectrum analyzer. The following equations was used to build the conversion table.

  • Page 99: Table 3-5. (C+N)/N To C/N And E

    SDM-2020 Satellite Demodulator Operation Table 3-5. (C+N)/N to C/N and E Conversion Chart Modulation And Code Rate QPSK 8PSK 16QAM (C+N)/N Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No 3.35 3.70 2.45 1.94 1.49 1.27 0.69 -0.28 -0.56 -1.07...

  • Page 100: Fault Tree

    Operation SDM-2020 Satellite Demodulator Fault Tree Refer to Table 3-6 for fault tree description. Table 3-6. Demodulator Fault Tree SYNC COM EQ DEMODULATOR FLT RLY RX AIS INTERFACES (see Note) Carrier Detect IF Synthesizer I Channel Q Channel BER Threshold...

  • Page 101: Revision Emulation Operation Fw/6224-1

    Operation Revision Emulation Operation FW/6224-1 Note: The SDM-2020 Demodulator will use FW/7734-1, initiating at version 20.1.1. To program an emulation mode from FW/6224-1,Version 1.1.1 through the current version, use the revision emulation feature in the Utility Modem Type menu. Refer to Table 3-7.

  • Page 102: Appendix A. Data Interfaces

    Appendix A. DATA INTERFACES This appendix describes the plug-in data interface modules used with the SDM-2020 Demodulator. Description Note: The SDM-2020 Demodulator incorporating PCB, AS/7733 will have available any of the following interfaces. The data interface is a plug-in module that provides a specific terrestrial connection to the demodulator unit.

  • Page 103: Interface/M&C Software Requirements

    A.1.1 Interface/M&C Software Requirements Note: This does not apply to SDM-2020 Demodulator incorporating PCB , AS/7733. As additional data interfaces are introduced, the software is revised to support the operation of each interface. Table A-1 summarizes the minimum software version necessary to operate each interface type.

  • Page 104: Figure A-1. 204 Byte Parallel Format

    SDM-2020 Satellite Demodulator Data Interfaces 1 Byte Sync 1 Byte Sync 187 Bytes Payload 16 RS Bytes DATA SYNC SYNC SYNC CLOCK DVALID Figure A-1. 204 Byte Parallel Format 8 Bits Sync 1496 Bits Payload 128 Bits RS 8 Bits Sync...

  • Page 105: Table A-2. 204 Data And Timing

    Data Interfaces SDM-2020 Satellite Demodulator Note: For proper operation, data and timing must be continuous, and meet the described criteria as specified in Figure A-1, and Table A-2. Table A-2. 204 Data and Timing DATA 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.

  • Page 106: Parallel/Serial Interface

    SDM-2020 Satellite Demodulator Data Interfaces RS-422 Parallel/Serial Interface The following paragraphs describe the RS-422 parallel and serial interface. The interface operates at RS-422 signal levels. It accommodates a variety of MPEG2 framing formats and EIA-530 serial data. A.2.1 Applicable Documents...

  • Page 107: Configuration

    Data Interfaces SDM-2020 Satellite Demodulator The following cables, or equivalent computer grade cables incorporating twisted, shielded pairs, are recommended: • Belden type LV Computer M9768 (50Ω) 15 pairs • Belden 8175 (100Ω) 15 pairs The Belden 8175 has lower capacitance; however, it has a larger diameter and requires the selection of an appropriate connector shell.
  • Page 108 SDM-2020 Satellite Demodulator Data Interfaces CONFIGURATION NOTE: (FACTORY SETTING) JUMPER SELECTS FOR PINS 2 & 15 OF THE J3 DVB PARALLEL/SERIAL REAR PANEL CONNECTOR J3 - 2 & 15 Figure A-3. RS-422 Interface Module PCB Rev.3 A–7...

  • Page 109: User Interfaces

    Data Interfaces SDM-2020 Satellite Demodulator A.2.4 User Interfaces The following paragraphs describe the RS-422 user interfaces. A.2.4.1 Parallel, J3, DB25 Female (DVB Parallel/Serial Data Interface) This data port supports DVB and DBS parallel and serial packetized data. There are three standard frame formats supported, as follows: •...

  • Page 110: Serial, J4, Db25 Female (Eia-530 Serial Data Interface

    SDM-2020 Satellite Demodulator Data Interfaces Table A-4. DVB Interface Connector Pinout, J3 Pin # Signal Function/Name Type Comment Clock A Mod/Demod System GND/REFCLKB O/GND Mod/Demod Jumper selectable SCT for Modulator Data 7 A(MSB/Serial) Mod/Demod Data 6 A Mod/Demod Data 5 A...

  • Page 111: Connector Pinouts, J4, Eia-530

    Data Interfaces SDM-2020 Satellite Demodulator A.2.4.2.1 Connector Pinouts, J4, EIA-530 The connector is a sub-miniature, 25-pin, female D connector, with threaded jack nuts (refer to Table A-5 for pinout). Signal functions are as defined in EIA-530. Notes: 1. The differential sense of all signals is a logic “1” when “B” is positive with respect to “A,”...

  • Page 112: Auxiliary, J5

    SDM-2020 Satellite Demodulator Data Interfaces A.2.4.3 Auxiliary, J5 This port provides for other modem-specific signals not otherwise defined for either or both of the two data connectors. A.2.4.3.1 Connector Pinout, J5 The connector is a sub-miniature, 9-pin, female D connector, with threaded jack nuts (refer to Table A-6 for connector pinout).

  • Page 113: Rs-422 Interface Front Panel Menus

    Data Interfaces SDM-2020 Satellite Demodulator A.2.5 RS-422 Interface Front Panel Menus If the RS-422 interface module is installed, the Utility Interface menu display commands specific to that interface. The RS-422-specific commands are depicted in Chapter 3, Utility Interface menu. A.2.6 RS-422 Interface Remote Control Commands Refer to Appendix B for a listing of RS-422 interface module remote control commands.

  • Page 114: Low Voltage Differential Signal (Lvds) Interface

    Low Voltage Differential Signal (LVDS) Interface The following paragraphs describe the LVDS interface. This plug-in module provides the physical and electrical interface between an SDM-2020 modulator or demodulator and DVB or DBS signal sources operating with LVDS electrical characteristics. In TM1449, this interface is called, “SPI.”...

  • Page 115: Table A-7. Lvds Specifications

    Data Interfaces SDM-2020 Satellite Demodulator • J5 Auxiliary connector (9-pin D, female): Provides transmit and receive clock references and open collector fault signals. The Transmit In or Receive Out interface is automatically enabled when the interface module is installed in the modulator or demodulator. The plug-in data interface is programmable for serial or parallel operation from either the front panel keypad or the remote port on the rear panel.

  • Page 116: Configuration

    SDM-2020 Satellite Demodulator Data Interfaces A.3.3 Configuration The interface (Figure A-4) provides DVB compliant operation when pins 2 and 15 are grounded using the “DVB Configuration” jumper settings described below. In a demodulator, the LVDS interface (J3) only has provision for DVB Configuration, and the Master Clock Input is not used.

  • Page 117: User Interfaces

    A.3.4.1.1 Connector Pinouts, J3 Note: Table A-8 provides applicable data for the SDM-2020 Demodulator. The connector is sub-miniature 25-pin D female, with threaded jack nuts. All signals for this connector are outputs from the Demodulator, except the signal pair on pins 2 and 15 (for an exception, see Figure A-4, for jumper settings).

  • Page 118: Connector Pinouts, J4

    SDM-2020 Satellite Demodulator Data Interfaces Table A-8. DVB Interface Connector Pinout, J3 Receive Out Pin # Signal Function/Name Type Comment Clock A Demod System GND I/GND Demod, LVDS Interface - N/A, jumper on GND only Data 7 A(MSB/Serial) Demod Data 6 A...

  • Page 119: Auxiliary, J5

    Data Interfaces SDM-2020 Satellite Demodulator Pin # Signal Function/Name Type Comment System GND/REFCLKB O/GND Mod, Jumper selectable SCT output for Modulator Data 7 A(MSB/Serial) Data 6 A Data 5 A Data 4 A Data 3 A Data 2 A Data 1 A...

  • Page 120: Lvds Interface Front Panel Menus

    SDM-2020 Satellite Demodulator Data Interfaces Single ended signals are open collector where: =12V max. And V =0.5V max. @ I =8 ma. A pull-up resistor, external to the equipment, is required. The fault signals, MF and DF, operate as follows: A fault is indicated by an “OFF”...
  • Page 121 Data Interfaces SDM-2020 Satellite Demodulator This page is intentionally left blank. A–20 Rev.3...

  • Page 122: Asi/Rs-422 (Asynchronous Serial Interface And Serial Data Interface

    A.4.2 Description This data interface is a plug-in module that inserts into the rear of the SDM-2020 modulator or demodulator chassis. It provides physical and electrical connection between the external terrestrial circuit and the internal circuitry of the modulator or demodulator.

  • Page 123: Figure A-6. Asi Module Assembly

    Data Interfaces SDM-2020 Satellite Demodulator BNC-F RECOVERY POWER RECOVERY, PROCESSING MODULATOR/ DEMODULATOR LEVEL TERRESTRIAL LOOPBACK INTERFACE TRANSLATORS INTERFACE ASI/EIA SELECTION M&C BNC-F GENERATOR Figure A-5. ASI/RS-422 Interface Block Diagram Figure A-6. ASI Module Assembly A–22 Rev.3...

  • Page 124: Table A-11. Asi/Rs-422 Specifications

    SDM-2020 Satellite Demodulator Data Interfaces A 75Ω coaxial cable (Belden 8281 or equivalent) is recommended for all ASI connectors. Typical coaxial cable length is up to 70 meters (230 feet) with good quality coaxial cable. Typical attenuation of up to 18 dB at 270 MHz is permitted.

  • Page 125: User Interfaces

    Data Interfaces SDM-2020 Satellite Demodulator Notes: 1. In loopback TX, data is routed through as much of the interface card as practicable before being returned to the RX interface. In a modulator chassis, TX data continues to enter the modulator and is transmitted during loopback. In the demodulator, satellite data is interrupted during loopback and the data entering the TX connector is returned to the RX connector.

  • Page 126: Receive Output Connectors, J6/J7, Bnc, Female

    SDM-2020 Satellite Demodulator Data Interfaces Single-ended signals (MF and DF fault signals) are open collector where: =12V max. and V =0.5V max. @ I =8 ma. A pull-up resistor, external to the equipment, is required. The fault signals, MF and DF, operate as follows: A fault is indicated by an “OFF” (high) and OK status is indicated by an “ON”...

  • Page 127: Asi/Rs-422 Interface Front Panel Menus

    Data Interfaces SDM-2020 Satellite Demodulator A.4.4 ASI/RS-422 Interface Front Panel Menus When the ASI/RS-422 interface is selected, only the commands that apply to that specific interface (ASI or RS-422) are displayed. Refer to Chapter 3, Utility Interface menu. A.4.5 ASI/RS-422 Remote Interface Commands Refer to Appendix B for a listing of ASI/RS-422 interface module remote control commands.

  • Page 128: Ecl/Hssi Interface

    SDM-2020 Satellite Demodulator Data Interfaces ECL/HSSI Interface This ECL/HSSI interface plug-in module provides the physical and electrical interface between an SDM-2020 modulator or demodulator and a serial ECL signal source operating with TIA/EIA-612 electrical characteristics. A.5.1 Applicable Documents Applicable specifications, as referenced herein, include:...

  • Page 129: Specifications

    (DBS-PS-007) no framing (187 bytes) format modes (Table A-14). Table A-15 summarizes the primary characteristics of each transport protocol. The SDM-2020 was designed to comply with these primary interface standards, however; custom interfaces can be supported as outlined in the data transfer modes definition section of this document.

  • Page 130: Table A-15. Terrestrial Transport Protocols

    The frame synchronization mode is not directly selectable by the user from the front panel interface. Refer to the SDM-2020 Modulator for synchronization mode. Serial Data Formats The processing order shall always start from the MSB (i.e. “0”) of the sync word-byte (i.e., 01000111).

  • Page 131: Figure A-7. 187 Byte (No Framing) Serial Format

    Data Interfaces SDM-2020 Satellite Demodulator 1496 Bits Payload DATA SYNC CLOCK DVALID High High Figure A-7. 187 Byte (no framing) Serial Format 8 Bits Sync 1496 Bits Payload 8 Bits Sync 0 1 0 0 0 1 0 0 DATA...

  • Page 132: Terrestrial Signal Definition

    SDM-2020 Satellite Demodulator Data Interfaces 8 Bits Sync 1496 Bits Payload 128 Bits RS 8 Bits Sync 0 1 0 0 0 1 0 0 DATA SYNC CLOCK DVALID Figure A-10. 204 Byte DBS Serial Format A.5.4.2 Terrestrial Signal Definition Refer to Table A-16 and Figure A-11 for HSSI pinout.

  • Page 133: Figure A-11. Ecl/Hssi Connector, Pin Location

    SDM-2020 Satellite Demodulator Bold signal function names are non-HSSI defined signals. On Cisco routers there is no connection to those pins. Reference the Comtech EF Data web site for an Application Note describing the use of the SDM-2020 with Cisco routers.

  • Page 134: Figure A-12. Hssi Signal Flow

    SDM-2020 Satellite Demodulator Data Interfaces Figure A-12. HSSI Signal Flow Terminal A “+” of the generator shall be positive with respect to terminal B “-” for a binary 1 or ON state. The B “-” terminal of the generator shall be positive with respect to the terminal A “+”...

  • Page 135: Terrestrial Extended Signal Definitions

    Data Interfaces SDM-2020 Satellite Demodulator A.5.4.3 Terrestrial Extended Signal Definitions The HSSI specification has no provision for SYNC or DVALID signals. If terrestrial data framing is desired, a sync byte (47 hex) is embedded into the data stream every 188 or 204 bytes, as selected in the modulator configuration.

  • Page 136: Terrestrial Data Rate

    SDM-2020 Satellite Demodulator Data Interfaces A.5.4.4 Terrestrial Data Rate The terrestrial interface supports synchronous data transfer rates from 1.5 to 70 Mbit/s. Notes: 1. EIA-612 (Electrical Characteristics for an Interface at Data Signaling Rates up to 52 Mbits/s) defines the electrical characteristics required for data transfers up to 52 Mbits/s utilizing ECL driver/receiver technology.

  • Page 137: Figure A-13. Nominal Interface Timing

    Data Interfaces SDM-2020 Satellite Demodulator Figure A-13 shows the nominal interface timing. CLOCK DATA SYNC DVALID Figure A-13. Nominal Interface Timing Use the timing diagram shown in Figure A-14 for the worst case interface timing specifications. CLOCK DATA SYNC DVALID Figure A-14.

  • Page 138: Terrestrial Tx Clock Phase

    SDM-2020 Satellite Demodulator Data Interfaces Table A-19. Transmit Timing Parameters Parameter Description Units Operating frequency (1/T) Clock period (1/f) nsec Clock pulse width nsec Setup time, DATA or SYNC to CLOCK nsec Hold time, CLOCK to DATA or SYNC invalid Nsec The timing parameters for the serial data receive interface are listed in Table A-20.

  • Page 139: Monitor And Control Functions

    Data Interfaces SDM-2020 Satellite Demodulator A.5.5 Monitor and Control Functions A.5.5.1 System Implementation Refer to Table A-21 for signal definition. Table A-21. Signal Definition Signal Definition TA (Data Terminal Equipment Available) These signals are inputs from the HSSI interface. The state of these inputs is LA (Loopback Circuit A) read by the M&C from the ECL/HSSI interface status register.

  • Page 140: Ecl/Hssi Interface Front Panel Menus

    SDM-2020 Satellite Demodulator Data Interfaces A.5.5.3 ECL/HSSI Interface Front Panel Menus Refer to Chapter 3, Utility Interface menu. A.5.5.4 ECL/HSSI Interface Remote Control Commands Refer to Appendix B for a listing of ECL/HSSI interface module remote control commands. Rev.3 A–39...
  • Page 141 Data Interfaces SDM-2020 Satellite Demodulator This page is intentionally left blank. A–40 Rev.3...

  • Page 142: G.703 Data Interface

    SDM-2020 Satellite Demodulator Data Interfaces G.703 Data Interface The following paragraphs describe the G.703 data interface. A.6.1 Applicable Documents Applicable documents, as referenced herein, include: • ITU-T G.703, Physical/Electrical Characteristics Of Hierarchical Digital Interfaces • ITU -T G.704, Synchronous Frame Structures Used At Primary And Secondary Hierarchical Levels •...

  • Page 143: Description

    A.6.2 Description The G.703 data interface is a plug-in module that inserts into the rear of the SDM-2020 Satellite Demodulator chassis. It provides physical and electrical connection between terrestrial data equipment and the internal circuitry of the demodulator. The interface is designed for full duplex capability and is automatically configured for simplex RX operation.

  • Page 144: Figure A-15. G.703 Block Diagram

    SDM-2020 Satellite Demodulator Data Interfaces SD IN G.703 CLK AND DATA G.703 RECOVERY 75Ω POWER LOOPBACK AUXILIARY PROCESSING MODULATOR/ DEMODULATOR CONTROL INTERFACE RR (CD) EXT CLK M&C 75Ω RD OUT G.703 CLK AND DATA G.703 DRIVER 75Ω Figure A-15. G.703 Block Diagram Figure A-16.

  • Page 145: G.703 Specifications

    Data Interfaces SDM-2020 Satellite Demodulator A.6.3 Specifications Table A-23 is a summary of the G.703 data interface specifications, demodulator application. Table A-23. G.703 Specification G.703 Specifications General Per ITU-T G.703 where applicable unless otherwise specified • Data Rates (programmable) 1.544 Mbit/s •...
  • Page 146 SDM-2020 Satellite Demodulator Data Interfaces Table A-23. G.703 Specification (Continued) G.703 Specifications (Continued) External Reference Clock Input Signal Characteristics Sine wave or square wave with duty cycle of 50% (± 10%) Input Amplitude 0.5 to 5.0V peak to peak 75Ω ± 5%...

  • Page 147: Receive Specifications

    Data Interfaces SDM-2020 Satellite Demodulator A.6.4 Receive Specifications The following receive specifications apply when the G.703 data interface is installed in an SDM-2020 Demodulator. A.6.4.1 Receive Data Rate 1.544 Mbit/s Specifications Refer to Table A-26 for data rate specifications. Table A-24. RX Data Rate 1.544 Mbit/s...

  • Page 148: Receive Data Rate 6.312 Mbit/S Specifications

    SDM-2020 Satellite Demodulator Data Interfaces A.6.4.3 Receive Data Rate 6.312 Mbit/s Specifications Refer to Table A-26 for data rate specifications. Table A-26. RX Data Rate 6.312 Mbit/s Parameter Specification 6.312 Mbit/s, ± 30 ppm Data Rate Line Coding B8ZS and AMI at 6.312 Mbit/s Pulse Shape Rectangular per ITU-T-G.703, Figure 12/G.703.

  • Page 149: Receive Data Rate 32.064 Mbit/S Specifications

    Data Interfaces SDM-2020 Satellite Demodulator A.6.4.5 Receive Data Rate 32.064 Mbit/s Specifications Refer to Table A-28 for data rate specifications. Table A-28. RX Data Rate 32.064 Parameter Specification 32.064 Mbit/s, ± 10 ppm Data Rate Line Coding HDB3 and AMI at 32.064 Mbit/s Pulse Shape Per ITU-T-G.703...

  • Page 150: Receive Data Rate 44.736 Mbit/S Specifications

    SDM-2020 Satellite Demodulator Data Interfaces A.6.4.7 Receive Data Rate 44.736 Mbit/s Specifications Refer to Table A-30 for data rate specifications. Table A-30. RX Data Rate 44.736 Parameter Specification 44.736 Mbit/s, ± 20 ppm Data Rate Line Coding B3ZS and AMI at 44.736 Mbit/s Pulse Shape Per ITU-T-G.703, Figure 14/G.703...

  • Page 151: Receive Doppler/Plesiochronous Buffer Specifications

    Data Interfaces SDM-2020 Satellite Demodulator A.6.5 Receive Doppler/Plesiochronous Buffer Specifications A.6.5.1 Buffer Size The operator can set the buffer size, ranging from 2 milliseconds to 32 milliseconds, in 2 millisecond steps. There is also a buffer bypass selection, buffer size of 0 milliseconds.

  • Page 152: Buffer Centering

    SDM-2020 Satellite Demodulator Data Interfaces A.6.5.5 Buffer Centering The unit provides buffer centering capability. The buffer can be set to 50% by the operator via the front panel. Buffer centering also occurs automatically after each of the following: receive signal acquisition, change in buffer size, change in buffer reference, and an overflow/underflow condition.

  • Page 153: Interface Loop - Through

    The interface provides a “Loop-Through” mode of operation. The loop-through mode is intended to allow synchronization of RX data (RD) to send data (SD) when an SDM-2020 demodulator and a SDM-2020 modulator are co-located (see Figure A-17) Loop-through mode is selectable only when the G.703 interface is installed in an SDM- 2020 modulator.

  • Page 154: Test Modes

    Send data (SD) is routed through as much of the interface circuitry as possible before being returned to the receive data (RD) output. This mode of operation does not disrupt transmission of data over the satellite link when installed in an SDM-2020 modulator. Rev.3...

  • Page 155: Terrestrial Interface Types

    Data Interfaces SDM-2020 Satellite Demodulator A.6.8 Terrestrial Interface Types A.6.8.1 Send Data (SD), Receive Data (RD), and External Clock Connectors J3, J4 & J6 The Send Data (SD) (J3), Receive Data (RD) (J4) and Ext. Clock (J6) connectors are all BNC type connectors, and are terminated into 75Ω.

  • Page 156: Environmental Requirements

    SDM-2020 Satellite Demodulator Data Interfaces Table A-33. G.703 Auxiliary Connector Pinout Auxiliary Connector Pinout Signal Function Name Pin # Type Comment Signal Ground Demod Fault Indicator Demodulator Summary Fault Redundancy switch application, TTL open collector output Not Used 3, 5, 8, 9...
  • Page 157 Data Interfaces SDM-2020 Satellite Demodulator This page is intentionally left blank. A–56 Rev.3...

  • Page 158: Smpte 310M/Ssi Data Interface

    This plug-in module provides the physical and electrical interface between external terrestrial data equipment and the demodulator. The SMPTE-310M data interface is based on the DVB’s Synchronous Serial Interface (SSI) used with the SDM-2020 Demodulator developed for video and high-speed data applications. The data is input/output on a BNC female connector as an 800-mV signal with biphase mark encoding.

  • Page 159: Figure A-18. Smpte 310M Interface Block Diagram

    Data Interfaces SDM-2020 Satellite Demodulator 96 Pin SMPTE 310 Data Recovery 75 Ohm BNC-F Power Modulator / Signal Demodulator Level Terrestrial Loopback Interface Translators Interface Processing M&C Data SMPTE 310 75 Ohm Generator BNC-F Figure A-18. SMPTE-310M Interface Block Diagram Figure A-19.

  • Page 160: Interface Specifications

    SDM-2020 Satellite Demodulator Data Interfaces A.7.3 Interface Specifications The following sections describe the detailed requirements for the SMPTE-310M data interface. A.7.3.1 Specification Summary Refer to Table A-34 for SMPTE-310M specifications. Table A-34. SMPTE-310M Specification Summary Video Interface (Terrestrial) Signal Type Biphase mark coded synchronous serial data per SMPTE-310M and TM 1449.

  • Page 161: Interface Loopback Mode

    -40 to + 70°C (-40 to +158°F) Humidity Up to 95% non-condensing. Physical Size SDM-2020 plug-in module compatible. Hot Pluggable Not required. Unit power is turned off prior to removal or insertion of the data interface. A.7.3.2 Interface Loopback Mode Refer to Figure A-18.

  • Page 162: Tx And Rx Terrestrial Data Interface Connector (J3, J4, J5

    SDM-2020 Satellite Demodulator Data Interfaces A.7.3.4 TX and RX Terrestrial Data Interface Connector (J3, J4, and J6) Refer to Table A-35 for data interface input and output interface connectors. Table A-35. TX/RX Terrestrial Data Interface Connector Terrestrial Data Interfaces J3, J4 SMPTE-310M RX Data Outputs, BNC female.

  • Page 163: Auxiliary Interface Connector -J5

    Data Interfaces SDM-2020 Satellite Demodulator A.7.3.5.2 Auxiliary Interface Connector –J5 This port provides input/output of the modem-specific signals. The connector is 9-pin subminiature D female, with threaded jack nuts. Refer to for connector pinouts. Table A-36. Auxiliary Interface Connector –J5...

  • Page 164: Smpte 310M/Ssi Interface Front Panel Menus

    SDM-2020 Satellite Demodulator Data Interfaces A.7.5 SMPTE-310M/SSI Interface Front Panel Menus Refer to Chapter 3, Utility Interface menu. A.7.6 SMPTE-310M/SSI Remote Interface Commands Refer to Appendix B for a listing of ASI and RS-422 interface module remote control commands. Rev.3...
  • Page 165 Data Interfaces SDM-2020 Satellite Demodulator This page is intentionally left blank. A–64 Rev.3...

  • Page 166: Asi/Lvds Data Interface

    SDM-2020 Satellite Demodulator Data Interfaces ASI/LVDS Data Interface The plug-in module provides the physical and electrical interface between external terrestrial data equipment and the modulator. The ASI/LVDS implements the two most popular DVB Data interfaces. The data is input/output on a BNC female connector as an 800 mV signal with biphase mark encoding.

  • Page 167: Figure A-20. Asi And Lvds Interface Block Diagram

    Data Interfaces SDM-2020 Satellite Demodulator BNC-F Tx ASI Recovery D0-D7 Power Tx LVDS DValid Sync Modulator / Rx LVDS Demodulator Terrestrial Interface Interface Aux I / O Tx On / Off Ext Clk M&C Recovery, Interface Processing And ASI / LVDS...

  • Page 168: Interface Specifications

    SDM-2020 Satellite Demodulator Data Interfaces A.8.3 Interface Specifications A 75Ω coaxial cable (Belden 8281 or equivalent) is recommended for all ASI connectors. Typical Coaxial cable length is up to 140 meters (460 feet) with good quality coaxial cable. Typical attenuation of up to 18dB at 270 MHz is permitted.The following cables,...
  • Page 169 Data Interfaces SDM-2020 Satellite Demodulator Table A-38. ASI/LVDS Specifications (Continued) LVDS Specifications Data Rate 1.5 to 100 Mbit/s, parallel LVDS Clock Rate Uncertainty Programmed data rate + 100 ppm Connectors 25-Pin D female per EN 80053-9. Same connector is either TX or RX data (See Loopback / Loop Thru)

  • Page 170: Jumper Selection

    SDM-2020 Satellite Demodulator Data Interfaces A.8.3.1 Jumper Selection There are jumpers located on the ASI/LVDS card that require proper selection. See Figure A-21. A description of the jumpers and application data is as follows: • • • • • • •...

  • Page 171: Applicable Jumper Data

    Data Interfaces SDM-2020 Satellite Demodulator A.8.3.2 Applicable Jumper Data When the ASI portion of the interface is used JP1 is normally positioned Off so that the pins are not connected. Also, JP2 is normally set to On. This allows installation of the interface in either the modulator or demodulator without moving any jumpers.

  • Page 172: Loopback Connection

    SDM-2020 Satellite Demodulator Data Interfaces A.8.4 Loopback Connection Refer to Table A-40 for additional requirements for Loopback. Table A-40. Looback Connections ASI Interface is active in Modulator Loops ASI input, J3 (or J4), to ASI output, J7. If JP1 is Off,...

  • Page 173: Connector Pinout Data

    Data Interfaces SDM-2020 Satellite Demodulator A.8.6 Connector Pinout Data A.8.6.1 ASI Connector Pinout The ASI interface is shown below: J3, J4 Transmit Data Input, BNC female Receive Data Output, BNC female A.8.6.2 LVDS Connector Pinout (J6) The LVDS connector (Table A-41) is a 25-Pin D female type, with threaded jack nuts.

  • Page 174: Auxiliary Connector Pinout (J5

    SDM-2020 Satellite Demodulator Data Interfaces Signal Function/Name Pin # Type Comment Data 3 B I / O Mod / Demod Data 2 B I / O Mod / Demod Data 1 B I / O Mod / Demod Data 0 B...

  • Page 175: Asi/Lvds Interface Defaults

    Data Interfaces SDM-2020 Satellite Demodulator A.8.7 ASI/LVDS Interface Defaults Default settings for the interface are listed in the following table. Interface Defaults Interface Select TX-IF Control Data or Clock Normal Frame Format Loss of Data Alarm Clock/Data Sync Correlate on data...

  • Page 176: Appendix B. Remote Control Operation

    Appendix B. REMOTE CONTROL OPERATION This appendix describes the remote control operation of the SDM-2020 demodulator. • Firmware number: FW/7734-1 • Software version: 20.1.1 General Remote controls and status information are transferred via an EIA-485 (optional EIA-232) serial communications link.

  • Page 177: Start Character

    Remote Control Operation SDM-2020 Satellite Demodulator Messages on the remote link are commands and responses. Commands are messages, which are transmitted to a satellite demodulator, while responses are messages returned by a satellite demodulator in response to a command. The general message structure is as follows: •...

  • Page 178: Command/Response

    SDM-2020 Satellite Demodulator Remote Control Operation B.2.3 Command/Response The command/response portion of the message contains a variable-length character sequence, which conveys command and response data. If a satellite demodulator receives a message addressed to it, which does not match the established protocol or cannot be implemented, a negative acknowledgment message is sent in response.

  • Page 179: End Character

    Remote Control Operation SDM-2020 Satellite Demodulator B.2.4 End Character Each message is ended with a single character, which signals the end of the message: • “cr” Carriage return character for commands • “]” End bracket for responses B–4 Rev. 3...

  • Page 180: Configuration Commands/Responses

    SDM-2020 Satellite Demodulator Remote Control Operation Configuration Commands/Responses B.3.1 Demodulator Configuration Commands Demodulator Command: <add/DF_nnnn.nnnn'cr' Where: nnnn.nnnn = Frequency Response: >add/DF_nnnn.nnnn'cr''lf'] For L-Band only: Frequency in MHz, 950.0000 to Status: <add/DF_'cr' 1750.0000 in 2.5 kHz steps. Response: >add/DF_nnnn.nnnn'cr''lf'] For 70/140 MHz only: Frequency in MHz, 70.0000 to 180.0000 in 2.5 kHz steps.
  • Page 181 Remote Control Operation SDM-2020 Satellite Demodulator Bit Error Command: <add/BERT_xxxx'cr' Where: xxxx = NONE, or 1E-n, where n = 3, 4, 5, 6, 7, Rate Response: >add/BERT_xxxx'cr''lf'] or 8 (exponent of threshold). Threshold Status: <add/BERT_'cr' Response: >add/BERT_xxxx'cr''lf'] Command: <add/EBNT_xxxx'cr' Where: xxxx = NONE, or 3.0 to 16.0 dB in 0.1 Hz Response: >add/EBNT_xxxx'cr''lf']...

  • Page 182: Interface Status Commands/Responses

    SDM-2020 Satellite Demodulator Remote Control Operation LNB Voltage Command: <add/LNBV_xx'cr' The commands LNBV_ is only applicable with the Select Response: >add/LNBV_xx'cr''lf'] installation of a 4-channel RF DEMOD. Status: <add/LNBV_'cr' X = 1, 2, 3, or 4 Response: >add/LNBV_xx'cr''lf'] Interface Status Commands/Responses...

  • Page 183: System Configuration Commands/Responses

    Remote Control Operation SDM-2020 Satellite Demodulator System Configuration Commands/Responses Time Of Command: <add/TIME_hh:mmxx'cr' Where: Response: >add/TIME_hh:mmxx'cr''lf'] hh = 1 to 12 (hours). mm = 00 to 59 (minutes). Status: <add/TIME_'cr' xx = AM or PM. Response: >add/TIME_hh:mmxx'cr''lf'] Date Command: <add/DATE_mm/dd/yyyy'cr'...

  • Page 184: Cinfiguration Status

    SDM-2020 Satellite Demodulator Remote Control Operation Configuration Status Demodulator Command: <add/DR_'cr' Where Rate Response: >add/DR_nnnnn_mmm.mmmmmm'cr''lf nnnnn = 1/2 (QPSK 1/2) [Decoder rate], 3/4 (QPSK 3/4), 7/8 (QPSK 7/8) , 5/6 (QPSK 5/6), 2/3 (QPSK 2/3), 8P23 (8PSK 2/3), 8P56 (8PSK 5/6), 8P89 (8PSK 8/9), 16QAM3/4, 16QAM7/8.
  • Page 185 Remote Control Operation SDM-2020 Satellite Demodulator Demod/ Command: <add/DCP_'cr' Coder Response: >add/DCP_'cr' Config. ISEL_xxxxxx'cr' (Notes 1, 2) Interface Select Program ICLK_xxx'cr' (Note 3) Interface Mode Status RDVB_xxxx'cr' DVB Framing Type DF_nnnn.nnnn'cr' Demodulator Frequency DR_nnnn_mmm.mmmmmm'cr' Demodulator Rate DE_xxx'cr' Descrambler Enable RCP_xxx'cr'...
  • Page 186 SDM-2020 Satellite Demodulator Remote Control Operation Interface Command: <add/ICS_'cr' Config. Response: >add/ICS_'cr' Status RCP_xxx'cr' Receive Clock Phase RDP_xxxx'cr' Receive Data Phase RDF_xxxx'cr' Receive Data Fault RDVB_xxxx'cr' DVB Framing Type ICLK_xxx'cr' (Note 3) Interface Mode INID_xxxxxxxxx'cr' Interface ID ISEL_xxxxxx'cr' (Notes 2, 4, 6)
  • Page 187 Remote Control Operation SDM-2020 Satellite Demodulator Interface Command: <add/IRXS_'cr' Status Response: >add/IRXS_'cr' FSYN_xxx'cr' Frame Sync Lock (OK/FLT) RXD_xxx'cr' Data Stable/AIS (OK/FLT) PLL_xxx'cr' Receive Synth PLL Lock (OK/FLT) FIFO_xxx'cr' Receive FIFO (OK/FLT) INT_xxx'cr' Interface Module (OK/FLT) 2047_xx'cr''lf'] 2047 Pattern Lock Detect (OK/FLT) UNFL_xxx’cr’...

  • Page 188: Error Performance Status

    SDM-2020 Satellite Demodulator Remote Control Operation Error Performance Status Raw BER Command: <add/RBER_'cr' Where: Response: >add/RBER_xm.mE-ee'cr''lf'] x = < or > (data modifier to indicate that the error rate is less than or greater than the returned value). m.m = 1.0 to 9.9 (error rate mantissa).
  • Page 189 Remote Control Operation SDM-2020 Satellite Demodulator Non-G.703 Command: <add/IRES_'cr' Where: xxxxxxxxxxx = Not Enabled (refer to Interface Interface Response: >add/IRES_xxxxxxxxxxx’cr’’If’] Configuration Command, Interface Read Error Select.), Locked (RX locked to transmitter), No Data (RX unlocked to transmitter). E b /N 0 Command: <add/EBN0_'cr'...

  • Page 190: Stored Faults

    SDM-2020 Satellite Demodulator Remote Control Operation Current Command: <add/CSV_'cr' Where: Sweep Response: >add/CSV_'cr' Value CSV_xsnnnnnn'cr' x = < or > (data modifier to indicate that the sweep CD_yyy'cr''lf'] offset value is less than or greater than the returned value). s = + or - (sweep offset from center).
  • Page 191 Remote Control Operation SDM-2020 Satellite Demodulator Demodulator Command: <add/DSF_#'cr' Stored Faults Response: >add/DSF_# hh:mm:ss MM/DD/YY'cr' MOD_xxx'cr' Demodulator Module (OK/FLT) CD_xxx'cr' Carrier Detect (OK/FLT) SYN_xxx'cr' IF Synthesizer Lock (OK/FLT) ICH_xxx'cr' I Channel (OK/FLT) QCH_xxx'cr' Q Channel (OK/FLT) BERT_xxx'cr' BER Threshold (OK/FLT) EBNT_xxx’cr’...
  • Page 192 SDM-2020 Satellite Demodulator Remote Control Operation Notes: Parameters 2 through 6 are dependent on carrier acquisition, if the decoder is not locked empty data blocks are returned (,,,). Parameters 5 and 6 display only if G.703 interface is installed Bulk Command: <add/BCS_'cr'...
  • Page 193 Remote Control Operation SDM-2020 Satellite Demodulator p16 = n, where 'n' is '0' (NRM), '1' (INV). Demodulator Spectrum Rotation (ref. 'DSR_' command). Bit Error Rate Threshold p17 = xxxx, BER threshold (ref. ‘BERT_’command) 18 to 20 Reserved p21 = ‘xxxxxxxxx’, where xxxxxxxxx = interface type Interface ID (ref.
  • Page 194 SDM-2020 Satellite Demodulator Remote Control Operation Bit 6 = 1 always. Bit 5 through Bit 0 reserved. Character 'g': Common equipment fault status character 1. Bit 6 = 1 always. Bit 5 = reserved. Bit 4 through Bit 0 = Binary representation.
  • Page 195 Remote Control Operation SDM-2020 Satellite Demodulator Modem Command: <add/MOI_'cr' Where: s = (-) Not Installed, FAST Upgradable, (+) Installed. Operations/ Response: >add/MOI_'cr' Misc. s, OEM_LCD’cr’ Information s, 8PSK’CR’’If’] Interface Command: <add/IFI_’cr’ Where: nnnnnn = Firmware number (0 to 999999) Firmware Response: >add/IFI_’cr’...

  • Page 196: Data Interfaces

    SDM-2020 Satellite Demodulator Remote Control Operation Data Interfaces B.9.1 RS422 Interface Commands Interface Command: <add/ISEL_xxx'cr' Where: xxx = DVB or 530. Select Response: >add/ISEL_xxx'cr''lf'] Command This command selects which interface connector will be used Status: <add/ISEL_'cr' for data. Response: >add/ISEL_'cr''lf']...

  • Page 197: Asi/Rs422 Interface Commands

    Remote Control Operation SDM-2020 Satellite Demodulator B.9.2 ASI/RS422 Interface Commands Interface Command: <add/ISEL_xxxxx'cr' Where: xxxxx = ASI or RS422. Select Response: >add/ISEL_xxxxx'cr''lf'] Command This command selects which interface connector will be used Status: <add/ISEL_'cr' for data. Response: >add/ISEL_'cr''lf'] DM State Command: <add/DM_xxx'cr'...

  • Page 198: G.703 Interface Commands

    SDM-2020 Satellite Demodulator Remote Control Operation B.9.4 G.703 Interface Commands External Command: <add/ERF_nnnnn.n’cr’ Where: Clock Response: >add/ERF_nnnnn.n’cr’’If] Reference nnnnn.n = 1544.0 to 20000.0 kHz (external clock frequency in Frequency Status: <add/ERF_'cr' 8.0 kHz steps) or at RX Data Rate Response: >add/ERF_nnnnn.n'cr''lf']...

  • Page 199: Smpte 310M Interface Commands

    Remote Control Operation SDM-2020 Satellite Demodulator Interface Command: <add/IBFS_’cr’ Where: nn = 1 to 99 (Relative to buffer depth.) Buffer Fill Response: >add/IBFS_nn%’cr’’If’] Status Where ‘pn’ is the last parameter returned. Parameter Parameter Name Number (Command Reference Description RX Interface Coding Format p23 = n, where n = 0 (AMI), 1 (B3ZS), 2 (HDB3), 3 (B8ZS).

  • Page 200: Asi/Lvds Interface Commands

    SDM-2020 Satellite Demodulator Remote Control Operation B.9.6 ASI/LVDS Interface Commands Interface Command: <add/ISEL_xxxx’cr’ Where: xxxx = ASI or LVDS Select Response: >add/ISEL_xxxx’cr’’lf’] Command Note: This command selects which interface connector will Status: <add/ISEL_’cr’ be used for data. Response: >add/ISEL_’cr’’lf’] Interface Command: <add/ILB_xxx’cr’...
  • Page 201 Remote Control Operation SDM-2020 Satellite Demodulator Where ‘pn’ is the last parameter returned. Parameter Parameter Name Number (Command Reference Description Interface Select (ref. “ISEL_” command) p23 = n, where n = 0 , 1, (0 = ASI, 1 = LVDS).

  • Page 202: Oem Lcd Option (Requires Fast Upgrade

    SDM-2020 Satellite Demodulator Remote Control Operation B.10 OEM LCD Option (Requires FAST Upgrade) The OEM LCD option permits the user to specify three pieces of information in the equipment. • Line 1 of the LCD display. • Line 2 of the LCD display.
  • Page 203 Remote Control Operation SDM-2020 Satellite Demodulator This page is intentionally left blank. B–28 Rev. 3...

  • Page 204: Fast Accessible Options

    Appendix C. FULLY ACCESSIBLE SYSTEM TOPOLOGY (FAST) OPTIONS This appendix describes the FAST options for the SDM-2020. FAST Accessible Options Comtech EFData’s FAST system allows immediate implementation of different options through the user interface keypad. Some FAST options are available through the basic platform unit, while others require that the unit be equipped with optional hardware or that the hardware be installed in the field.

  • Page 205: Fast System Theory

    Fast Option SDM-2020 Satellite Demodulator Notes: 1. Units that shipped on are after October 12, 1998 are DVB compliant for 8PSK. 2. Units that shipped prior to October 12, 1998 can be upgraded for 8PSK-DVB compliance. 3. Contact ADAP Customer Support department for additional information.

  • Page 206: Activation Procedure

    SDM-2020 Satellite Demodulator Fast Option C.1.3 Activation Procedure 1. Obtain Demodulator serial number as follows: a. Press [CLEAR] to return to the Main menu. b. Use [←] and [→] to select Function Select menu. c. Press [ENTER]. d. Use [←] and [→] to select Utility Demodulator Type menu.
  • Page 207 Fast Option SDM-2020 Satellite Demodulator 4. Comtech EF Data Customer Support personnel will verify the order and provide an invoice and instructions. 5. Enter access codes as follows: a. Press [CLEAR] to return to the Main menu. b. Use [←] and [→] to select Function Select Utility Demodulator menu.
  • Page 208 SDM-2020 Satellite Demodulator Fast Option e. Press [ENTER]. f. Scroll [→] to Demodulator options. g. Press [ENTER] f. Use [←] and [→] to scroll through features. Visually check selected features for a “+” sign. If a “+” sign is evident, the upgrade is completed.
  • Page 209 Fast Option SDM-2020 Satellite Demodulator This page is intentionally left blank. C–6 Rev. 3...

  • Page 210: Glossary

    Glossary The following is a list of acronyms and abbreviations that may be found in this manual. Acronym Definition Ω Ohms 16QAM 16 Quadrature Amplitude Modulation 8PSK 8 Phase Shift Keying Ampere Alternating Current Adjust Automatic Gain Control Alarm Indication Signal Amplitude Modulation ASCII American Standard Code for Information Interchange...
  • Page 211 Glossary SDM-2020 Satellite Demodulator External Reference Clock FAST Fully Accessible System Topology FIFO First in/First Out Firmware Ground Hertz (cycle per second) Input/Output Intermediate Frequency Kilohertz (10 Hertz) Liquid Crystal Display LDVS Low Voltage Differential Signal Light-Emitting Diode Line Feed...
  • Page 212 SDM-2020 Satellite Demodulator Glossary Watt Rev. 2 g–3...
  • Page 213 Glossary SDM-2020 Satellite Demodulator This page is intentionally left blank. g–4 Rev. 3...

  • Page 214: Index

    Index Activation Procedure, C–3 Data Interface Installation, A–1, A–2, A–8, A–9, A–21, A– Applicable Documents, A–5, A–13, A–21 28, A–44 Applicable Jumper Data, A-68 Data Interfaces, 1-5, 2-2, B-9 ASI ConnectorPinout, A-72 Demodulator Configuration Commands, B-5 ASI and EIA-422 Remote Interface Commands, A–5, Demodulator Faults Menu, B–5 A–13, A–21, A–27, A–41, A–57 Description, A–1, A–5, A–13, A–21, B–16, B–17...
  • Page 215 RS-422 Interface Remote Control Commands, A-12 Interface Status Commands/Responses, B–7 RS-422 Parallel/Serial Interface, A-12 Interface/M&C Software Requirements, A–2, B–7 SDM-2020 Demodulator Envelope, 1-15 Jumper Selection, A-68 Single L-Band Input (J23), 2-10 Loop Thru, A-70 Single L-Band Input Demodulator Characteristics, 1-8 Loopback Connection, A-70 SMPTE_310 Monitor, A–57...

Table of Contents