1. Manuals
  2. Brands
  3. Comtech EF Data Manuals
  4. Modem
  5. CDM-600
  6. Operating instructions manual

Comtech EF Data CDM-600 Operating Instructions Manual

Open network
Hide thumbs Also See for CDM-600:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Operator's Manual, Operation & Installation Manual
CDM-600
Open Network Satellite Modem (2.4 kbps – 20 Mbps)

Installation and Operation Manual

For Firmware Version 2.0.1 or higher
(see New in this Release – Section 1.5)
IMPORTANT NOTE: The information contained in this document supercedes all previously published
information regarding this product. Product specifications are subject to change without prior notice.
Part Number MN/CDM600.IOM
Revision 7

Advertisement

Table of Contents
loading

Related Manuals for Comtech EF Data CDM-600

Summary of Contents for Comtech EF Data CDM-600

  • Page 1: Installation And Operation Manual

    CDM-600 Open Network Satellite Modem (2.4 kbps – 20 Mbps) Installation and Operation Manual For Firmware Version 2.0.1 or higher (see New in this Release – Section 1.5) IMPORTANT NOTE: The information contained in this document supercedes all previously published information regarding this product.
  • Page 3 Comtech EF Data is an ISO 9001 Revision 7 Registered Company. February 9, 2005 Copyright © Comtech EF Data, 2001 2003, 2004, 2005. All rights reserved. Printed in the USA. Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161...
  • Page 4 CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM...

  • Page 5: Table Of Contents

    Table of Contents PREFACE........................... XI Customer Service ............................xi About this Manual ............................xii Conventions and References ........................xii Electrical Safety ............................xiii Telecommunications Terminal Equipment Directive................xiv EMC (Electromagnetic Compatibility)....................xv Warranty Policy ............................xvi CHAPTER 1. INTRODUCTION .....................1–1 Standard Features........................1–2 1.1.1 AUPC............................ 1–2 1.1.2 Software –...
  • Page 6 CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM Connect External Cables ......................2–4 CHAPTER 3. FUNCTIONAL DESCRIPTION................3–1 CHAPTER 4. PHYSICAL DESCRIPTION ................4–1 Introduction..........................4–1 Front Panel ..........................4–1 Rear Panel............................ 4–2 4.3.1 IEC Line Input Connector..................... 4–2 4.3.2 Rx and Tx IF Connectors (J1 and J2) ................... 4–3 4.3.3...
  • Page 7 CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM 5.10 Balanced G.703 Interface Connector (P7) ................5–6 5.11 AC Power Connector ........................5–7 5.12 Ground Connector ........................5–7 CHAPTER 6. FRONT PANEL OPERATION.................6–1 Description........................... 6–1 Opening Screen ........................... 6–5 Main Menu ..........................6–5 6.3.1...
  • Page 8 CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM Viterbi ............................7–1 Sequential............................. 7–2 Reed-Solomon Outer Codec....................... 7–3 Trellis Coding (FAST Option) ....................7–5 Turbo Product Codec (Hardware Option) ................7–6 TPC and Low Density Parity Check (LDPC) coding .............. 7–6 7.7.1 Introduction...........................
  • Page 9 CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM 10.2.3 Buffer Enabled, RX<>TX (TX Terrestrial or External Clock)........... 10–3 10.3 X.21 Notes ..........................10–3 10.4 Drop and Insert ......................... 10–6 10.5 Frame Formats.......................... 10–7 10.6 Time Slot Selection........................10–8 10.7 Drop and Insert Clocking......................10–9 10.8...
  • Page 10 CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM 13.5 Effect on Eb/No performance ....................13–2 CHAPTER 14. FLASH UPGRADING..................14–1 CHAPTER 15. SUMMARY OF SPECIFICATIONS .............15–1 15.1 Modulator............................ 15–1 15.2 Demodulator ..........................15–3 15.3 Data Interfaces ..........................15–6 15.4 Automatic Uplink Power Control ....................15–7 15.5...
  • Page 11 CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM Introduction..........................C–1 Activation Procedure ......................... C–1 C.2.1 Serial Number ........................C–1 C.2.2 View currently installed features ..................C–2 C.2.3 Enter Access Codes......................C–2 APPENDIX D. ODU OPERATION..................D–1 Introduction..........................D–1 D.2 MENU TREES ........................
  • Page 12 Figure 7-7. 8-PSK/TCM Rate 2/3 with and without concatenated RS Outer Code ....... 7–19 Figure 7-8. Comtech EF Data Turbo Product Codec Rate 3/4 QPSK/OQPSK, 8-PSK and 16-QAM .. 7–20 Figure 7-9. Comtech EF Data Turbo Product Codec Rate 7/8 QPSK/OQPSK, 8-PSK and 16-QAM .. 7–21 Figure 7-10.

  • Page 13: Preface

    • To ensure that the product is not damaged during shipping, pack the product in its original shipping carton/packaging. • Ship the product back to Comtech EF Data. (Shipping charges should be prepaid.) For more information regarding the warranty policies, see Warranty Policy, p. xiv.

  • Page 14: About This Manual

    About this Manual This manual provides installation and operation information for the Comtech EF Data CDM-600 satellite modem. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the CDM-600.

  • Page 15: Electrical Safety

    The user should observe the following instructions: IMPORTANT Fuses The CDM-600 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.

  • Page 16: Telecommunications Terminal Equipment Directive

    The equipment is not designed for connection to power system that has no direct connection to ground. The CDM-600 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.

  • Page 17: Emc (Electromagnetic Compatibility)

    (Also tested to FCC Part 15 Class B) Immunity: EN 50082 Part 1 - Generic immunity standard, Part 1: Domestic, commercial and light industrial environment. Additionally, the CDM-600 has been shown to comply with the following standards: EN 61000-3-2 Harmonic Currents Emission EN 61000-3-3...

  • Page 18: Warranty Policy

    Disclaimer Comtech EF Data has reviewed this manual thoroughly in order that it will be an easy-to- use guide to your equipment. All statements, technical information, and recommendations in this manual and in any guides or related documents are believed...

  • Page 19: Chapter 1. Introduction

    Chapter 1. INTRODUCTION The CDM-600 (Figure 1-1) is an Open Network Satellite Modem, intended for both Intelsat and closed network applications. • It is compliant with IESS-308/309/310/315 specifications, but also adds significant other features in closed network modes. • It offers variable data rates from 2.4 to 20 Mbps, in BPSK, QPSK, Offset QPSK, 8-PSK, 8-QAM and 16-QAM modes.

  • Page 20: Standard Features

    CDM-600 Satellite Modem Revision 7 Introduction MN/CDM600.IOM Standard Features The CDM-600 provides a wealth of standard features which go far beyond the basic requirements of the Intelsat specifications. • Low rate variable data rates – 2.4 kbps to 5.0 Mbps •...

  • Page 21: Software - Flash Upgrading

    When normal operation is again selected, all of the previous values are restored. 1.1.4 Data Interfaces The CDM-600 includes, as standard, a universal data interface that eliminates the need to exchange interface cards for different applications. The interfaces offered include: • EIA-422 (EIA530) DCE (at rates up to 10 Mbps) •...

  • Page 22: Major Assemblies

    High Stability Reference (Consult factory for availability) FAST Options and Hardware Options The CDM-600 is extremely flexible and powerful, and incorporates a large number of optional features. Some customers may not require all of these features, and therefore, in order to permit a lower initial cost, the modem may be purchased with only the desired features enabled.
  • Page 23 CDM-600 Satellite Modem Revision 7 Introduction MN/CDM600.IOM The following table shows what other options are available: Option Option Description and Comments Installation method Low Rate Variable Data rate 2.4 kbps to 5.0 Mbps BASE UNIT Mid-Rate Variable Data rate 2.4 kbps to 10.0 Mbps...

  • Page 24: Fast Accessible Options

    These techniques allow the use of 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 loaded into the unit through the front panel keyboard or the rear remote port.

  • Page 25: Hardware Options

    4) Internal/External High Stability Reference that provides a frequency stability of 2 x . This may be fitted in the factory at the time of order, or fitted in the field as an upgrade (provided the CDM-600 was manufactured after a certain date - consult the factory for further information).

  • Page 26: Supporting Hardware And Software

    Modem. The EDMAC channel may also be used to convey M&C data to a Transceiver at the distant end of a satellite link, if it is connected to a CDM-600. The CDM-600 is supported by Comtech EF Data’s SatMac software, a Windows based application that provides a ‘point and click’...

  • Page 27: New In This Release

    IF bandwidth, which replaces the previous design. CDM-600 modems fitted with this new card are identified in the opening screen as CDM-600(E), where the ‘E’ refers to Extended IF range. In addition to the new card, the modem requires Firmware Version 2.0.1 or higher.
  • Page 28 CDM-600 Satellite Modem Revision 7 Introduction MN/CDM600.IOM This page is intentionally blank. 1–10...

  • Page 29: Chapter 2. Installation

    Chapter 2. INSTALLATION Unpacking Inspect shipping containers for damage. If shipping containers are damaged, keep them until the contents of the shipment have been carefully inspected and checked for normal operation. The modem and manual are packaged in pre-formed, reusable, cardboard cartons containing foam spacing for maximum shipping protection.

  • Page 30: Mounting

    MN/CDM600.IOM Mounting If the CDM-600 is to be mounted in a rack, ensure that there is adequate clearance for ventilation, particularly at the sides. In rack systems where there is high heat dissipation, forced air cooling must be provided by top or bottom mounted fans or blowers. Under no circumstance should the highest internal rack temperature be allowed to exceed 50°C...

  • Page 31: Figure 2-1. Installation Of The Optional Mounting Bracket, Kt/6228-2

    CDM-600 Satellite Modem Revision 7 Installation MN/CDM600.IOM Equipment Rack Mounting Rail #10 Socket head screw BRACKET BOLTS Support Bracket Bracket #10 Flat Washer #10 Hex Nut Back of Modem * Note: Components of mounting kit KT/6228-1 Figure 2-1. Installation of the Optional Mounting Bracket, KT/6228-2 MN/CDM600.IOM...

  • Page 32: Configuration

    ‘FRONT PANEL OPERATION’ section). The demod should synchronize, and the green RECEIVE TRAFFIC LED should illuminate. If the unit does not pass this test, call Comtech EF Data Customer Support department for assistance. Connect External Cables Having verified correct operation in IF loop, enter the desired configuration, and proceed to connect all external cables.

  • Page 33: Chapter 3. Functional Description

    Chapter 3. FUNCTIONAL DESCRIPTION The CDM-600 has two fundamentally different types of interface - IF and data. • The data interface is a bi-directional path which connects with the customer’s equipment (assumed to be the DTE) and the modem (assumed to be the DCE).

  • Page 34: Figure 3-1. Cdm-600 Modem Block Diagram

    DTE equipment. Physically the CDM-600 modem is comprised of two main card assemblies. • The first of these is the baseband framer card, which includes all of the interface circuits, the framer/de-framer, plesiochronous/Doppler buffer, Reed Solomon outer codec, and the main microcontroller.

  • Page 35: Chapter 4. Physical Description

    Chapter 4. PHYSICAL DESCRIPTION Introduction The CDM-600 is constructed as a 1U high rack-mount chassis, which can be free- standing. Rack handles at the front ease removal from and placement into a rack. Figure 4-1 shows the front panel of the modem.

  • Page 36: Rear Panel

    CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM Rear Panel Figure 4-2. Rear Panel External cables are attached to connectors on the rear panel of the CDM-600. These comprise: Name Ref Des Connector Type Function Rx IF RF Input Tx IF...

  • Page 37: Rx And Tx If Connectors (J1 And J2)

    CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM 4.3.2 Rx and Tx IF Connectors (J1 and J2) The IF port connectors are both a 50Ω BNC female type. 75Ω cable connectors (male) will have no problem mating with this 50Ω type. The electrical impedance presented by these connectors is controlled internally by an RF-switching arrangement.

  • Page 38: Remote Control Connector (P4B)

    CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM 4.3.7 Remote Control connector (P4B) The Remote Control connector is a 9-pin ‘D’ type male (DB-9-M). Access is provide to remote control ports of the modem, both EIA-232 and EIA-485. 4.3.8 IDR Alarm connector (P5A) The Alarms connector is a 15-pin 'D' type female (DB15-F).

  • Page 39: Idi, Ddo Connectors (J10A And J11A)

    CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM 4.3.12 IDI, DDO Connectors (J10A and J11A) Two additional female BNC 75Ω connectors for unbalanced operation at the G.703 data rate of E1 (2.048 Mbps). These are the Insert Data In (IDI) and Drop Data Out (DDO) port.

  • Page 40: Dimensional Envelope

    CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM Dimensional Envelope Figure 4-3. Dimensional Envelope 4–6...

  • Page 41: Chapter 5. Connector Pinouts

    Chapter 5. CONNECTOR PINOUTS Connector Overview The rear panel connectors (Figure 5-1) provide all necessary external connections between the modem and other equipment. Figure 5-1. Rear Panel Table 5-1. External Connections Name Connector Type Function RX IF RF Input TX IF RF Output Aux Serial USB Type B (female)

  • Page 42: Bnc Connectors

    CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM BNC Connectors The BNC connectors are located on the rear panel of the modem. Refer to Table 5-2 for pin assignments. Table 5-2. BNC Connectors BNC Connector Reference Description Direction RX-IF RX-IF signals...

  • Page 43: Data Interface Connector (P3B)

    CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM Data Interface Connector (P3B) The Data Interface connector, a 25-pin D type female, conducts data input and output signals to and from the modem, and connects to customer’s terrestrial equipment, breakout panel, or protection switch. Refer to Table 5-4 for pin assignments.

  • Page 44: Audio Interface Connector (P4A)

    CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM Audio Interface Connector (P4A) The Audio interface connection is a 9-pin female D connector located on the rear panel of the modem. Refer to Table 5-5 for pin assignments. Table 5-5. Audio Interface Connector Pin Assignments...

  • Page 45: Idr Backward Alarms Connector (P5A)

    CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM IDR Backward Alarms Connector (P5A) The IDR Alarm interface connection is a 15-pin female connector located on the rear panel of the modem. Refer to Table 5-7 for pin assignments. Table 5-7. IDR Alarm Interface Connector Pin Assignments...

  • Page 46: Balanced G.703 Interface Connector (P7)

    CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM Auxiliary Serial Connector (P6) Provides an RS-232 serial link between the modem and the CRS-150 1:1 Redundancy Switch. Table 5-9. Auxiliary Serial Connector (USB Type B Socket) Pin # Description Direction Ground...

  • Page 47: Ac Power Connector

    CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM 5.11 AC Power Connector A standard, detachable, non-locking, 3-prong power cord (IEC plug) supplies the Alternating Current (AC) power to the modem. Note the following: AC Power Specifications Input Power 40W maximum, 30W typical...
  • Page 48 CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM This page is intentionally left blank. 5–8...

  • Page 49: Chapter 6. Front Panel Operation

    Description Figure 6-1. Front Panel View The user can fully control and monitor the operation of the CDM-600 from the front panel, using the keypad and display. Nested menus are used, which display all available options, and prompt the user to carry out a required action.

  • Page 50: Table 6-1. Front Panel Led Indicators

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM The behavior of the front panel LEDs is described below in Table 6-1. Table 6-1. Front Panel LED Indicators Color Condition A Unit Fault exists (Example: PSU fault) Unit Orange No Unit Faults, but a Traffic Fault exists...

  • Page 51: Figure 6-2. Keypad

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM The keypad is shown in Figure 6-2: Figure 6-2. Keypad The function of these keys is as follows: ENTER This key is used to select a displayed function or to execute a modem configuration change.

  • Page 52: Figure 6-3. Menu Trees

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM SELECT CONFIGURE CONFIGURE TEST CONFIGURE ALL CONFIGURE ALL INFORMATION CONFIGURE MODE (COMPLETE CONFIGURATION) MONITOR CONFIGURE TRANSMIT CONFIGURE MODE STORE/LOAD CONFIGURE RECEIVE UTILITY TX MODE AND INTERFACE CONFIGURE CLOCKS RX MODE AND INTERFACE...

  • Page 53: Opening Screen

    UTILITY Permits the user to perform miscellaneous functions, such as setting the Real-Time Clock, adjusting the display brightness, etc. Permits the user to monitor and control a Comtech EF Data RF Transceiver, if connected. (Outdoor Unit) FAST Permits the user to configure different options, for extended data rates, interfaces, etc.

  • Page 54: Config

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.1 CONFIG CONFIG: MODE CLOCKS D&I EDMAC MISC REMOTE MASK IMPED STATS The sub-branches available are: Permits the user to completely configure the unit, being prompted, step by step, to make choices, or edit data. This is highly recommended for new users, as it will clearly lead the user through all the configuration parameters.

  • Page 55: Config: All

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.1.1 CONFIG: ALL ALL = START (STOP, START) This menu permits the user to configure the unit, in a step-by-step process by viewing each menu in succession. Use the [←] [→] [↑] and [↓] arrow keys to select and edit the various parameters.

  • Page 56: Config: Tx

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM The second option is the Framing type. The TX options are: The RX options are: NONE NONE IBS (FAST option) IBS (FAST option) IDR (FAST option) IDR (FAST option) DROP (FAST option)
  • Page 57 Note that the range is from 52 to 88 MHz, and 104 to 176 MHz. The resolution is 100Hz. For units manufacured after February 2005, and which display CDM-600(E) on the opening menu, the range of IF frequencies has been extended to 50 - 90 MHz, and 100 - 180 MHz.
  • Page 58 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM If ALARM ACTION is selected, the following menu will be displayed: MAX TX PWR ACTION = NONE (NONE, TX-ALM) REM DEMOD UNLOCK ACT = NOM-PWR(NOM, MAX) Select the action that will occur if the AUPC causes the maximum output power level to be reached, either NONE or TX ALARM.
  • Page 59 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: TX: ENCODER: REED-SOLOMON ON REED-SOLOMON ENCODING = ON(200/180) Use the [↑] [↓] arrow keys to select one of the listed parameters, and press ENTER. Selections depend on the Framing mode. Possible selections include: •...

  • Page 60: Figure 4-1. Front Panel

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: TX: MODULATION MODULATION= QPSK (B,Q,OQ-PSK) FEC RATE = 1/2 (1/2,3/4,7/8) Select one of the parameters using the [←] [→] arrow keys, and then edit using the [↑] [↓] arrow keys. Edit the Modulation type and the FEC rate.
  • Page 61 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: TX: DATA TX DATA RATE = 01544.000 kbps DATA INVERT = OFF (ON,OFF) The top line permits the data rate to be edited. Select the digit of Transmit Data Rate to be edited using the [←] [→] arrow keys.

  • Page 62: Config: Rx

    Press ENTER. Note that the range is from 52 to 88 MHz, and 104 to 176 MHz. The resolution is 100Hz. For units manufacured after February 2005, and which display CDM-600(E)on the opening menu, the range of IF frequencies has been extended to 50 - 90 MHz, and 100 - 180 MHz.
  • Page 63 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: RX: DECODER DECODER = VIT NONE,VIT,SEQ,TCM,TPC,LDPC) REED-SOLOMON = OFF (ON,OFF) Select the parameter to edit using the [←] [→] arrow keys. The Decoder options are shown in the parentheses. Select using the [↑] [↓] arrow keys, then press ENTER.
  • Page 64 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: RX: DECODER: REED-SOLOMON ON REED-SOLOMON DECODING = ON(200/180) Use the [↑] [↓] arrow keys to select one of the listed parameters, and press ENTER. Selections depend on the Framing mode. Possible selections include: •...
  • Page 65 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: RX: DEMODULATION DEMODULATION = QPSK(B,Q,OQ,8PSK,16QAM) FEC RATE = 1/2 (1/2,3/4,7/8) Select one of the parameters using the [←] [→] arrow keys, and then edit using the [↑] [↓] arrow keys. Edit the Demodulation type and the FEC rate.
  • Page 66 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM NOTE: The minimum and maximum data rates are dependent on Demodulation type and FEC decoder Rate. If the user changes the Modulation or FEC, and the data rate becomes invalid, the Data Rate will be adjusted automatically. The upper range of data rate will be dictated by the FAST option installed.

  • Page 67: Config: Clocks

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: RX: EbNo RECEIVE EbNo ALARM POINT = 02.0 dB Select the digit of the Alarm point to be edited using the [←] [→] arrow keys. Edit the value of the digit using the [↑] [↓] arrow keys. Press ENTER.
  • Page 68 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG:CLOCKS: RX BUFFER/CLOCK CLK= RX-SAT (RX-SAT,TX-TERR,EXT-CLK,INS) BUFFER-SIZE = 00016bytes(00002ms) CENTER se the [←] [→] arrow keys to select one of the three parameters on the screen to edit. Edit the RX clock options using the [↑] [↓] arrow keys, then press ENTER...
  • Page 69 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM If CENTER is selected, the following sub-menu is displayed: CONFIG: CLOCKS: RX BUFFER/CLOCK: CENTER PRESS ENTER TO CENTER THE BUFFER OTHERWISE, PRESS CLEAR Follow the instructions on the screen. CONFIG: CLOCKS: EXT-BASEBAND-CLOCK EXTERNAL BASEBAND CLOCK = 02048.000 kHz...

  • Page 70: Config: Drop & Insert

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.1.6 CONFIG: DROP & INSERT Drop and Insert is discussed in the Chapter “Clock modes and Drop and Insert (D&I)” later in this manual. IMPORTANT DRP-TYPE= T1-D4 CHAN/TS LOOP=Y (Y/N) INS-TYPE= T1-D4 CHAN/TS sing the [←] [→] arrow keys, select one of the five parameters on the screen.

  • Page 71: Config: Edmac

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: DROP & INSERT: INSERT CHANNEL TIMESLOTS INS-CH: 1 TS: 01 Select the Time-slot to edit using the [←] [→] arrow keys and edit the value using the [↑] [↓]arrow keys, then press ENTER.
  • Page 72 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: MISC: G.703 CODE Tx G703/DDO CODE = AMI (AMI,B8ZS) Rx G703/IDI CODE = AMI (AMI,B8ZS) Parameters may only be edited if the Interface Type is G.703. Use the [←] [→] arrow keys to select the parameter to edit. Select either appropriate G.703 code using the [↑] [↓] arrow keys, then press ENTER.
  • Page 73 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: MISC: HIGH-RATE-ESC HIGH-RATE-ESC = OFF (ON,OFF) BAUDRATE = 9600 PARITY:DATA:STOP = N81 The ESC type defined here depends on the framing type selected under CONFIG, MODE. The two options are either High-Rate IBS ESC, or ESC++ For units with Firmware Version: 1.3.1 or greater: The High Rate IBS (Engineering...

  • Page 74: Config: Remote Control

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM If the Warm-up Delay is enabled, when the modem is powered up, a Warm-Up Delay Countdown will be activated, during which the TX is suppressed. The Countdown of the remaining Warm-up Delay is displayed on the front panel, for example:...

  • Page 75: Config: Mask

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: REMOTE CONTROL: CHAR FORMAT PARITY:DATA-BITS:STOP-BITS = N81 (N81,E72,O72) Edit the I/O character format using the [↑] [↓] arrow keys. The options are: No parity 8 Data bits 1 Stop bit...
  • Page 76 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM CONFIG: MASK: BUFFER SLIP BUFFER SLIP= ACTIVE (ACTIVE,MASK) Select either ACTIVE or MASKED, using the [↑] [↓] arrow keys, then press ENTER. • If the user selects ACTIVE, then a Buffer Slip fault will be generated whenever the receive circuitry senses that the buffer has either underflowed, or overflowed.

  • Page 77: Config: Impedance

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM backward alarm inputs are to be used. An activated alarm may respond to a hardware input at P5A (H/W) or be software controlled by a receive fault on the modem (S/W).

  • Page 78: Test

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.2 TEST MODEM TEST MODE = NORMAL ↓ ↓ ↓ ↓ (NORM,TX-CW,TX-1/0,IF ,DIG ,I/O Select TEST Mode or Normal Operation from the parameters shown in the parentheses using the [↑] [↓] arrow keys, then press ENTER.

  • Page 79: Figure 6-4. Loopback Modes

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM Figure 6-4. Loopback Modes 6–31...

  • Page 80: Information

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.3 INFORMATION INFO: ALL ID FORMAT TX RX CLOCKS EDMAC DROP INSERT REMOTE ALARM-MASK MISC Select information to view using the [←][→] arrow keys, then press ENTER. Note: INFO screens display information on the current configuration of the modem without risking inadvertent changes.
  • Page 81 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM INFO: TX TX:ON 070.00000MHz Z=50 PWR=-20.0 TSI=N VIT+RS:220/200 00604.000 QPSK 7/8 SCRM A sample display of TX Info is shown. The information displayed here is as follows: Top Line: TX carrier...
  • Page 82 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM INFO: CLOCKS CLOCKS:TX=INT(SCT)RX=EXT-CLK REF=INT10 BUFFER-SIZE=00016 CLK=02048U The TX Clock, RX Clock and Buffer information is displayed. Note: The Clock (CLK) information is shown only if Rx Clock is set to EXT-CLK.
  • Page 83 CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM INFO: REMOTE REMOTE-CONTROL= LOCAL ADDRESS= 0000 INTERFACE = RS-232 9600 BAUD N81 This screen shows if the unit is in Local or Remote mode, provides the details of the electrical interface type selected, the unit’s address and the baud rate selected. Pressing ENTER takes the user back to the previous menu.

  • Page 84: Monitor

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.4 MONITOR MONITOR: LIVE-ALARMS STORED-EVENTS STATISTICS RX-PARAMS AUPC-PARAMS Select the parameter to Monitor using the [←][→] arrow keys, then press ENTER. MONITOR: LIVE-ALARMS LIVE UNIT= NONE NET= NONE ALARMS RECV=DEMOD LOCK XMT= NONE An example of an Alarm screen is shown.

  • Page 85: Monitor: Stored Events

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM Unit LOSE TxFRM: Loss of Tx frame occurs in Drop & Insert operation, Network when the incoming T1 or E1 frame cannot be found by the modem. BER >10E-3: This error rate monitor is enabled for IBS and IDR framing.

  • Page 86: Monitor: Statistics

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.4.2 MONITOR: STATISTICS STATISTICS: STA114: 16.0,16.0,9.0,9.0 09/12/99 14:48:06 CLEAR ALL: NO (N/Y) The user may scroll backwards or forwards through the entries in the statistics log, using the [↑] [↓] arrow keys. Pressing ENTER or CLEAR will take the user back to the previous menu.

  • Page 87: Monitor: Rx Parameters

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.4.3 MONITOR: RX PARAMETERS ∆F=+11.7kHz RX=PARAMETERS: EbNo=11.4dB BER=0.0E-9 BUFFER=51% RX-LEVEL=-43dBm If the demodulator is locked, this screen shows the following: Eb/No This shows the value of Eb/No calculated by the demodulator. The value referred to here is the energy per information bit (Ebi), divided by the noise spectral density (No).

  • Page 88: Store/Load: Override Configuration

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.5.1 STORE/LOAD: OVERRIDE CONFIGURATION CONFIGURATION: xx OVERRIDE: NO (YES/NO) Select override using the [↑] [↓] arrow keys, then press ENTER. 6.3.6 UTILITIES UTILITIES: SET-RTC DISPLAY-BRIGHTNESS LAMP 1:1-MANUAL-SWITCH EDIT-CIRCUIT-ID Select the Utilities parameter using the [←][→] arrow keys, then press ENTER 6.3.6.1...

  • Page 89: Utilities: Lamp

    CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM 6.3.6.3 UTILITIES: LAMP FRONT PANEL LAMP TEST: XXXXXXX Select enable or disable, using the [↑][↓] arrow keys, then press ENTER. This will test all of the LEDs on the front panel then resume normal operations.

  • Page 90: Odu

    FAST is the way to enable new options in the modem. Obtain the FAST code for the new option from Comtech EF Data. Enter the code carefully. Use the [←][→] arrow keys to move the cursor to each character. Use the [↑] [↓] arrow keys to edit the character, then press ENTER.

  • Page 91: Chapter 7. Forward Error Correction Options

    Turbo Coding represents a very significant development in the area of FEC, and optionally, the CDM-600 may be fitted with one of two Turbo Product Codecs They are plug-in daughter cards (SIMM modules), both field upgradeable. The Low Rate option provides data rate capability up to 5 Mbps, and code rates limited to Rate 5/16 (BPSK, Rate 21/44 (BPSK) and Rate 3/4 (QPSK, OQPSK, 8-PSK and 16-QAM).

  • Page 92: Sequential

    Eb/No). This is not true of the Sequential decoding method, as explained in the section below. Note that in BPSK mode, the CDM-600 only permits a coding rate of 1/2. Because the method of convolutional coding used with Viterbi, the encoder does not preserve the original data intact, and is called non-systematic.

  • Page 93: Reed-Solomon Outer Codec

    Viterbi or Sequential decoder is spread out over a number of interleaving frames, so errors entering the R-S decoder do not exceed its capacity to correct those errors. In the case of the CDM-600, different R-S code rates are used, according to the mode of operation:...

  • Page 94: Table 7-3. Concatenated Rs Coding Summary

    This may be due to the carrier-recovery circuits, or the synchronization threshold of the primary FEC device, or both. In the CDM-600, and Rate 1/2 operation, this threshold is around 4 dB Eb/No. Below this value, operation is not possible, but above this value, the error performance of the concatenated R-S system produces exceptionally low error rates for a very small increase in Eb/No.

  • Page 95: Trellis Coding (Fast Option)

    – the natural consequences of the higher-order modulation. The CDM-600 fully implements the IESS-310 specification at data rates up to 20 Mbps. In accordance with the specification, the R-S outer code can be disabled. Performance curves for both cases are shown in the following Figures.

  • Page 96: Turbo Product Codec (Hardware Option)

    Turbo Codes have been developed, Turbo Convolutional Codes (TCC), and Turbo Product Codes (TPC, a block coding technique). Comtech EF Data has chosen to implement an FEC codec based on TPC. A Turbo Product Code is a 2 or 3 dimensional array of block codes.

  • Page 97: Ldpc Versus Tpc

    QAM approach that permits acquisition and tracking at much lower values of Eb/No than 8- PSK. A discussion of this approach follows. Comtech EF Data has chosen the CDM-600 platform as the first satellite modem in which to implement both LDPC and 8-QAM.

  • Page 98: Table 7-5. Available Tpc And Ldpc Modes

    1/2 to 0.95, both an LDPC and a TPC codec need to be offered. In order to meet this requirement, Comtech EF Data has developed a combination LDPC/TPC Codec module that can be added to the CDM-600 Modem, and which provides the following operating modes: Table 7-5.

  • Page 99: 7.7.3 End-To-End Processing Delay

    Forward Error Correction Options MN/CDM600.IOM This new LDPC/TPC codec module may be installed in any existing CDM-600, as a simple field upgrade, or already installed in new modems ordered from the factory. It requires Firmware Version 1.6.0 (or higher) to be installed.
  • Page 100 * The occupied bandwidth is defined at the width of the transmitted spectrum taken at the –10 dB points on the plot of power spectral density. This equates to 1.19 x symbol rate for the CDM-600 transmit filtering. ** Included for comparative purposes...

  • Page 101: Uncoded Operation (No Fec)

    There are occasions where a user may wish to operate a satellite link with no forward error correction of any kind. For this reason, the CDM-600 offers this uncoded mode for three modulation types - BPSK, QPSK, and OQPSK. However, the user should be aware of some of the implications of using this approach.
  • Page 102 Example 2: A Firmware Version of 1.3.1, or higher is used. There is no limitation on acquisition sweep width. Comtech EF Data cannot be held responsible for incorrect operation if the user does not adhere to these guidelines when using uncoded operation.

  • Page 103: Figure 7-1. Viterbi Decoding

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Uncoded BPSK/QPSK Viterbi Decoding 1E-2 Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification limit, Rate 7/8 1E-7 Coding 1E-8 Specification Specification limit Rate 1/2 limit, Rate 3/4...

  • Page 104: Figure 7-2. Sequential Decoding 64 Kbps

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Sequential Uncoded BPSK/QPSK Decoding 64 kbps 1E-2 Typical 1E-3 Performance 1E-4 1E-5 1E-6 Specification 1E-7 limit, Rate 7/8 Coding 1E-8 Specification Specification limit Rate 1/2 limit, Rate 3/4...

  • Page 105: Figure 7-3. Sequential Decoding 1024 Kbps

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Sequential Uncoded BPSK/QPSK Decoding 1024 kbps 1E-2 1E-3 Typical Performance 1E-4 1E-5 1E-6 Specification 1E-7 limit, Rate 7/8 Coding 1E-8 Specification limit Rate 1/2 Specification Coding...

  • Page 106: Figure 7-4. Sequential Decoding 2048 Kbps

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Sequential Uncoded BPSK/QPSK Decoding 2048 kbps 1E-2 1E-3 1E-4 1E-5 1E-6 Typical performance, Rate 7/8 Coding 1E-7 1E-8 Typical Typical performance, performance, Rate 3/4 Rate 1/2...

  • Page 107: Figure 7-5. Viterbi With Concatenated R-S Outer Code

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Viterbi with Uncoded BPSK/QPSK concatenated RS 220,200 1E-2 Outer Code Sync threshold, Rate 3/4 1E-3 Sync threshold, Rate 7/8 1E-4 Combined sync 1E-5 threshold, demod and Viterbi...

  • Page 108: Figure 7-6. Sequential With Concatenated R-S Outer Code

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Sequential Uncoded BPSK/QPSK with concatenated 1E-2 RS 220,200 Outer Code 512 kbps 1E-3 1E-4 Combined sync threshold, demod and Sequential 1E-5 Decoder, Rate 1/2 Sync threshold,...

  • Page 109: Figure 7-7. 8-Psk/Tcm Rate 2/3 With And Without Concatenated Rs Outer Code

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 8-PSK/TCM Rate 2/3 Uncoded BPSK/QPSK Decoding, with and without 219, 201 RS 1E-2 Outer Code Performance with CDM-600 Firmware Version 1.1.5 (or higher) 1E-3 1E-4 Typical...

  • Page 110: Figure 7-8. Comtech Ef Data Turbo Product Codec Rate 3/4 Qpsk/Oqpsk, 8-Psk And 16-Qam

    Spec limit Rate 3/4 Uncoded 8-PSK 8-PSK 1E-4 Spec limit Rate 3/4 QPSK/OQPSK 1E-5 1E-6 1E-7 Spec limit Rate 3/4 16-QAM 1E-8 Typical performance 1E-9 Figure 7-8. Comtech EF Data Turbo Product Codec Rate 3/4 QPSK/OQPSK, 8-PSK and 16-QAM 7–20...

  • Page 111: Figure 7-9. Comtech Ef Data Turbo Product Codec Rate 7/8 Qpsk/Oqpsk, 8-Psk And 16-Qam

    Spec limit Rate 7/8 Spec limit 8-PSK Rate 7/8 Uncoded QPSK/OQPSK 8-PSK 1E-4 1E-5 1E-6 1E-7 Spec limit Rate 7/8 16-QAM 1E-8 Typical performance 1E-9 Figure 7-9. Comtech EF Data Turbo Product Codec Rate 7/8 QPSK/OQPSK, 8-PSK and 16-QAM 7–21...

  • Page 112: Figure 7-10. Rate 1/2 Qpsk, Rate 0.95 Qpsk And Rate 0.95 8-Psk

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Comtech Turbo Product Codec Rate 1/2 QPSK/OQPSK Uncoded Rate 0.95 QPSK/OQPSK BPSK/QPSK 1E-2 and 8-PSK Performance with CDM-600 Firmware Version 1.1.5 (or higher) Uncoded 8-PSK 1E-3...

  • Page 113: Figure 7-11. Rate 21/44 Bpsk And Rate 5/16 Bpsk Turbo

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Comtech Turbo Product Codec Rate 21/44 BPSK Rate 5/16 BPSK 1E-2 Spec limit Rate 5/16 BPSK 1E-3 Spec limit Rate 21/44 BPSK 1E-4 Uncoded BPSK/QPSK 1E-5...

  • Page 114: Figure 7-12. 16-Qam Viterbi, Rate 3/4 And Rate 7/8 With 220,200 Rs Outer Code

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 16-QAM Viterbi, Rate 3/4 and Rate 7/8 with 220,200 RS Outer Code Uncoded BPSK/QPSK 1E-2 Uncoded 16-QAM 1E-3 1E-4 Specification limit Rate 7/8 Viterbi and 220,200 RS...

  • Page 115: Figure 7-13. Differential Encoding - No Fec, No Scrambling

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 Differential Encoding - No FEC, no Uncoded BPSK/QPSK 1E-2 scrambling 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 Figure 7-13. Differential Encoding - No FEC, No Scrambling...

  • Page 116: Figure 7-14. Ldpc, Rate 1/2, Bpsk, (O)Qpsk

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 LDPC, BPSK, QPSK, Uncoded BPSK/QPSK/ (O)QPSK, Rate 1/2 OQPSK 1E-2 1E-3 1E-4 Spec limit Rate 1/2 1E-5 BPSK/QPSK/OQPSK 1E-6 1E-7 Typical limit Rate 1/2 BPSK/QPSK/OQPSK 1E-8 1E-9 Figure 7-14.

  • Page 117: Figure 7-15. Ldpc, Rate 2/3, (O)Qpsk/8-Psk/8-Qam

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 LDPC Rate 2/3 QPSK/OQPSK/8-PSK/ 8-QAM Uncoded 1E-2 BPSK/QPSK/OQPSK 1E-3 Spec Limit Spec Limit QPSK/OQPSK 8-QAM Rate 2/3 Rate 2/3 Uncoded 1E-4 8-PSK Typical Limit 1E-5 8-QAM...

  • Page 118: Figure 7-16. Ldpc, Rate 3/4, (O)Qpsk/8-Qam

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 LDPC, Rate 3/4 QPSK/OQPSK/ Uncoded BPSK/QPSK 8-QAM 1E-2 1E-3 Spec limit Spec limit QPSK/OQPSK 8-QAM Uncoded Rate 3/4 Rate 3/4 8-PSK 1E-4 Typical limit 8-QAM Rate 3/4...

  • Page 119: Figure 7-17. Ldpc, Rate 3/4, 8-Psk / 8-Qam

    CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM Eb/No in dB 1E-1 LDPC Rate 3/4 8-PSK/16-QAM 1E-2 Uncoded 16-QAM Uncoded 8-PSK 1E-3 Spec limit 8-PSK Rate 3/4 1E-4 Spec limit 16-QAM Rate 3/4 1E-5 Tyical limit 8-PSK Rate 3/4...
  • Page 120 CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM This page is intentionally blank 7–30...

  • Page 121: Chapter 8. Offset Qpsk Operation

    Chapter 8. OFFSET QPSK OPERATION Offset QPSK modulation is a variation of normal QPSK, which is offered in the CDM- 600. Normal, bandlimited, QPSK produces an RF signal envelope that necessarily goes through a point of zero amplitude when the modulator transitions through non-adjacent phase states.
  • Page 122 CDM-600 Satellite Modem Revision 7 Offset QPSK Operation MN/CDM600.IOM The two consequences of this are: 1. Acquisition may be longer, especially at low data rates. 2. The acquisition threshold is higher than for normal QPSK, although the demodulator will maintain lock down to its normal levels. For Firmware Versions prior to 1.3.1, the acquisition thresholds are as follows:...

  • Page 123: Introduction

    Chapter 9. OPEN NETWORK OPERATIONS Introduction This section summarizes the functionality and specifications of the various Open Network operating modes (IDR, IBS and Drop and Insert). Primary Data Rates Supported G.703 1544, 2048, 6312 and 8448 kbps SD, RD EIA-422, V.35, LVDS N x 64 kbps SD, RD (up to 8448 kbps) ADPCM Audio 64 kbps only, full duplex...

  • Page 124: Ibs Clock/Data Recovery And De-Jitter

    CDM-600 Satellite Modem Revision 7 Open Network Operations MN/CDM600.IOM 9.2.1 IBS Clock/data recovery and De-jitter Performs clock and data recovery on the G.703 format. Clock de-jitter and data encoding/decoding is done as with the IDR configuration. 9.2.2 IBS Framing Multiplexes/demultiplexes the primary data in compliance with the standard IESS-309 overhead ratio of 1/15 (4 overhead bytes per 60 data bytes) and provides the rate exchanged transmit clock to the modulator portion of the base modem.

  • Page 125: D&I Primary Data Interfaces

    CDM-600 Satellite Modem Revision 7 Open Network Operations MN/CDM600.IOM Buffer Clock Reference Derived from Insert Data In (Insert Clock) External, RX (satellite) or TX (Terrestrial) Asynchronous Engineering Service Channel ESC Data Interface Type EIA-232, Asynchronous ESC Data Rate 1/2000 of primary data rate...

  • Page 126: Idr

    CDM-600 Satellite Modem Revision 7 Open Network Operations MN/CDM600.IOM Primary Data Rates Supported G.703 1544 kbps SD, RD EIA-422 (Replaces 8K Overhead) 2048 kbps SD, RD V.35 (Replaces 8K Overhead) 6312 kbps SD, RD 8448 kbps SD, RD Engineering Service Channel...

  • Page 127: Idr Primary Data Interfaces

    CDM-600 Satellite Modem Revision 7 Open Network Operations MN/CDM600.IOM 9.4.1 IDR Primary Data Interfaces When configured for IDR operation, the board performs these functions: • Receives and performs clock and data recovery on incoming G.703 T1 and E1 pseudo-ternary data.
  • Page 128 CDM-600 Satellite Modem Revision 7 Open Network Operations MN/CDM600.IOM This page is intentionally blank 9–6...

  • Page 129: Transmit Clocking

    TT) - the modem can accept it if it is present, but uses ST if it is not. At rates above 2 Mbps, Comtech EF Data highly recommends that the user returns TT to ensure the correct clock/data relationship.

  • Page 130: Tx Terrestrial

    10.1.4 Rx Loop-Timed, RX<>TX (Asymmetric Loop Timing) The CDM-600 incorporates circuitry which permits loop timing when the TX and RX data rates are not the same. In this case the clock frequency appearing at ST will be whatever the TX data rate is programmed to, but phase-locked to the demodulator’s receive symbol clock.

  • Page 131: Receive Clocking

    Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM 10.2 Receive Clocking There are three receive clocking modes in the CDM-600, plus an additional setting used for Drop and Insert only – see later section. 10.2.1 Buffer Disabled (RX Satellite) When the buffer is disabled, the receive clock (Receive Timing, or RT) is derived directly from the demodulator, and hence will be subject to plesiochronous and Doppler offsets.

  • Page 132: Figure 10-1 Tx Clock Modes

    CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM Figure 10-1. Tx Clock Modes 10–4...

  • Page 133: Figure 10-2 Rx Clock Modes

    CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM Figure 10-2. Rx Clock Modes 10–5...

  • Page 134: Drop And Insert

    CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM 10.4 Drop and Insert The Drop and Insert (D&I) multiplexer works in conjunction with the G.703 interfaces to enable the modem to transmit or receive fractional parts of a T1 or E1 data stream.

  • Page 135: Frame Formats

    CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM 10.5 Frame Formats The E1 and T1 frame formats that are supported are shown in Figure 10-3: E1-CCS (Common Channel Signalling) 2048 kbps E1 Frame Maximum channels to drop = 30 = 1920 kbps...

  • Page 136: Time Slot Selection

    CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM 10.6 Time Slot Selection Selection of the transmit and receive data rates may be made in certain 64 kbps increments and may be independent of each other. The actual satellite rates for open network D&I are 16/15 of the transmit or receive data rate to include IBS overhead per...

  • Page 137: Drop And Insert Clocking

    10.7 Drop and Insert Clocking The general arrangement for Drop and Insert clocking in the CDM-600 is shown below: Figure 10-4 Drop and Insert Clocking Note that are two inputs and two outputs shown for Drop and Insert Operation. These are: •...

  • Page 138: Rx Buffer Clock = Insert (D&I Only)

    CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM 10.8 Rx Buffer Clock = Insert (D&I only) The E1 or T1 clock recovery from the IDI G.703 port serves as the Rx Buffer reference. In addition, the recovered data is the E1/T1 input to the Insert Mux. If the Rx G.703 recovery circuit detects no activity at IDI input, or cannot detect the expected frame format, Buffer Clock = Rx Satellite will be chosen as a fall-back.

  • Page 139: Figure 10-6. Single-Source Multiple Modems (Daisy Chain)

    CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM MODEM MODEM MODEM Multiple Modem Drop & Insert Application: This application shows how the loop is extended to one or more additional modems. Terrestrial Trunk DDO- IDI connection may be made internally using Loop = Y under D&I menu.
  • Page 140 CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM This page is intentionally left blank. 10–12...

  • Page 141: Chapter 11. Edmac Channel

    Chapter 11. EDMAC CHANNEL 11.1 Theory Of Operation As explained earlier, EDMAC is an acronym for Embedded Distant-end Monitor And Control. This is a feature that permits the user to access the M&C features of modems which are at the distant-end of a satellite link. This is accomplished by adding extra information to the user’s data, but in a manner which is completely transparent to the user.

  • Page 142: M&C Connection

    CDM-600 Satellite Modem Revision 7 EDMAC Channel MN/CDM600.IOM known state. In the receiver, having synchronized to the frame, the de-scrambler can begin its processing at exactly the right time. This method does not multiply errors, and therefore has a clear advantage over V.35 scrambling. This is fortunate, as there is a penalty to be paid for adding the framing.

  • Page 143: Setup Summary

    CDM-600 Satellite Modem Revision 7 EDMAC Channel MN/CDM600.IOM Apart from the round-trip satellite delay, the M&C Computer does not see any difference between local and distant-end units - it sends out a packet, addressed to a particular unit, and gets back a response. It can be seen that the EDMAC Master simply acts as forwarding service, in a manner which is completely transparent.

  • Page 144: Drop & Insert

    CDM-600 Satellite Modem Revision 7 EDMAC Channel MN/CDM600.IOM 11.4 Drop & Insert ++ A new variation of EDMAC is available with D&I++ framing. With this, each frame contains 2944 bits, with 64 overhead bits and 2880 user data bits. The portion of the overhead used for the EDMAC link performs identically to that of the EDMAC frame, but because D&I++ uses a smaller overhead, the two modes are not compatible with each...

  • Page 145: Chapter 12. Automatic Uplink Power Control

    Chapter 12. AUTOMATIC UPLINK POWER CONTROL 12.1 Introduction Automatic Uplink Power Control (AUPC) is a feature whereby a local modem is permitted to adjust its own output power level in order to attempt to maintain the Eb/No at the remote modem. The user MUST obtain permission from the Satellite Operator to use this feature.

  • Page 146: Setting Aupc Parameters

    CDM-600 Satellite Modem Revision 7 Automatic Uplink Power Control (AUPC) MN/CDM600.IOM 12.2 Setting AUPC Parameters 1) The user, under the menu (CONFIG, MODE) first ensures that EDMAC is selected. EDMAC may be selected as IDLE, or the unit may be defined as an EDMAC Master or Slave.

  • Page 147: Alarm

    CDM-600 Satellite Modem Revision 7 Automatic Uplink Power Control (AUPC) MN/CDM600.IOM 12.2.3 Alarm This parameter defines how the user wants the modem to act if, under AUPC control, the maximum power limit is reached. The two choices are: • NONE (no action) •...

  • Page 148: Monitoring

    AUPC is disabled, this will indicate 0.0 dB. This value is also available via the remote control interface. Comtech EF Data strongly cautions against the use of large values of permitted power level increase under AUPC control. Users should...

  • Page 149: Chapter 13. Esc

    20 Mbps may be used with ESC++. In all cases, if the Reed-Solomon outer codec is used, the 126/112 ratio is employed with ESC++. The new frame structure may be used with any FEC codec type available with the CDM-600. 13–1...

  • Page 150: Available Baud Rates

    CDM-600 Satellite Modem Revision 7 ESC++ MN/CDM600.IOM 13.3 Available Baud Rates At the lowest data rates, the 11.76% overhead may not allow all baud rates. The following table shows available rates: Data rate Baud rates available 64 to 127.999 kbps 1200, 2400, 4800 128 to 191.999 kbps...

  • Page 151: Chapter 14. Flash Upgrading

    3-wires between 9 pin ‘D’ type female connectors. This is shown in Appendix A. Comtech EF Data will distribute a free software utility, that is designed to run under Windows 95/98 or Windows NT. This utility program is called 600Flash.exe, and should be copied to the user’s computer hard disk.
  • Page 152 MN/CDM600.IOM Full on-line help is provided with 600Flash.exe, but if users experience a problem, or have a question, they should contact Comtech EF Data Customer Support department. The Remote Control port EIA-232 lines used for Flash upgrading also are connected to the Primary 25-pin data connector (P3B), and are used when 1:N Redundancy Switch is connected.

  • Page 153: Chapter 15. Summary Of Specifications

    Chapter 15. SUMMARY OF SPECIFICATIONS 15.1 Modulator Modulation BPSK, QPSK, OQPSK, 8-PSK, 8-QAM and 16-QAM Symbol rate range 4.8 ksps to 10.0 Msps Data rate range See Section 14.9 Operating modes Open Network, per Intelsat IESS-308/309/310/314 (IDR, IBS/SMS) E1/T1 Drop and Insert Transparent, Closed Network, IESS-315 (VSAT Turbo) Proprietary EDMAC framed mode: * 5% overhead - all modes except BPSK Turbo, Rate 1/2 OQPSK Turbo, and data rates <...
  • Page 154 Rate 3/4 QPSK/OQPSK/8-PSK/8-QAM/16-QAM Output frequency CDM-600: 52 - 88 MHz, 104 - 176 MHz, 100 Hz resolution – units manufactured prior to February 2005 CDM-600(E): 50 - 90 MHz, 100 - 180 MHz, 100 Hz resolution – units manufactured after February 2005 Stability ±1.5 ppm, 0 to 50...

  • Page 155: Demodulator

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 1.40 1.50 Symbol Rate, R Comtech EF Data CDM-600 Transmit Power Spectral Density, referred to symbol rate Intelsat...
  • Page 156 CDM-600 Satellite Modem Revision 7 Summary of Specifications MN/CDM600.IOM VITERBI Rate 1/2 (B, Q, OQ) Rate 3/4 (Q, OQ) Rate 7/8 (Q, OQ) BER performance Guaranteed Eb/No: Guaranteed Eb/No: Guaranteed Eb/No: (met in the presence of (typical value in (typical value in...
  • Page 157 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM TURBO PRODUCT Rate 1/2 (Q, OQ) Rate 21/44 (B) Rate 5/16 (B) CODEC BER Guaranteed Eb/No: Guaranteed Eb/No: Guaranteed Eb/No: Rate 1/2 QPSK (typical value in (typical value in (typical value in...

  • Page 158: Data Interfaces

    CDM-600 Satellite Modem Revision 7 Summary of Specifications MN/CDM600.IOM LDPC CODEC BER 8-PSK Rate 2/3 LDPC 8-PSK Rate 3/4 LDPC Rate 2/3 8-PSK Guaranteed Eb/No: Guaranteed Eb/No: Rate 3/4 8-PSK (typical value in (typical value in (With two adjacent For:...

  • Page 159: Automatic Uplink Power Control

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Modem Alarms Relay outputs (Tx, Rx & unit faults) 15-pin D-sub (male) Demodulator I & Q test outputs (constellation) Demodulator Rx Signal Level output (0 to 2.5 volts) External carrier off input...

  • Page 160: Data Rate Ranges

    CDM-600 Satellite Modem Revision 7 Summary of Specifications MN/CDM600.IOM 15.6 Data Rate Ranges Code Rate/Modulation FEC Type Data Rate Range Uncoded BPSK None 4.8 kbps to 10.0 Mbps Uncoded QPSK/OQPSK None 9.6 kbps to 20 Mbps Rate 1/2 BPSK Viterbi 2.4 kbps to 5.0 Mbps...

  • Page 161: Miscellaneous

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM 15.7 Miscellaneous Front panel Tactile keypad, 6 keys (Up/Down, Left/Right, Enter/Clear) Vacuum Fluorescent Display (blue) - 2 lines of 40 characters Loopbacks Internal IF loopback, RF loopback, digital loopback, and inward/outward loopback...
  • Page 162 CDM-600 Satellite Modem Revision 7 Summary of Specifications MN/CDM600.IOM This page is intentionally left blank. 15–10...

  • Page 163: Chapter 16. Remote Control

    Introduction This section describes the protocol and message command set for remote monitor and control of the CDM-600 Modem. The electrical interface is either an EIA-485 multi-drop bus (for the control of many devices) or an EIA-232 connection (for the control of a single device), and data is transmitted in asynchronous serial form, using ASCII characters.

  • Page 164: Basic Protocol

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Each target has a unique address, and each time the controller transmits, in a framed ‘packet’ of data, the address of the intended recipient target is included. All of the targets receive the packet, but only one (the intended) will reply. The target enables its output line driver, and transmits its return data packet back to the controller, in the other direction, on the physically separate pair.

  • Page 165: Packet Structure

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM 16.5 Packet Structure Controller-to-target: Start of Packet Target Address Address Instruction Code Optional End of Packet Qualifier De-limiter Code Arguments < = or ? Carriage Return ASCII code 60 ASCII code 47...

  • Page 166: Instruction Code

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM 16.5.3 Instruction Code This is a three-character alphabetic sequence that identifies the subject of the message. Wherever possible, the instruction codes have been chosen to have some significance. For example TFQ for transmit frequency, RMD for receive modulation type, etc. This aids in the readability of the message, should it be displayed in its raw ASCII form.

  • Page 167: Message Arguments

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Second, if the controller sends an instruction to set a parameter to a particular value, then, providing the value sent in the argument is valid, the target will acknowledge the message by replying with TFQ= (with no message arguments).

  • Page 168: Alphabetical List Of Remote Commands

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM 16.6 Alphabetical list of Remote Commands ITD?, 16–14 RNS?, 16–30 ITS?, 16–39 RRS?, 16–20 ITY?, 16–22 RSI?, 16–20 ADJ?, 16–25 RSL?, 16–33 APP?, 16–13 RSW?, 16–21 AUP?, 16–13 RTC, 16–22 RTE?, 16–22 LRS?, 16–34...
  • Page 169 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) TFQ= 8 bytes Command or Query.
  • Page 170 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Exception: Select DROP or D&I++ mode using TFM (Transmit Framing type) which is highest priority Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and...
  • Page 171 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) Tx FEC Code TCR= 1 byte, value...
  • Page 172 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) TRS= 1 byte, value Command or Query.
  • Page 173 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) Tx Carrier TXO= 1 byte, value Command or Query.
  • Page 174 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) Remote 4 bytes Query only.
  • Page 175 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) Transmit TTA= 1 byte, 0 or 1 Command or Query.
  • Page 176 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) Tx IF TIP= 1 byte, value Command or Query.
  • Page 177 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) Rx Framing RFM= 1 byte, value Command or Query.
  • Page 178 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) Rx Demod RMD= 1 byte, value Command or Query.
  • Page 179 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Type Code and or Response Code and Command to Query Qualifier) Qualifier) Rx Data RDR= 9 bytes Command or Query.
  • Page 180 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments Response Parameter (Instruction for Command (Instruction Description of Arguments Response to Query Code and or Response Type Code and Command to Query Qualifier) Qualifier) External REF= 10 bytes Command or Query.
  • Page 181 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Invert Rx IRD= 1 byte, 0 or 1 Command or Query.
  • Page 182 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Rx Audio RVL= 4 bytes Command or Query.
  • Page 183 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Receive ESC RET= 1 byte, 0 or 1 Command or Query.

  • Page 184: Index

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Engineering ESC= 1 byte, 0 or 1 Command or query.
  • Page 185 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) External EFR= 1 byte, value Command or query.
  • Page 186 Unit Test TST= 1 byte, value Command or Query. TST= TST? TST=x Mode of 0 thru 6 CDM-600 Test Mode, where: TST? (see description of arguments) 0=Normal Mode (no test) TST* 1=Tx CW TST# 2=Tx Alternating 1,0 Pattern 3=IF Loopback...
  • Page 187 1 byte, 0 or 1 Command or Query. ODU= ODU? ODU=x Comms Enables or disables communications, via the FSK link, ODU? (see description of enable with a Comtech EF Data transceiver (ODU), where: arguments) ODU* 0=Disabled ODU# 1=Enabled Example: ODU=0 (selects Disabled) 16–25...

  • Page 188: Stored Configurations

    CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Global MGC= 118 bytes, Command or Query.Global Configuration of FFF.FFFFDDDDD.DDDGYRMVSPP.PBaaa.aa...
  • Page 189 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Configuration CST= 1 byte, value Command only.
  • Page 190 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Statistics SSI= 1 byte, Command or Query.
  • Page 191 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Clear All CAS= None Command only.
  • Page 192 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Retrieve next 80 bytes Query only.
  • Page 193 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Initialize IEP= None Command only.
  • Page 194 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Rx BER 5 bytes Query only.
  • Page 195 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) 33399999999 29 bytes Query only.
  • Page 196 3=TPC/LDPC Codec to 5 Mbps 4=TPC/LDPC Codec and FAST option to 10 Mbps 5=TPC/LDPC Codec and FAST option to 20 Mbps bbb=defines the modem model number: 600 is the CDM-600 (this case) 601 is the CDM-600L 602 is the CLM-9600L c=Data Rate Option: 0=Base (to 5 Mbps), 1=to 10 Mbps, 2=to 20 Mbps.
  • Page 197 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Faults and 6 bytes Query only.
  • Page 198 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Drop & Insert DNI= 51 bytes Command or query.
  • Page 199 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Insert ITS= 3 bytes Command or query.
  • Page 200 CDM-600 Satellite Modem Revision 7 Remote Control MN/CDM600.IOM Command Query Arguments for Response Parameter (Instruction Command or (Instruction Description of Arguments Response to Query Code and Response to Type Code and Command Query Qualifier) Qualifier) Offline Unit 6 bytes Query only. (1:1 set-up)

  • Page 201: Appendix A. Cable Drawings

    Appendix A. CABLE DRAWINGS The EIA-530 standard pinout (provided on the CDM-600) is becoming more popular in many applications. However, there are still many occasions when, especially for existing EIA-422/449 and V.35 users, a conversion must be made. For these situations, the following two cable drawings show EIA-530 to EIA-422/449 DCE conversion, and EIA-530 to V.35 DCE conversion.
  • Page 202 CDM-600 Satellite Modem Revision 7 Cable Drawings MN/CDM600.IOM A–2...
  • Page 203 CDM-600 Satellite Modem Revision 7 Cable Drawings MN/CDM600.IOM A–3...
  • Page 204 CDM-600 Satellite Modem Revision 7 Cable Drawings MN/CDM600.IOM A–4...

  • Page 205: Appendix B. Eb/No Measurement

    Appendix B. Eb/No MEASUREMENT Although the CDM-600 calculates and displays the value of receive Eb/No on the front panel of the unit, it is sometimes useful to measure the value using a spectrum analyzer, if one is available. B–1...
  • Page 206 CDM-600 Satellite Modem Revision 7 Eb/No Measurement MN/CDM600.IOM The idea is to accurately measure the value of (Co+No)/No, (Carrier density + Noise density/Noise density). This is accomplished by tuning the center frequency of the Spectrum analyzer to the signal of interest, and measuring the difference between the peak spectral density of the signal (the flat part of the spectrum shown) and the noise density.
  • Page 207 CDM-600 Satellite Modem Revision 7 Eb/No Measurement MN/CDM600.IOM B–3...
  • Page 208 CDM-600 Satellite Modem Revision 7 Eb/No Measurement MN/CDM600.IOM This page is intentionally blank B–4...

  • Page 209: Appendix C. Fast Activation Procedure

    These techniques allow the use of 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 loaded into the unit through the front panel keyboard.

  • Page 210: View Currently Installed Features

    Scroll through the Modem Options and note which are ‘Installed’ or ‘Not Installed’. Any that are ‘Not Installed’ may be purchased as a FAST upgrade. Contact a Comtech EF Data sales representative to order features. You will be asked to provide the Modem Serial Number. Comtech EF Data Customer Support personnel will verify the order and provide an invoice and instructions, including a 20-character configuration code.

  • Page 211: Appendix D. Odu Operation

    Appendix D. ODU OPERATION Introduction The user can fully control and monitor the operation of a Comtech EF Data ODU from the front panel, using the keypad and display of a CDM-600 modem. Nested menus display all available options and prompt the user for required actions. The ODUs that can...

  • Page 212: Menu Trees

    CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM MENU TREES D.2.1 MODEM MAIN MENU SELECT: CONFIGURATION TEST INFORMATION MONITOR STORE/LOAD UTILITY FAST The user is presented with the following choices: CONFIGURATION permits the user to fully configure the modem. TEST permits the user invoke one of several modem Test Modes.
  • Page 213 STANDALONE should be selected when the Modem is linked via the Rx IF cable to a single Comtech EF Data ODU. Selecting STANDALONE for a CSAT will take the user to the menu shown in paragraph D.2.5. If the modem detects a KST, the user will be taken to the menu shown in paragraph D.2.27.
  • Page 214 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.4 (ODU,ENABLE,1:1) REDUNDANCY BOX RED: ONLINE:ODU2 MODE:AUTO SWITCH:N TXSW:OK RXSW:OK 5V:5.0 12V:12.0 There are two modes that can be edited: • AUTO • MANUAL This is the indication of the current operating mode of the 1:1 ODU system. In Auto mode, when the Online ODU faults, the switchover is done automatically to replace the faulty unit.
  • Page 215 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.6 (ODU,ENABLE,1:1,CSAT#1) CONFIGURATION (ODU,ENABLE,1:1,CSAT#2) CONFIGURATION (ODU,ENABLE,STANDALONE CSAT) CONFIGURATION CONFIG: TX-PARAMETERS RX-PARAMETERS LNA-PARAMETERS MISCELLANEOUS Use the [←] or [→] keys to select the parameters to configure, then press ENTER. D.2.7 (ODU,ENABLE,1:1,CSAT#1,CONFIG) (ODU,ENABLE,1:1,CSAT#2,CONFIG) (ODU,ENABLE,STANDALONE CSAT,CONFIG) TX: FREQ=6427.0 MHz...
  • Page 216 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.9 (ODU,ENABLE,1:1,CSAT#1,CONFIG) RECEIVER (ODU,ENABLE,1:1,CSAT#2,CONFIG) RECEIVER (ODU,ENABLE,STANDALONE CSAT,CONFIG) RECEIVER RX: FREQ=3600.0 MHz ATT=18.00 dB MUTE=UNMUTED SLOPE Use the [←] or [→] arrow keys to select the parameter to edit. Use the [↑] or [↓] keys to edit the parameter, then press ENTER to implement, or CLEAR.
  • Page 217 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.11 (ODU,ENABLE,1:1,CSAT#1,CONFIG) (ODU,ENABLE,1:1,CSAT#2,CONFIG) (ODU,ENABLE,STANDALONE CSAT,CONFIG) LNA: STATE=OFF CALIBRATE-LNA-CURRENT=NO CURRENT-WINDOW=48% FAULT-LOGIC=SUMMARY Use the [←] or [→] keys to select the parameter to edit. Use the [↑] or [↓] keys to edit the parameter, then press ENTER to implement, or CLEAR.
  • Page 218 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.12 (ODU,ENABLE,1:1,CSAT#1,CONFIG) MISCELLANEOUS (ODU,ENABLE,1:1,CSAT#2,CONFIG) MISCELLANEOUS (ODU,ENABLE,STANDALONE CSAT,CONFIG)MISCELLANEOUS MISC: COLD-START=DISABLE AFR=ENABLE XREF=NO REF-ADJUST=087 RTC=OFF Use the [←] or [→] keys to select the parameter to edit. Use the [↑] or [↓] keys to edit the parameter, then press ENTER to implement, or CLEAR.
  • Page 219 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.13 (ODU,ENABLE,1:1,CSAT#1) MONITOR (ODU,ENABLE,1:1,CSAT#2) MONITOR (ODU,ENABLE,STANDALONE CSAT) MONITOR MONITOR: TRANSMIT RECEIVE MISCELLANEOUS POWER-SUPPLIES Use the [←] or [→] keys to select the parameters to monitor, then press ENTER. D.2.14 (ODU,ENABLE,1:1,CSAT#1, MONITOR) (ODU,ENABLE,1:1,CSAT#2, MONITOR) (ODU,ENABLE,STANDALONE CSAT, MONITOR) TX TX: SYNTUNE = 09.6 VDC...
  • Page 220 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.17 (ODU,ENABLE,1:1,CSAT#1, MONITOR) PWR-SUPPLIES (ODU,ENABLE,1:1,CSAT#2, MONITOR) PWR-SUPPLIES (ODU,ENABLE,STANDALONE CSAT, MONITOR) PWR-SUPPLIES 24V=24.1 VDC 12V=12.5VDC +5V=+5.4VDC 20V=21.2 VDC 10V=10.2VDC -5V=-5.3VDC Press ENTER or CLEAR to return to previous menu. D.2.18 (ODU,ENABLE,1:1,CSAT#1) ALARMS (ODU,ENABLE,1:1,CSAT#2)
  • Page 221 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.20 (ODU,ENABLE,1:1,CSAT#1, ALARMS) STORED-ALARMS (ODU,ENABLE,1:1,CSAT#2, ALARMS) STORED-ALARMS (ODU,ENABLE,STANDALONE CSAT, ALARMS) STORED-ALARMS As the stored events are being read, the screen will show: READING STORED FAULTS..PLEASE WAIT Then, the Stored Alarms screen will be shown. An example is shown below:...
  • Page 222 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.22 (ODU,ENABLE,1:1,CSAT#1,INFO) MODEL (ODU,ENABLE,1:1,CSAT#2,INFO) MODEL (ODU,ENABLE,STANDALONE CSAT,INFO) MODEL MODEL: CSAT-5060/025 V2.19 S/N: 010300346 Press ENTER or CLEAR to return to previous menu. D.2.23 (ODU,ENABLE,1:1,CSAT#1,INFO) (ODU,ENABLE,1:1,CSAT#2,INFO) (ODU,ENABLE,STANDALONE CSAT,INFO) INFO: TX:OFF 6427.0MHz 23.00dB AMP:OFF UNMUTED SLOPE:0.3...
  • Page 223 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.25 (ODU,ENABLE,1:1,CSAT#1,INFO) MISC (ODU,ENABLE,1:1,CSAT#2,INFO) MISC (ODU,ENABLE,STANDALONE CSAT,INFO) MISC INFO: COLD START:OFF AUTO FAULT RECOVERY:SUMMARY Press ENTER or CLEAR to return to previous menu. D.2.26 (ODU,ENABLE,1:1,CSAT#1,INFO) (ODU,ENABLE,1:1,CSAT#2,INFO) (ODU,ENABLE,STANDALONE CSAT,INFO) INFO: LNA:OFF FAULT-LOGIC:SUMMARY WINDOW:48% Press ENTER or CLEAR to return to previous menu.
  • Page 224 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.29 (ODU,ENABLE,STANDALONE KST,CONFIG) TX:OFF FREQ=13955 MHz ATT=23 dB AGC=OFF Use the [←] or [→] keys to select the parameter to edit. Use the [↑] or [↓] keys to edit the parameter, then press ENTER to implement, or CLEAR.
  • Page 225 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.32 (ODU,ENABLE,STANDALONE KST) INFORMATION KST INFO: MODEL TX+RX-PARAM MISC NUMBERS Use the [←] or [→] arrow keys to select the type of information to view, then press ENTER. D.2.33 (ODU,ENABLE,STANDALONE KST,INFO) MODEL...
  • Page 226 CDM-600 Satellite Modem Revision 7 ODU Operation MN/CDM600.IOM D.2.36 (ODU,ENABLE,STANDALONE KST,INFO) NUMBERS M&C: F/W:9364-1B VER:01.01.03 assy:9357-1A S/N:021476493 Press the [↑] or [↓] keys to view further Number information, for the Up Converter, Down Converter and HPA assemblies. Press ENTER or CLEAR to return to previous menu.

  • Page 227: Index

    Index CLOCKS, 6–19 DROP TIMESLOTS, 6–22 EDMAC, 6–23 HIGH-RATE ESC, 6–25 1:1 manual switch, 6–41 IMPEDANCE, 6–29 16-QAM Viterbi, Rate 3/4, 7-25 INSERT TIMESLOTS, 6–23 8-PSK/TPC Coding Summary 7-6 MASKS, 6–27 8-PSK/TPC Rate 2/3, 7-20 REMOTE CONTROL, 6–26 RX, 6–14 RX PARAMTERS, 6–39 STATISTICS, 6–29 Activation Procedure, 1–6...
  • Page 228 CDM-600 Satellite Modem Revision 7 Index MN/CDM600.IOM EbNo Alarm Pt, 6–19 Loop-Timed, 10–2, 16–14 EIA-232, 1–3, 4–3, 4–4, 6–26, 9–1, 9–2, 9– 3, 10–1, 14–1, 15–6, 15–7, 15–9, 16–1, 16–2, 16–3, A–1 M&C Connection, 11–2 EIA-485, 6–26, 15–9, 16–1, 16–2, 16–3 Main Menu, 6–5...
  • Page 229 CDM-600 Satellite Modem Revision 7 Index MN/CDM600.IOM Time Slot Selection, 10–8 Transmit Clocking, 10–1 Unpacking, 2–1 UTILITIES, 6–40 Verification, 1–3 Viterbi, 1–1, 1–4, 3–1, 6–2, 6–10, 6–15, 15– 2, 15–3, 16–17 X.21 Notes, 10–3 i–3...
  • Page 230 CDM-600 Satellite Modem Revision 7 Index MN/CDM600.IOM Notes: i–4...

  • Page 231: Metric Conversions

    METRIC CONVERSIONS Units of Length Unit Centimeter Inch Foot Yard Mile Meter Kilometer Millimeter 1 centimeter — 0.3937 0.03281 0.01094 6.214 x 10 0.01 — — 1 inch 2.540 — 0.08333 0.2778 1.578 x 10 0.254 — 25.4 1 foot 30.480 12.0 —...
  • Page 232 2114 85281 WEST TH STREET TEMPE ARIZONA 480 • 333 • 2200 PHONE 480 • 333 • 2161...

Table of Contents