Comtech Cdm 600 Manual
View and Download Comtech EF Data CDM-600 installation and operation manual online. Open Network Satellite Modem (2.4 kbps – 20 Mbps). CDM-600 Modem pdf manual. Download >> Download Comtech cdm-700 manual Read Online >> Read Online Comtech cdm-700 manual Comtech EF Data CRS-300 1:N Redundancy Switch The CRS-300 1:10 modem. CDM-570/570L Installation and Operation Manual CDM-570 - 70/140 MHz Satellite Modem CDM-570L. Comtech EF Data Documentation Update Subject.
. 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. 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.
CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM. 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 –. 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). 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. 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. CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM 10.2.3 Buffer Enabled, RXTX (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. 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. 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.
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. 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. 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.
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. 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. (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. 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.
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. 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.
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). 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. 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. 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. 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).
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’. 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. CDM-600 Satellite Modem Revision 7 Introduction MN/CDM600.IOM This page is intentionally blank. 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. 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. 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.
‘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.
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). 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. 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.
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. 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. 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). 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. CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM Dimensional Envelope Figure 4-3. Dimensional Envelope 4–6. CONNECTOR PINOUTS Connector Overview The rear panel connectors (Figure 5-1) provide all necessary external connections between the modem and other equipment. 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).
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. BNC Connectors BNC Connector Reference Description Direction RX-IF RX-IF signals. 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. 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.
Audio Interface Connector Pin Assignments. 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. IDR Alarm Interface Connector Pin Assignments. 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.
Auxiliary Serial Connector (USB Type B Socket) Pin # Description Direction Ground. 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. CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM This page is intentionally left blank.
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. 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. Front Panel LED Indicators Color Condition A Unit Fault exists (Example: PSU fault) Unit Orange No Unit Faults, but a Traffic Fault exists. 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.
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. 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.
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.
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. 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). 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. 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. 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:. 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. 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. 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.
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. 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:.
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.
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. 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.
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. 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. 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. 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. 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. 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. 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. 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.
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. 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). 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. CDM-600 Satellite Modem Revision 7 Front Panel Operation MN/CDM600.IOM Figure 6-4. Loopback Modes 6–31. 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. 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.
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. 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. 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. 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. 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.
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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). 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. 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. 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. 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).
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. 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. 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. – 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. 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.
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. 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. 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. 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.
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.
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. 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. 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. 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. 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.
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. 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.
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. 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. 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. 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. 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.
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. 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.
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. 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. 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. 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. CDM-600 Satellite Modem Revision 7 Forward Error Correction Options MN/CDM600.IOM This page is intentionally blank 7–30. 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.
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. 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. 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.
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. 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.
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. 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. CDM-600 Satellite Modem Revision 7 Open Network Operations MN/CDM600.IOM This page is intentionally blank 9–6. 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. 10.1.4 Rx Loop-Timed, RXTX (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. 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. 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. 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. 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. 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.
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.
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:. 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. 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.
CDM-600 Satellite Modem Revision 7 Clock Modes and Drop and Insert (D&I) MN/CDM600.IOM This page is intentionally left blank. 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. 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. 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. 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. 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. 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. 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). 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. 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. 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.
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.
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. 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.
Download Read Online Comtech EF Data CRS-300 1:N Redundancy Switch The CRS-300 1:10 modem fully automatic or manual redundancy for the following modems: CDM- 570/570L, CDM-600/ 600L, CDM-625, CDM-Qx/QxL, CDM-700, CDM-710, and SLM-565. Home » Support » Software Downloads » Flash & Software Update Files » Satellite Modems » CDM-700 Software Downloads. CDM-700 Software Downloads Comtech EF Data brand modem documentation.
CDM-625 Manual - rev15 CDM-625A Manual - rev4 CDM-700 Manual rev5 CDM-710 Manual - rev12 CDM-700. /uploads/6c/5d/6c5df62899afe99f14c59bade48f637d/thumb-Comtech-70-140MHz The Comtech EFData CDM-700 High Speed Satellite Modem intended for operation with a range of multi-port data interfaces. Manual.pdf Accessory Product for use only with Comtech EF Data CDM-625A, CDM-625. CDM-850 4.6 Configure the CDM-710GLs, -710s, or -700s for 1:1 Redundancy. View and Download Comtech EF Data CDM-700 installation and operation manual online. High Speed Satellite Modem. CDM-700 Modem pdf manual Data sheets for Comtech EFData Satellite Equipment.
Range of products, and consequently a large number of datasheets and manuals. CDM-700 Modem 12 Dec 2008 CDM-700. High Speed Satellite Modem.
Installation and Operation Manual. IMPORTANT NOTE: The information contained in this document Manual for CDM-700, made by Comtech EF Data (Comtech EF Data) Cds-100, Diversity switch installation and operation manual. Read online or download PDF.
Comtech EF Accessory Product for use only with Comtech EF Data CDM-625/A, CDM-850, CDM-710GL, CDM-710, and CDM-700 Modems.,.