IMPORTANT NOTE: The information contained in this document supersedes all previously published
information regarding this product. Product specifications are subject to change without prior notice.
CDM-710
Broadcast Satellite Modem
Installation and Operation Manual
CDM-710 [70-140 MHz] Broadcast Satellite Modem
CDM-710L [L-Band] Broadcast Satellite Modem
For Firmware Version 4.1.10 or Higher
Part Number MN/CDM710.IOM / CD-MNCDM710 Revision 12
Comtech EF Data, 2114 West 7th Street, Temp e, Arizona 85 281 USA, 480.333.2200, FAX: 480.333.2161
This manual provides installation and operation information for the Comtech EF
Data 70-140 MHz CDM-710 Broadcast Satellite Modem and its L-Band
counterpart, the CDM-710L. This is an informational document intended for the
persons responsible for the operation and maintenance of the CDM-710 and the
CDM-710L.
Revision 12 of this manual represents a complete rewrite from Revision 11, in
order to update the documentation format to current Comtech EF Data
Technical Publications Department Standards and Practices.
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CDM-710/L Broadcast Satellite Modem MN/CDM710.IOM
equipment.
Preface Revision 12
Conventions and References
Patents and Trademarks
See all of Comtech EF Data's Patents and Patents Pending at
http://patents.comtechefdata.com.
Comtech EF Data acknowledges that all trademarks are the property of the
trademark owners.
Warnings, Cautions, Notes, and References
A WARNING gives information about a possible hazard that may cause
death or serious injury.
A CAUTION gives information about a possible hazard that may cause
injury or property damage.
A NOTE gives you important information about a task or the
A REFERENCE directs you to additional information about a task or the
equipment.
Electronic Industries Association (EIA) designations supersede Recommended
Standard (RS) designations. Reference to the old RS designations may appear
when depicting actual text (e.g., RS-232) as it may appear on the product rear
panels or on screens or pages in the Serial Remote or HTTP (Web Server)
Interfaces. All other references in the manual specify the EIA designations.
CAUTION
YOU SHOULD CAREFULLY REVIEW THE FOLLOWING INFORMATION.
Safety and Compliance
Electrical Safety and Compliance
The unit complies with the EN 60950 Safety of Information Technology
Equipment (Including Electrical Business Machines) safety standard.
The unit is rated for operation over the range 100 to 240 VAC. It has a maximum
power consumption of 88 watts, and draws a maximum of 770 mA.
Class I Pluggable Equipment Type A-Protective Earthing
The cable distribution system/telecommunication network of this product relies
on protective earthing. The integrity of the protective earthing must be ensured.
In Finland:
"Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan."
In Norway:
“Apparatet må tilkoples jordet stikkontakt.”
In Sweden:
“Apparaten skall anslutas till jordat uttag.”
In Denmark:
"Apparatets stikprop skal tilsluttes en stikkontakt med jord, som giver
forbindelse til stikproppens jord."
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CDM-710/L Broadcast Satellite Modem MN/CDM710.IOM
Do not connect the unit without a direct connection to ground.
Preface Revision 12
Galvanic Isolator Use
In Norway:
“Utrustning som är kopplad till skyddsjord via jordat vägguttag och/eller via
annan utrustning och samtidigt är kopplad till kabel-TV nät kan i visa fall medfőra risk főr brand. Főr att undvika detta skall vid anslutning av utrustningen till kabelTV nät galvanisk isolator finnas mellan utrustningen och kabel-TV nätet.”
Restricted Access Location
In Nordic Countries, equipotential bonding should be applied using the
permanently connected ground stud by a qualified service person.
Battery Warning
CAUTION
There is risk of explosion if you replace your battery with an incorrect
type. Dispose of used batteries according to the instructions.
Electrical Installation
CAUTION
Connect the ground stud, located on the modem rear panel, to a
power system that has separate ground, line, and neutral conductors.
Chapter 4.2.3. Unit Ground Connection
Fusing
CAUTION
For continued operator safety, always replace the fuses with the
correct type and rating.
Chapter 4.2 Unit Connectors
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CDM-710/L Broadcast Satellite Modem MN/CDM710.IOM
CAUTION
Preface Revision 12
The unit is fitted with two fuses – one each for line and neutral connections.
They are contained inside a press-fit fuse holder that is part of the IEC power
module:
• Use T2.00A 20mm fuses for 115 and 230 volt AC operation.
• Use T6.25A 6.3 x 32mm fuses for 48 volt DC operation.
Operating Environment
Do not operate the unit in any of these extreme operating conditions:
• Ambient temperatures less than 0° C (32° F) or more than 50° C
(122° F).
• Precipitation, condensation, or humid atmospheres of more than
95% relative humidity.
• Unpressurized altitudes of more than 2000 metres (6561.7 feet).
• Excessive dust.
• Flammable gases.
• Corrosive or explosive atmospheres.
European Union Radio Equipment and Telecommunications
Terminal Equipment (R&TTE) Directive (1999/5/EC) and EN
301 489-1
Independent testing verifies that the unit complies with the European Union
R&TTE Directive, its reference to EN 301 489-1 (Electromagnetic compatibility
and Radio spectrum Matters [ERM]; ElectroMagnetic Compatibility [EMC]
standard for radio equipment and services, Part 1: Common technical
requirements), and the Declarations of Conformity for the applicable directives,
standards, and practices that follow:
European Union Electromagnetic Compatibility (EMC) Directive
(2004/108/EC)
•Emissions: EN 55022 Class B – Limits and Methods of Measurement of Radio
Interference Characteristics of Information Technology Equipment.
•Immunity: EN 55024 – Information Technology Equipment: Immunity
Characteristics, Limits, and Methods of Measurement.
• EN 61000-3-2 – Harmonic Currents Emission
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CDM-710/L Broadcast Satellite Modem MN/CDM710.IOM
Operate the units with their covers on at all times.
<HAR>
!
Preface Revision 12
• EN 61000-3-3 – Voltage Fluctuations and Flicker.
• Federal Communications Commission Federal Code of Regulation FCC Part
15, Subpart B.
CAUTION
Obey these instructions to make sure that the unit complies with the
standards:
• Use coaxial cable that is of good quality for connections to the
L-Band Type ‘N’ Rx (receive) female connector.
• Use Type 'D' connectors that have back-shells with continuous
metallic shielding.
• Type ‘D’ cabling must have a continuous outer shield (either
foil or braid, or both). The shield must be bonded to the backshell.
•
European Union Low Voltage Directive (LVD) (2006/95/EC)
Type of power cord required for use in the European Community.
CAUTION: Double-pole/Neutral Fusing
ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung
This unit satisfies (with exemptions) the requirements specified in the European
Union Directive on the Restriction of Hazardous Substances in Electrical and
Electronic Equipment (EU RoHS, Directive 2002/95/EC).
European Union Telecommunications Terminal Equipment Directive
(91/263/EEC)
In accordance with the European Union Telecommunications Terminal
Equipment Directive 91/263/EEC, the unit should not be directly connected to
the Public Telecommunications Network.
CE Mark
Comtech EF Data declares that the unit meets the necessary requirements for
the CE Mark.
Product Support
For all product support, please call:
+1.240.243.1880
+1.866.472.3963 (toll free USA)
Comtech EF Data Headquarters
http://www.comtechefdata.com
Comtech EF Data Corp.
2114 West 7th Street
Tempe, Arizona USA 85281
+1.480.333.2200
Warranty Policy
Comtech EF Data products are warranted against defects in material and
workmanship for a specific period from the date of shipment, and this period
varies by product. In most cases, the warranty period is two years. During the
warranty period, Comtech EF Data will, at its option, repair or replace products
that prove to be defective. Repairs are warranted for the remainder of the
original warranty or a 90 day extended warranty, whichever is longer. Contact
Comtech EF Data for the warranty period specific to the product purchased.
For equipment under warranty, the owner is responsible for freight to Comtech
EF Data and all related customs, taxes, tariffs, insurance, etc. Comtech EF Data is
responsible for the freight charges only for return of the equipment from the
factory to the owner. Comtech EF Data will return the equipment by the same
method (i.e., Air, Express, Surface) as the equipment was sent to Comtech EF
Data.
All equipment returned for warranty repair must have a valid RMA number
issued prior to return and be marked clearly on the return packaging. Comtech
EF Data strongly recommends all equipment be returned in its original
packaging.
Comtech EF Data Corporation’s obligations under this warranty are limited to
repair or replacement of failed parts, and the return shipment to the buyer of
the repaired or replaced parts.
Limitations of Warranty
The warranty does not apply to any part of a product that has been installed,
altered, repaired, or misused in any way that, in the opinion of Comtech EF Data
Corporation, would affect the reliability or detracts from the performance of any
part of the product, or is damaged as the result of use in a way or with
equipment that had not been previously approved by Comtech EF Data
Corporation.
The warranty does not apply to any product or parts thereof where the serial
number or the serial number of any of its parts has been altered, defaced, or
removed.
The warranty does not cover damage or loss incurred in transportation of the
product. The warranty does not cover replacement or repair necessitated by loss
or damage from any cause beyond the control of Comtech EF Data Corporation,
such as lightning or other natural and weather related events or wartime
environments.
The warranty does not cover any labor involved in the removal and or
reinstallation of warranted equipment or parts on site, or any labor required to
diagnose the necessity for repair or replacement.
The warranty excludes any responsibility by Comtech EF Data Corporation for
incidental or consequential damages arising from the use of the equipment or
products, or for any inability to use them either separate from or in combination
with any other equipment or products.
A fixed charge established for each product will be imposed for all equipment
returned for warranty repair where Comtech EF Data Corporation cannot
identify the cause of the reported failure.
Exclusive Remedies
Comtech EF Data Corporation’s warranty, as stated is in lieu of all other
warranties, expressed, implied, or statutory, including those of merchantability
and fitness for a particular purpose. The buyer shall pass on to any purchaser,
lessee, or other user of Comtech EF Data Corporation’s products, the
aforementioned warranty, and shall indemnify and hold harmless Comtech EF
Data Corporation from any claims or liability of such purchaser, lessee, or user
based upon allegations that the buyer, its agents, or employees have made
additional warranties or representations as to product preference or use.
The remedies provided herein are the buyer’s sole and exclusive remedies.
Comtech EF Data shall not be liable for any direct, indirect, special, incidental, or
consequential damages, whether based on contract, tort, or any other legal
theory.
Figure 1-1. CDM-710/L Broadcast Satellite Modem (Original and Current
Production Versions)
The CDM-710 and CDM-710L Broadcast Satellite Modems (Figure 1-1) provide
transmission of data in Digital Video Broadcast (DVB) and generic data
transmission applications. The CDM-710/L operates over satellite links with
programmable symbol / data rates up to 45 Msps in DVB-S2, DVB-S, and
DVB-DSNG modes. The unit is available in modem, modulator-only, and
demodulator-only configurations.
Its companion products, the CDM-710G and CDM-710GL, support non-MPEG2
formats with a variety of data interfaces.
With an ASI interface and either the CDM-710 (70/140 MHz) or CDM-710L
(L-Band) IF, the unit is ideal for video or data transmission formats that take
advantage of the frame structures developed for digital video applications.
Further opportunities are opened with the Gigabit Ethernet option installed. The
terrestrial data interface modules are field-removable to allow swap-out of
interface types. These modules include the CDI-40 ASI, CDI-60 HSSI, and CDI-70
Gigabit Ethernet (GBEI) Data Interfaces.
The CDM-710/L’s bandwidth and power-efficient operation is ideal for:
• Digital Video Broadcast (DVB)
• Digital Satellite News Gathering (DSNG)
• Primary or Backhaul Transmission for:
o Direct-to-Home (DTH)
o Contribution
o Distribution
• Business enterprise data distribution
• Broadband Interactive services
DVB-S2 offers new opportunities for broadcast
applications. With a broad range of modulation and coding
formats, DVB-S2 permits you to tailor a link for the
available bandwidth and power to optimize link performance. Whether a link is
for Direct-to-Home (DTH) or Digital Satellite News Gathering (DSNG),
Contribution or Distribution, there is a format available to suit each application.
1
1.1.2 Standard and Optional Features
Chapter 2. SPECIFICATIONS
The unit is available in two operating frequency versions:
• The CDM-710 (70/140 MHz), with 52 to 88 MHz or 104 to 176 MHz in 100
Hz resolution. The ‘J1 | Tx’ port is a BNC female connector that is
1
ID Number 3424 for the CDM-710. The DVB-S2 logo is a trademark of the DVB Digital Video Broadcasting
programmable for either 50Ω or 75Ω impedance operations. The ‘J3 | Rx’
port is a BNC female connector.
• The CDM-710L (L-Band), with 950 to 2000 MHz in 100 Hz resolution. The
‘J1 | Tx’ and ‘J3 | Rx’ ports are Type ‘N’ female connectors.
Various modulations and coding combinations compliant with DVB-S2 are
provided. This includes DVB-S (QPSK), DVB-DSNG (8PSK and 16QAM), and
DVB-S2 (QPSK, 8PSK, 16APSK, and 32APSK) modes. Constant Coding and
Modulation (CCM) operation is provided. Spectral rolloffs of 20%, 25%, and 35%
are available.
Figure 1-2. CDM-710/L Rear Panel Data Interface Slots
The unit front panel (Figure 1-1) features Light Emitting Diode (LED) array, keypad
and display for local monitor and control of the modem. Remote control is
available via an RS-232 / RS-485 2- or 4-wire bus or 10/100 Base-T Ethernet port
located on the base modem rear panel (Figure 1-2). The rear panel features two
terrestrial data interface slots that accept field-removable modules:
• Appendix D. CDI-70 10/100/1000 BASE-T GIGABIT ETHERNET
INTERFACE (GBEI)
1.1.2.1 Verification
The unit includes a number of tests for rapid verification of the correct
functioning of the unit. Selection of a CW carrier permits measurement of carrier
center frequency or phase noise characteristic. A single-sideband carrier also is
available at the operating symbol rate to check I&Q phase and amplitude
balance. When normal operation is again selected, all previous operating
parameters and values are restored.
1.1.2.2 Firmware Update
Chapter 5. FIRMWARE UPDATE
It is important that you operate the CDM-710/L with its latest available operating
firmware. You may update the firmware without opening the unit by connecting
the unit to the Ethernet port of a Windows-based user PC. Firmware updates are
available for download via the Internet from Comtech EF Data’s web site
(www.comtechefdata.com). You may also acquire updates through e-mail by
request from Comtech EF Data Product Support.
1.1.2.3 Product Upgrade Using Fully Accessible System Topology
(FAST)
Chapter 6. FAST ACTIVATION PROCEDURE
The CDM-710/L offers a number of optional features. To permit a lower initial
cost, you may purchase the unit with only the desired features enabled. If you
wish to upgrade the functionality of your unit at a later date, Comtech EF Data
provides FAST – Fully Accessible System Topology.
FAST permits the purchase and activation of options through special authorization
codes. You may load these Fast Access Codes into the unit locally using the front
panel keypad, or remotely via the serial remote interface located on the modem
rear panel.
You may purchase these unique access codes during normal business hours from
Comtech EF Data Product Support.
Figure 1-3 shows a block diagram of the unit. The unit performs several key
functions:
• It accepts incoming data from the terrestrial interface and converts it into
appropriate clock and data signals.
• The modulator operates on the data to frame and encode it for
transmission.
• Encoded information is mapped for modulation.
• A modulated carrier is transmitted from the IF interface for use by uplink
equipment for delivery to the satellite.
• A carrier received from the satellite link is acquired and demodulated to
recover symbols and timing.
• Error correction and deframing are performed.
• User data is delivered to the to the data interface.
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CDM-710/L Broadcast Satellite Modem MN/CDM710.IOM
first turning off the power to the unit
Introduction Revision 12
Transmit (Tx) data is delivered to the data interface where it is converted to
clock and data signals for further processing. Depending upon the type of
interface, clock and data are provided or in other cases the clock is embedded in
the data and clock recovery is performed to generate clock and data signals.
A First-In–First-Out (FIFO) follows the terrestrial interface to facilitate delivery of
the data to the framing card. Data is passed to the Forward Error Correction
(FEC) Encoder where the data is framed and encoded in accordance with the
DVB-S, DVB-DSNG, or DVB-S2 formats.
After encoding, the data is passed to the modulator where the I&Q signals are
mapped to generate the appropriate constellation (QPSK, 8PSK, 16QAM,
16APSK, and 32APSK) and filtered to provide the desired spectral rolloff.
Finally, a carrier is generated by a frequency synthesizer in conjunction with the
I&Q signals to produce a frequency range, as follows:
• CDM-710 (70/140 MHz), 52 to 88 MHz or 104 to 176 MHz IF output
signal at the rear panel connector
• CDM-710L (L-Band), 950 to 2000 MHz output signal at the rear panel
frequency connector
An Rx carrier from the satellite is received by the demodulator and reverses the
process performed by the modulator. The demodulator has an FEC decoder that
corrects errors incurred during transmission to improve the integrity of the data
delivered to the data interface. A synthesizer in the demodulator is programmed
to select the desired carrier from the transponder.
Physically, the CDM-710/L is comprised of several main card assemblies:
• The optional Data Interface Modules may be quickly plugged into or
removed from the rear panel interface slots.
CAUTION
You must first power down the unit in order to install or
remove a data interface module. Any attempt to install or
remove a module without
will result in damage to the data interface.
• The Framer Card receives signals from the data interface card and routes
signals to the FEC Encoder and Modulator. The microcontroller for the
unit also resides on the Framer Card and is the embedded controller for
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