Radyne ComStream DM240-DVB User manual

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DM240-DVB
High-Speed
Digital Modulator
Installation and Operation Manual
TM083
Revision 3.0
Radyne ComStream, Inc. •3138 E. Elwood St. •Phoenix, AZ 85034 •[phone] •Fax: [phone] •www.radn.com

DM240-DVB High-Speed Digital Modulator Warranty Policy
TM083 – Rev. 3.0 iii
Warranty Policy WP
Radyne ComStream, Inc. (Seller) warrants the items manufactured and sold by Radyne ComStream, Inc. to
be free of defects in material and workmanship for a period of two (2) years from date of shipment Radyne
ComStream, Inc.’s obligation under its warranty is limited in accordance with the periods of time and all
other conditions stated in all provisions of this warranty.
This warranty applies only to defects in material and workmanship in products manufactured by Radyne
ComStream, Inc. Radyne ComStream, Inc. makes no warranty whatsoever concerning products or
accessories not of its manufacture. Repair, or at the option of Radyne ComStream, Inc., replacement of the
Radyne ComStream, Inc. products or defective parts therein shall be the sole and exclusive remedy for all
valid warranty claims.
Warranty Period
The applicable warranty period shall commence on the date of shipment from a Radyne ComStream, Inc.
facility to the original purchaser and extend for the stated period following the date of shipment. Upon
beginning of the applicable Radyne ComStream, Inc. warranty period, all customers’ remedies shall be
governed by the terms stated or referenced in this warranty. In-warranty repaired or replacement products
or parts are warranted only for the remaining unexpired portion of the original warranty period applicable to
the repaired or replaced products or parts. Repair or replacement of products or parts under warranty does
not extend the original warranty period.
Warranty Coverage Limitations
The following are expressly not covered under warranty:
1. Any loss, damage and/or malfunction relating in any way to shipping, storage, accident, abuse,
alteration, misuse, neglect, failure to use products under normal operating conditions, failure to use
products according to any operating instructions provided by Radyne ComStream, Inc., lack of
routine care and maintenance as indicated in any operating maintenance instructions, or failure to
use or take any proper precautions under the circumstances.
2. Products, items, parts, accessories, subassemblies, or components which are expendable in
normal use or are of limited life, such as but not limited to, bulbs, fuses, lamps, glassware, etc.
Radyne ComStream, Inc. reserves the right to revise the foregoing list of what is covered under this
warranty.
Warranty Replacement and Adjustment
Radyne ComStream, Inc. will not make warranty adjustments for failures of products or parts, which occur
after the specified maximum adjustment period. Unless otherwise agreed, failure shall be deemed to have
occurred no more than seven (7) working days before the first date on which Radyne ComStream, Inc.
receives a notice of failure. Under no circumstances shall any warranty exceed the period stated above
unless expressly agreed to in writing by Radyne ComStream, Inc.
Liability Limitations
This warranty is expressly in lieu of and excludes all other express andimplied warranties, Including but not
limited to warranties of merchantability and of fitness for particular purpose, use, or applications, and all
other obligations or liabilities on the part of Radyne ComStream, Inc., unless such other warranties,
obligations, or liabilities are expressly agreed to in writing by Radyne ComStream, Inc.
All obligations of Radyne ComStream, Inc. under this warranty shall cease in the event its products or parts
thereof have been subjected to accident, abuse, alteration, misuse or neglect, or which have not been
operated and maintained in accordance with proper operating instructions.

Warranty Policy DM240-DVB High-Speed Digital Modulator
iv TM083 - Rev. 3.0
In no event shall Radyne ComStream, Inc. be liable for Incidental, consequential, special or resulting loss or
damage of any kind howsoever caused. Radyne ComStream, Inc.’s liability for damages shall not exceed
the payment, if any, received by Radyne ComStream, Inc. for the unit or product or service furnished or to
be furnished, as the case may be, which is the subject of claim or dispute.
Statements made by any person, including representatives of Radyne ComStream, Inc., which are
inconsistent or in conflict with the terms of this warranty, shall not be binding upon Radyne ComStream, Inc.
unless reduced to writing and approved by an officer of Radyne ComStream, Inc.
Warranty Repair Return Procedure
Before a warranty repair can be accomplished, a Repair Authorization must be received. It is at this time
that Radyne ComStream, Inc. will authorize the product or part to be returned to the Radyne ComStream,
Inc. facility or if field repair will be accomplished. The Repair Authorization may be requested in writing or by
calling:
Radyne ComStream, Inc.
3138 E. Elwood St.
Phoenix, Arizona 85034 (USA)
ATTN: Customer Support
Phone: [phone]
Fax: [phone]
Any product returned to Radyne ComStream, Inc. for examination must be sent prepaid via the means of
transportation indicated as acceptable to Radyne ComStream, Inc. Return Authorization Number must be
clearly marked on the shipping label. Returned products or parts should be carefully packaged in the
original container, if possible, and unless otherwise indicated, shipped to the above address.
Non-Warranty Repair
When a product is returned for any reason, Customer and its shipping agency shall be responsible for all
damage resulting from improper packing and handling, and for loss in transit, not withstanding any defect or
nonconformity in the product. By returning a product, the owner grants Radyne ComStream, Inc. permission
to open and disassemble the product as required for evaluation. In all cases, Radyne ComStream, Inc. has
sole responsibility for determining the cause and nature of failure, and Radyne ComStream, Inc.’s
determination with regard thereto shall be final.

DM240-DVB High-Speed Digital Modulator Preface
TM083 – Rev. 3.0 v
Preface P
This manual provides installation and operation information for the Radyne ComStream DM240-
DVB High-Speed Digital Modulator. This is a technical document intended for use by engineers,
technicians, and operators responsible for the operation and maintenance of the DM240-DVB.
Conventions
Whenever the information within this manual instructs the operator to press a pushbutton switch
or keypad key on the Front Panel, the pushbutton or key label will be shown enclosed in "less
than" (<) and "greater than" (>) brackets. For example, the Reset Alarms Pushbutton will be
shown as <RESET ALARMS>, while a command that calls for the entry of a ‘7’ followed by
‘ENTER’ Key will be represented as <7,ENTER>.
Cautions and Warnings
A caution icon indicates a hazardous situation that if not avoided, may result in minor or moderate
injury. Caution may also be used to indicate other unsafe practices or risks of property damage.
A warning icon indicates a potentially hazardous situation that if not avoided, could result in death
or serious injury.
A note icon identifies information for the proper operation of your equipment, including helpful
hints, shortcuts, or important reminders.

Preface DM240-DVB High-Speed Digital Modulator
vi TM083 - Rev. 3.0
Trademarks
Product names mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereby acknowledged.
Copyright
2004, Radyne ComStream, Inc. This manual is proprietary to Radyne ComStream, Inc. and is
intended for the exclusive use of Radyne ComStream, Inc.’s customers. No part of this document
may in whole or in part, be copied, reproduced, distributed, translated or reduced to any
electronic or magnetic storage medium without the express written consent of a duly authorized
officer of Radyne ComStream, Inc.
Disclaimer
This manual has been thoroughly reviewed for accuracy. All statements, technical information,
and recommendations contained herein and in any guides or related documents are believed
reliable, but the accuracy and completeness thereof are not guaranteed or warranted, and they
are not intended to be, nor should they be understood to be, representations or warranties
concerning the products described. Radyne ComStream, Inc. assumes no responsibility for use
of any circuitry other than the circuitry employed in Radyne ComStream, Inc. systems and
equipment. Furthermore, since Radyne ComStream, Inc. is constantly improving its products,
reserves the right to make changes in the specifications of products, or in this manual at any time
without notice and without obligation to notify any person of such changes.
Record of Revisions
Revision
Level Date Reason for Change
1.0 6-16-00 New Release.
1.1 9-20-00 Changed menus in Section 3.
2.0 3-1-01 Revised Manual.
2.1 10-9-01 Revised Sections 5.9.4,5.11, 5.12 and 7.5, Figures 5-1a and 5-1b, and
Section 4 table numbers.
2.2 11-26-01 Revised Sections 4.2, 4.3, 4.5, and 4.6.
2.3 1-18-02 Added SNMP Section 4.5.
2.4 6-3-02 Revised Sections 4.2.6, 4.3, and 4.6.
3.0 12-6-04 Revised manual to include DVB-S2
Comments or Suggestions Concerning this Manual
Comments or suggestions regarding the content and design of this manual are appreciated. To
submit comments, please contact the Radyne ComStream, Inc. Customer Service Department.

DM240-DVB High-Speed Digital Modulator Table of Contents
TM083 – Rev. 3.0 vii
Table of Contents ToC
Section 1 - Introduction
1.0 Description______________________________________________________1-1
Section 2 - Installation
2.0 Installation Requirements___________________________________________2-1
2.1 Unpacking ______________________________________________________2-2
2.2 Removal and Assembly ____________________________________________2-2
2.3 Mounting Considerations ___________________________________________2-2
2.4 Modulator Checkout_______________________________________________2-2
2.4.1 Initial Power-Up_________________________________________________2-3
Section 3 - Theory of Operation
3.0 Theory of Operation_______________________________________________3-1
3.1 DVB-S Operation _________________________________________________3-1
3.2 DVB-S2-BS-NBC Operation_________________________________________3-2
Section 4 - User Interfaces
4.0 User Interfaces___________________________________________________4-1
4.1 Front Panel User Interface__________________________________________4-1
4.1.1 Front Panel LCD Display__________________________________________4-2
4.1.2 Front Panel LED Indicators________________________________________4-2
4.1.3 Front Panel Keypad______________________________________________4-2
4.1.4 Parameter Setup________________________________________________4-2
4.2 Front Panel Control Screen Menus ___________________________________4-5
4.2.1 Main Menus ___________________________________________________4-5
4.2.2 Modulator Menu Options and Parameters_____________________________4-6
4.2.3 Interface Menu Options and Parameters______________________________4-7
4.2.3.1 Plug-In Interface Card (PIIC) _____________________________________4-7
4.2.3.2 Non-PIIC ____________________________________________________4-9
4.2.4 RF Switch Menu Options and Parameters____________________________4-10

Table of Contents DM240-DVB High-Speed Digital Modulator
viii TM083 - Rev. 3.0
4.2.5 Monitor Menu Options and Parameters______________________________4-11
4.2.6 Alarms Menu Options and Parameters ______________________________4-11
4.2.7 System Menu Options and Parameters______________________________4-12
4.2.8 Test Menu Options and Parameters ________________________________4-16
4.9 Remote Port User Interface ________________________________________4-17
4.9.1 Protocol Structure ______________________________________________4-17
4.9.2 Protocol Wrapper ______________________________________________4-17
4.9.3 Frame Description and Bus Handshaking ____________________________4-19
4.9.4 Global Response Operational Codes _______________________________4-20
4.9.5 Collision Avoidance_____________________________________________4-21
4.9.6 Software Compatibility___________________________________________4-22
4.9.7 RLLP Summary________________________________________________4-23
4.10 Ethernet Port User Interface_______________________________________4-23
4.11 Simple Network Management Protocol (SNMP)________________________4-23
4.12 The Management Information Base (MIB) ____________________________4-24
4.13 Terminal Port User Interface ______________________________________4-26
Section 5 - Rear Panel Interfaces
5.0 DM240 Connections_______________________________________________5-1
5.1 AC Power_______________________________________________________5-2
5.2 PCMCIA Interface ________________________________________________5-2
5.2.1 Feature Upgrade________________________________________________5-3
5.2.2 Firmware Update________________________________________________5-3
5.2.3 Custom Configuration ____________________________________________5-3
5.3 Ethernet Interface (I/O)_____________________________________________5-3
5.4 External Reference (Input)__________________________________________5-4
5.5 Remote Port (I/O)_________________________________________________5-4
5.6 Terminal Port (I/O) ________________________________________________5-4
5.7 Alarm Port ______________________________________________________5-4
5.8 IF Port (Output) __________________________________________________5-5
5.9 RF Switch Control ________________________________________________5-6
5.10 ASI/Parallel RS-422 Interface_______________________________________5-6
5.10.1 M2P (Parallel, RS-422, J8) _______________________________________5-6
5.10.2 DVB (Parallel, RS-422, J8) _______________________________________5-7
5.10.3 ASI (Asynchronous Serial Interface, J12) ____________________________5-8

DM240-DVB High-Speed Digital Modulator Table of Contents
TM083 – Rev. 3.0 ix
5.10.4 AASI (Advanced Asynchronous Serial Interface, J12)___________________5-8
5.11 ASI/Parallel LVDS Interface________________________________________5-8
5.12 Serial RS-422 Interface ___________________________________________5-9
5.13 G.703 Interface _________________________________________________5-9
5.14 HSSI Interface _________________________________________________5-10
5.15 Plug-In Interface Cards (PIICs) ____________________________________5-11
5.15.1 ASI PIIC ____________________________________________________5-11
5.15.1.1 ASI (Asynchronous Serial Interface)______________________________5-12
5.15.1.2 AASI (Advanced Asynchronous Serial Interface) ____________________5-12
5.15.2 ASI Monitor__________________________________________________5-12
5.15.3 Parallel RS-422 Interface _______________________________________5-12
5.15.3.1 M2P ______________________________________________________5-12
5.15.3.1 DVB ______________________________________________________5-12
5.15.4 Parallel LVDS Interface_________________________________________5-12
Section 6 - Maintenance and Troubleshooting
6.0 Periodic Maintenance______________________________________________6-1
Section 7 - Technical Specifications
7.0 Introduction _____________________________________________________7-1
7.1 IF Specification___________________________________________________7-1
7.2 Baseband Specification ____________________________________________7-1
7.3 Interface Types Available___________________________________________7-2
7.4 Monitor and Control _______________________________________________7-3
7.5 Environmental ___________________________________________________7-3
7.6 Physical ________________________________________________________7-3
7.7 Options _________________________________________________________7-3
Appendix A - Remote Operations
A.0 DM240 Opcode Command Set_____________________________________ A-1
A.1 Modulator Command Set__________________________________________ A-1
A.2 Detailed Command Descriptions ____________________________________ A-3

Table of Contents DM240-DVB High-Speed Digital Modulator
x TM083 - Rev. 3.0
Appendix B - SNMP MIB_____________________________________________ B-1
Glossary _________________________________________________________ G-1

DM240-DVB High-Speed Digital Modulator Introduction
TM083 – Rev. 3.0 1-1
Introduction 1
This chapter provides an overview of the DM240-DVB High-Speed Digital Modulator. The
DM240 will be referred to in this manual as “the DM240”, “the modulator”, or “the unit”.
1.0 Description
The New Standard in Digital Modulator Performance
Radyne ComStream’s DM240 family of High-Speed Modulators is the ideal choice to meet the
exacting standards of High Data-Rate Video, Internet and Fiber Restoral Satellite Applications.
The DM240 meets the various international standards and supports BPSK, QPSK, 8PSK and
16QAM applications with symbol rates up to 68 Msps. With a variety of data interfaces available,
the DM240 is configurable to meet high-speed satellite applications.
The powerful new onboard Monitor and Control (M&C) processor has the unique capability to
download firmware and enhance features from a field-changeable PCMCIA Card. Offering
unprecedented flexibility, this feature represents a new level of Radyne ComStream’s outstanding
Customer Support. Additionally, features are added to the installed equipment base with extreme
ease, allowing the equipment to expand with changes in service while lowering initial installation
budgets.
The Modulator offers a frequency-agile IF Output from 50 to 90, 100 to 180 MHz (70/140), or 950
to 1750 MHz (L-Band) in 100 Hz steps. Variable data rates from 1 Mbps to 238 Mbps can be set
in 1 bps steps.
Additional features include the choice of remotely interfacing through one of three onboard
connections: 10 Base-T/100 Base-T Ethernet, RS-485, or RS-232. The familiar Radyne
ComStream Front Panel (Figure 1-1) offers push-button control of all features and a backlit LCD
display. Menus are specifically designed for ease of use and quick online operation as well as
changes in all modulator configurations.
Three Plug-In Interface Card (PIIC) Slots on the rear of the unit allows the customer to plug in a
variety of interfaces. These PIICs provide greater flexibility for changing and upgrading the
terrestrial interface.
An optional 1:1 Redundancy Control Switch (RCS11) is available to provide the DM240 with
superior system reliability.
Figure 1-1. DM240-DVB

Introduction DM240-DVB High-Speed Digital Modulator
1-2 TM083 - Rev. 3.0

DM240-DVB High-Speed Digital Modulator Installation
TM083 – Rev. 3.0 2-1
Installation 2
This section provides unpacking and installation instructions, and a description of external
connections and backward alarm information.
2.0 Installation Requirements
The DM240 can be installed within any standard 19-inch equipment cabinet or rack, and requires
1 RU mounting space (1.75 inches) vertically and 17 inches of depth. Including cabling, a
minimum of 20-inches of rack depth is required. The rear panel of the DM240 is designed to
have power enter from the left and IF cabling enter from the right when viewed from the rear of
the unit. Data and control cabling can enter from either side although they are closer to the
center. The unit can be placed on a table or suitable surface if required.
There are no user-serviceable parts or configuration settings located
inside the DM240 Chassis. There is a potential shock hazard internally at
the power supply module. DO NOT open the DM240 Chassis under any
circumstances.
Before initially applying power to the unit, it is a good idea to disconnect
the transmit output from the operating ground station equipment. This is
especially true if the current DM240 configuration settings are unknown,
where incorrect settings could disrupt existing communications traffic.

Installation DM240-DVB High-Speed Digital Modulator
2-2 TM083 - Rev. 3.0
2.1 Unpacking
The DM240 Modulator was carefully packaged to avoid damage and should arrive complete with
the following items for proper installation:
1. DM240 Unit.
2. PCMCIA Card. May be installed, depending upon configuration. If no card is
installed, the unit has been factory configured.
3. Power Cord, 6-foot with applicable AC connector.
4. Installation and Operation Manual.
2.2 Removal and Assembly
Carefully unpack the unit and ensure that all of the above items are in the carton. If the Prime AC
power available at the installation site requires a different power cord/AC connector, then
arrangements to receive the proper device will be necessary before proceeding with the
installation.
The DM240 modulator is shipped fully assembled. It does not require removal of the covers for
any purpose in installation. The only replaceable assembly in the unit is the data interface and is
not intended to be accomplished in the field. Should the power cable AC connector be of the
wrong type for the installation, either the cable or the power connector end should be replaced.
The power supply itself is designed for universal application using from 100 to 240 VAC, 50 to
60 Hz, < 40 W.
2.3 Mounting Considerations
When mounted in an equipment rack, adequate ventilation must be provided. The ambient
temperature in the rack should be between 10°and 35°C, and held constant for best equipment
operation. The air available to the rack should be clean and relatively dry. The DM240 units may
be stacked one on top of the other up to a maximum of 10 consecutive units before providing a
1 RU space for airflow.
Do not mount the DM240 in an unprotected outdoor location where there is direct contact with
rain, snow, wind or sun. The DM240 is designed for indoor applications only.
The only tools required for rack mounting the DM240 is a set of four rack mounting screws and an
appropriate screwdriver. Rack mount brackets are an integral part of the cast front bezel of the
unit and are not removable.
Shielded cables with the shield terminated to the conductive backshells are required in order to
meet EMC directives. Cables with insulation flammability ratings of 94 VO or better are required
in order to meet low voltage directives.
2.4 Modulator Checkout
The following descriptions assume that the DM240 is installed in a suitable location with prime AC
power and supporting equipment available.

DM240-DVB High-Speed Digital Modulator Installation
TM083 – Rev. 3.0 2-3
2.4.1 Initial Power-Up
Before initial power up of the DM240, it is a good idea to disconnect the
transmit output from the operating ground station equipment. This is
especially true if the current modulator configuration settings are
unknown, where incorrect setting could disrupt existing communications
traffic. New units from the factory are normally shipped in a default
configuration which includes setting the transmit carrier off.
Turn the unit ‘ON’ by placing the rear panel switch (above the power entry connector) to the ‘ON’
position. Upon initial and subsequent power-ups, the DM240 microprocessor will test itself and
several of its components before beginning its main Monitor/Control program. These power-up
diagnostics show no results if successful. If a failure is detected, the Fault LED is illuminated.
The initial field checkout of the DM240 can be accomplished from the front panel, Terminal Port,
Remote Port, or Ethernet Port.

Installation DM240-DVB High-Speed Digital Modulator
2-4 TM083 - Rev. 3.0

DM240-DVB High-Speed Digital Modulator Theory of Operation
TM083 – Rev. 3.0 3-1
Theory of Operation 3
3.0 Theory of Operation
The advanced hardware/software architecture of the DM240 allows a single piece of hardware to
be configured for a variety of different applications. Several of these hardware/software platforms
are listed in the next sections. Custom applications are available.
The basic operation of each platform is similar. A digital terrestrial interface supplies the
modulator with a data stream. The data stream is synchronized if the incoming stream is framed.
The data is scrambled, and FEC is added. The data is then convolutionally encoded, punctured,
then constellation mapped. The resulting I&Q Symbols are digitally filtered. The data is then
converted into an analog waveform and is vector modulated onto an RF Carrier produced from
the Transmit IF Synthesizer Circuitry.
Since the baseband processing is completely digital, many different variations of signal
processing can be performed. Therefore, the DM240 is one of the most flexible digital
modulators available today.
3.1 DVB-S Operation
The DVB-S version of the DM240 complies with both EN300-421 and EN301-210 ETSI
Specifications.
A block diagram of the signal flow is shown in Figure 3-1 below.
Figure 3-1. Functional Block Diagram

Theory of Operation DM240-DVB High-Speed Digital Modulator
3-2 TM083 - Rev. 3.0
3.2 DVB-S2-BS-NBC Operation
The DVB-S2-BS-NBC version of the DM240 complies with the ETSI EN 302 307 V1.1.1 (2004-
01) specification for non-backward compatible broadcast services.
A block diagram of the signal flow is shown in Figure 3-2 below.
Terrestrial
Interface
PRBS
Generator
Terrestrial
Buffer CRC-8 Encoder Slicer
BCH
Encoder LDPC Encoder Bit Interleaver
BB
Filter
PL
Framing
DVB
Sync
PLL
IQ
Modulator
Tx Clock
Symbol Clock
Stream
Adaptation
Mapping IF Out
Tx Data
SCT
SCTE
DDS
Figure 3-2. Functional Block Diagram

DM240-DVB High-Speed Digital Modulator User Interfaces
TM083 – Rev. 3.0 4-1
User Interfaces 4
4.0 User Interfaces
There are four user interfaces available for the DM240 family of products. These are:
a. Front Panel
b. Remote Port
c. Ethernet Port
d. Terminal
4.1 Front Panel User Interface
The front panel of the DM240 allows for complete control and monitor of all DM240 parameters
and functions via a keypad, LCD display and status LEDs.
The front panel layout is shown in Figure 4−1, showing the location and labeling of the front
panel. The front panel is divided into three functional areas: the LCD display, the Keypad and the
LED Indicators, each described below in Table 4-1.
Figure 4-1. DM240 Front Panel
Table 4-1.
Item Number Description Function
1 LCD Front Panel Display Displays DM240 Operating parameters
and Configuration data.
2 Cursor Control Arrows Controls the up, down, right and left
motion of the cursor in the LCD Display
window (see Figure x-x).
3 Numeric Keypad Allows entry of numeric data and Clear
and Enter function keys.
4 Operational Function LEDs See Table 4-2 for a description of these
LED Indicators.