Radyne OM20 User manual

OM20
Universal
Outdoor Modem
Installation and Operation Manual
TM116
Revision 1.2
Radyne Corporation •3138 E. Elwood St. •Phoenix, AZ 85034 •[phone] •Fax: [phone] •www.radn.com

OM20 Universal Outdoor Modem Warranty Policy
TM116 – Rev. 1.2 iii
Warranty Policy WP
Radyne Corp. (Seller) warrants the items manufactured and sold by Radyne Corp. to be free of defects in
material and workmanship for a period of two (2) years from date of shipment Radyne Corp.’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
Corp. Radyne Corp. makes no warranty whatsoever concerning products or accessories not of its
manufacture. Repair, or at the option of Radyne Corp., replacement of the Radyne Corp. 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 Corp. facility to the
original purchaser and extend for the stated period following the date of shipment. Upon beginning of the
applicable Radyne Corp. 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 Corp., 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 Corp. reserves the right to revise the foregoing list of what is covered under this warranty.
Warranty Replacement and Adjustment
Radyne Corp. 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 Corp. receives a notice of
failure. Under no circumstances shall any warranty exceed the period stated above unless expressly agreed
to in writing by Radyne Corp.
Liability Limitations
This warranty is expressly in lieu of and excludes all other express and implied 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 Corp., unless such other warranties, obligations, or
liabilities are expressly agreed to in writing by Radyne Corp.
All obligations of Radyne Corp. 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.

OM20 Universal Outdoor Modem Warranty Policy
TM116 – Rev. 1.2 iv
In no event shall Radyne Corp. be liable for Incidental, consequential, special or resulting loss or damage of
any kind howsoever caused. Radyne Corp.’s liability for damages shall not exceed the payment, if any,
received by Radyne Corp. 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 Corp., which are inconsistent or in
conflict with the terms of this warranty, shall not be binding upon Radyne Corp. unless reduced to writing
and approved by an officer of Radyne Corp.
Warranty Repair Return Procedure
Before a warranty repair can be accomplished, a Repair Authorization must be received. It is at this time
that Radyne Corp. will authorize the product or part to be returned to the Radyne Corp. facility or if field
repair will be accomplished. The Repair Authorization may be requested in writing or by calling:
Radyne Corporation
3138 E. Elwood St.
Phoenix, Arizona 85034 (USA)
ATTN: Customer Support
Phone: [phone]
Fax: [phone]
Any product returned to Radyne Corp. for examination must be sent prepaid via the means of transportation
indicated as acceptable to Radyne Corp. 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 Corp. permission to open
and disassemble the product as required for evaluation. In all cases, Radyne Corp. has sole responsibility
for determining the cause and nature of failure, and Radyne Corp.’s determination with regard thereto shall
be final.

OM20 Universal Outdoor Modem Preface
TM116 – Rev. 1.2 v
Preface P
This manual provides installation and operation information for the Radyne OM20 (Outdoor
Modem). This is a technical document intended for use by engineers, technicians, and operators
responsible for the operation and maintenance of the OM20 Universal Outdoor Modem.
Conventions
Whenever the information within this manual instructs the operator to click a gel-tab or dropdown
menu on the GUI interface, the tab or dropdown label will be shown enclosed in "less than" (<)
and "greater than" (>) brackets. For example, the Reset Alarms 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.

OM20 Universal Outdoor Modem Preface
TM116 – Rev. 1.2 vi
Trademarks
Product names mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereby acknowledged.
Copyright
©2008, Radyne Corporation. This manual is proprietary to Radyne Corp. and is intended for the
exclusive use of Radyne Corp.’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 Corp.
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 Corp. assumes no responsibility for use of any
circuitry other than the circuitry employed in Radyne Corp. systems and equipment. Furthermore,
since Radyne Corp. 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 6-29-06 Initial Release
1.1 4-07-08 Updated charts and revisions.
1.2 7-22-08 Changes for Output power, and web browser configuration
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 Corp. Customer Service Department.

OM20 Universal Outdoor Modem Table of Contents
TM116 – Rev. 1.2 vii
Table of Contents ToC
Section 1 - Introduction ............................................................................................................. 1-1
1.0 Overview ........................................................................................................................1-1
1.1 OM20 Configurations.....................................................................................................1-2
1.1.1 Features/Options Installed at Time of Order..................................................................1-3
1.1.2 Software Feature Upgrades..........................................................................................1-3
1.1.3 Future Hardware Options..............................................................................................1-3
Section 2 -Installation ................................................................................................................ 2-1
2.0 Installation Requirements...............................................................................................2-1
2.1 Unpacking ......................................................................................................................2-2
2.1.1 Outdoor Modem (OM20)................................................................................................2-2
2.2 Removal and Assembly .................................................................................................2-3
2.3 Mounting and Wiring Considerations.............................................................................2-4
2.3.1 OM20 Mounting Bracket Instructions............................................................................2-5
2.3.2 OM20 General Antenna Post Mount Diagram............................................................... 2-6
2.3.3 OM20 General Antenna Post Mount Diagram............................................................... 2-6
2.3.4 OM20 Antenna Feed Arm Mount Diagram ....................................................................2-7
2.3.5 OM20 with External TWTA Amplifier .............................................................................2-7
2.3.6 OM20 Additional Interface Diagrams.............................................................................2-8
Section 3 - OM20 Initial Configuration ..................................................................................... 3-1
3.0 OM20 Initial Configuration Check.................................................................................. 3-1
3.1 Initial Configuration and Setup Process.........................................................................3-3
3.1.1 Initial Power-Up and Configuration Verification.............................................................3-3
3.1.2 M&C Setup (IP Configuration & RS232 Interface)........................................................3-3
3.2 OM20 Verification Testing..............................................................................................3-4
3.2.1 TX Output Verification Test........................................................................................... 3-4
3.2.2 RX Input Verification Test..............................................................................................3-4
3.3 Storage and Reshipment..................................................................................................3-5

OM20 Universal Outdoor Modem Table of Contents
TM116 – Rev. 1.2 viii
Section 4 - OM20 Initial Configuration ..................................................................................... 4-1
4.0 OM20 Hardware...............................................................................................................4-1
4.0.1 OM20 L-Band Printed Circuit Card ...............................................................................4-2
4.0.2 OM20 Baseband Processing Printed Circuit Card........................................................ 4-3
4.1 OM20 Functional Block Diagram .....................................................................................4-4
4.1.1 Baseband Processing ...................................................................................................4-4
4.1.2 Tx Baseband Processing ..............................................................................................4-5
4.1.3 Rx Baseband Processing..............................................................................................4-5
4.2 Monitor & Control (M&C) Subsystem...............................................................................4-6
4.2.1 Terminal Port.................................................................................................................4-7
4.2.2 Modem Remote Communications (RLLP) ....................................................................4-7
4.2.3 Ethernet M&C Port........................................................................................................4-7
4.2.4 Modem Monitor Status.................................................................................................. 4-7
4.3 Async Port / ES-ES Communications ..............................................................................4-8
4.4 Internal Clock ...................................................................................................................4-8
4.5 Loopback Features (Terrestrial & IF)...............................................................................4-8
4.6 Clocking Options............................................................................................................4-12
4.6.1 TX Clock Options ........................................................................................................4-12
4.6.1.1 SCTE: Serial Clock Transmit External.....................................................................4-13
4.6.1.2 SCT: Serial Clock Transmit......................................................................................4-13
4.6.2 RX Buffer Clock Options .............................................................................................4-13
4.6.2.1 RX SAT Clock ..........................................................................................................4-14
4.6.2.2 SCTE: Serial Clock Transmit External.....................................................................4-14
4.6.2.3 SCT: Serial Clock Transmit......................................................................................4-14
4.6.2.4 EXT CLK/EXT BNC:.................................................................................................4-14
4.6.2.5 EXT IDI: Insert Data In.............................................................................................4-14
4.6.3 EXT REF: External Reference, Optional.....................................................................4-14
4.7 RS422/V.35 Interface J3 (Standard option)...................................................................4-15
4.7.1 G.703 Interface (Optional)...........................................................................................4-15
4.7.2 Ethernet Data Interface J4 (Optional) .........................................................................4-15
4.8 Reed-Solomon Codec....................................................................................................4-15
4.8.1 Reed-Solomon Operation in the OM20.......................................................................4-15
4.8.2 Reed-Solomon Code Rate..........................................................................................4-16
4.8.3 Interleaving..................................................................................................................4-16
4.9 Drop and Insert (D&I).....................................................................................................4-17
4.10 OM20 Automatic Uplink Power Control (AUPC Operation).........................................4-17
4.11 Asynchronous Overhead Operation J3 (Framing/Multiplexer Capability)....................4-17

OM20 Universal Outdoor Modem Table of Contents
TM116 – Rev. 1.2 ix
4.12 Standard IBS Mode......................................................................................................4-19
4.13 Asynchronous Multiplexer Mode..................................................................................4-19
4.14 ESC Backward Alarms..................................................................................................4-20
4.14.1 To Disable the ESC Backward Alarms......................................................................4-21
4.15 Satellite Control Channel (SCC) ..................................................................................4-21
4.15.1 SCC Framing Structure.............................................................................................4-21
4.15.2 Aggregate Data Rate.................................................................................................4-22
4.15.3 Overhead Rate Comparison .....................................................................................4-23
4.15.4 Actual Overhead Rate Calculation............................................................................4-23
4.15.5 SCC Overhead Channel Setup.................................................................................4-24
4.16 EDMAC Satellite Framing/Deframing Mode.................................................................4-26
4.17 Locating the ID Code Operational Procedure..............................................................4-26
4.18 Strap Code ...................................................................................................................4-26
Section 5 - Rear Panel Interfaces.............................................................................................. 5-1
5.0 OM20 External Interface Connections........................................................................... 5-1
5.0.1 Power Input...................................................................................................................5-3
5.0.1.1 AC Power Input (J1)...................................................................................................5-3
5.0.1.2 DC Power Input/Switch (Optional) .............................................................................5-3
5.0.2 Remote/Terminal/Fault Port (J2)...................................................................................5-3
5.0.3 EIA-530 Synchronous Data, ES-ES Asynchronous Overhead Data and
G.703 Balanced Data I/O Port (J3)................................................................................5-5
5.0.4 ETHERNET DATA/M&C (J4)........................................................................................5-6
5.0.5 Ground Lug (J6)............................................................................................................5-7
5.0.6 RX L-Band IF (J7) .........................................................................................................5-7
5.0.7 TX L-Band IF (J8)..........................................................................................................5-7
5.0.8 Compact Flash Card (J9)..............................................................................................5-7
5.0.9 SD (J10) (Optional) .......................................................................................................5-7
5.0.10 RD (J11) (Optional).....................................................................................................5-7
5.0.11 LED Indicators.............................................................................................................5-8
5.0.12 G.703 Balanced...........................................................................................................5-8
5.0.13 EXT Reference J12)....................................................................................................5-8
Section 6 - Web Browser/Remote Protocol ............................................................................. 6-1
6.0 Web Browser User Interface............................................................................................6-1
6.1 Configuring Your PC ........................................................................................................6-1
6.1.1 Appearance...................................................................................................................6-1
6.1.2 Navigation .....................................................................................................................6-2

OM20 Universal Outdoor Modem Table of Contents
TM116 – Rev. 1.2 x
6.1.3 LED Indicators...............................................................................................................6-3
6.2 Gui Screen Menus............................................................................................................6-4
6.2.1 Introduction Menu..........................................................................................................6-5
6.2.1.1 Login Screen..............................................................................................................6-6
6.2.2 Password Setup............................................................................................................6-7
6.2.3 IP and Application Administration .................................................................................6-9
6.2.4 Monitor and Control Menu...........................................................................................6-15
6.2.4.1 Transmit Menu .........................................................................................................6-15
6.2.4.2 Receive Menu ..........................................................................................................6-28
6.2.4.3 Interface Menu .........................................................................................................6-36
6.2.4.4 Monitor Menu ...........................................................................................................6-43
6.2.4.5 Alarms Menu............................................................................................................6-48
6.2.4.6 System Menu ...........................................................................................................6-55
6.2.4.7 Test Menu ................................................................................................................6-58
6.3 Configuring the OM20 to use the Ethernet Data Interface (Optional)............................6-60
6.3.1 Ethernet Flow Control..................................................................................................6-60
6.3.1.1 Half-Duplex Flow Control .........................................................................................6-60
6.3.1.2 Full-Duplex Flow Control..........................................................................................6-60
6.3.2 Packet Statistics..........................................................................................................6-61
6.4 Terminal Mode Control...................................................................................................6-62
6.4.1 Modem Terminal Mode Control...................................................................................6-62
6.5 Modem Remote Communications..................................................................................6-63
6.5.1 Host Computer Remote Communications...................................................................6-63
Section 7 - Maintenance and Troubleshooting........................................................................ 7-1
7.0 Periodic Maintenance.......................................................................................................7-1
7.0.1 Clock Adjustment ..........................................................................................................7-1
7.1 Troubleshooting................................................................................................................7-1
7.1.1 Alarm Faults..................................................................................................................7-2
7.1.1.1 Major Tx Alarms.........................................................................................................7-2
7.1.1.2 Major Rx Alarms.........................................................................................................7-3
7.1.1.3 Minor Tx Alarms.........................................................................................................7-3
7.1.1.4 Minor Rx Alarms.........................................................................................................7-4
7.1.1.5 Drop and Insert Alarms ..............................................................................................7-5
7.1.1.6 Common Major Alarms...............................................................................................7-5
7.1.2 Alarm Masks..................................................................................................................7-6
7.1.2.1 Active Alarms .............................................................................................................7-6
7.1.2.1.1 Major Alarms...........................................................................................................7-6

OM20 Universal Outdoor Modem Table of Contents
TM116 – Rev. 1.2 xi
7.1.2.1.2 Minor Alarms...........................................................................................................7-6
7.1.2.1.3 Common Equipment Faults.....................................................................................7-6
7.1.2.2 Latched Alarms ..........................................................................................................7-6
Section 8 - Technical Specifications ........................................................................................ 8-1
8.0 Data Rates.....................................................................................................................8-1
8.1 Modulator .......................................................................................................................8-1
8.2 Demodulator...................................................................................................................8-2
8.3 Plesiochronous Buffer....................................................................................................8-2
8.4 Monitor and Control........................................................................................................ 8-2
8.5 OM20 Drop and Insert (Optional)...................................................................................8-2
8.6 Terrestrial Interfaces...................................................................................................... 8-3
8.7 IDR/ESC Interface (Optional).........................................................................................8-3
8.8 Ethernet Data Interface.................................................................................................. 8-3
8.9 Environmental................................................................................................................8-3
8.10 Physical..........................................................................................................................8-3
8.11 OM20 Data Rate Limits.................................................................................................. 8-3
8.11.1 Non-DVB .....................................................................................................................8-3
8.11.2 DVB.............................................................................................................................8-5
8.12 OM20 / BER Specifications............................................................................................8-7
8.12.1 BER Performance (Viterbi)..........................................................................................8-7
8.12.2 BER Performance (Sequential)...................................................................................8-8
8.12.3 BER Performance (Viterbi with Reed-Solomon)......................................................... 8-9
8.12.4 BER Performance (8PSK Trellis)..............................................................................8-10
8.12.5 BER Performance (16QAM Viterbi) ..........................................................................8-11
8.12.6 BER Performance (16QAM Viterbi with Reed-Solomon)..........................................8-12
8.12.7 BER Performance ((O)QPSK Turbo)........................................................................8-13
8.12.8 BER Performance (8PSK Turbo) ..............................................................................8-14
8.12.19 BER Performance (16QAM Turbo).........................................................................8-15
8.12.10 Input Level...............................................................................................................8-19
Appendix A - Product Options ..................................................................................................A-1
A.0 Hardware Options..........................................................................................................A-1
A.0.1 G.703/IDR ESC Interface..............................................................................................A-1
A.0.2 Turbo Card....................................................................................................................A-1
A.0.3 Internal High Stability....................................................................................................A-1
A.0.4 DC Input Prime Power..................................................................................................A-1
A.0.5 Ethernet Data Interface.................................................................................................A-1

OM20 Universal Outdoor Modem Table of Contents
TM116 – Rev. 1.2 xii
A.0.6 Sequential Interface......................................................................................................A-1
A.1 Customized Options.......................................................................................................A-2
Appendix B - Software Upgrade Procedure.............................................................................B-1
B.0 Terminal Software Upgrade...........................................................................................B-1
B.1 Required Equipment ......................................................................................................B-1
B.2 Upgrade Procedure........................................................................................................B-1
B.3 Demonstration Procedure..............................................................................................B-2
B.4 Canceling Demonstration Mode.....................................................................................B-3
B.5 Web Browser Software Upgrade ...................................................................................B-4
B.6 Monitor and Control........................................................................................................B-4
Appendix C -Carrier Control......................................................................................................C-1
C.0 States.............................................................................................................................C-1
C.1 Carrier Off ......................................................................................................................C-1
C.2 Carrier On ......................................................................................................................C-1
C.3 Carrier Auto....................................................................................................................C-1
C.4 Carrier VSat ...................................................................................................................C-1
C.5 Carrier RTS....................................................................................................................C-2
Appendix D - Quick Start Guide................................................................................................D-1
D.0 Introduction ....................................................................................................................D-1
D.1 Required Items...............................................................................................................D-1
D.2 Web Interface Setup Guidelines....................................................................................D-1
D.2.1 Preparing the OM-20 for Web Setup ............................................................................D-1
D.3. IP Network Change from the Initial Web Setup .............................................................D-4
D.3.1 Configuring the modem ................................................................................................D-4
D.3.2 Configuring the Computer ............................................................................................D-5
D.4 WEB Users Setup and Configurations Controls Options...............................................D-6
D.4.1 Change Authentication Password ................................................................................D-7
D.4.2 Boot Mode Options (Reference only)...........................................................................D-8
Appendix E - Efficient Drop & Insert.........................................................................................E-1
E.0. Drop and Insert (D&I)......................................................................................................E-1
E.1 Drop Only.........................................................................................................................E-1
E.2 Insert Only........................................................................................................................E-2
E.3 Mode Selection................................................................................................................E-3
E.3.1 PCM-30.........................................................................................................................E-3
E.3.2 PCM-30C ......................................................................................................................E-3

OM20 Universal Outdoor Modem Table of Contents
TM116 – Rev. 1.2 xiii
E.3.3 PCM-31.........................................................................................................................E-3
E.3.4 PCM-31C ......................................................................................................................E-3
E.3.5 T1-D4/T1-D4-S .............................................................................................................E-3
E.3.6 T1-ESF/T1-ESF-S.........................................................................................................E-4
E.4 Multidestinational Systems ..............................................................................................E-4
E.5 Drop and Insert Mapping .................................................................................................E-5
E.6 Configuring the OM20 for Drop and Insert.......................................................................E-7
E.6.1 Data Rate......................................................................................................................E-7
E.6.2 Operational Network Specification................................................................................E-9
E.6.3 Terrestrial Framing - Drop Mode/Insert Mode ..............................................................E-9
E.6.3.1 Insert Terrestrial Frame Source.................................................................................E-9
E.6.4 D&I Sample Configurations and D&I Clock Setup Options ........................................E-10
E.7 D&I Maps and Map Editing............................................................................................E-12
Appendix F - Efficient Drop & Insert......................................................................................... F-1
F.0 Introduction ....................................................................................................................F-1
F.1 Prerequisite....................................................................................................................F-1
F.2 Efficient Drop & Insert....................................................................................................F-2
F.2.1 Calculating the Required Satellite Bandwidth...............................................................F-3
F.2.2 Calculating the Basic Efficient D&I Rate.......................................................................F-3
F.2.3 Calculating the Efficient D&I Rate with E1 Signaling....................................................F-3
F.2.4 Calculating the Efficient D&I Rate with Enhanced Asychronous Overhead.................F-3
Appendix G - Strap Codes ........................................................................................................G-1
G.0 Strap Codes.................................................................................................................... G-1
G.1 Sample Applications....................................................................................................... G-4
G.1.1 Operational Case Examples........................................................................................ G-5
Appendix H - AUPC Operation ..................................................................................................H-1
H.0 Automatic Uplink Power Control (AUPC Operation) .......................................................H-1
H.0.1 Radyne AUPC ..............................................................................................................H-1
H.0.2 EF AUPC ......................................................................................................................H-2
H.0.3 Near Side AUPC...........................................................................................................H-2
Glossary ....................................................................................................................................... I-1

OM20 Universal Outdoor Modem Table of Contents
TM116 – Rev. 1.2 xiv

OM20 Universal Outdoor Modem Introduction
TM116 – Rev. 1.2 1-1
Introduction 1
This chapter provides an overview of the OM20 Outdoor Modem. The OM20 system can support
a C-Band with power levels of 2, 5 and 10 watts or Ku-Band with output powers of 2, 4 and 8
watts.
Figure 1.1. Outdoor Modem (OM20) without protective shroud
1.0 Overview
Radyne’s OM20 outdoor modem is based on Radyne’s DMD20/LBST modem product platform.
The Transmit IF output and Receive IF input frequencies of the OM20 are 950 to 2050 MHz. The
modem operates over a data rate range of 2.4 Kbps to 20 Mbps in 1 bps steps including at all
standard IBS and IDR Data rates up to 8.448 Mbps. A full range of Industry Standard Data
Interfaces is available for the OM20. Interface types are selectable from EIA-530 (J3), Ethernet
(J4), optional ITU G.703 (Unbalanced on J10/11, Balanced on J3), and an optional ASI (J10/11).
The OM20 is available with optional feed mounted C or Ku-Band LNB’s for the downlink, and
optional feed mounted 2/4/8 Watt Ku-Band or 5/10 Watt C-Band BUC’s for the uplink.
The OM20 supplies DC voltage and 10 MHz reference to the BUC and LNB via the IF Cables.
The output from the TX Port (J8) consists of the L-Band output frequency, high-stability 10 MHz
reference, and an optional 24 or 48 Volts to the BUC. The RX Port I/O (J7) consists of the L-
Band input frequency (from the LNB), high-stability 10 MHz reference and 13, 15, 18, and 21
volts. The OM20 has the capability to enable and disable the BUC/LNB voltages and 10 MHz
reference.

OM20 Universal Outdoor Modem Introduction
TM116 – Rev. 1.2 1-2
In addition, monitoring features provide verification of BUC and LNB status. The OM20 monitors
both the current and the voltage at the output of the TX and RX Ports, thus allowing the user to
monitor the operating status of BUC and LNB.
Redundancy for the OM20 is supported by the OMS11, Outdoor Modem Switch. OMS11 offers
redundancy for Data and supplies power for switching TX and RX Waveguide switches. For
additional information, refer to TM133 OMS11 Operational Manual.
Radyne’s OM20 Ethernet Graphical User Interface (GUI) offers browser based control of the
OM20, BUC, and LNB with numerous user-friendly GUI programmable functions (see Figure 1-2).
The OM20 GUI provides selectable functions for different services: Intelsat IDR and IBS, as well
as closed networks. All of the configuration and Monitor and Control (M&C) functions are
available using the GUI (Ethernet J4) or is also available using the conventional RS-232/485
terminal port (J2). Operating parameters, such as variable data rates, FEC Code Rate,
modulation type, IF Frequencies, IBS/IDR Framing, and interface type can be readily set and
changed by earth station operations personnel, using either the GUI or terminal interfaces.
Figure 1-2. OM20 Outdoor Modem Upper GUI Screen
1.1 OM20 Configurations
The OM20 can be configured in the following different ways:
Features and options are installed as specified when the unit is ordered from the
factory,
Optional software feature upgrades in the future while deployed in the field,
Future hardware options can be installed to a unit that is sent back to a Radyne
facility.

OM20 Universal Outdoor Modem Introduction
TM116 – Rev. 1.2 1-3
1.1.1 Features/Options Installed at Time of Order
Features installed at the time of ordering are the options pre-installed/initialized in the factory prior
to shipment. Features and options can be reviewed from the GUI or remote port of the OM20.
Refer to Section 4, “User Interfaces” for information on how to view these features. Factory
installed options are chassis and board configurations that are introduced during manufacture.
These options include (Options are subject to change):
Input Power: AC 2-5 W BUC (24VDC), AC 8-10W BUC (48 VDC),
Input Power: DC 2-5 W BUC (24VDC), DC 8-10W BUC (48 VDC)
Data Rate: 5 Mbps (standard), optional 10, 20 Mbps
Interface: EIA-530 (standard), Optional Ethernet, G.703, ASI
M&C Interface – SNMP Ethernet/Web Browser – RS485, RS232
Viterbi Codec (standard), Optional Sequential Codec
Optional Custom Reed Solomon
Optional IBS, IDR, Drop and Insert
Optional External Reference Input Connector
Modulation: BPSK, QPSK, OQPSK (standard), Optional 8PSK, 16 QAM
Optional Turbo, 5Mbps, 20Mbps
Sequential Codec, and custom programmable Reed Solomon.
Optional OM73
Optional DVB
Optional Cable, Waveguide, Mounting Kits
M&C Interface – SNMP, Ethernet/Web Browser, RS485, RS232
1.1.2 Software Feature Upgrades
Software Feature Upgrades are a simple and quick way of changing the feature set of an installed
modem. Feature upgrades are how most OM20 options are implemented. Features may be
purchased at any time by contacting a Radyne Corp. salesperson. Refer to Appendix B for
information on how upgrade features.
1.1.3 Future Hardware Options
Hardware options (Refer to Appendix A) are purchased parts that can only be installed at a
Radyne Facility. Please contact the Radyne Corp. Customer Service Department for information
not limited to availability and to shipping costs.
Only authorized service personnel should handle and install optional
hardware options.

OM20 Universal Outdoor Modem Introduction
TM116 – Rev. 1.2 1-4

OM20 Universal Outdoor Modem Installation
TM116 – Rev. 1.2 2-1
Installation 2
This document provides unpacking and installation instructions, and a description of external
connections.
2.0 Installation Requirements
The OM20 is designed to be easily installed on antenna offset feed struts or king posts. It
requires standard uni-strut type hardware (or comparable) and 3/8-16 bolts. Standard mounting
brackets and hardware are included with the OM20. Optional Transmit and Receive coaxial
cable or waveguide can be provided from the factory if requested and specified. If installing the
OMS11 redundancy switch with the OM20, refer to the operational manual, TM133 Outdoor
Modem Switch for mounting requirements. Mating Connectors for Power (J1), Remote
RS232/485/Fault (J2), EIA-530/G703 Balanced data (J3), and Ethernet (J4) interface connections
are supplied standard with the unit. Use of an extended temperature CAT-5 cable such as
Belden 7923A is recommended for the Ethernet Data/M&C interface.
There are no user-serviceable parts or configuration settings located
inside the OM20 Chassis. There is a potential shock hazard internally at
the power supply modules. DO NOT open the OM20 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 and
terminate it into an applicable load. This is especially true if the current
OM20 configuration settings are unknown, where incorrect settings could
disrupt existing communications traffic.

OM20 Universal Outdoor Modem Installation
TM116 – Rev. 1.2 2-2
The OM20 contains a Lithium Battery. DANGER OF EXPLOSION exists if
the battery is incorrectly replaced. Replace only with the same or
equivalent type recommended by the manufacturer. Dispose of used
batteries in accordance with local and national regulations.
2.1 Unpacking
2.1.1 Outdoor Modem (OM20)
The OM20 Universal Outdoor Modem is carefully packaged at the factory to avoid damage and
should arrive complete with the following items for proper installation:
OM20 Universal Outdoor Modem
Power Mating connector (J1)
Mating Ethernet connector (J4)
Mating connectors for 18 pin (J2 M&C)
38 pin (J3 EIA-530) connectors
Installation Brackets
OM20 Manual on CD
Default Plug (J2)
Figure 2.1. OM20 with protective shroud

OM20 Universal Outdoor Modem Installation
TM116 – Rev. 1.2 2-3
2.2 Removal and Assembly
The Standard OM20 is shipped in a single box that contains mating connectors. Carefully unpack
the unit and ensure that all of the above items are in the carton. The standard OM20 power
supply is designed for universal AC (95-250VAC, 50/60 Hz) application and is capable of
supplying DC power to the BUC and LNB. See the specification section of this document for
appropriate voltages and currents. Optionally, a -48VDC power supply may be specified for the
unit.
Always ensure that power is removed from the OM20 before removing or
installing the BUC or LNB. Failure to do so may cause damage to the
equipment.
Figure 2.2. OM 20 Front Interconnects