Comtech EF Data OMS11 User Manual

OMS11

Outdoor Modem Switch

Installation and Operation Manual

TM133

Revision 1.1

Comtech EF Data • 2114 W 7th St. • Tempe, AZ 85281 • [phone] • Fax: [phone] • www.comtechefdata.com

OMS11 1:1 Redundancy Switch Warranty Policy

Warranty Policy

WP

Comtech EF Data products are warranted against defects in material and workmanship for a period of two
years from the date of shipment. During the warranty period, Comtech EF Data will, at its option, repair or
replace products that prove to be defective.

For equipment under warranty, the owner is responsible for freight to Comtech E F 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 ow ner. Comt ech EF Data will return the equipment by the same
method (i.e., Air, Express, Surface) as the equipment was sent to Comtech EF D ata.

All equipment returned for warranty repair must have a valid RMA number issued prior to return and be
marked clearly on the return p ack agin g. 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.
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 Corpora t io n for incide ntal or con sequent i al

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.

TM133 – Rev. 1.1 iii

Warranty Policy OMS11 1:1 Redundancy Switch

Warranty Repair Return Procedure

Before a warranty repair can be accomplished, a Repair Authorization must be received. It is at this time
that Comtech EF Data will authorize the product or part to be returned to the Comtech EF Data facility or if
field repair will be accomplished. The Repair Authorization may be requested in writing or by calling:

Comtech EF Data Corporation

2114 W 7

th

Street.
Tempe, Arizona 85281 (USA)
ATTN: Customer Support
Phone: [phone]
Fax: [phone]

Any product returned to Comtech EF Data for examination must be sent prepaid via the means of
transportation indicated as acceptable to Comtech EF Data. 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 Comtech EF Data permission to
open and disassemble the product as required for evaluation. In all cases, Comtech EF Data has sole
responsibility for determining the cause and nature of failure, and Comtech EF Data’s determination with
regard thereto shall be final.

iv TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Preface

Preface

P

This manual provides installation and operation information for the Radyne OMS11 1:1
Redundancy Switch. This is a technical document intended for use by engineers, technicians,
and operators responsible for the operation and maintenance of the OMS11.

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 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.

TM133 – Rev. 1.1 v

Preface OMS11 1:1 Redundancy Switch

Revision

Level

1.0

11-30-07

Initial Release

1.1

2-08-08

Updates. Added Fault Detection

A note icon identifies information for the proper operation of your equipment, including helpful
hints, shortcuts, or important reminders.

Trademarks

Product names mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereb y acknowledged.

Copyright

2008, Comtech EF Data This manual is proprietary to Comtech EF Data and is intended for the
exclusive use of Comtech EF Data’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 Comtech EF
Data

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 t o be, represe nt at ions or war ranti es
concerning the products described. Comtech EF Data assumes no responsibility for use of any
circuitry other than the circuitry employed in Comtech EF Data systems and equipment.
Furthermore, since Comtech EF Data 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

Date

Reason for Change

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 Comtech EF Data Corporation Customer Service
Department.

vi TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Preface

TM133 – Rev. 1.1 vii

OMS11 1:1 Redundancy Switch Table of Contents

1

Table of Contents

ToC

Section 1 - Introduction ............................................................................................................. 1-1

1.0 Description ............................................................................................................................. 1-1

1.1 Redundant Power Supplies ................................................................................................... 1-1

1.2 Front Panel Controls .............................................................................................................. 1-2

1.3 Power-Up Defaults ................................................................................................................. 1-2

Section 2 - Theory of Operation ................................................................................................ 2-1

2.0 Theory of Operation ............................................................................................................... 2-1

2.1 OMS11 Operation .................................................................................................................. 2-1

2.1.1 Operating Procedures ........................................................................................................ 2-2

2.1.2 Configuring the OMS11 ...................................................................................................... 2-2

2.1.3 Front Panel Controls ........................................................................................................... 2-2

2.1.4 Manual Mode ...................................................................................................................... 2-2

2.1.5 Auto Mode .......................................................................................................................... 2-2

2.1.6 Power-Up Defaults ............................................................................................................. 2-2

2.2 OMS11 Major Assemblies ..................................................................................................... 2-3

2.2.1 Main Switch Board .............................................................................................................. 2-3

2.2.2 Front Panel ......................................................................................................................... 2-3

2.2.3 Redundant Power Supplies ................................................................................................ 2-3

2.3 OMS11 General Operation .................................................................................................... 2-3

2.3.1 Signals ................................................................................................................................ 2-3

2.3.2 Backup ................................................................................................................................ 2-3

2.3.3 Fail-Safe ............................................................................................................................. 2-3

2.3.4 OMS11 Fault Relays .......................................................................................................... 2-4

2.4 Fault Detection ...................................................................................................................... 2-4

Section 3 - User Interfaces ........................................................................................................ 3-1

3.0 User Interfaces ...................................................................................................................... 3-1

3.1 Front Panel Interface ............................................................................................................. 3-1

TM133 – Rev. 1.1

Introduction OMS11 1:1 Redundancy Switch

2

Section 4 - Installation ............................................................................................................... 4-1

4.0 Installation Requirements ...................................................................................................... 4-1

4.1 Unpacking .............................................................................................................................. 4-1

4.1.1 Test Data Sheet .................................................................................................................. 4-2

4.2 Site Considerations ............................................................................................................... 4-2

4.2.1 Power Sources ................................................................................................................... 4-2

4.3 System Setup & Connections ................................................................................................ 4-3

Section 5 - Connector Pinouts .................................................................................................. 5-1

5.0 OMS11 External Interface Connections ................................................................................ 5-1

5.1 LED Indicators ....................................................................................................................... 5-2

5.2 Power Input............................................................................................................................ 5-2

5.2.2 AC Power Input (J 6, J 10) ................................................................................................... 5-2

5.2.3 DC Power Input (J6, J10) (Optional) .................................................................................. 5-2

5.3 Ground Lug ............................................................................................................................ 5-3

5.4 Remote Monitor & Control (J8) .............................................................................................. 5-3

5.4.1 Terminal Mode (RS232) ..................................................................................................... 5-3

5.4.2 Modem Remote Communications (RLLP/RS485).............................................................. 5-4

5.4.3 Common Equipment Faults (J8) ......................................................................................... 5-4

5.4.3.1 Fault Detection ................................................................................................................ 5-5

5.5 Terrestrial Data Interface (J7) - RS422 Sync, Async Overhead, G.703 Balanced I/O Port .. 5-7

5.6 Modem A Data Interface (J1) - RS422 Sync, Async Overhead, G.703 Balanced I/O Port ... 5-9

5.7 Modem B Data Interface (J13) - RS422 Sync,Async Overhead,G.703 Balanced I/O Port . 5-11

5.8 Modem A Remote/Terminal/Fault Port on OMS11 (J2) ...................................................... 5-13

5.9 Modem A Remote/Terminal/Fault Port on OMS11 (J14) .................................................... 5-14

5.10 TX &RX Waveguide Switch Interface (J5 & J9) ................................................................ 5-14

5.11 Mating Connectors ............................................................................................................ 5-16

Section 6 - Maintenance and Troubleshooting ........................................................................ 6-1

6.0 Basic Troubleshootin g and Mai nte nanc e .............................................................................. 6-1

6.1 Basic User Checks ................................................................................................................ 6-1

6.1.1 Checking the Cabling and Connectors ............................................................................... 6-1

6.2 Major and Minor Faults .......................................................................................................... 6-1

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Table of Contents

3

Section 7 - Technical Specifications ........................................................................................ 7-1

7.0 Introduction ............................................................................................................................ 7-1

7.1 General .................................................................................................................................. 7-1

7.2 Monitor and Control ............................................................................................................... 7-1

7.3 Terrestrial Interfaces .............................................................................................................. 7-1

7.4 Modem Data Cables .............................................................................................................. 7-1

7.5 Front Panel LED Indicators ................................................................................................... 7-1

7.6 Front Panel Controls .............................................................................................................. 7-2

7.7 Power and Environmental ..................................................................................................... 7-2

7.8 Physical ................................................................................................................................. 7-2

Appendix A - OMS11 DIP Switch Configuration ...................................................................... A-1

Appendix B - OMS11 Remote Comunications ......................................................................... B-1

B.0 Host Computer Remote Communications ............................................................................ B-1

B.0.1 Protocol Structure .............................................................................................................. B-1

B.0.2 Protocol Wrapper ............................................................................................................... B-1

B.0.3 Frame Description and Bus Handshaking ......................................................................... B-3

B.0.4 Global Response Operational Codes ................................................................................. B-5

B.0.5 Software Compatibility ....................................................................................................... B-5

B.0.6 RLLP Summary .................................................................................................................. B-6

B.1 Remote Port Packet Structure .............................................................................................. B-6

Appendix C - Interconnecting Cable Drawings ....................................................................... C-1

Glossary ..................................................................................................................................... G-1

TM133 – Rev. 1.1

Introduction OMS11 1:1 Redundancy Switch

4

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Introduction

1-1

Introduction

1

1.0 Description

The Radyne OMS11 Outdoor Modem Switch provides redundancy protection for the OM20
Outdoor Modem, BUC and LNB. The OMS11 offers redundancy support for OM20 user data,
Asynchronous data, RS485 and BUC/LNB Waveguide Switching control. The OMS11
redundancy system is based on a Chain switching system that switches the IF/RF primary path to
the IF/RF Backup path. Optional BUCs, LNBs, Waveguide Switches and Mounting hardware are
optional items that can be supplied with the system. Contact Radyne for supported hardware
options. Refer to Figure 1-1 for an illustration of the OMS11 1:1 Redundancy Switch Front Panel
and Figure 1-3 of an OMS11 Functional Block Diagram.

Operating in the Automatic Mode, the OMS11 immediately places a Backup Modem and IF/RF
Path online in the event of a Primary Modem/IF/RF path fails. The OMS11 chain switches the
modem, BUC and LNB. In the Manual Mode, the user may designate the selected Online
Primary Modem from either the Interactive Front Panel or a remote Terminal Interface. The
backup functions of the OMS11 may be performed manually via the front panel or the RS485,
RLLP remote protocol or the RS232 Terminal port.

Figure 1-1 OMS11 1:1 Redundancy Switch Front Panel

1.1 Redundant Power Supplies

The OMS11 is equipped with two fully redundant internal power supplies. Each power supply is
independent of the other, including their source of AC or DC input source. The OMS11 remains
fully operational as long as either power supply is providing a source of power. The power
supplies are internal to the OMS11 Chassis.

TM133 – Rev. 1.1

Introduction OMS11 1:1 Redundancy Switch

1-2

1.2 Front Panel Controls

The Front Panel of the OMS11 provides all of the necessary controls and LED indicators to
provide the operator with online status and backup status of the online and backup OM20
Modems.

1.3 Power-Up Defaults

During power-up, the OMS11 initializes itself to the last mode set by the Front Panel
Pushbuttons.

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Introduction

1-3

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Theory of Operation

2-1

Theory of Operation

2

2.0 Theory of Operation

The Radyne OMS11 Outdoor Modem Switch provides redundancy protection for the OM20
Outdoor Modem, BUC and LNB. The OMS11 redundancy system is based on a Chain switching
system that switches the IF/RF primary path to the IF/RF Backup path. The Chain Switching
system can includes BUCs, LNBs, Waveguide, Waveguides Switches, mounting hardware and
connecting cables. BUCs, LNBs, Waveguide Switches and Mounting hardware are optional
items that can be supplied with the system. Refer to Figure 1-1 for an illustration of the OMS11
1:1 Redundancy Switch Front Panel and Figure 2-1 for the OMS11 Functional Block Diagram.

The BUC and LNB switch over fault detection system is primarily done by the OM20 Modem.
When the OM20 is configured to supply power to the BUC and LNB, the modem uses internal
detection circuitry to monitor current and voltage status of the BUC and LNB. User must properly
set up the BUC/LNB voltage and current threshold limits on the OM20. Refer to the OM20 user
manual for proper set.

In cases where the BUCs are powered by an external power supply, fault detection can be
detected by the OM20 only if the BUC includes Normally Closed contact closures. In order to
support BUC redundancy, the BUC must have Normally Closed Contact closures available for the
OMS11/OM20 to support redundancy.

2.1 OMS11 Operation

A block diagram of the signal flow is shown in Figure 2-1 below.

Figure 2-1 Functional Block Diagram

TM133 – Rev. 1.1

Theory of Operation OMS11 1:1 Redundancy Switch

2-2

2.1.1 Operating Procedures

The OMS11 is designed to require minimal operator intervention and control during normal
operation. After initial setup, the unit should operate in a relatively ‘transparent’ manner,
providing trouble-free backup of the online Modems. The scope of this section is limited to
instruction on the various modes of control available to the operator. Refer to Section 3-1 for the
OMS11 Front Panel Controls and Indicators and Table 2-1 for a description of the Controls and
Indicators.

2.1.2 Configuring the OMS11

The redundancy switch must be properly configured prior to operation. Date interface type,
Remote communication type and remote baud rate must be set correctly to meet the users
needs. Configuring these options can only be done by removing the cover and accessing the dip
switches on the board. Appendix A of this manual gives specific information about the dip switch
settings for configuring the Terminal and Remote ports. If you need assistance with the settings,
contact Radyne customer service department.

2.1.3 Front Panel Controls (Refer to Figure 2-1)

The purpose of the ‘ENABLE’ pushbutton on the front panel is to reduce the risk of accidentally
changing the operating modes of the OMS11 by accidentally bumping any one of the front panel
pushbuttons. For any one of the front panel pushbuttons to function, the ‘ENABLE’ pushbutton
must be depressed simultaneously with the desired function pushbutton. Depress the ‘ENABLE’
pushbutton. This pushbutton must be depressed to allow the operator to proceed with any other
configurations. The ‘MANUAL’ LED should illuminate and the FAULT indicator may momentarily
flash. Under the MOD region of the front panel, depress ‘SELECT A’ to bring Modem ‘A’
modulator online. The green LED should illuminate. Under the DEMOD region of the front panel,
depress ‘SELECT A’ to bring modem ‘A’ demodulator online. The Green LED should illuminate.
The OMS11 should now be in backup mode with modem ‘A’ online.

2.1.4 Manual Mode

To manually select which Modem is to be placed online, simultaneously depress the ‘ENABLE’
pushbutton and the appropriate Modem ‘SELECT’ pushbutton. When a Modem select ion is
made, the OMS11 enters Manual Mode to carry out the selection, and will not respond to either
modem’s Modem Fault signals until placed back into Auto Mode.

2.1.5 Auto Mode

To enable automatic backup in the event of a Modem failure, the OMS11 must be placed into the
Auto Mode. First, select which Modem that will be active by following the ‘Manual Mode’
procedure in the previous paragrap h. To enter the Auto Mode, simultaneously depress the
‘ENABLE’ pushbutton and the ‘SELECT AUTO’ pushbutton. The OMS11 will then enter into Auto
Mode with the last selections made in Manual Mode. In the Auto Mode, the decision to switch
from one Modem to another is made automatically by monitoring the Fault signals from each
modem.

2.1.6 Power-Up Defaults

During power-Up, the OMS11 initiali ze s its elf to the last mode set by the operator on the front
panel pushbuttons.

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Theory of Operation

2-3

2.2 OMS11 Major Assemblies

The OMS11 Redundancy Control Unit contains the modules that control and monitor the
operation of the 1:1 Switch system. The 1:1 Switch is composed of the followin g major
assemblies and components:

Main Switch Board
Waveguide Switch Board
Front Panel
Dual (Redundant) Po wer Supplies

2.2.1 Main Switch Board

The Main Switch Board contains the OMS11 1:1 Switch Intelligenc e and Memory Circuitry and all
switching circuitry. The microprocessor controls and coordinates all of the major functions of the
Switch and performs all necessary calculations. The non-volatile system memory on the board
stores the switching parameter settings for each modem channel. Control and data signals are
routed to the appropriate devices in the system through various latches and transceivers that are
controlled by the microprocessor.

2.2.2 Front Panel

The Front Panel contains the LED Indicators and the pushbutton switches needed to control and
operate the OMS11. Refer to Figure 3.0 for a description of Front Panel Indicators.

2.2.3 Redundant Power Supplies

The 1:1 Switch comes equipped with two fully redundant internal power supplies (PS1 and PS2)
that supplies power to the switch and external switching components. Each supply is fully
independent of the other, including their source of AC/DC power and fusing. The Switch can
remain fully operational as long as it is supplied with a source of voltage from either power
supply.

2.3 OMS11 General Operation

2.3.1 Data Signals

Modem data signals are backed-up through a passive switching system. Signals that are
required to maintain the modem in off-line (hot-standby) are buffered by appropriate circuitry to
minimize loading on incoming signals.

2.3.2 Backup

If an online Modem fault is sensed, and the off-line Modem is in a non-faulted state, the OMS11
will switch to the Modem without the fault. The Fault Signal has a small debounce delay to
prevent false triggering. If the faulted Modem has its fault cleared, it stays off-line unless the
other MODEM has subsequently faulted.

2.3.3 Fail-Safe

If the OMS11 has a non-recoverable internal fault, the swit c h w il l revert back to Modem A, the
Switch Fault LED is illuminated, and the Switch Fault Relay switches to a faulted state.

TM133 – Rev. 1.1

Theory of Operation OMS11 1:1 Redundancy Switch

2-4

If Power Supply 1 and Power Supply 2 simultaneously fail, the switching circuitry in the OMS11
reverts back to Modem A, and the Switch Fault Relay switches to a faulted state. Modem B does
not receive buffered signals in this condition.

2.3.4 OMS11 Fault Relays

The OMS11 M&C Connector (J8) has Form-C contacts available that indicate modem online and
OMS11 Fault status. Refer to section for additional information.

2.4 Fault Detection

The OMS11 & OM20 work simultaneously to determine the status of all the componen ts within
this system. The OMS11 & OM20 are capable of monitoring BUC and LNB redundancy system.
Faults detection is established by the OM20 and forwarded to the OMS11. Fault detection for a
redundant BUC system will be different based on whether the BUC Power is supplied by the
OM20 or if the BUC Power is supplied by an external power source. If the BUC power is supplied
externally, then the BUC must have Normally Closed Form C Fault contacts so the OMS11/OM20
can monitor the BUC fault status.

Fault detection with the OM20 supplying power to BUC:

• BUC Faults - OM20 uses internal fault detection circuitry to determine BUC status and
initiates a fault that is forwarded to the OMS11

• OM20 uses internal fault detection circuitry to determine LNB status and initiate fault

Fault detection with BUC power supplied externally:

• BUC must have Normally Closed Form C contacts in order for BUC fault detection to

work

• OM20 data cable CAR5902 or CAR5918 has an external connector that is used to

connect and monitor Form C Contacts from the BUC.

• OM20 uses internal fault detection circuitry to determine LNB status and initiate fault

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Theory of Operation

2-5

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch User Interfaces

3-1

applied

Power Available

Power 2

Indicates PS2 has power
applied

LED illuminates Green for
Power Available

Fault

Indicates a Switch Fault
has occurred

LED illuminates Red for Switch
Fault

Auto (LED)

Indicates OMS11 is in the
Auto Mode

LED illuminates Green for Auto
Mode

the Manual Mode

Manual Mode

SELECT AUTO (Pushbutton)

-------------------

Allows the operator to select
Automatic Mode of operation

ENABLE (Pushbutton)

-------------------

Enables Front Panel controls to
function

User Interfaces

3

3.0 User Interfaces

These are:

 Front Panel Interface – Refer to Section 3.1.
 Remote Interface – Refer to Appendix B.

Figure 3-1 OMS11 Front Panel

3.1 Front Panel Interface

Table 3-1. OMS11 Front Panel Controls and Indicators

Nomenclature Description Function

Power 1 Indicates PS1 has power

Manual (LED) Indicates the OMS11 is in

LED illuminates Green for

LED illuminates Green for

TM133 – Rev. 1.1

User Interfaces OMS11 1:1 Redundancy Switch

3-2

SELECT Modem A

--------------------

Allows the operator to select

SELECT Modem B

--------------------

Allows the operator to select

Online LED

Indicates Modem A is

LED illuminates Green for Online

Fault LED

The OMS11 has received

LED illuminates Red for Fault

Online LED

Indicates Modem B is

LED illuminates Green for Online

Fault LED

The OMS11 has received

LED illuminates Red for Fault

(Pushbutton)

(Pushbutton)

Modem A

Modem B

Modem A Controls and Indicators

online

a fault from Modem A

Modem B Controls and Indicators

online

a fault from Modem B

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch User Interfaces

3-3

TM133 – Rev. 1.1

OMS11 1:1 Redundancy Switch Installation

4-1

Installation

4

4.0 Installation Requirements

The diagrams in this section display the OMS11 and OM20s mounted on the Antenna King Post
as shown in figure 4-1 an d 4-2. The cables supplied in the base system are based on this layout
utilizing the mounting kit supplied by Radyne.

There are no user-serviceable parts located inside the OMS11 Chassis.
There is a potential shock haz ard internally at the power supply module.
DO NOT open the OMS11 Chassis under any circumstance s.

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 curr ent OMS11 configuration settings are unknown,
where incorrect setting could disrupt existing communications traffic.

The OMS11 is shipped with protective covers over the connectors. The
protective covers are used to create a moisture tight seal. Protective
covers must remain on the unit if connector is not used.

4.1 Unpacking

The OMS11 was carefully packaged to avoid damage and should arrive complete with the
following items for proper installation:

TM133 – Rev. 1.1

Installation OMS11 1:1 Redundancy Switch

4-2

 OMS11 1:1 Redundancy Switch Unit
 Two AC or DC Mating connectors (J6 & J10)
 Data Mating Connector (J7)
 M&C Mating Connector (J8)
 OMS11/OM20 Interconnect Cables and Materials as required
 1:1 Switch System Test Data Sheet
 An Installation and Operation Manual
 C-Band or Ku Band Waveguide Switches (Optional)
 Antenna Mounting hardware (Optional)
 BUCS and LNBS (Optional)

4.1.1 Test Data Sheet

Each OMS11 1:1 Redundancy Switch system is shipped with a Test Data Sheet. This report
contains information on the results of the Switch quality control testing. The report also includes
information pertaining to the system settings that were made at the factory. Radyne recommends
that the user save this report for future reference.

4.2 Site Considerations

Adequate site planning and preparation simplifies the installation process and results in a more
reliable system. The user should ensure that the site has adequate electrical power,
environmental controls and protection against sources of electrical radiation and interference.

4.2.1 Power Sources

The power sources should be properly grounded and as free as possible from electrical
interference. The OMS11 employs a dual redundant power supply configuration. Each power
connection on the OMS11 must be plugged into its own separate power circuit. Each circuit must
have its own independent circuit breaker.

Grounding is achieved automatically when the properly terminated power connector is inserted
into the power receptacle. This should be checked by testing that there is no voltage present
between the chassis of the Switch and the power line ground.

The protective ground must not be bypassed or defeated In any way.
Defeating the ground may result in operator Injury or damage to the
system.

TM133 – Rev. 1.1