Tiernan DBR3000 Installation And Operation Manual
Installation and Operation Guide
For The
Tiernan DBR3000
Digital Broadcast Receiver
01-2002-401
Revision B
Overview
Page 1-2 Tiernan DBR3000
Warranty Policy
Warranty Policy
WP
Tiernan, A Radyne Company warrants that that its products will be free from defects in material and workmanship
at the time of shipment and that they will conform to applicable specifications. In no event will Tiernan, A Radyne
Company be liable for consequential misuse or damages.
The Tiernan product that you have purchased is warranted against any above-mentioned defects that appear
within two (2) years of the shipping date.
Products subject to abuse, improper installation or application, alteration, accident, or negligence in use, storage,
transportation, or handling are not covered under this warranty.
The Tiernan warranty, as stated herein, is in lieu of all other warranties, expressed, implied, or statutory.
How & Where to Ship
Packing the Unit
The original factory shipping carton and packing materials were specifically designed to protect Tiernan
equipment from excessive shock and vibrations. Please use the original shipping carton and packing materials to
ship your Tiernan equipment.
Shipping Addresses
For Domestic Shipments Within the United States:
Tiernan, A Radyne Company
Customer Service
7330 Trade Street
San Diego, CA 92121
RMA#
For International Shipments to the United States via Freight Forwarder:
Tiernan, A Radyne Company
c/o CJ& S Express
4901 W. Van Buren, Suite #2
Phoenix, AZ 85043 USA
Contact: Oliver Adam
Telephone: 01 country code +1.602.437.4732
Fax: 01 country code +1.602.437.4884
Email: Oliver.Adam@agsystems.com
RMA#
For International Shipments to the United States via
Express Courier Service (UPS, FedEx, DHL, etc.):
Tiernan, A Radyne Company
Customer Service
7330 Trade Street
San Diego, CA 92121 USA
Telephone: 01 country code +1.858.805.7000
Fax: 01 country code +1.858.805.7007
RMA #
Tiernan DBR3000 Page iii
Warranty Policy
Shipping Procedure
All returned units will be completely evaluated, repaired, and tested for compliance to the appropriate
specifications. All repaired units will be configured to the default settings.
Shipping Procedures
For All Shipments
• Before you ship your unit, record your configuration settings.
• Ship your unit in the original shipping carton and packaging or its equivalent. Do not include product
accessories such as manuals, rack mount brackets, power cords, or cables.
• Write the RMA number in large, dark print on the outside of the shipping container.
• Reference the RMA number on all paperwork accompanying the unit.
• Fax a copy of the Airway Bill to Tiernan, A Radyne Company.
• Observe antistatic procedures and use antistatic bags for all circuit boards. Tiernan, A Radyne Company
will provide you with antistatic bags upon request.
For International Shipments Only
• Mark the commercial invoice “Goods of US Origin - Return for Repair.”
• When declaring value of goods, use the original sale price.
• Ship the unit with freight prepaid using either:
• Freight Forwarder, under 1990 Incoterm CPT–Carriage Paid To
• Express Courier Service (UPS, FedEx, DHL, etc.) under 1990 Incoterm
• DDU – Deliver Duty Unpaid
Rejection of Shipments
Tiernan, A Radyne Company does not accept responsibility for units that are improperly packaged or damaged in
shipment and may reject such shipments. Tiernan, A Radyne
Company will reject shipments:
• Without an RMA number
• Shipped as Freight Collect
• If the original product identification markings or labels have been removed, defaced, or altered
Customer Service
24 Hours a Day, 7 Days a Week
We know problems don’t occur only during business hours. That’s why Tiernan, A Radyne Company provides a
staff of trained Customer Service Engineers who are available 24 hours a day, 7 days a week.
During Business Hours: Our Customer Service Engineers are available to immediately answer your calls
Monday through Friday, 8:00 a.m. to 5 p.m., Pacific Standard Time.
After Hour Emergencies: For after-hour emergencies, call us at 1.858.805.7000, and select option 1 on the
voicemail system. Leave a message on our 24-hour paging system. A Customer Service Engineer will return your
emergency call as soon as possible.
Leaving a Message
When you leave a message, please speak slowly and clearly and include the following information:
• Your name and the name of your company
• Your phone number including the area code and the country code, as appropriate
• The product name, firmware version, and serial number
• A short description of the problem
A Customer Service Engineer will return your call as soon as possible.
Page iv Tiernan DBR3000
Warranty Policy
To Return a Unit
Contact Customer Service
Before you return a unit for repair, visit our website
http://www.tiernan.com/rma.aspx
and fill out all of the necessary information for our records.
Obtain a RMA Number
Once you have filled out the form online, you will receive your RMA number via e-mail, along with shipping
instructions and a price quotation.
Expired Warranty
If the warranty on your product has expired, the Administrator will fax you a Product Repair Quote.
This quote must be approved and returned to the Customer Service Administrator, along with a valid purchase
order (PO), before an RMA number can be issued.
Online Assistance
E-mail Us
To contact Customer Service via e-mail, send a message to:
customerservice@radn.com
Tiernan on the Web (http://www.radn.com)
Visit us on the World Wide Web for:
• Product and system information
• Sales information
• Investor information
Tiernan DBR3000 Page v
Warranty Policy
Page vi Tiernan DBR3000
Preface
P
This manual provides installation and operation information for the Tiernan, a Radyne Company family of Audio
Broadcast Receivers. This is a technical document intended for use by engineers, technicians, and operators
responsible for the operation and maintenance of the unit.
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>.
Notes, Cautions, and Warnings
A note icon identifies information for the proper operation of your equipment, including helpful
hints, shortcuts, or important reminders.
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.
Trademarks
Product names mentioned in this manual may be trademarks or registered trademarks of their respective
companies and are hereby acknowledged.
Tiernan DBR3000 Page
vii
Preface
Copyright
2007, Tiernan, a Radyne Company. This manual is proprietary to Tiernan, a Radyne Company. and is intended
for the exclusive use of Tiernan, a Radyne Company’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 Tiernan, a Radyne Company.
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. Tiernan, a Radyne
Company assumes no responsibility for use of any circuitry other than the circuitry employed in Tiernan, a
Radyne Company systems and equipment. Furthermore, since Tiernan, a Radyne Company 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 Date Reason for Change
A 07-18-2007 Initial Release
B 08-06-2007 Corrected FL and TIME command descriptions; Updated RMA link
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 Customer Service Department.
Updates to this Manual
The most up-to-date copy of this manual can be downloaded from our web site located at http://www.tiernan.com.
As of the present date, Technical Manuals for Tiernan products are available in PDF format at
http://www.tiernan.com.
Notice
This publication and its contents are proprietary to Tiernan, a Radyne Company, and are intended solely for the
contractual use of its customers for no other purpose than to install and operate the equipment described herein.
This publication and its contents shall not be used or distributed for any other purpose and/or otherwise
communicated, disclosed, or reproduced, in any way whatsoever, without prior written consent of Tiernan, a
Radyne Company.
Only experienced personnel should install and/or operate this equipment. Prior to installing or operating any
equipment or parts thereof, personnel must carefully read and understand all of the contents of this publication.
To properly install and operate this equipment and/or all parts thereof, personnel must strictly and explicitly follow
all of the instructions in this publication.
Failure to completely read and fully understand and follow all of the contents of this publication prior to installing
and/or operating this equipment, or parts thereof, may result in injury to personnel and/or damage to the
equipment, or parts thereof.
Tiernan, a Radyne Company does not assume any liability arising out of the application or use of any products,
component parts, circuits, software, or firmware described herein. Tiernan, a Radyne Company further does not
convey any license under its patent, trademark, copyright, or common- law rights nor the similar rights of others.
Tiernan, a Radyne Company further reserves the right to make any changes in any products, or parts thereof,
described herein without notice.
Page viii Tiernan DBR3000
Preface
Tiernan, a Radyne Company is a registered trademark. Other brand and product names mentioned herein may
be trademarks or registered trademarks of their respective owners.
Contents of this manual are provided as is without warranty of any kind, either expressed or implied, including, but
not limited to, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement.
Content could include technical inaccuracies or typographical errors. Changes are incorporated in new editions of
this manual. Tiernan, a Radyne Company may make improvements and / or changes in the product(s) and / or
the program(s) described in this manual at any time without notice.
In no event will Tiernan, a Radyne Company be liable for direct, indirect, special, incidental, economic, cover, or
consequential damages arising out of the use or inability to use the contents even if advised of the possibility of
such damages. Some jurisdictions do not allow the exclusion or limitation of implied warranties, or the limitation of
liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. For
further information on legal and intellectual property matters, contact Tiernan, a Radyne Company.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at his own expense.
Electric Shock Hazard
Do Not Open The Equipment!
Service Only by Tiernan, a Radyne Company.
Gefährliche Spannung!
Öffuen des Gerätes und Service nur dur Tiernan, a Radyne Company.
The unit contains no user-serviceable parts. Do not attempt to service this product yourself. Any
attempt to do so will invalidate any and all warranties.
Tiernan DBR3000 Page ix
Preface
Page x Tiernan DBR3000
Safety Precautions
SP
Carefully read and follow all safety, use, and operating instructions before operating the unit. Heed all warnings
and cautions contained in this guide. Retain these instructions for future reference.
Follow Startup Procedure
Do not plug in the unit until you have connected the system and read the chapter on installation.
Provide a Safe Location
Place the unit in a rack or on a stable surface of sufficient size and strength, where it will not be jarred, hit, or
pushed off its surface. Ensure that all cables and cords are out of the way and will not be tripped over, as this
could cause personal injury or serious damage to the equipment.
Avoid Water and Moisture
If the equipment is exposed to any liquid, contact Tiernan, a Radyne Company , as serious damage could occur
to the unit or its components.
Avoid Heat, Humidity, and Dust
To avoid internal damage, the unit should be placed away from all heat sources, including radiators, heater ducts,
and so on, out of direct sunlight and away from high humidity, excessive dust, or mechanical vibrations that can
cause damage to internal parts.
Provide Adequate Ventilation
Slots and openings on the unit are provided for ventilation that is needed to ensure reliable operation. To avoid
overheating and ensure that the ventilation slots are not blocked, place the unit on a smooth, hard surface that
has at least two inches of clearance around the unit and adequate air circulation. If the equipment is placed in a
closed area, such as a rack, ensure that proper ventilation is provided and that the internal rack operating
temperature does not exceed the maximum rated temperature at the position of the unit.
Never place the unit on a soft surface that would obstruct the required airflow into the ventilation slots.
Use Correct Power Source
For units equipped with a North American power cord, the cord has an IEC-compatible female plug on one end,
and a male plug on the other end. This cord is UL and CSA approved up to 125 VAC at 10 A and is ready to use
with no user wiring required.
For units equipped with an International power cord, the cord has an IEC-compatible female plug on one end, and
three stripped and tinned bare wires on the other end. This cord is approved up to 250 VAC at 6 A and complies
with the international color codes of green/yellow (ground), blue (neutral), and brown (line).
If these color codes do not correspond to the colored markings on the terminals in the plug, use the following
standards:
• The green/yellow wire must be connected to the plug terminal marked by the letter E or by the earth
symbol () or color-coded green and yellow.
• The blue wire must be connected to the plug terminal marked with the letter N or color-coded black.
• The brown wire must be connected to the plug terminal marked with the letter L or color-coded red.
An AC plug must be attached to the International power cord in accordance with government standards and
codes in effect at the installation site. If an unterminated power cord is supplied with the unit, the appropriate
Tiernan DBR3000 Page
xi
Safety Precautions
certified termination plug must be installed. The following is a list of the required certifying agencies for various
countries.
Country Agency Country Agency
Australia SAA Italy IMQ
Austria OVE Japan MITI
Belgium CEBEC Netherlands KEMA
Canada CSA New Zealand
Denmark DEMKO Norway NEMKO
Finland FEI Rep. S. Africa SABS
France UTE Spain AEE
Germany VDE Sweden SEMKO
India ISI Switzerland SEV
Ireland IIRS United Kingdom (UK) ASTA, BSI
SECV, SECQ, SECWA,
EANSW, ETSA, HECT,
SANZ
Apparaten skall anslutas till jordat uttag när den ansluts till ett nätverk.
Route Power Cords Safely
Route power cords so they are not walked on or pinched. Pay particular attention to cords and connections at the
plugs, receptacles (such as power strips), and the point where they exit from the unit and attach to other
equipment. Do not place any items on or against power cords.
No Stacking
Do not place or stack any objects on top of the unit. Other equipment may be placed in a rack or on a shelf above
or below the unit, but never stacked directly on top of it.
Protect Against Lightning and Power Surges
When the unit is installed, have the professional installer ground the system to protect against voltage surges and
built-up static charges. For information on grounding standards for electrical and radio equipment, refer to the
electrical code in the country of installation.
Protect the unit from lightning and power-line surges during a storm by unplugging it from the wall outlet and
disconnecting the coaxial cable.
Provide Antistatic Protection
Wear a properly grounded antistatic wrist strap to prevent electrostatic damage to components when handling
circuit boards or other electronic modules.
Turn the unit Off When Changing Circuit Boards
Turn the unit off before installing or removing any circuit boards from chassis slots. Possible damage may occur
to modem, boards, or related equipment if power is left on during this procedure.
Page xii Tiernan DBR3000
Safety Precautions
Lithium Battery
The lithium battery is not placed in an operator accessible area. The battery is part of an approved semiconductor
package and is only replaceable by qualified service personnel.
Keep Objects Outside
Touching internal unit parts is dangerous to both you and the unit. Never put any object, including your fingers,
through slots or openings, as this could result in touching dangerous voltage points, short-circuiting parts, electric
shock, or fire.
There are no user-serviceable parts inside the unit. If an object falls into the equipment, unplug the unit and
contact Customer Service, as serious damage could occur to the unit or its components.
Use Approved Attachments Only
Use only Tiernan, a Radyne Company-approved option cards and equipment with the unit.
Clean the Unit
Before cleaning the unit, unplug it from the wall outlet. Do not use any type of abrasive pads, scouring powders,
aerosol cleaners, or solvents such as alcohol or benzene.
Use only a clean, soft cloth lightly moistened with a mild detergent solution. Wipe all equipment with a clean, soft
cloth lightly moistened with water to remove the detergent solution.
Service the Unit
Do not attempt to service the unit yourself, as there are no user-serviceable parts. Opening or removing covers
may expose you to dangerous voltages or other hazards as well as void your warranty. Contact Customer Service
to obtain qualified service personnel.
The following conditions indicate that the equipment needs servicing:
• The power cord or plug has been damaged.
• An object has fallen into the unit.
• Liquid has been spilled into the unit, or it has been exposed to rain or water.
• The unit has been dropped or the cover has been damaged.
• The unit does not operate normally, or it shows a marked change in performance.
Perform Safety Checks
Upon completion of any service or repairs to the unit, ask the service technician to perform safety checks to verify
that the system is in safe operating condition.
Tiernan DBR3000 Page xiii
Safety Precautions
Page xiv Tiernan DBR3000
Table of Contents
To C
Warranty Policy......................................................................................................................................iii
Preface...................................................................................................................................................vii
Safety Precautions ................................................................................................................................xi
Chapter 1 Product Overview.....................................................................................................1-5
1.1 Introduction .................................................................................................................................... 1-5
1.2 Satellite Data Distribution Network Overview ................................................................................ 1-5
1.3 DBR Features ................................................................................................................................ 1-6
Chapter 2 Functional Description and Theory of Operation..................................................2-8
2.1 Functional Description ................................................................................................................... 2-8
2.1.1 Outdoor Components ........................................................................................................................2-8
2.1.2 Feed Assembly and LNB Downconverter........................................................................................ 2-10
2.1.3 Interfacility Link (IFL) Cable............................................................................................................. 2-10
2.1.4 DBR Satellite Receiver .................................................................................................................... 2-11
2.1.5 Using the Front Panel ...................................................................................................................... 2-11
2.2 Theory of Operation..................................................................................................................... 2-12
2.2.1 Satellite Link..................................................................................................................................... 2-13
2.3 DBR Carrier Acquisition............................................................................................................... 2-15
2.3.1 Installation Mode Acquisition ........................................................................................................... 2-15
2.3.2 Fade Acquisition .............................................................................................................................. 2-16
Chapter 3 Quick Installation .....................................................................................................3-1
3.1 Overview........................................................................................................................................ 3-1
3.2 Quick Installation Procedure.......................................................................................................... 3-1
Chapter 4 Full Installation and Startup ....................................................................................4-3
4.1 Overview........................................................................................................................................ 4-3
4.2 Installation Overview...................................................................................................................... 4-3
4.3 Planning the Site............................................................................................................................ 4-3
4.4 Installing and Aligning the Antenna ............................................................................................... 4-3
4.5 Installing the IFL Cable .................................................................................................................. 4-4
4.6 Installing the DBR .......................................................................................................................... 4-4
4.6.1 Rack-Mount........................................................................................................................................ 4-4
4.7 External Connections..................................................................................................................... 4-5
Tiernan DBR3000 Page
1-1
Theory of Operation
4.7.1 Data ...................................................................................................................................................4-6
4.7.2 AUX (Auxiliary)................................................................................................................................... 4-6
4.7.3 Ethernet .............................................................................................................................................4-7
4.7.4 M&C ...................................................................................................................................................4-7
4.7.5 RF In .................................................................................................................................................. 4-7
4.7.6 USB.................................................................................................................................................... 4-8
4.7.7 Power Connector ...............................................................................................................................4-8
4.8 Starting Up the System.................................................................................................................. 4-9
4.9 Startup Problems ......................................................................................................................... 4-11
4.9.1 The Receiver Will Not Lock Onto The Satellite Signal ....................................................................4-11
4.9.2 No Data Is Received from the Data Port .........................................................................................4-12
Chapter 5 Remote Monitor and Control Operation ...............................................................5-13
5.1 Overview...................................................................................................................................... 5-13
5.2 Command Syntax ........................................................................................................................ 5-13
5.3 Password Protection.................................................................................................................... 5-14
5.4 Command Error Codes................................................................................................................ 5-14
5.5 Command Groups ....................................................................................................................... 5-14
5.6 Command Descriptions ............................................................................................................... 5-16
Chapter 6 Maintenance and Troubleshooting.......................................................................6-29
6.1 Maintenance ................................................................................................................................ 6-29
6.2 Performance Monitoring .............................................................................................................. 6-29
6.2.1 Eb/No Minimum Receive Level (EM)............................................................................................... 6-29
6.2.2 Number of RF Signal Fades (NF).................................................................................................... 6-29
6.3 Fault Condition Descriptions........................................................................................................ 6-30
6.4 Troubleshooting ........................................................................................................................... 6-31
6.4.1 Before Troubleshooting ...................................................................................................................6-31
6.4.2 Symptoms and Actions ....................................................................................................................6-31
Chapter 7 Technical Specifications and Port Information .....................................................7-1
Appendix A Interface Pinouts ..................................................................................................... A-1
Appendix B Interfacility Link Cable Characteristics .................................................................B-1
1-2 Tiernan DBR3000
Theory of Operation
List of Figures
Figure 1.1 Satellite Data Distribution Network ...........................................................................................1-6
Figure 2.1 Receive-Only Antenna Assembly.............................................................................................2-9
Figure 2.2 LNB Downconverter PLL Block Diagram.................................................................................2-10
Figure 2.3 DBR Unit............................................................................................................................2-11
Figure 2.4 Installation Acquisition Mode .............................................................................................2-16
Figure 2.5 Fade Acquisition Mode ......................................................................................................2-16
Figure 4.1 Rear Panel Connectors .......................................................................................................4-5
Tiernan DBR3000 Page 1-3
Theory of Operation
List of Tables
Table 2.1 Available Prodelin Antenna Sizes..............................................................................................2-9
Table 2.2 Front Panel Indicators.........................................................................................................2-11
Table 2.3 Signal Quality Defaults........................................................................................................2-12
Table 4.1 IFL Cable Loss vs. Data Rate ...................................................................................................4-4
Table 4.2 Certifying Agencies by Country .................................................................................................4-9
Table 5.1 Error Codes/Descriptions .......................................................................................................5-14
Table 5.2 Alphabetical Command Listing................................................................................................5-14
Table 5.3 Acquisition Type, Action, Status..............................................................................................5-17
Table 5.4 Fault Summary......................................................................................................................5-20
Table 5.5 Parameter Descriptions..........................................................................................................5-23
Table 5.6 Valid Parameter Values for the P2 Command ..........................................................................5-25
Table 5.7 Signal Strength LED Indication ...............................................................................................5-27
1-4 Tiernan DBR3000
Theory of Operation
Chapter 1 Product Overview
1
1.1 Introduction
Satellite communication is a proven, reliable method for real-time and near real-time data transfer. A single
satellite transmission footprint can blanket an area containing any number of receivers, making satellite networks
particularly suited for large-area broadcast applications. Remote reception sites can be easily added without
further network setup costs. Since the satellite link is virtually instantaneous, such communication is ideal for timeintensive applications.
The DBR3000 Digital Broadcast Receiver is an extremely reliable, powerful and easy-to-use system that enables
you to take advantage of these and many other benefits of satellite communications.
This chapter provides an overview of a typical satellite distribution network, as well as an overview of the
DBR3000 Digital Broadcast Receiver.
1.2 Satellite Data Distribution Network Overview
A satellite broadcast network consists of three major subsystems, as shown in Figure 1-1:
• A satellite transmission uplink station
• The satellite link
• One or more remote satellite receivers
Tiernan DBR3000 Page 1-5
Theory of Operation
Data
Input
Hub
RF
Tx
.
.
.
Data
Output
Data
Output
Figure 1.1 Satellite Data Distribution Network
The hub or satellite transmission uplink station is the facility where the data to be transmitted is collected and
uplinked to the satellite. This facility consists of a satellite modem, an earth station, an antenna and a network
control computer. As an option, an Ethernet link can provide diagnostics and performance monitoring of receiver
sites using Telnet.
• The satellite link consists of a commercial telecommunications satellite in geosynchronous orbit above the
earth. Two radio frequency bands that are primarily used are C-band and Ku-band.
Data
Output
• The third major subsystem, the remote satellite receiver, includes three major components:
• A satellite antenna subsystem
• An interfacility link cable
• A satellite data receiver such as the DBR
The satellite antenna and its associated Low Noise Block (LNB) downconverter collect and convert the signal
from the satellite's native C- or Ku-band signal to L-band.
A phase lock loop (PLL) type LNB must be used for all satellite links using the QPSK modulation. Satellite links
using BPSK modulation may use the lower cost dielectric resonance oscillator (DRO) type LNB.
The L-Band signal is then sent through the interfacility link (IFL) cable to the satellite receiver. The DBR data
receiver processes this signal and outputs the data serially using RS-422.
1.3 DBR Features
The DBR:
• Accommodates both Ku- or C-band in BPSK or QPSK mode
1-6 Tiernan DBR3000
Theory of Operation
• Has two Link Table Definitions so that a reserve link can be activated to accommodate network changes
• Has a built-in performance monitoring capability that measures the lowest received Eb/No
• Has a battery-backed SRAM memory and real-time clock (RTC) so that configuration and operating
parameters are not lost in the event of a power outage and event logs specify time
• Provides a 10/100BASE-T Fast Ethernet port running a Telnet server for monitor and control from any
computer or other device containing an Ethernet port and Telnet client software
• Provides a front panel interface that allows for quick monitoring
The remaining portion of this manual describes in detail the steps necessary to install, configure, and operate the
DBR digital audio receiver within a network environment.
Tiernan DBR3000 Page 1-7
Theory of Operation
Chapter 2 Functional Description and Theory of
Operation
This chapter provides functional descriptions and operational theory for the basic components of the DBR
receiver system. The DBR system consists of the following:
• An outdoor receive-only antenna and feed-optional antenna sizes range from .75 to 2.4 meters
• A low noise block (LNB) downconverter assembly that performs the initial signal downconversion
(optional frequencies)
• A user-supplied interfacility link (IFL) cable connecting the LNB downconverter on the antenna to the DBR
• A DBR receiver providing an L-band demodulator
2
2.1 Functional Description
2.1.1 Outdoor Components
The outdoor components consist of an antenna assembly, a feed assembly, and an LNB downconverter.
2.1.1.1 Antenna Assembly
The antenna assembly consists of the satellite reflector, mast, feed horn, and LNB downconverter. The antenna
assembly collects and concentrates RF transmissions that are produced by a communication satellite and
converts them to an electronic signal. A typical antenna assembly is shown in Figure 2-1.
2-8 Tiernan DBR3000
Theory of Operation
Figure 2.1 Receive-Only Antenna Assembly
The optional antenna supplied with the DBR system is an elliptical offset feed-type suited for receive-only
applications. The appropriate antenna size is determined by the location and transmitted satellite power (EIRP)
for each installation. Available antenna sizes are shown in Table 2-1.
Table 2.1 Available Prodelin Antenna Sizes
C-Band Ku-Band
1.2 m linear or cicular .60 m AZ/EL mount
.60 m wall mount
1.8 m linear or cicular
2.4 m linear or cicular .90 m AZ/EL mount
3.0 m linear or cicular 1.0 m AZ/EL mount
3.4 m linear or cicular 1.2 m AZ/EL mount
3.7 m linear or cicular
(also polar mount)
1
Available in both single and dual feed
• .76 m AZ/EL mount
• .76 m wall mount
• 1.8 m AZ/EL mount
• 2.4 m AZ/EL mount
• 3.0 m AZ/EL mount
• 3.4 m AZ/EL mount
• 3.7 m AZ/EL mount
1
1
1
1
1
The antenna subsystem receives DC power from the DBR receiver via the IFL cable, so an additional power
source is not required at the antenna site.
The reflector is mounted on a continuously adjustable azimuth/elevation positioner that supports precision aiming
to the satellite of choice. For proper signal reception, the antenna must have an unobstructed view of the satellite
Tiernan DBR3000 Page 2-9
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