Tait TB9400 User manual

DRAFT 4
TB9400 base station
Installation and Operation
Manual
Draft in Progress
MBC-00001-01
Issue 1
September 2011

DRAFT 4
2TB9400 Installation and Operation Manual
© Tait Electronics Limited September 2011
Contact Information
Tait Radio Communications
Corporate Head Office
Tait Electronics Limited
P.O. Box 1645
Christchurch
New Zealand
For the address and telephone number of regional
offices, refer to our website:www.taitradio.com
Copyright and Trademarks
All information contained in this document is the
property of Tait Electronics Limited. All rights reserved.
This document may not, in whole or in part, be copied,
photocopied, reproduced, translated, stored, or reduced
to any electronic medium or machine-readable form,
without prior written permission from Tait Electronics
Limited.
The word TAIT and the TAIT logo are trademarks of
Tait Electronics Limited.
All trade names referenced are the service mark,
trademark or registered trademark of the respective
manufacturers.
Disclaimer
There are no warranties extended or granted by this
document. Tait Electronics Limited accepts no
responsibility for damage arising from use of the
information contained in the document or of the
equipment and software it describes. It is the
responsibility of the user to ensure that use of such
information, equipment and software complies with the
laws, rules and regulations of the applicable
jurisdictions.
Enquiries and Comments
If you have any enquiries regarding this document, or
any comments, suggestions and notifications of errors,
please contact your regional Tait office.
Updates of Manual and Equipment
In the interests of improving the performance, reliability
or servicing of the equipment, Tait Electronics Limited
reserves the right to update the equipment or this
document or both without prior notice.
Intellectual Property Rights
This product may be protected by one or more patents
or designs of Tait Electronics Limited together with
their international equivalents, pending patent or design
applications, and registered trade marks: NZ409837,
NZ409838, NZ508806, NZ508807, NZ509242,
NZ509640, NZ509959, NZ510496, NZ511155,
NZ511421, NZ516280/NZ519742, NZ520650/
NZ537902, NZ521450, NZ522236, NZ524369,
NZ524378, NZ524509, NZ524537, NZ524630,
NZ530819, NZ534475, NZ534692, NZ535471,
NZ537434, NZ546295, NZ547713, NZ569985,
NZ577009, NZ579051, NZ579364, NZ580361,
AU2003281447, AU2004216984, AU2005267973,
AU11677/2008, AU13745/2008,
CN200930004200.4, CN200930009301.0,
CN1031871, CN1070368, EU000915475-0001,
EU000915475-0002, GB2386010, GB23865476,
GB2413249, GB2413445, US5745840, US7411461,
US7649893, US10/523952, US10/546696, US10/
546697, US10/547964, US10/597339, US11/572700,
US29/306491, US61/218015, US61/236663, US61/
238769, US61/251372.
This product may also be made under license under one
or more of the following U.S. Patents: 4,590,473
4,636,791 4,716,407 4,972,460 5,146,497 5,148,482
5,164,986 5,185,795 5,185,796 5,271,017 5,377,229
5,502,767.
The IMBE™ voice coding Technology embodied in
this product is protected by intellectual property rights
including patent rights, copyrights and trade secrets of
Digital Voice Systems, Inc. This voice coding
Technology is licensed solely for use within this
Communications Equipment. The user of this
Technology is explicitly prohibited from attempting to
decompile, reverse engineer, or disassemble the Object
Code, or in any other way convert the Object Code
into a human-readable form. Protected by U.S. Patents
5,870,405 5,826,222 5,754,974 5,701,390 5,715,365
5,649,050 5,630,011 5,581,656 5,517,511 5,491,772
5,247,579 5,226,084 and 5,195,166.
Environmental Responsibilities
Tait Electronics Limited is an
environmentally responsible company
which supports waste minimization,
material recovery and restrictions in the
use of hazardous materials.
The European Union’s Waste Electrical and Electronic
Equipment (WEEE) Directive requires that this product
be disposed of separately from the general waste stream
when its service life is over. For more information
about how to dispose of your unwanted Tait product,
visit the Tait Electronics WEEE website at
www.taitradio.com/weee. Please be environmentally
responsible and dispose through the original supplier, or
contact Tait Electronics Limited.
Tait Electronics Limited also complies with the
Restriction of the Use of Certain Hazardous Substances
in Electrical and Electronic Equipment (RoHS)
Directive in the European Union.
In China, we comply with the Measures for
Administration of the Pollution Control of Electronic
Information Products. We will comply with
environmental requirements in other markets as they are
introduced.

DRAFT 4
TB9400 Installation and Operation Manual 3
© Tait Electronics Limited September 2011
Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Associated Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Publication Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2 Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.3 Mechanical Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.4 Frequency Bands and Sub-bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1.5 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1.6 Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
1.7 Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1.7.1 Signal Paths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1.7.2 Online and Offline Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1.7.3 Intermodule Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
1.7.4 Power Management and Distribution . . . . . . . . . . . . . . . . . . . . . . . . . 23
1.7.5 PMU Operation on DC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1.7.6 Front Panel Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2 General Safety and Regulatory Information. . . . . . . . . . . . . . . . . . . . . . . . . 29
2.1 Personal Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.1.1 Unpacking and Moving the Equipment . . . . . . . . . . . . . . . . . . . . . . . 29
2.1.2 Lethal Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.1.3 AC Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.1.4 Explosive Environments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.1.5 Proximity to RF Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.1.6 High Temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.1.7 LED Safety (EN60825-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.2 Equipment Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
2.2.1 Installation and Servicing Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . 31
2.2.2 Preventing Damage to the PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
2.2.3 ESD Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
2.2.4 Anti-tampering Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.3 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.3.1 Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.3.2 Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.3.3 Dust and Dirt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.4 Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.4.1 Distress Frequencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.4.2 FCC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.4.3 Unauthorized Modifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

DRAFT 4
4TB9400 Installation and Operation Manual
© Tait Electronics Limited September 2011
2.4.4 Health, Safety and Electromagnetic Compatibility in Europe. . . . . . . . 34
3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.2 Module Indicator LEDs and Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.2.1 Reciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.2.2 PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.2.3 PMU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4 Working with Base Stations from Your PC . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.1 PC Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4.2 Connecting Your PC to the Base Station. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4.2.1 Logging In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4.2.2 Setting the IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.2.3 Responding to Security Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.2.4 Connecting a Networked PC to a Base Station. . . . . . . . . . . . . . . . . . 50
4.2.5 Troubleshooting Connection Problems . . . . . . . . . . . . . . . . . . . . . . . 51
4.2.6 Finding a Lost or Forgotten IP Address . . . . . . . . . . . . . . . . . . . . . . . 52
4.3 Working with the Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4.3.1 Monitoring Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.3.2 Viewing Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.3.3 Viewing the Base Station and Network Identity . . . . . . . . . . . . . . . . . 57
4.4 Basic Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.4.1 User Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.4.2 Taking the Base Station Offline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.4.3 Troubleshooting Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.4.4 Working with Configuration Files . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.4.5 Configuring Single Base Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.4.6 Configuring Base Stations in a Channel Group . . . . . . . . . . . . . . . . . . 60
4.4.7 Setting Up Custom Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4.4.8 Disabling the Front Panel Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4.4.9 Preparing to Download Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.1 Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.1.1 Equipment Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.1.2 Grounding and Lightning Protection . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.1.3 Equipment Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
5.1.4 Ambient Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
5.1.5 Cabinet and Rack Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
5.2 Unpacking and Moving the Subrack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
5.3 Identifying the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
5.4 Initial Setting Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
5.4.1 Confirming Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
5.4.2 Customizing the Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
5.4.3 Changing the Root Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
5.4.4 Tuning the Reciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

DRAFT 4
TB9400 Installation and Operation Manual 5
© Tait Electronics Limited September 2011
5.5 Installing the Base Station on Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
5.5.1 Base Stations for Trunked Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
5.5.2 Equipment Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
5.5.3 Mounting the Subrack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
5.6 Connecting Up the Base Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
5.6.1 Connection Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
5.6.2 Connecting AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
5.6.3 Connecting DC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
5.6.4 Connecting the Auxiliary DC Power Output . . . . . . . . . . . . . . . . . . . 83
5.6.5 Connecting RF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
5.6.6 Connecting an External Frequency Reference . . . . . . . . . . . . . . . . . . 85
5.6.7 Connecting a 1PPS Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
5.6.8 Ethernet Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
5.6.9 Connecting General Purpose Inputs and Outputs . . . . . . . . . . . . . . . . 87
6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
8 Replacing Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
8.1 Saving the Base Station’s Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
8.2 Preliminary Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
8.3 Replacing a Reciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
8.4 Replacing a Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
8.5 Replacing a Power Management Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
8.6 Replacing the Front Panel Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
8.7 Replacing the Module Guide Rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
8.8 Replacing the Subrack Interconnect Board . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
8.9 Final Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Appendix A – Interface Pin Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
System Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Ethernet Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
PMU Auxiliary DC Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Appendix B – Inter-Module Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Dual 50W Base Station. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Single 50W Base Station. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
100W Base Station. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
TaitNet P25 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
Tait Software License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

DRAFT 4
6Preface TB9400 Installation and Operation Manual
© Tait Electronics Limited September 2011
Preface
Scope of Manual
This manual provides information on installing and operating the TB9400
base station. It is intended for use by experienced technicians familiar with
installing and operating base station equipment. It also includes
configuration, maintenance and troubleshooting information.
Document Conventions
The TB9400 base station has a web interface with an accordion menu on
the left side of the screen. “Configure > Base Station > Channels” means
click Configure in the top-level menu, then in the expanded Configure
menu click the + icon beside Base Station to expand its menu tree, and
finally click Channels in this menu tree to display its page.
Within this manual, four types of alerts are given to the reader: Warning,
Caution, Important and Note. The following paragraphs illustrate each type
of alert and its associated symbol.
Warning!! This alert is used when there is a potential risk
of death or serious injury.
Caution This alert is used when there is a risk of minor or
moderate injury to people.
Important This alert is used to warn about the risk of equipment dam-
age or malfunction.
Note This alert is used to highlight information that is required to
ensure procedures are performed correctly.
?These alert icons &
definitions will change.

DRAFT 4
TB9400 Installation and Operation Manual Preface 7
© Tait Electronics Limited September 2011
Associated Documentation
The current set of TB9400 product documentation is provided in PDF
format on the product DVD. Updates are made available on the Tait support
website. Printed copies of the documentation are available on request.
■TB9400 Specifications Manual (MBC-00002-xx).
■TaitNet P25 System Manual (MBA-00032-xx).
■T801-4 GPS Frequency Reference Installation and Operation Manual
(MBA-00033-xx).
Technical notes are published from time to time to describe applications for
Tait products, to provide technical details not included in manuals, and to
offer solutions for any problems that arise. The product DVD includes
technical notes that were available at the time of release. Look for new or
updated technical notes on the Tait support website.
Publication Record
Issue Publication Date Description
1 First release

DRAFT 4
8Preface TB9400 Installation and Operation Manual
© Tait Electronics Limited September 2011

DRAFT 4
TB9400 Installation and Operation Manual Description 9
© Tait Electronics Limited September 2011
1 Description
The Tait TB9400 base station is a robust state-of-the-art digital fixed station
that combines Tait’s proven strengths in reliability, high performance and
modular design with software-based configurability and operation, digital
signal processing and voice-over-IP technology.
The base station is designed for operation in a Project 25 trunked or trunked
simulcast radio network. The ability of the base station to link stations using
standard Internet Protocol communications, and to add features through
software options ensures that P25 systems designed with the TB9400 are
scalable in both size and functionality.
The base station combines industry-leading digital voice quality with
rugged design specifications and intuitive user interfaces. These products
have been designed to meet the demanding needs of the public safety and
public service sectors.
Its Ethernet interface provides built-in network connectivity, allowing the
TB9400 to join with other TB9400 base stations to form a channel group.
This network supports voice over IP and remote management of all base
stations via a web browser.

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10 Description TB9400 Installation and Operation Manual
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1.1 Features
The following are some of the features of the base station:
■Fully compliant with the Project 25 Common Air Interface. Can
therefore interoperate with any similarly compliant radios.
■Integrated built-in voting facility. No external voter is needed.
■Can be completely managed remotely from a PC running a web
browser: configuration, alarm monitoring, fault diagnosis, feature and
firmware upgrades.
■An integrated wiring solution is provided for the system control bus and
DC power connections to each module in the subrack.
■Reciters can be replaced without affecting the operation of other reciters
in the same subrack.
■Rugged construction with generous heatsinks and fan-forced cooling for
continuous operation from –30°C to +60°C (–22°F to +140°F).

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1.2 Modules
The base station consists of a subrack with up to two transmit/receive
channels.
The single PMU (power management unit) supplies and manages power to
the whole subrack (refer to “Theory of Operation” on page 19). One reciter
and one PA (power amplifier) are needed for each transmit/receive channel.
There is also a front panel with user controls and fans. The modules are
interconnected at the front of the subrack. External connections to the
modules are located at the rear.
Modules come in different variants depending, for example, on the RF band
or the supply voltage.
Each module is inserted into the 4U subrack from the front and is secured
at the front with a metal clamp. Both clamp and module are easily removed
for rapid module replacement. The modules are secured laterally with plastic
guides that clip into the top and bottom of the subrack. These guides can be
easily repositioned to change the configuration of a subrack. The heavier
modules are also secured laterally by metal tabs at the rear of the subrack.
The following provides a brief description of the available modules.
Reciter The reciter module comprises the
receiver, exciter and digital control
circuitry. The reciter provides the
Ethernet interface and system inputs
and outputs.

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Power Amplifier The PA amplifies the RF output from the reciter and is available in 50W
and 100W models.
The 50W model mounts vertically in the subrack, while the 100W model
mounts horizontally as it has a wider heatsink. The 100W PA is also fitted
with an airflow duct.
Both models are designed to operate on the 28VDC output provided by the
PMU.
Power
Management Unit The PMU provides the 28VDC
power supply for the modules in the
subrack. The input voltage can be AC,
DC or both AC and DC, depending
on the model. The PMU also has an
auxiliary DC output of 13.65VDC,
27.3VDC, or 54.6VDC, depending
on the model.
50W PA 100W PA
AC and DC PMU shown

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Front Panel The front panel is mounted onto the subrack with two quick-release
fasteners. It incorporates the indicator LEDs, four-line LCD display, user
controls and cooling fans.
The indicator LEDS allow some monitoring of the operational status of the
base station. The user controls and display allow the technician to configure
the IP address of each module. Refer to “Front Panel” on page 36 for more
information.
Note The microphone input and speaker are not used in this release of
the TB9400.
Subrack The 4U subrack is made of passivated steel and is designed to fit into a
standard 19 inch rack or cabinet. The subrack is fitted with an interconnect
board that connects the system control bus and power to the modules and
front panel. The position of a module in the subrack is defined by the socket
on the subrack interconnect board to which the module is connected by the
system control bus.

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1.3 Mechanical Assembly
This section illustrates the main mechanical components of the base station.
Figure 1.1 below shows the configuration for a typical dual 50W base
station. The PMU occupies the slot at the left end of the subrack, with the
reciter and PA pairs to the right of it. Each PA is mounted vertically with its
heatsink facing its associated reciter. The PMU and each reciter/PA pair
have their own cooling fans.
The front panel can be easily removed from the subrack by undoing two
quick-release fasteners. Refer to “Replacing Modules” on page 93 for more
details.
.
Figure 1.1 Mechanical assembly - dual 50W base station with front panel
bfront panel ireciter 1
csubrack jmodule retaining clamp
dPMU 1) subrack interconnect board
ePA 2 1! plastic guide rail
freciter 2 1@ subrack interconnect board retaining clamp
gcable retaining clip 1# front panel fastener
hPA 1
bcdefghi
j
1)
1!
1@
1#

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Figure 1.2 below shows the configuration for a typical single 50W base
station. The PMU occupies its usual slot at the left end of the subrack, with
the reciter and PA pair at the right of the subrack. The PA is mounted
vertically with its heatsink facing the reciter. The PMU and the reciter/PA
pair have their own cooling fans.
Figure 1.2 Mechanical assembly - single 50W base station
bPMU dreciter
c50W PA esubrack
bc
de

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Figure 1.3 below shows the configuration for a typical 100 W base station.
The PMU occupies its usual slot at the left end of the subrack, with the PA
directly beside it. The reciter occupies the slot at the right of the subrack.
Unlike the 50W PAs, the 100W PA is mounted horizontally with the
heatsink facing upwards. It is also fitted with an airflow duct to channel the
airflow from the cooling fan through the heatsink fins.
Figure 1.3 Mechanical assembly - single 100W base station
bPMU ereciter
cPA fsubrack
dairflow duct gcable retaining clip
bcde
f
g

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1.4 Frequency Bands and Sub-bands
The first release of the base station operates only on K band. Later releases
will support operation on other frequency bands.
1.5 Applications
The TB9400 is designed for operation in a TaitNet P25 trunked radio
network. It can operate as a single base station or as part of a channel group
or simulcast channel group, and as a traffic channel or control channel.
In a trunked simulcast network, the transmitters in the channel group are
synchronized and transmit simultaneously on the same frequency. Each
transmitter needs a highly accurate 1PPS pulse and an external frequency
reference, so that it can time transmissions with the required accuracy. We
also recommend using an NTP server at each site, as this will ensure a
common timestamp in logs across all units in the system.
For more information, refer to the TaitNet P25 System Manual.
Frequency
Identification Frequency Band and Sub-band
K band K4 = 762MHz to 870MHza
a. The actual frequency coverage in this band is:
Transmit: 762MHz to 776MHz, and 850MHz to 870MHz
Receive: 792MHz to 824MHz

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1.6 Licenses
Some operational functions of the base station are controlled by licenses.
These functions will not work unless you purchase the appropriate feature
license and enable the feature set controlled by that license. The feature sets
currently available are listed below.
P25 Common Air
Interface Allows the base station to go into Online mode. Base stations are always
provided with this license.
P25 Trunking
Operation Allows a base station to participate in a trunking system. Without this
feature, the base station cannot provide a control or a status connection to a
trunking site controller and it cannot function as a control or traffic channel.
Networking with
Centralized Voter Allows the base station to act as a central voter within its channel group. This
feature also allows voice networking. Only base stations that will centrally
vote (normally the central voter and its backup) need this feature. The other
members of the channel group only need the networking with distributed
voter feature. A standard trunked base station (standalone without fill-in
repeaters or other channel group members) can function as a master or a
failsoft repeater without this license.
Simulcast
Transmitter This feature is required in base stations that have transmitters and belong to
a simulcast network.
Simulcast
Modulation Allows the base station to transmit using the LSM modulation scheme. This
scheme is designed to minimize performance degradation in simulcast
channels caused by delay spread.
Failsoft for P25
Trunking Allows trunked channels that become isolated from a site controller to
perform simple conventional operation and to interface to a digital dispatch
system. If a trunked channel consists of several base stations in a channel
group, only the central voter (normally the master) needs this license. It is
then able to become the failsoft repeater for that channel group.
Phase 2 Operation
(not yet available) This feature will allow the base station to operate in trunking mode using
two-slot TDMA as defined by the P25 Phase 2 standard.

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1.7 Theory of Operation
The reciter receives RF signals from its RF input and sends RF from its RF
output to the PA, along with a PA key signal. The PA sends an RF feedback
signal to the reciter for linearization and power control purposes. The reciter
also receives signals from, and sends signals to, the system interface, the
Ethernet interface, and the front panel (see Figure 1.4).
A system control bus interconnects the modules and carries alarm and
control signaling between the reciter and the other modules.
The Ethernet interface carries voice over IP and also allows maintainer
access via a web browser.
Figure 1.4 Base station high-level diagram
Reciter
PMU PA
RF To
Antenna
RF From
Antenna 1PPS*
External
Reference
Frequency*
AC Input
DC Input
28VDC
System Control Bus
RF + PA Key
RF Feedback
System Input
and Output
Ethernet Interface
to Network
Front
Panel
*optional for non-simulcast systems

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The reciter carries out signal processing and has overall control of the base
station. It has four boards, as shown in Figure 1.5.
The receiver board contains all the receiver circuitry, while the exciter
circuitry is located on the transmit forward board.
The reciter control board converts information between analog and digital
and controls the maintainer’s access via the front panel. It performs the air
interface signal processing for digital P25 mode, gives the base station an
identity as a network element, and provides the physical connections for the
Ethernet and system interfaces.
Figure 1.5 Reciter boards
RF Input
RF Input
(feedback
from PA)
RF Output
Receiver
Board
Transmit
Forward
Board
Transmit
Reverse
Board
Front
Panel
Reciter
Control
Board
Maintainer Access
System Input
and Output
Ethernet Interface
to Network