Axell Wireless 80 3014SERIES User Manual
L.A. M.T.A. BDA Line Amplifier
User/Maintenance Handbook
For
GETS Global Signalling LLC
AWL Works Order Q115342
Product Part Nos.
In-Line BDA Wall Mount 80-301401
In-Line BDA Rack Mount 80-301406
AFL and Avitec have merged to form Axell Wireless
AXELL WIRELESS UK
Aerial House
Asheridge Road
Chesham, Buckinghamshire
HP5 2QD, United Kingdom
Tel: + 44 (0) 1494 777000
Fax: + 44 (0) 1494 777002
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 1 of 148
info@axellwireless.com
www.axellwireless.com
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AXELL WIRELESS SWEDEN
Box 7139
174 07 Sundbyberg
Sweden
Tel: + 46 (0) 8 475 4700
Fax: + 46 (0) 8 475 4799
Table of Contents
1. INTRODUCTION.......................................................................................................................... 7
1.1. Scope and Purpose of Document............................................................................................. 7
1.2. Limitation of Liability Notice ...................................................................................................... 7
2. SAFETY CONSIDERATIONS ...................................................................................................... 8
2.1. Earthing of Equipment .............................................................................................................. 8
2.2. Electric Shock Hazard...............................................................................................................8
2.3. RF Radiation Hazard ................................................................................................................ 8
2.4. Lifting and other Health and Safety Recommendations............................................................ 8
2.5. Chemical Hazard ...................................................................................................................... 9
2.6. Laser safety .............................................................................................................................. 9
2.7. Emergency Contact Numbers...................................................................................................9
3. IN-LINE BDA WALL MOUNT 80-301401................................................................................... 10
3.1. In-Line BDA Wall Mount 80-301401 Specification.................................................................. 11
3.1.1. In-Line BDA Wall Mount 80-301401 Overall system Diagram.......................................... 12
3.2. In-Line BDA Wall Mount 80-301401 List of Major Components .............................................13
3.3. Combiner 80-301402 .............................................................................................................. 13
3.3.1. Combiner 80-301402 System Diagram ............................................................................ 14
3.3.2. Combiner 80-301402 Outline Drawing .............................................................................15
3.3.3. Combiner 80-301402 Specification .................................................................................. 16
3.3.4. Combiner 80-301402 Photographs .................................................................................. 17
3.3.4.1. Front View.................................................................................................................. 17
3.3.4.2. Underside view showing RF connectors.................................................................... 18
3.3.4.3. Interior view ...............................................................................................................19
3.3.5. Combiner 80-301402 Major Sub-Components................................................................. 20
3.3.5.1. Bandpass Filter 02-010701........................................................................................ 20
3.3.5.2. Bandpass Filter 02-010901........................................................................................ 20
3.3.5.3. Crossband Splitter/Coupler 550/800MHz (07-004815).............................................. 21
3.3.5.4. Crossband Splitter/Coupler VHF/UHF (07-005754)................................................... 21
3.3.5.5. 30dB Directional Coupler (07-018005) ...................................................................... 22
3.3.5.6. 30dB Bi-Directional Coupler (07-022005).................................................................. 23
3.4. VHF/UHF BDA Unit (80-301403) ............................................................................................24
3.4.1. VHF/UHF BDA Unit (80-301403) System Diagram.......................................................... 25
3.4.2. VHF/UHF BDA Unit (80-301403) Outline Drawing........................................................... 26
3.4.3. VHF/UHF BDA Unit(80-301403) Specification ................................................................. 27
3.4.4. VHF/UHF BDA Unit(80-301403) Photographs ................................................................. 28
3.4.4.1. Front View.................................................................................................................. 28
3.4.4.2. Underside view showing connectors ......................................................................... 29
3.4.4.3. Interior view ...............................................................................................................30
3.4.5. VHF/UHF BDA Unit(80-301403) Major Sub-components ................................................31
3.4.5.1. Bandpass Filter (01-002503) ..................................................................................... 31
3.4.5.2. 30dB Directional Coupler (07-002908) ...................................................................... 32
3.4.5.3. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ............................................... 32
3.4.5.4. Low Noise Amplifier (11-005401) .............................................................................. 33
3.4.5.5. TETRA Power Amplifier 20W (12-016301) ................................................................ 34
3.4.5.6. TETRA Power Amplifier 5W (12-021601) .................................................................. 35
3.4.5.7. Low Power Amplifier (1Watt) (12-021801)................................................................. 36
3.4.5.8. VHF Power Amplifier 5W (12-025602)....................................................................... 37
3.4.5.9. Automatic Gain Control.............................................................................................. 38
3.4.5.10. 24V Relay Dual Assembly (20-001602) ................................................................... 38
3.4.5.11. 24V Relay Assembly (80-008902) ........................................................................... 39
3.4.5.12. Dual Diode Assembly (94-100004) .......................................................................... 39
3.4.5.13. DC/DC Converter, 24V in, 12V 5A out (96-200024) ................................................ 40
3.5. UHF BDA Unit (80-301404) ....................................................................................................41
3.5.1. UHF BDA Unit (80-301404) System Diagram .................................................................. 42
3.5.2. UHF BDA Unit (80-301404) Outline Drawing ................................................................... 43
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3.5.3. UHF BDA Unit (80-301404) Specification ........................................................................ 44
3.5.4. UHF BDA Unit (80-301404) Photographs ........................................................................ 45
3.5.4.1. Front View.................................................................................................................. 45
3.5.4.2. Underside view showing connectors ......................................................................... 46
3.5.4.3. Interior view ...............................................................................................................47
3.5.5. UHF BDA Unit (80-301404) Major Sub-components ....................................................... 48
3.5.5.1. 30dB Directional Coupler (07-002908) ...................................................................... 48
3.5.5.2. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ............................................... 48
3.5.5.3. Low Noise Amplifier (11-005401) .............................................................................. 49
3.5.5.4. TETRA Power Amplifier 20W (12-016301) ................................................................ 50
3.5.5.5. TETRA Power Amplifier 5W (12-021601) .................................................................. 51
3.5.5.6. Low Power Amplifier (12-021801).............................................................................. 52
3.5.5.7. DC/DC Converter, 24V in, 12V 8A out (13-003011) .................................................. 53
3.5.5.8. Automatic Gain Control.............................................................................................. 53
3.5.5.9. 24V Relay Dual Assembly (20-001602)..................................................................... 54
3.5.5.10. 24V Relay Assembly (80-008909) ........................................................................... 54
3.5.5.11. Dual Diode Assembly (94-100004) .......................................................................... 55
3.6. 800MHz BDA UNIT (80-301405) ............................................................................................ 56
3.6.1. 800MHz BDA UNIT (80-301405) System Diagram .......................................................... 57
3.6.2. 800MHz BDA UNIT (80-301405) Outline Drawing ........................................................... 58
3.6.3. 800MHz BDA UNIT (80-301405) Specification ................................................................ 59
3.6.4. 800MHz BDA UNIT (80-301405) Photographs ................................................................ 60
3.6.4.1. Front View.................................................................................................................. 60
3.6.4.2. Underside view showing connectors ......................................................................... 60
3.6.4.3. Interior view ...............................................................................................................61
3.6.5. 800MHz BDA UNIT (80-301405) Major Sub-components................................................ 62
3.6.5.1. Bandpass Filter (02-011601) ..................................................................................... 62
3.6.5.2. Splitter/Combiner (05-002602) .................................................................................. 63
3.6.5.3. 30dB Directional Coupler (07-002907) ...................................................................... 63
3.6.5.4. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ............................................... 64
3.6.5.5. Low Noise Amplifier (11-005902) .............................................................................. 64
3.6.5.6. 5W Power Amplifier (12-018601)............................................................................... 65
3.6.5.7. 20W Power Amplifier (12-020501)............................................................................. 66
3.6.5.8. Automatic Gain Control.............................................................................................. 67
3.6.5.9. 24V Relay Dual Assembly (20-001602)..................................................................... 67
3.6.5.10. Dual Diode Assembly (94-100004) .......................................................................... 68
3.6.5.11. DC/DC Converter, 24V in, 12V 5A out (96-200024) ................................................ 68
4. IN-LINE BDA RACK MOUNT 80-301406................................................................................... 69
4.1. In-Line BDA Rack Mount System Diagrams ...........................................................................71
4.1.1. Overall System Diagram....................................................................................................... 71
4.1.2. Combiners System Diagram.................................................................................................72
4.2. In-Line BDA Rack Mount 80-301406 Specification................................................................. 73
4.3. In-Line BDA Rack Mount 80-301406 Illustrations................................................................... 74
4.3.1. Rack 1 Front View ................................................................................................................74
4.3.2. Rack 1 Rear View............................................................................................................. 75
4.3.3. Rack 2 Front View ............................................................................................................76
4.3.4. Rack 2 Rear View............................................................................................................. 77
4.3.5. Rack 1 Top View .............................................................................................................. 78
4.3.6. Rack 2 Top View .............................................................................................................. 79
4.4. In-Line BDA Rack Mount 80-301401 List of Major Components ............................................ 80
4.5. Downlink Input Shelf 80-301407............................................................................................. 81
4.5.1. Downlink Input Shelf 80-301407 System Schematic............................................................ 81
4.5.2. Downlink Input Shelf 80-301407 Outline Drawing................................................................ 82
4.5.3. Downlink Input Shelf 80-301407 Specification .................................................................83
4.5.4. Downlink Input Shelf 80-301407 Illustrations ................................................................... 83
4.5.4.1. Rear View .................................................................................................................. 83
4.5.5. Downlink Input Shelf 80-301407 Major Sub Components.................................................... 84
4.5.5.1. Bandpass Filter (02-010701) ..................................................................................... 84
4.5.5.2. Bandpass Filter 02-010901........................................................................................ 84
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4.5.5.3. Crossband Splitter/Coupler 550/800MHz (07-004815).............................................. 85
4.5.5.4. Crossband Splitter/Coupler VHF/UHF (07-005754)................................................... 85
4.5.5.5. 30dB Bi-Directional Coupler (07-022005).................................................................. 86
4.6. Downlink Output Shelf 80-301408 .......................................................................................... 87
4.6.1. Downlink Output Shelf 80-301408 System Schematic ........................................................87
4.6.2. Downlink Output Shelf 80-301408 Outline Drawing ............................................................ 88
4.6.3. Downlink Output Shelf 80-301408 Specification .............................................................. 89
4.6.4. Downlink Output Shelf 80-301408 Illustrations ................................................................89
4.6.4.1. Rear View .................................................................................................................. 89
4.6.5. Downlink Output Shelf 80-301408 Major Sub Components............................................. 90
4.6.5.1. 30dB Directional Coupler (07-018005) ...................................................................... 90
4.7. Uplink Input Shelf 80-301407..................................................................................................91
4.7.1. Uplink Input Shelf 80-301407 System Schematic ............................................................ 91
4.7.2. Uplink Input Shelf 80-301407 Outline Drawing ................................................................92
4.7.3. Uplink Input Shelf 80-301407 Specification...................................................................... 92
4.7.4. Uplink Input Shelf 80-301407 Illustrations........................................................................ 92
4.7.4.1. Rear View .................................................................................................................. 92
4.7.5. Uplink Input Shelf 80-301407 Major Sub Components .................................................... 93
4.8. Uplink Output Shelf 80-301407...............................................................................................94
4.8.1. Uplink Output Shelf 80-301407 System Schematic ......................................................... 94
4.8.2. Uplink Output Shelf 80-301407 Outline Drawing.............................................................. 95
4.8.3. Uplink Output Shelf 80-301407 Specification................................................................... 95
4.8.4. Uplink Output Shelf 80-301407 Illustrations .....................................................................95
4.8.4.1. Rear View .................................................................................................................. 95
4.8.5. Uplink Output Shelf 80-301407 Major Sub Components ................................................. 96
4.9. VHF Amplifier Shelf 80-301409 ..............................................................................................97
4.9.1. VHF Amplifier Shelf 80-301409 System Diagram ............................................................ 98
4.9.2. VHF Amplifier Shelf 80-301409 Outline Drawing ............................................................. 99
4.9.3. VHF Amplifier Shelf 80-301409 Specification ................................................................100
4.9.4. VHF Amplifier Shelf 80-301409 Illustrations................................................................... 100
4.9.4.1. Front View................................................................................................................ 100
4.9.4.2. Rear View ................................................................................................................ 101
4.9.5. VHF Amplifier Shelf 80-301409 Major Sub Components ............................................... 101
4.9.5.1. Bandpass Filter (01-002503) ................................................................................... 102
4.9.5.2. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ............................................. 102
4.9.5.3. VHF Power Amplifier 5W (12-025602)..................................................................... 103
4.9.5.4. Automatic Gain Control............................................................................................ 104
4.9.5.5. 24V Relay Dual Assembly (20-001602)................................................................... 105
4.9.5.6. Dual Diode Assembly (94-100004).......................................................................... 105
4.10. UHF Lowband Amplifier Shelf 80-301410 .........................................................................106
4.10.1. UHF Lowband Amplifier Shelf 80-301410 System Diagram ....................................... 107
4.10.2. UHF Lowband Amplifier Shelf 80-301410 Outline Drawing ........................................ 108
4.10.3. UHF Lowband Amplifier Shelf 80-301410 Specification .............................................109
4.10.4. UHF Lowband Amplifier Shelf 80-301410 Illustrations................................................ 109
4.10.4.1. Front View ..............................................................................................................109
4.10.4.2. Rear View............................................................................................................... 110
4.10.5. UHF Lowband Amplifier Shelf 80-301410 Major Sub Components ............................ 110
4.10.5.1. 30dB Directional Coupler (07-002908)................................................................... 111
4.10.5.2. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ........................................... 111
4.10.5.3. Low Noise Amplifier (11-005401)........................................................................... 112
4.10.5.4. TETRA Power Amplifier 20W (12-016301) ............................................................113
4.10.5.5. TETRA Power Amplifier 5W (12-021601) ..............................................................114
3.10.5.6. Low Power Amplifier (1Watt) (12-021801) ............................................................. 115
4.10.5.7. Automatic Gain Control ..........................................................................................116
4.10.5.8. 24V Relay Dual Assembly (20-001602) ................................................................. 117
4.10.5.9. 12V Relay Assembly 80-008909............................................................................ 117
4.10.5.10. Dual Diode Assembly (94-100004) ...................................................................... 118
4.10.5.11. DC/DC Converter, 24V in, 12V 5A out (96-200024) ............................................ 118
4.11. UHF Midband Amplifier Shelf 80-301410 .......................................................................... 119
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4.11.1. UHF Lowband Amplifier Shelf 80-301410 System Diagram ....................................... 120
4.11.2. UHF Midband Amplifier Shelf 80-301410 Outline Drawing .........................................120
4.11.3. UHF Midband Amplifier Shelf 80-301410 Specification .............................................. 120
4.11.4. UHF Lowband Amplifier Shelf 80-301410 Illustrations................................................ 120
4.11.4.1. Front View ..............................................................................................................120
4.11.4.2. Rear View............................................................................................................... 121
4.11.5. UHF Midband Amplifier Shelf 80-301410 Major Sub Components............................. 121
4.12. UHF Highband Amplifier Shelf 80-301410......................................................................... 122
4.12.1. UHF Highband Amplifier Shelf 80-301410 System Diagram ...................................... 123
4.12.2. UHF Highband Amplifier Shelf 80-301410 Outline Drawing .......................................123
4.12.3. UHF Highband Amplifier Shelf 80-301410 Specification............................................. 123
4.12.4. UHF Highband Amplifier Shelf 80-301410 Illustrations............................................... 123
4.12.4.1. Front View ..............................................................................................................123
4.12.4.2. Rear View............................................................................................................... 124
4.12.5. UHF Highband Amplifier Shelf 80-301410 Major Sub Components ........................... 124
4.13. 800MHz Amplifier Shelf 80-301411................................................................................... 125
4.13.1. 800MHz Amplifier Shelf 80-301411 System Diagram................................................. 126
4.13.2. 800MHz Amplifier Shelf 80-301411 Outline Drawing.................................................. 127
4.13.3. 800MHz Amplifier Shelf 80-301411 Specification ....................................................... 128
4.13.4. 800MHz Amplifier Shelf 80-301411 Illustrations ......................................................... 128
4.13.4.1. Front View ..............................................................................................................128
4.13.4.2. Rear View............................................................................................................... 129
4.13.5. 800MHz Amplifier Shelf 80-301411 Major Sub Components...................................... 129
4.13.5.1. Bandpass Filter (02-011601).................................................................................. 130
4.13.5.2. Splitter/Combiner (05-002602)............................................................................... 130
4.13.5.3. 30dB Directional Coupler (07-002907)................................................................... 131
4.13.5.4. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ........................................... 131
4.13.5.5. Low Noise Amplifier (11-005902)........................................................................... 132
4.13.5.6. 5W Power Amplifier (12-018601) ...........................................................................133
4.13.5.7. 20W Power Amplifier (12-020501) .........................................................................134
4.13.5.8. Automatic Gain Control ..........................................................................................135
4.13.5.9. 24V Relay Dual Assembly (20-001602) ................................................................. 136
4.13.5.10. Dual Diode Assembly (94-100004) ...................................................................... 136
4.13.5.11. DC/DC Converter, 24V in, 12V 5A out (96-200024) ............................................ 136
4.14 PSU 96-300064 ................................................................................................................137
5. INSTALLATION........................................................................................................................ 138
5.1 Installation Record ................................................................................................................ 138
5.2 General Remarks.................................................................................................................. 138
5.3 Electrical Connections .......................................................................................................... 138
5.4 RF Connections .................................................................................................................... 138
5.5 Optical Connections.............................................................................................................. 138
5.6 Commissioning ..................................................................................................................... 139
6. MAINTENANCE .......................................................................................................................140
6.1 Fault Finding ......................................................................................................................... 140
6.1.1 Quick Fault Checklist...................................................................................................... 140
6.1.2 Fault Isolation ................................................................................................................. 140
6.1.3 Downlink .........................................................................................................................140
6.1.4 Uplink ............................................................................................................................. 141
6.1.5 Checking service ............................................................................................................ 141
6.1.6 Fault repair .....................................................................................................................141
6.1.7 Service Support ..............................................................................................................141
6.2 Tools & Test Equipment........................................................................................................ 142
6.3 Care of Modules.................................................................................................................... 142
6.3.1 General Comments ........................................................................................................142
6.3.2 Module Removal (LNAs, general procedure) ................................................................. 142
6.3.3 Module Replacement (general) ...................................................................................... 142
6.3.4 Power Amplifiers ............................................................................................................ 142
6.3.5 Low Power Amplifier Replacement ................................................................................ 143
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6.3.6 Module Transportation ................................................................................................... 143
APPENDIX A .....................................................................................................................................144
A.1. Glossary of Terms used in this document ......................................................................... 144
A.2. Key to Drawing Symbols used in this document................................................................ 145
A.3. EC Declaration of Conformity ............................................................................................ 146
A.4. Amendment List Record Sheet.......................................................................................... 147
APPENDIX B .....................................................................................................................................148
B.1. INITIAL EQUIPMENT SET-UP CALCULATIONS ............................................................. 148
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1. INTRODUCTION
1.1. Scope and Purpose of Document
This handbook is for use solely with the equipment identified by the Axell Wireless Limited (AWL) Part
Number shown on the front cover. It is not to be used with any other equipment unless specifically
authorised by AWL. This is a controlled release document and, as such, becomes a part of the Axell
Wireless Total Quality Management System. Alterations and modification may therefore only be
performed by Axell Wireless.
AWL recommends that the installer of this equipment familiarise themselves with the safety and
installation procedures contained within this document before installation commences.
The purpose of this handbook is to provide the user/maintainer with sufficient information to service
and repair the equipment to the level agreed. Maintenance and adjustments to any deeper level must
be performed by AWL, normally at the company’s repair facility in Chesham, England.
This handbook has been prepared in accordance with BS 4884, and AWL’s Quality procedures, which
maintain the company’s registration to BS EN ISO 9001:2000 and to the R&TTE Directive of the
European Parliament. Copies of the relevant certificates and the company Quality Manual can be
supplied on application to the Quality Manager.
This document fulfils the relevant requirements of Article 6 of the R&TTE Directive.
1.2. Limitation of Liability Notice
This manual is written for the use of technically competent operators/service persons. No liability is
accepted by AWL for use or misuse of this manual, the information contained therein, or the
consequences of any actions resulting from the use of the said information, including, but not limited
to, descriptive, procedural, typographical, arithmetical, or listing errors.
Furthermore, AWL does not warrant the absolute accuracy of the information contained within this
manual, or its completeness, fitness for purpose, or scope.
AWL has a policy of continuous product development and enhancement, and as such, reserves the
right to amend, alter, update and generally change the contents, appearance and pertinence of this
document without notice.
All AWL products carry a twelve month warranty from date of shipment. The warranty is expressly on
a return to base repair or exchange basis and the warranty cover does not extend to on-site repair or
complete unit exchange.
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2. SAFETY CONSIDERATIONS
2.1. Earthing of Equipment
Equipment supplied from the mains must be connected to grounded outlets and earthed
in conformity with appropriate local, national and international electricity supply and
safety regulations.
2.2. Electric Shock Hazard
The risk of electrical shocks due to faulty mains driven power supplies whilst
potentially ever present in any electrical equipment, would be minimised by adherence
to good installation practice and thorough testing at the following stages:
a) Original assembly.
b) Commissioning..
c) Regular intervals, thereafter.
All test equipment must be in good working order prior to its use. High current power supplies can be
dangerous because of the possibility of substantial arcing. Always switch off during disconnection and
reconnection.
2.3. RF Radiation Hazard
RF radiation, (especially at UHF frequencies) arising from transmitter outputs
connected to AWL’s equipment, must be considered a safety hazard.
This condition might only occur in the event of cable disconnection, or because a
‘spare’ output has been left un-terminated. Either of these conditions would impair the
system’s efficiency. No investigation should be carried out until all
removed. This would always be a wise precaution, despite the severe mismatch between the
impedance of an N type connector at 50, and that of free space at 377, which would severely
mitigate against the efficient radiation of RF power. Radio frequency burns could also be a hazard, if
any RF power carrying components were to be carelessly touched!
Antenna positions should be chosen to comply with requirements (both local & statutory) regarding
exposure of personnel to RF radiation. When connected to an antenna, the unit is capable of
producing RF field strengths, which may exceed guideline safe values especially if used with
antennas having appreciable gain. In this regard the use of directional antennas with backscreens
and a strict site rule that personnel must remain behind the screen while the RF power is on, is
strongly recommended.
Where the equipment is used near power lines or in association with temporary masts not having
lightning protection, the use of a safety earth connected to the case-earthing bolt is strongly advised.
RF power sources have been
2.4. Lifting and other Health and Safety Recommendations
Certain items of AWL equipment are heavy and care should be taken when lifting them
by hand. Ensure that a suitable number of personnel, appropriate lifting apparatus
and appropriate personal protective equipment is used especially when installing Cell
Enhancers above ground e.g. on a mast or pole.
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2.5. Chemical Hazard
Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes
used in devices within equipment produced by Axell Wireless Ltd. Beryllium oxide dust
can be toxic if inhaled, leading to chronic respiratory problems. It is harmless if
ingested or by contact.
Products that contain beryllium are load terminations (dummy loads) and some power amplifiers.
These products can be identified by a yellow and black “skull and crossbones” danger symbol (shown
above). They are marked as hazardous in line with international regulations, but pose no threat under
normal circumstances. Only if a component containing beryllium oxide has suffered catastrophic
failure, or exploded, will there be any danger of the formation of dust. Any dust that has been created
will be contained within the equipment module as long as the module remains sealed. For this reason,
any module carrying the yellow and black danger sign should not be opened. If the equipment is
suspected of failure, or is at the end of its life-cycle, it must be returned to Axell Wireless Ltd. for
disposal.
To return such equipment, please contact the Quality Department, who will give you a Returned
Materials Authorisation (RMA) number. Please quote this number on the packing documents, and on
all correspondence relating to the shipment.
PolyTetraFluoroEthylene, (P.T.F.E.) and P.T.F.E. Composite Materials
Many modules/components in AWL equipment contain P.T.F.E. as part of the RF insulation barrier.
This material should never be heated to the point where smoke or fumes are evolved. Any person
feeling drowsy after coming into contact with P.T.F.E. especially dust or fumes should seek medical
attention.
2.6. Laser safety
General good working practices adapted from
EN60825-2: 2004/ EC 60825-2:2004
Do not stare with unprotected eyes or with any unapproved optical device at the fibre
ends or connector faces or point them at other people, Use only approved filtered or attenuating
viewing aids.
Any single or multiple fibre end or ends found not to be terminated (for example, matched, spliced)
shall be individually or collectively covered when not being worked on. They shall not be readily
visible and sharp ends shall not be exposed.
When using test cords, the optical power source shall be the last connected and the first
disconnected; use only approved methods for cleaning and preparing optical fibres and optical
connectors.
Always keep optical connectors covered to avoid physical damage and do not allow any dirt/foreign
material ingress on the optical connector bulkheads.
The optical fibre jumper cable maximum bend radius is 3cm; any smaller radii may result in optical
cable breakage or excessive transmission losses.
Caution: The FO units are NOT
weather proof.
2.7. Emergency Contact Numbers
The AWL Quality Department can be contacted on:
Telephone +44 (0)1494 777000
Fax. +44 (0)1494 777002
e-mail
qa@axellwireless.com
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 9 of 148
L.A. M.T.A. Remote Sites
3. In-Line BDA Wall Mount 80-301401
The wall mount In Line BDA consists of 4 wall mount enclosures:
80-301402 the Combiner unit.
80-301403 which houses the VHF and UHF Low Band amplification modules.
80-301404 which houses the Mid and High band UHF amplification modules.
80-301405 which houses the 800MHz amplification modules.
Downlink
The downlink signal is received from the leaky feeder and enters the Combiner 80-301402 where by
means of crossband splitter/couplers it is split into VHF, UHF and 800MHz paths, the UHF path is
further split into Low, Middle and Highband paths.
The VHF and UHF Lowband paths then leave Combiner 80-301402 and enters VHF/UHF BDA Unit
80-301403,
The UHF Mid and Highband paths leaves Combiner 80-301402 and enters UHF BDA Unit 80-301404
The 800MHz path leaves Combiner 80-301402 and enters 800MHz BDA Unit 80-301405
After being amplified the Downlink signals from the three BDA units then re-enter Splitter/Combiner
80-301402 where they are combined into a single path and fed into the leaky feeder.
Uplink
The Uplink signal signal is received from the leaky feeder and enters the Splitter/Combiner 80-301402
where by means of crossband splitter/couplers it is split into VHF, UHF and 800MHz paths, the UHF
path is further split into Low, Middle and Highband paths.
The VHF and UHF Low band paths then leave Splitter/Combiner 80-301402 and enters VHF/UHF
BDA Unit 80-301403,
The UHF Mid and Highband paths leaves Splitter/Combiner 80-301402 and enters UHF BDA Unit 80301404
The 800MHz path leaves Splitter/Combiner 80-301402 and enters 800MHz BDA Unit 80-301405
After being amplified the Uplink signals from the three BDA units then re-enter Splitter/Combiner 80301402 where they are combined into a single path and fed into the leaky feeder.
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 10 of 148
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3.1. In-Line BDA Wall Mount 80-301401 Specification
ELECTRICAL SPECIFICATION
VHF
UHF Low
Frequency
Range
Downlink Power
Uplink Power
Environmental/Mechanical Specification
(excludes handles and connectors)
UHF Mid
UHF High
800MHz
Passband Ripple ± 1.5dB
Amplifier
Amplifier
Power Consumption < 800 Watts
Alarm Interfaces
Downlink 154.0 to 161.5 MHz
Uplink 155.5 to 161.0 MHz
Downlink 460.4 to 460.5 MHz
Uplink 465.4 to 465.5 MHz
Downlink 482.5 to 483.8 MHz
Uplink 485.7 to 486.8 MHz
Downlink 507.0 to 507.3 MHz
Uplink 510.0 to 510.3 MHz
Downlink 856.0 to 861.0 MHz
Uplink 811.0 to 816.0 MHz
VHF 5 Watts
UHF Low 20 Watts
UHF Mid 20 Watts
UHF High 20 Watts
800MHz 40 Watts
VHF 5 Watts
UHF Low 5 Watts
UHF Mid 5 Watts
UHF High 5 Watts
800MHz 5 Watts
Gain 30dB
Gain Adjust 0 - 30dB in 2dB Steps
Sampling Ports 30dB
VSWR 1.5:1
Impedance 50 Ohms
Power Supply 24V DC
Mechanical IP65 Wall Mount
Dimensions
RF Connectors N-Type Female
Qty. 4 off,
620mm x 620mm x 250mm
(24” x 24” x 10” approx)
Local Alarms to SCADA
Dry Contact with LED Indication per
band path
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 11 of 148
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3.1.1. In-Line BDA Wall Mount 80-301401 Overall system Diagram
Drawing Number 80-301481
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 12 of 148
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3.2. In-Line BDA Wall Mount 80-301401 List of Major Components
Section Component
Part
3.3. 80-301402 Combiner 1
3.4. 80-301403 VHF/UHF BDA Unit 1
3.5. 80-301404 UHF BDA Unit 1
3.6. 80-301405 800MHz BDA Unit 1
Component Part Description Qty Per
Assembly
3.3. Combiner 80-301402
Splitter/Combiner 80-301402 is the main Splitter/Combiner unit. Signals are received from the leaky
feeder and are then split into their various separate paths before being amplified by external band
specific amplifiers and then the signals are re-combined for onward transmission via the leaky feeder
The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx)
Downlink signals are received at the port labelled “DOWNLINK INPUT” (Annotated AA in the picture
in section 3.3.4.2.) and there is a 30dB test port labelled “DOWNLINK INPUT TEST PORT” (Z in
section 3.3.4.2.).
Ports labelled 1 to 5 (P to T in section 3.3.4.2.) are the Downlink outputs to the amplification stages
and ports labelled A to E (A to E in section 3.3.4.2.) are the Downlink inputs from the amplification
stages. These outputs and inputs are further described below.
The Downlink signal leaves the Splitter/Combiner for the leaky feeder via the port labelled
“DOWNLINK OUTPUT” (L in section 3.3.4.2.) and there is a 30dB test port labelled “DOWNLINK
OUTPUT TEST PORT” (K in section 3.3.4.2.).
Uplink signals are received at the port labelled “UPLINK INPUT” (N in section 3.3.4.2.) and there is a
30dB test port labelled “UPLINK INPUT TEST PORT” (M in section 3.3.4.2.).
Ports labelled F to J (F to J in section 3.3.4.2.) are the Uplink outputs to the amplification stages and
ports labelled 6 to 10 (U to Y in section 3.3.4.2.) are the Uplink inputs from the amplification stages.
These outputs and inputs are further described below.
The Uplink signal leaves the Splitter/Combiner for the leaky feeder via the port labelled “UPLINK
OUTPUT” (CC in section 3.3.4.2.) and there is a 30dB test port labelled “UPLINK OUTPUT TEST
PORT” (BB in section 3.3.4.2.).
Splitter/Combiner 80-301402 also incorporates bandpass filtering for the three UHF bands, the filters
are placed in the RF path before the outputs to and after the inputs from the external amplification
stages
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 13 of 148
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3.3.1. Combiner 80-301402 System Diagram
Drawing Number 80-301482
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 14 of 148
L.A. M.T.A. Remote Sites
3.3.2. Combiner 80-301402 Outline Drawing
Drawing Number 80-301492
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 15 of 148
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Downlink
3.3.3. Combiner 80-301402 Specification
PARAMETER SPECIFICATION
Insertion Loss from Downlink Input port to port indicated
VHF Band to port 1 < 1.0dB at 154.0 – 161.3MHz
UHF Low Band to port 2 < 3.5dB at 460.4 – 460.5MHz
UHF Mid Band to port 3 < 3.5dB at 482.5 -483.8MHz
UHF High Band to port 4 < 4.0dB at 507.0 – 507.3MHz
800MHz Band to port 5 < 1.0dB at 856.0 – 861.0MHz
Insertion Loss from port indicated to Downlink Input test port
VHF Band 30dB at 154.0 – 161.3MHz
UHF Low Band 30dB at 460.4 – 460.5MHz
UHF Mid Band 30dB at 482.5 – 483.8MHz
UHF High Band 30dB at 507.0 – 507.3MHz
800MHz Band 30dB at 856.0 – 861.0MHz
Insertion Loss from port indicated to Downlink Output
VHF Band from port A < 1.0dB at 154.0 – 161.3MHz
UHF Low Band from port B < 3.5dB at 460.4 – 460.5MHz
UHF Mid Band from port C < 3.5dB at 482.5 -483.8MHz
UHF High Band from port D < 4.0dB at 507.0 – 507.3MHz
800MHz Band from port E < 1.0dB at 856.0 – 861.0MHz
Insertion Loss from port indicated to Downlink Output Test port
VHF Band from port A 31.0dB at 154.0 – 161.3MHz
UHF Low Band from port B 33dB at 460.4 – 460.5MHz
UHF Mid Band from port C 33dB at 482.5 – 483.8MHz
UHF High Band from port D 33dB at 507.0 – 507.3MHz
800MHz Band from port E 31dB at 856.0 – 861.0MHz
Uplink
PARAMETER SPECIFICATION
Insertion Loss from from Uplink Input port to port indicated
VHF Band to port F < 1.0dB at 155.7 – 160.8MHz
UHF Low Band to port G < 3.5dB at 465.4 – 465.5MHz
UHF Mid Band to port H < 3.5dB at 485.7 -486.8MHz
UHF High Band to port I < 4.0dB at 510.0 – 510.3MHz
800MHz Band to port J < 1.0dB at 811.0 – 816.0MHz
Insertion Loss from port indicated to Uplink Input test port
VHF Band 31dB at 155.7 – 160.8MHz
UHF Low Band 33dB at 465.4 – 465.5MHz
UHF Mid Band 33dB at 485.7 – 486.8MHz
UHF High Band 33dB at 510.0 – 510.3MHz
800MHz Band 31dB at 811.0 – 816.0MHz
Insertion Loss from port indicated to Uplink Output
VHF Band from port 6 < 1.0dB at 155.7 – 160.8MHz
UHF Low Band from port 7 < 3.5dB at 465.4 – 465.5MHz
UHF Mid Band from port 8 < 3.5dB at 485.7 -486.8MHz
UHF High Band from port 9 < 4.0dB at 510.0 – 510.3MHz
800MHz Band from port 10 < 1.0dB at 811.0 – 816.0MHz
Insertion Loss from port indicated to Uplink Output Test port
VHF Band from port 6 31dB at 155.7 – 160.8MHz
UHF Low Band from port 7 33dB at 465.4 – 465.5MHz
UHF Mid Band from port 8 33dB at 485.7 – 486.8MHz
UHF High Band from port 9 33dB at 510.0 – 510.3MHz
800MHz Band from port 10 31dB at 811.0 – 816.0MHz
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 16 of 148
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Environmental/Mechanical Specification
PARAMETER SPECIFICATION
RF connectors N type female
(excludes handles and connectors
3.3.4. Combiner 80-301402 Photographs
3.3.4.1. Front View
Mechanical IP65 Wall Mount
Dimensions
620mm x 620mm x 250mm
(24” x 24” x 10” approx)
Note: All connectors are on the underside
A Lockable Door Handles
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 17 of 148
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3.3.4.2. Underside view showing RF connectors
A Port A. Downlink VHF Input from VHF/UHF BDA Unit 80-301403
B Port B. Downlink UHF Lowband Input from VHF/UHF BDA Unit 80-301403
C Port C. Downlink UHF Midband Input from UHF BDA Unit 80-301404
D Port D. Downlink UHF Highband Input from UHF BDA Unit 80-301404
E Port E. Downlink 800MHz Input from 800MHz BDA Unit 80-301405
F Port F. Uplink VHF Output to VHF/UHF BDA Unit 80-301403
G Port G. Uplink UHF Lowband Output to VHF/UHF BDA Unit 80-301403
H Port H. Uplink UHF Midband Output to UHF BDA Unit 80-301404
I Port I. Uplink UHF Highband Output to UHF BDA Unit 80-301404
J Port J. Uplink 800MHz Output to 800MHz BDA Unit 80-301405
K Downlink Output Test Port (30dB Tap)
L Downlink Output to Radiating Cable
M Uplink Input Test Port (30dB Tap)
N Uplink Input from Radiating Cable
O Earth Connection
P Port 1. Downlink VHF Output to VHF/UHF BDA Unit 80-301403
Q Port 2. Downlink UHF Lowband Output to VHF/UHF BDA Unit 80-301403
R Port 3. Downlink UHF Midband Output to UHF BDA Unit 80-301404
S Port 4. Downlink UHF Highband Output to UHF BDA Unit 80-301404
T Port 5. Downlink 800MHz Output to 800MHz BDA Unit 80-301405
U Port 6. Uplink VHF Input from VHF/UHF BDA Unit 80-301403
V Port 7. Uplink UHF Lowband Input from VHF/UHF BDA Unit 80-301403
W Port 8. Uplink UHF Midband Input from UHF BDA Unit 80-301404
X Port 9. Uplink UHF Highband Input from UHF BDA Unit 80-301404
Y Port 10. Uplink 800MHz Input from 800MHz BDA Unit 80-301405
Z Downlink Input Test Port (30dB Tap)
AA Downlink Input from Radiating Cable
BB Uplink Output Test Port (30dB Tap)
CC Uplink Output to Radiating Cable
DD Case feet
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 18 of 148
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3.3.4.3. Interior view
A Downlink Input 30dB Bi-Directional Coupler 07-022005
B Downlink Input Crossband Splitter/Coupler 07-004815
C Downlink Input Crossband Splitter/Coupler 07-005754
D Downlink Input UHF Lowband Bandpass Filter 02-010701
E Downlink Input UHF Midband Bandpass Filter 02-010701
F Downlink Input UHF Highband Bandpass Filter 02-010901
G Downlink Output UHF Lowband Bandpass Filter 02-010701
H Downlink Output UHF Midband Bandpass Filter 02-010701
I Downlink Output UHF Highband Bandpass Filter 02-010901
J Downlink Output Crossband Splitter/Coupler 07-005754
K Downlink Output Crossband Splitter/Coupler 07-004815
L Downlink Output 30dB Coupler 07-018005
M Uplink Input 30dB Bi-Directional Coupler 07-022005
N Uplink Input Crossband Splitter/Coupler 07-004815
O Uplink Input Crossband Splitter/Coupler 07-005754
P Uplink Input UHF Lowband Bandpass Filter 02-010701
Q Uplink Input UHF Midband Bandpass Filter 02-010701
R Uplink Input UHF Highband Bandpass Filter 02-010901
S Uplink Output UHF Lowband Bandpass Filter 02-010701
T Uplink Output UHF Midband Bandpass Filter 02-01070
U Uplink Output UHF Highband Bandpass Filter 02-010901
V Uplink Output Crossband Splitter/Coupler 07-005754
W Uplink Output Crossband Splitter/Coupler 07-004815
X Uplink Output 30dB Bi-Directional Coupler 07-022005
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 19 of 148
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3.3.5. Combiner 80-301402 Major Sub-Components
Section Component
Part
3.3.5.1. 02-010701 Bandpass Filter 8
3.3.5.2. 02-010901 Bandpass Filter 4
3.3.5.3. 07-004815 Crossband Splitter/Coupler 550/800MHz 4
3.3.5.4. 07-005754 Crossband Splitter/Coupler VHF/UHF 4
3.3.5.5. 07-018005 30dB Directional Coupler 1
3.3.5.6. 07-022005 30dB Bi-Directional Coupler 3
Component Part Description Qty Per
Assembly
3.3.5.1. Bandpass Filter 02-010701
The bandpass filters are multi-section designs with a bandwidth dependent upon the passband
frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with
a passband design ripple of 0.1dB. The filters are of combline design, and are carefully aligned during
manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the
unit. The tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR
figure and 50 load at the input and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life and require
no maintenance. Should a filter be suspect, it is usually most time efficient to replace the module
rather than attempt repair or re-tuning.
02-010701 Specification
PARAMETER SPECIFICATION
Downlink 460.4 to 460.5 MHz
Uplink 465.4 to 465.5 MHz
Downlink 482.5 to 483.8 MHz
Uplink 485.7 to 486.8 MHz
UHF Low 0.1 MHz
UHF Mid 1.3 MHz
Insertion loss 2.4 dB (typical)
VSWR better than 1.2:1
Connectors SMA
operation -20°C to +60°C Temperature
storage -40°C to +70°C
Weight 3 kg (typical)
Passband
Frequency
Bandwidth
UHF Low
UHF Mid
Number of sections 5
Power Handling 100W max
range
3.3.5.2. Bandpass Filter 02-010901
Bandpass Filter 02-010901 is a multi-section design with a bandwidth dependent upon the passband
frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with
a passband design ripple of 0.1dB. The filters are of helical & combline design respectively, and are
carefully aligned during manufacture in order to optimise the insertion loss, VSWR and
intermodulation characteristics of the unit. The body and tuned elements are silver-plated to reduce
surface ohmic losses and maintain a good VSWR figure and 50 load at the input and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life and require
no maintenance.
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02-010901 specification
SPECIFICATION PARAMETER
Downlink 507.0 to 507.3MHz Passband
Frequency
Bandwidth
Insertion Loss 2.9 dB (typical)
Power Rating 50W
Uplink 510.0 to 510.3MHz
Uplink 0.3 MHz
Downlink 0.3 MHz
Impedance 50ȍ
VSWR Better than 1.2:1
Connectors SMA
Weight 3Kg (approximately)
3.3.5.3. Crossband Splitter/Coupler 550/800MHz (07-004815)
The purpose of Crossband Splitter/Coupler (07-004815) is to split or combine RF signals from
different parts of the frequency spectrum.
It is a 3 port device comprising two filters, one a low pass, the other a high pass, connected to a
common input/output. The couplers are housed in a machined aluminium casing having a centre
screening wall between the filter sections and lid secured by screws at frequent intervals over its
perimeter to obtain a tight seal and to ensure linearity and stability of response.
07-004815 Specification
Parameter Low Pass Port High Pass Port
Passband Frequencies 380 to 550MHz 800 to 960MHz
Insertion loss <0.5dB <0.5dB
Isolation between Bands >50dB >50dB
VSWR 1.3:1
Impedance 50 ohm
Power rating 50W
Temperature
range
operation
storage
RF Connectors SMA (female)
Weight <1kg
-20C to +60C
-40C to +70C
3.3.5.4. Crossband Splitter/Coupler VHF/UHF (07-005754)
The purpose of Crossband Splitter/Coupler (07-005754) is to split or combine RF signals from
different parts of the frequency spectrum.
It is a 3 port device comprising two filters, one a low pass, the other a high pass, connected to a
common input/output. The couplers are housed in a machined aluminium casing having a centre
screening wall between the filter sections and lid secured by screws at frequent intervals over its
perimeter to obtain a tight seal and to ensure linearity and stability of response.
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07-005754 Specification
Parameter Low Pass Port High Pass Port
Passband Frequencies 70 to 175 MHz 380 to 500 MHz
Insertion loss <0.5dB <0.5dB
Return loss >14dB typical >14dB typical
Isolation between Bands >60dB >60dB
Impedance 50 ohm
Power rating 50W
Temperature
range
operation
storage
RF Connectors SMA (female)
Weight <1kg
-20C to +60C
-40C to +70C
3.3.5.5. 30dB Directional Coupler (07-018005)
The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from
transmission lines and to combine them, for example though splitter units for different purposes
(alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the
specified frequency range. 07-018005 is a Uni-Directional device and as such will only couple 30dB of
signal in one direction.
07-018005 Specification
PARAMETER SPECIFICATION
Mainline Insertion Loss <0.5
Power Handling (CW) 100W
Temperature
range
Frequency Range 70 MHz - 1000MHz
Coupling Loss 30 dB
VSWR Mainline Better than 1.3:1
Impedance 50 ȍ
Outline (W x D x H) 176mm x 104mm x 24mm (ex. connectors)
Connectors N (female) on all ports
Case Material Aluminium
Finish Iridite NCP
operation
storage
Ingress Protection IP54
-20C to +60C
-40C to +70C
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3.3.5.6. 30dB Bi-Directional Coupler (07-022005)
The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from
transmission lines and to combine them, for example though splitter units for different purposes
(alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the
specified frequency range. 07-022005 is a Bi-Directional device and as such will couple 30dB of
signal whichever direction the signal is traveling.
07-022005 Specification
PARAMETER SPECIFICATION
Frequency Range 100kHz – 2.7GHz
Mainline Insertion Loss < 1.0 dB
Coupling Loss 30 dB
Coupling Loss Tolerance +/-2.0 dB
VSWR Mainline Better than 1.4:1
Impedance 50 ȍ
Power Handling (CW) 5W
Outline (W x D x H) 44.5mm x 41mm x 27mm (ex. connectors)
Connectors SMA (female) on all ports
Case Material Aluminium
Finish Iridite NCP
Operating Temperature -20 to +55°C
Ingress Protection IP54
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3.4. VHF/UHF BDA Unit (80-301403)
VHF/UHF BDA Unit (80-301403) provides the amplification stages for the VHF and UHF Lowband
paths, The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx).
The Downlink VHF signal is received at the port labelled “VHF D/L INPUT” (Annotated A in the picture
in section 3.4.4.2.). The Downlink VHF path passes through a bandpass filter to remove out of band
noise and then a switched attenuator providing 0 to 30 dB of RF signal attenuation.
After leaving the attenuator the VHF Downlink signal passes through a 5W amplification stage, this
amplification stage is straddled by an Automatic Gain Control assembly providing limiting to the output
signals in the case of high input signals.
After leaving the Amplification/AGC stage the VHF Downlink signal passes through a second
bandpass filter and exits the BDA via the port labelled “VHF D/L OUTPUT” ( B in section 3.4.4.2.).
The Uplink VHF Signal is received at the port labelled “VHF U/L INPUT” (C in section 3.4.4.2.). The
VHF Uplink path passes through a bandpass filter to remove out of band noise and then a switched
attenuator providing 0 to 30 dB of RF signal attenuation.
After leaving the attenuator the VHF Uplink signal passes through a 5W amplification stage, this
amplification stage is straddled by an Automatic Gain Control assembly providing limiting to the output
signals in the case of high input signals.
After leaving the Amplification/AGC stage the VHF Uplink signal passes through a second bandpass
filter and exits the BDA via the port labelled “VHF U/L OUTPUT” (D in section 3.4.4.2.).
The Downlink UHF Lowband signal is received at the port labelled “UHF LOW D/L INPUT” (E in
section 3.4.4.2.). The signal passes through a switched attenuator providing 0 to 30 dB of RF signal
attenuation and then into the amplification stage. The Downlink UHF Lowband amplification stage is
provided by tow amplifier modules, the first is a 15dB gain Low Power Amplifier and the second is a
20W, 23dB gain power amplifier. Both amplification stages are straddled by an Automatic Gain
Control assembly providing limiting to the output signals in the case of high input signals.
The input to the AGC detector is provided by the output of a 30dB tap. After leaving the
Amplification/AGC stage the Downlink UHF Lowband signal exits the BDA via the port labelled “UHF
LOW D/L OUTPUT” (F in section 3.4.4.2.).
The Uplink UHF Lowband signal is received at the port labelled “UHF LOW U/L INPUT” (G in section
3.4.4.2.). The signal passes into a Low Noise Amplifier providing 15dB of gain and then into a
switched attenuator providing 0 to 30 dB of RF signal attenuation. After the attenuator the Uplink UHF
Lowband signal passes into a second stage of amplification provided by a 5W, 30dB gain Power
Amplifier, this amplification stage is straddled by an Automatic Gain Control assembly providing
limiting to the output signals in the case of high input signals.
The Uplink UHF Lowband signal exits the BDA via the port labelled “UHF LOW U/L OUTPUT” (H in
section 3.4.4.2.).
VHF/UHF BDA Unit (80-301403) is provided with a 24V DC input to power the amplifier modules
within and those amplifier modules are configured to provide alarm status reports. Separate alarm
contact outputs are provided for the VHF and the UHF Lowband paths.
Axell Wireless Limited
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3.4.1. VHF/UHF BDA Unit (80-301403) System Diagram
Drawing Number 80-301483
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 25 of 148
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3.4.2. VHF/UHF BDA Unit (80-301403) Outline Drawing
Drawing Number 80-301493
Axell Wireless Limited
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Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 26 of 148
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3.4.3. VHF/UHF BDA Unit(80-301403) Specification
Parameter Specification
Downlink
Downlink Passband
Maximun gain
Gain Adjustment
(P1dB)
ALC setting
3rd Order Intercept point
Uplink
Uplink Passband
Maximun gain
Gain Adjustment
(P1dB)
ALC setting
3rd Order Intercept point
Noise Figure
Environmental/Mechanical Specification
(excludes handles and connectors)
UHF Lowband 460.4 to 460.5MHz
UHF Lowband 30dB
UHF Lowband 0 to 30dB in 2dB steps
UHF Lowband > +42.5dBm
UHF Lowband 1dB below P1dB
UHF Lowband > +53.5dBm
UHF Lowband 465.4 – 465.5MHz
UHF Lowband 30dB
UHF Lowband 0 to 30dB in 2dB steps
UHF Lowband > +36.5dBm
UHF Lowband +27dBm
UHF Lowband > +48.0dBm
UHF Lowband < 3.0dB
Mechanical IP65 Wall Mount
Dimensions
RF Connectors N-Type Female
Alarm Interfaces
Power Supply 24V DC
VHF 154.0 to 161.5MHz
VHF 30dB
VHF 0 to 30dB in 2dB steps
VHF > +34.0dBm 1dB Compression Point
VHF 1dB below P1dB
VHF > +45.0dBm
VHF 155.5 – 161.0MHz
VHF 30dB
VHF 0 to 30dB in 2dB steps
VHF > +34.0dBm 1dB Compression Point
VHF +27dBm
VHF > +45.0dBm
VHF < 10dB
620mm x 620mm x 250mm
(24” x 24” x 10” approx)
Local Alarms to SCADA
Dry Contact with LED Indication per band
path
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 27 of 148
L.A. M.T.A. Remote Sites
3.4.4. VHF/UHF BDA Unit(80-301403) Photographs
3.4.4.1. Front View
Note: All connectors (RF, DC and Alarms) are on the underside
A Green LED “Power On”
B Red LED VHF Downlink Alarm
C Red LED VHF Uplink Alarm
D Red LED UHF Lowband Downlink Alarm
E Red LED UHF Lowband Uplink Alarm
F Lockable Door Handles
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 28 of 148
L.A. M.T.A. Remote Sites
3.4.4.2. Underside view showing connectors
A VHF Downlink Input from port 1 on Combiner 80-301402
B VHF Downlink Output to port A on Combiner 80-301402
C VHF Uplink Input from port F on Combiner 80-301402
D VHF Uplink Output to port 6 on Combiner 80-301402
E UHF Lowband Downlink Input from port 2 on Combiner 80-301402
F UHF Lowband Downlink Output to port B on Combiner 80-301402
G UHF Lowband Uplink Input from port G on Combiner 80-301402
H UHF Lowband Uplink Output to port 7 on Combiner 80-301402
I 24V DC Input
J VHF Band Alarm Output
K UHF Lowband Alarm Output
L Earth Connection
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 29 of 148
L.A. M.T.A. Remote Sites
3.4.4.3. Interior view
A VHF Downlink Filters 01-002503 (Input filter below, Output filter above)
B VHF Downlink Switched Attenuator 10-000701
C VHF Downlink AGC Attenuator 17-001201
D VHF Downlink 5W Power Amplifier 12-025602
E VHF Downlink AGC Detector 17-001101
F VHF Uplink Filters 01-002503 (Input filter below, Output filter above)
G VHF Uplink Switched Attenuator 10-000701
H VHF Uplink AGC Attenuator 17-001201
I VHF Uplink 5W Power Amplifier 12-025602
J VHF Uplink AGC Detector 17-001101
K UHF Lowband Downlink Switched Attenuator 10-000701
L UHF Lowband Downlink AGC Attenuator 17-001201
M UHF Lowband Downlink Low Power Amplifier 12-021801
N UHF Lowband Downlink 20W Power Amplifier 12-016301
O UHF Lowband Downlink 30dB Directional Coupler 07-002908
P UHF Lowband Downlink AGC Detector 17-001105
Q UHF Lowband Uplink Low Noise Amplifier 11-005401
R UHF Lowband Uplink Switched Attenuator 10-000701
S UHF Lowband Uplink AGC Attenuator 17-001201
T UHF Lowband Uplink 5W Power Amplifier 12-021601
U UHF Lowband Uplink AGC Detector 17-001101
V DC/DC Converter 96-200024
W 24V Dual Relay Assembly (VHF Alarm output) 20-001602
X 24V Dual Relay Assembly (UHF Lowband output) 20-001602
Y 24V Relay Assembly 80-008902
Z Dual Diode Assembly 94-100004
AA Main DC 10A Circuit Breaker 96-920021
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 30 of 148
L.A. M.T.A. Remote Sites
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