PBE Europe as Axell Wireless 80-3014SERIES 80-301403 Cell Enhancer User Manual

Axell Wireless 80-301403 Cell Enhancer

Manual

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Date Submitted2008-06-25 00:00:00
Date Available2008-06-25 00:00:00
Creation Date2008-06-23 14:53:20
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Document Lastmod2008-06-23 14:53:20
Document Titleuntitled

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
info@axellwireless.com
www.axellwireless.com
AXELL WIRELESS SWEDEN
Box 7139
174 07 Sundbyberg
Sweden
Tel: + 46 (0) 8 475 4700
Fax: + 46 (0) 8 475 4799
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 1 of 148
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
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 2 of 148
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
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 3 of 148
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
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 4 of 148
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
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 5 of 148
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
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 6 of 148
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.
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 7 of 148
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 RF power sources have been
removed. This would always be a wise precaution, despite the severe mismatch between the
impedance of an N type connector at 50Ÿ, and that of free space at 377Ÿ, 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.
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.
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 8 of 148
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
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
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Date 13/06/2008
Page 9 of 148
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.
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3.1.
In-Line BDA Wall Mount 80-301401 Specification
ELECTRICAL SPECIFICATION
Downlink 154.0 to 161.5 MHz
VHF
Uplink 155.5 to 161.0 MHz
Downlink 460.4 to 460.5 MHz
UHF Low
Uplink 465.4 to 465.5 MHz
Frequency
Downlink 482.5 to 483.8 MHz
UHF Mid
Range
Uplink 485.7 to 486.8 MHz
Downlink 507.0 to 507.3 MHz
UHF High
Uplink 510.0 to 510.3 MHz
Downlink 856.0 to 861.0 MHz
800MHz
Uplink 811.0 to 816.0 MHz
Passband Ripple Âą 1.5dB
VHF 5 Watts
UHF Low 20 Watts
Downlink Power
UHF Mid 20 Watts
Amplifier
UHF High 20 Watts
800MHz 40 Watts
VHF 5 Watts
UHF Low 5 Watts
Uplink Power
UHF Mid 5 Watts
Amplifier
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
Power Consumption < 800 Watts
Environmental/Mechanical Specification
Mechanical IP65 Wall Mount
Qty. 4 off,
Dimensions
620mm x 620mm x 250mm
(excludes handles and connectors)
(24” x 24” x 10” approx)
RF Connectors N-Type Female
Local Alarms to SCADA
Alarm Interfaces Dry Contact with LED Indication per
band path
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
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Date 13/06/2008
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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
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3.2.
In-Line BDA Wall Mount 80-301401 List of Major Components
Section
3.3.
3.4.
3.5.
3.6.
3.3.
Component
Part
80-301402
80-301403
80-301404
80-301405
Component Part Description
Combiner
VHF/UHF BDA Unit
UHF BDA Unit
800MHz BDA Unit
Qty Per
Assembly
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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3.3.1.
Combiner 80-301402 System Diagram
Drawing Number 80-301482
Axell Wireless Limited
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3.3.2.
Combiner 80-301402 Outline Drawing
Drawing Number 80-301492
Axell Wireless Limited
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3.3.3.
Combiner 80-301402 Specification
Downlink
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
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Environmental/Mechanical Specification
PARAMETER
Mechanical
RF connectors
Dimensions
(excludes handles and connectors
3.3.4.
3.3.4.1.
SPECIFICATION
IP65 Wall Mount
N type female
620mm x 620mm x 250mm
(24” x 24” x 10” approx)
Combiner 80-301402 Photographs
Front View
Note: All connectors are on the underside
Lockable Door Handles
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3.3.4.2.
Underside view showing RF connectors
AA
BB
CC
DD
Port A. Downlink VHF Input from VHF/UHF BDA Unit 80-301403
Port B. Downlink UHF Lowband Input from VHF/UHF BDA Unit 80-301403
Port C. Downlink UHF Midband Input from UHF BDA Unit 80-301404
Port D. Downlink UHF Highband Input from UHF BDA Unit 80-301404
Port E. Downlink 800MHz Input from 800MHz BDA Unit 80-301405
Port F. Uplink VHF Output to VHF/UHF BDA Unit 80-301403
Port G. Uplink UHF Lowband Output to VHF/UHF BDA Unit 80-301403
Port H. Uplink UHF Midband Output to UHF BDA Unit 80-301404
Port I. Uplink UHF Highband Output to UHF BDA Unit 80-301404
Port J. Uplink 800MHz Output to 800MHz BDA Unit 80-301405
Downlink Output Test Port (30dB Tap)
Downlink Output to Radiating Cable
Uplink Input Test Port (30dB Tap)
Uplink Input from Radiating Cable
Earth Connection
Port 1. Downlink VHF Output to VHF/UHF BDA Unit 80-301403
Port 2. Downlink UHF Lowband Output to VHF/UHF BDA Unit 80-301403
Port 3. Downlink UHF Midband Output to UHF BDA Unit 80-301404
Port 4. Downlink UHF Highband Output to UHF BDA Unit 80-301404
Port 5. Downlink 800MHz Output to 800MHz BDA Unit 80-301405
Port 6. Uplink VHF Input from VHF/UHF BDA Unit 80-301403
Port 7. Uplink UHF Lowband Input from VHF/UHF BDA Unit 80-301403
Port 8. Uplink UHF Midband Input from UHF BDA Unit 80-301404
Port 9. Uplink UHF Highband Input from UHF BDA Unit 80-301404
Port 10. Uplink 800MHz Input from 800MHz BDA Unit 80-301405
Downlink Input Test Port (30dB Tap)
Downlink Input from Radiating Cable
Uplink Output Test Port (30dB Tap)
Uplink Output to Radiating Cable
Case feet
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3.3.4.3.
Interior view
Downlink Input 30dB Bi-Directional Coupler 07-022005
Downlink Input Crossband Splitter/Coupler 07-004815
Downlink Input Crossband Splitter/Coupler 07-005754
Downlink Input UHF Lowband Bandpass Filter 02-010701
Downlink Input UHF Midband Bandpass Filter 02-010701
Downlink Input UHF Highband Bandpass Filter 02-010901
Downlink Output UHF Lowband Bandpass Filter 02-010701
Downlink Output UHF Midband Bandpass Filter 02-010701
Downlink Output UHF Highband Bandpass Filter 02-010901
Downlink Output Crossband Splitter/Coupler 07-005754
Downlink Output Crossband Splitter/Coupler 07-004815
Downlink Output 30dB Coupler 07-018005
Uplink Input 30dB Bi-Directional Coupler 07-022005
Uplink Input Crossband Splitter/Coupler 07-004815
Uplink Input Crossband Splitter/Coupler 07-005754
Uplink Input UHF Lowband Bandpass Filter 02-010701
Uplink Input UHF Midband Bandpass Filter 02-010701
Uplink Input UHF Highband Bandpass Filter 02-010901
Uplink Output UHF Lowband Bandpass Filter 02-010701
Uplink Output UHF Midband Bandpass Filter 02-01070
Uplink Output UHF Highband Bandpass Filter 02-010901
Uplink Output Crossband Splitter/Coupler 07-005754
Uplink Output Crossband Splitter/Coupler 07-004815
Uplink Output 30dB Bi-Directional Coupler 07-022005
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3.3.5.
Section
3.3.5.1.
3.3.5.2.
3.3.5.3.
3.3.5.4.
3.3.5.5.
3.3.5.6.
3.3.5.1.
Combiner 80-301402 Major Sub-Components
Component
Part
02-010701
02-010901
07-004815
07-005754
07-018005
07-022005
Component Part Description
Qty Per
Assembly
Bandpass Filter
Bandpass Filter
Crossband Splitter/Coupler 550/800MHz
Crossband Splitter/Coupler VHF/UHF
30dB Directional Coupler
30dB Bi-Directional Coupler
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 50Ÿ 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
Downlink
UHF Low
Uplink
Passband
Frequency
Downlink
UHF Mid
Uplink
UHF Low
Bandwidth
UHF Mid
Number of sections
Insertion loss
VSWR
Connectors
Power Handling
Temperature
operation
range
storage
Weight
3.3.5.2.
SPECIFICATION
460.4 to 460.5 MHz
465.4 to 465.5 MHz
482.5 to 483.8 MHz
485.7 to 486.8 MHz
0.1 MHz
1.3 MHz
2.4 dB (typical)
better than 1.2:1
SMA
100W max
-20°C to +60°C
-40°C to +70°C
3 kg (typical)
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 50Ÿ 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
Passband
Downlink
Frequency
Uplink
Uplink
Bandwidth
Downlink
Insertion Loss
Power Rating
Impedance
VSWR
Connectors
Weight
3.3.5.3.
PARAMETER
507.0 to 507.3MHz
510.0 to 510.3MHz
0.3 MHz
0.3 MHz
2.9 dB (typical)
50W
50ȍ
Better than 1.2:1
SMA
3Kg (approximately)
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
Passband Frequencies
Insertion loss
Isolation between Bands
VSWR
Impedance
Power rating
operation
Temperature
range
storage
RF Connectors
Weight
3.3.5.4.
Low Pass Port
380 to 550MHz
<0.5dB
>50dB
High Pass Port
800 to 960MHz
<0.5dB
>50dB
1.3:1
50 ohm
50W
-20C to +60C
-40C to +70C
SMA (female)
<1kg
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
Passband Frequencies
Insertion loss
Return loss
Isolation between Bands
Impedance
Power rating
operation
Temperature
range
storage
RF Connectors
Weight
3.3.5.5.
Low Pass Port
High Pass Port
70 to 175 MHz
380 to 500 MHz
<0.5dB
<0.5dB
>14dB typical
>14dB typical
>60dB
>60dB
50 ohm
50W
-20C to +60C
-40C to +70C
SMA (female)
<1kg
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
Frequency Range 70 MHz - 1000MHz
Mainline Insertion Loss <0.5
Coupling Loss 30 dB
VSWR Mainline Better than 1.3:1
Impedance 50 ȍ
Power Handling (CW) 100W
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 -20C to +60C
Temperature
range
storage -40C to +70C
Ingress Protection IP54
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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
Frequency Range
Mainline Insertion Loss
Coupling Loss
Coupling Loss Tolerance
VSWR Mainline
Impedance
Power Handling (CW)
Outline (W x D x H)
Connectors
Case Material
Finish
Operating Temperature
Ingress Protection
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
100kHz – 2.7GHz
< 1.0 dB
30 dB
+/-2.0 dB
Better than 1.4:1
50 ȍ
5W
44.5mm x 41mm x 27mm (ex. connectors)
SMA (female) on all ports
Aluminium
Iridite NCP
-20 to +55°C
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.
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3.4.1.
VHF/UHF BDA Unit (80-301403) System Diagram
Drawing Number 80-301483
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3.4.2.
VHF/UHF BDA Unit (80-301403) Outline Drawing
Drawing Number 80-301493
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3.4.3.
VHF/UHF BDA Unit(80-301403) Specification
Parameter
Specification
Downlink
VHF
UHF Lowband
VHF
UHF Lowband
VHF
UHF Lowband
VHF
UHF Lowband
VHF
UHF Lowband
VHF
UHF Lowband
154.0 to 161.5MHz
460.4 to 460.5MHz
30dB
30dB
0 to 30dB in 2dB steps
0 to 30dB in 2dB steps
> +34.0dBm
> +42.5dBm
1dB below P1dB
1dB below P1dB
> +45.0dBm
> +53.5dBm
VHF
UHF Lowband
VHF
Maximun gain
UHF Lowband
VHF
Gain Adjustment
UHF Lowband
1dB Compression Point
VHF
(P1dB) UHF Lowband
VHF
ALC setting
UHF Lowband
VHF
3rd Order Intercept point
UHF Lowband
VHF
Noise Figure
UHF Lowband
Environmental/Mechanical Specification
Mechanical
Dimensions
(excludes handles and connectors)
RF Connectors
155.5 – 161.0MHz
465.4 – 465.5MHz
30dB
30dB
0 to 30dB in 2dB steps
0 to 30dB in 2dB steps
> +34.0dBm
> +36.5dBm
+27dBm
+27dBm
> +45.0dBm
> +48.0dBm
< 10dB
< 3.0dB
Downlink Passband
Maximun gain
Gain Adjustment
1dB Compression Point
(P1dB)
ALC setting
3rd Order Intercept point
Uplink
Uplink Passband
IP65 Wall Mount
620mm x 620mm x 250mm
(24” x 24” x 10” approx)
N-Type Female
Local Alarms to SCADA
Alarm Interfaces Dry Contact with LED Indication per band
path
Power Supply 24V DC
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3.4.4.
3.4.4.1.
VHF/UHF BDA Unit(80-301403) Photographs
Front View
Note: All connectors (RF, DC and Alarms) are on the underside
Green LED “Power On”
Red LED VHF Downlink Alarm
Red LED VHF Uplink Alarm
Red LED UHF Lowband Downlink Alarm
Red LED UHF Lowband Uplink Alarm
Lockable Door Handles
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3.4.4.2.
Underside view showing connectors
VHF Downlink Input from port 1 on Combiner 80-301402
VHF Downlink Output to port A on Combiner 80-301402
VHF Uplink Input from port F on Combiner 80-301402
VHF Uplink Output to port 6 on Combiner 80-301402
UHF Lowband Downlink Input from port 2 on Combiner 80-301402
UHF Lowband Downlink Output to port B on Combiner 80-301402
UHF Lowband Uplink Input from port G on Combiner 80-301402
UHF Lowband Uplink Output to port 7 on Combiner 80-301402
24V DC Input
VHF Band Alarm Output
UHF Lowband Alarm Output
Earth Connection
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3.4.4.3.
Interior view
AA
VHF Downlink Filters 01-002503 (Input filter below, Output filter above)
VHF Downlink Switched Attenuator 10-000701
VHF Downlink AGC Attenuator 17-001201
VHF Downlink 5W Power Amplifier 12-025602
VHF Downlink AGC Detector 17-001101
VHF Uplink Filters 01-002503 (Input filter below, Output filter above)
VHF Uplink Switched Attenuator 10-000701
VHF Uplink AGC Attenuator 17-001201
VHF Uplink 5W Power Amplifier 12-025602
VHF Uplink AGC Detector 17-001101
UHF Lowband Downlink Switched Attenuator 10-000701
UHF Lowband Downlink AGC Attenuator 17-001201
UHF Lowband Downlink Low Power Amplifier 12-021801
UHF Lowband Downlink 20W Power Amplifier 12-016301
UHF Lowband Downlink 30dB Directional Coupler 07-002908
UHF Lowband Downlink AGC Detector 17-001105
UHF Lowband Uplink Low Noise Amplifier 11-005401
UHF Lowband Uplink Switched Attenuator 10-000701
UHF Lowband Uplink AGC Attenuator 17-001201
UHF Lowband Uplink 5W Power Amplifier 12-021601
UHF Lowband Uplink AGC Detector 17-001101
DC/DC Converter 96-200024
24V Dual Relay Assembly (VHF Alarm output) 20-001602
24V Dual Relay Assembly (UHF Lowband output) 20-001602
24V Relay Assembly 80-008902
Dual Diode Assembly 94-100004
Main DC 10A Circuit Breaker 96-920021
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3.4.5.
Section
3.4.5.1.
3.4.5.2.
3.4.5.3.
3.4.5.4.
3.4.5.5.
3.4.5.6.
3.4.5.7.
3.4.5.8.
3.4.5.9.
3.4.5.10.
3.4.5.11.
3.4.5.12.
3.4.5.13.
3.4.5.1.
VHF/UHF BDA Unit(80-301403) Major Sub-components
Component
Part
01-002503
07-002908
10-000701
11-005401
12-016301
12-021601
12-021801
12-025602
17-001101
17-001105
17-001201
20-001602
80-008902
94-100004
96-200024
Component Part Description
Qty Per
Assembly
Bandpass Filter
30dB Directional Coupler
Switched Attenuator 0.25Watt, 0 - 30dB
Low Noise Amplifier
TETRA Power Amplifier 20W
TETRA Power Amplifier 5W
Low Power Amplifier
VHF Power Amplifier 5W
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
24V Dual Relay Assembly
24V Relay Assembly
Dual Diode Assembly
DC/DC Converter
Bandpass Filter (01-002503)
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 helical 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 50ȍ load at the input and output ports.
Being passive devices, the bandpass filters 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.
No adjustments should be attempted without full network sweep analysis facilities to monitor both
insertion loss and VSWR simultaneously.
01-002503 Specification
SPECIFICATION
Bandpass Downlink
Frequency
Uplink
Downlink
Bandwidth
Uplink
No. of sections
Insertion loss
VSWR
Connectors
Power handling
Temperature
operational
range
store
Weight
Size
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
PARAMETER
154.0 MHz to 161.5 MHz
155.5 MHz to 161.0 MHz
7.5MHz
5.5MHz
1.5dB
Better than 1.2:1
SMA
100W maximum
-20°C to +60°C
-40°C to +70°C
3 kg
384 x 82.5 x 56.4mm
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3.4.5.2.
30dB Directional Coupler (07-002908)
The purpose of these couplers is to tap off known portions of RF signal from transmission lines and to
combine them, for example through splitter units for different purposes (alarms/monitoring etc.), whilst
maintaining an accurate 50: load to all ports/interfaces throughout the specified frequency range.
They are known as directional couplers as they couple power from the RF mainline in one direction
only.
Directional Coupler 07-002908 is configured to tap off 30dB.
07-002908 Specification
PARAMETER
Frequency range
Insertion loss
Coupling level
Rejection
Weight
Connectors
Temperature
operation
range
storage
3.4.5.3.
SPECIFICATION
50 - 1000MHz
<0.3dB
30dB
N/A
<200gms
N type, female
-20°C to +60°C
-40°C to +70°C
Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)
In many practical applications for Cell Enhancers etc., the gain in each path is found to be excessive.
Therefore, provision is made within the unit for the setting of attenuation in each path, to reduce the
gain.
10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the
four miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are
designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and
output.
10-000701 Specification
PARAMETER
Attenuation Values
Attenuation Steps
Power Handling
Attenuation Accuracy
Frequency Range
Impedance
Connectors
VSWR
Weight
Temperature
operation
range
storage
Axell Wireless Limited
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Document Number 80-301401HBKM
SPECIFICATION
0-30dB
2, 4, 8 and 16dB
0.25 Watt
Âą 1.0 dB
DC to 1GHz
50ȍ
SMA
1.3:1
0.2kg
-20°C to +60°C
-40°C to +70°C
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3.4.5.4.
Low Noise Amplifier (11-005401)
The 15dB gain low noise amplifier used in the unit is a double stage solid-state low noise amplifier.
Class A circuitry is used throughout the units to ensure excellent linearity over a very wide dynamic
range. The active devices are very moderately rated to provide a long trouble-free working life. There
are no adjustments on these amplifiers, and in the unlikely event of a failure, the complete amplifier
should be replaced. The amplifier is housed in an aluminium case (Iridite NCP finish) with SMA
connectors for the RF input/output and a 9way D-type for DC and alarm outputs.
11-005401 Specification
PARAMETER
Frequency range
Bandwidth
1dB compression point
3rd order intercept
Gain
VSWR
Input return loss
Noise figure
Connectors
Supply
Temperature
operational
range
storage
Size
Weight
SPECIFICATION
380 - 500MHz
<100MHz (as required, tuneable)
>+20dBm
>+33dBm
>15.5dB (typical)
better than 1.5:1
>14dB
<2.0dB (typical)
SMA female
115mA at 12V DC
-10°C to +60°C
-40°C to +70°C
88 x 50 x 34mm (ex. connectors)
0.26kg
LNA ‘D’ Connector Pin-out details
Connector pin
Signal
+ve input (10-24V)
GND
Alarm relay O/P bad
Alarm relay common
Alarm relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
9-Way Pin-Out Graphical Representation
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3.4.5.5.
TETRA Power Amplifier 20W (12-016301)
This amplifier is a Class A 20W power amplifier from 380MHz to 470MHz in a 1 stage balanced
configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It
has built in a Current Fault Alarm Function.
It is housed is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function. Note the large
diameter DC power input pins (1 & 2) fitted to reduce volt-drop/arcing.
12-016301 Specification
PARAMETER
Frequency range
Small signal gain
Gain flatness
I/O Return loss
1dB compression point
OIP3
Supply voltage
Supply current
Temperature operational
range
storage
Weight
SPECIFICATION
380-470MHz
23dB
Âą1.7dB
>18dB
+43dBm
+55dBm
24V DC
3.8Amps (Typical)
-10°C to +60°C
-20°C to +70°C
<2kg (no heatsink)
7-Way Connector Pin-out details
Connector Pin
Signal
A1 (large pin)
+24V DC
A2 (large pin)
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
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3.4.5.6.
TETRA Power Amplifier 5W (12-021601)
Power amplifier 12-021601 is a multi-stage, solid state power amplifier. Class A circuitry is employed
throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a
long, trouble free working lifetime.
The power amplifier should require no maintenance over its operating life. Under no circumstances
should the cover be removed or the side adjustments disturbed unless it is certain that the amplifier
has failed; since it is critically aligned during manufacture and any re-alignment will require extensive
test equipment.
The unit housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF
input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
12-021601 Specification
PARAMETER
Frequency range:
Bandwidth:
Maximum RF output:
Gain:
1dB compression point:
3rd order intercept point:
VSWR:
Connectors:
Supply:
Weight:
operational:
Temperature
range:
storage:
SPECIFICATION
380-470MHz (as required)
10-40MHz (typical, tuned to spec.)
>5Watts
>30dB
+37.5dBm
+50dBm
better than 1.5:1
SMA female
1.9Amps @ 12V DC
1kg (excluding heatsink)
-10qC to +60qC
-20qC to +70qC
7-Way Connector Pin-out details
Connector Pin
Signal
A1 (large pin)
+12V DC
A2 (large pin)
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
7-Way Pin-Out Graphical Representation
A1
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3.4.5.7.
Low Power Amplifier (1Watt) (12-021801)
The low power amplifier used is a 1 stage balanced configuration, solid-state amplifier. Class A
circuitry is used in the unit to ensure excellent linearity over a very wide dynamic range. The three
active devices are very moderately rated to provide a long trouble-free working life.
Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function.
There are no adjustments on this amplifier, and in the unlikely event of failure then the entire amplifier
should be replaced.
12-021801 Specification
PARAMETER
SPECIFICATION
-20 to +70 qC
380 - 500 MHz
15.5 +/- 0.5 dB
0.7 dB p-p
0.7 dB
20 dB
20 dB
+30.5 dBm
+41.5 dBm
6 dB
10-15 Vdc
540 mA
-10qC to +60qC
-40qC to +100qC
<0.5 kg
110.5 x 66mm x 24.6mm
Temperature
Frequency Range
Small Signal Gain
Gain Flatness
'Gain vs. Temperature
In RL
Out RL
Output Power @ 1dB Compression Point
Output 3rd Order IP
Noise Figure
DC Supply Voltage
DC Supply Current
Temperature
operational:
range
storage:
Weight:
Size:
Low Power Amplifier (12-021801) 9-Way Connector Pin-outs
Connector pin
Signal
+ve input (10-15V)
GND
Alarm relay O/P bad
Alarm relay common
Alarm relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
9-Way Pin-Out Graphical Representation
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3.4.5.8.
VHF Power Amplifier 5W (12-025602)
Power amplifier 12-025602 is a multi-stage, solid state power amplifier. Class A circuitry is employed
throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a
long, trouble free working lifetime. There is a Current Fault Alarm Function, which indicates failure of
each RF transistor with an open collector of a NPN transistor. A relay is fitted to indicate the failure by
voltage free change over the relay contacts.
The power amplifier should require no maintenance over its operating life. Under no circumstances
should the cover be removed or the side adjustments disturbed unless it is certain that the amplifier
has failed; since it is critically aligned during manufacture and any re-alignment will require extensive
test equipment.
The unit housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF
input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
12-025602 Specification
PARAMETER
Frequency range
Maximum RF output
Gain
1dB compression point
3rd order intercept point
In / RL
Out / RL
Noise Figure
Connectors
Supply
operational
Temperature
range
storage
SPECIFICATION
108 to 174 MHz (as required)
>5Watts
t 34 dB
t +37 dBm
t +48 dBm
16 dB
15 dB
” 9.5 dB
SMA female
24 +/- 0.5 Vdc @ 1040 mA Max
-10qC to +60qC
-20qC to +70qC
7-Way Connector Pin-out details
Connector Pin
Signal
A1 (large pin)
+24V DC
A2 (large pin)
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
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3.4.5.9.
Automatic Gain Control
17-001101
17-001105
17-001201
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
VHF/UHF BDA UNIT(80-301403) is fitted with two differing types of Automatic Gain Control (AGC)
system, one linear, and one logarithmic. The Downlink UHF Lowband path is fitted with logarithmic
detector (17-001105), and attenuator (17-001201) the Uplink UHF Lowband path and the two VHF
paths are each fitted with linear detector (17-001101) and attenuator (17-001201)
The Automatic Gain Control system consists of two units, a detector/amplifier and an attenuator. The
detector/amplifier unit is inserted in the RF path on the output of the power amplifier, and the
attenuator is situated in the RF path before the amplification stage(s)
The attenuator comprises a 50ȍ P.I.N diode, voltage-variable attenuator with a range of 3 to 30dB.
The attenuation is controlled by a DC voltage which is derived from the associated detector controller
board.
Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors the RF level
being delivered by the power amplifier, and when a certain threshold is reached it begins to increase
the value of the attenuator to limit the RF output to the (factory set) threshold. Therefore overloading
of the power amplifier is avoided.
The factory set threshold is 1dB below the Enhancer 1dB compression point. Some adjustment of this
AGC threshold level is possible, a 10dB range is mostly achieved. It is not recommended under any
circumstances to adjust the AGC threshold to a level greater than the 1dB compression point as
system degradation will occur.
The detector comprises of a 50ȍ transmission line with a resistive tap which samples a small portion
of the mainline power. The sampled signal is amplified and fed to a conventional half wave diode
rectifier, the output of which is a DC voltage proportional to the RF input signal.
This DC voltage is passed via an inverting DC amplifier with integrating characteristics, to the output,
which drives the attenuation control line of the corresponding AGC attenuator. This unit is fitted at
some earlier point in the RF circuit.
For small signals, below AGC onset, the output control line will be close to 12V and the AGC
attenuator will have minimum attenuation. As the signal level increases the control line voltage will
fall, increasing the attenuator value and keeping the system output level at a constant value.
3.4.5.10.
24V Relay Dual Assembly (20-001602)
The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the
isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with
completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity
protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can
destroy switching transistors or induce spikes on neighbouring circuits. Its common use is to
amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.
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20-001602 Specification
PARAMETER
SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm Threshold Vcc - 1.20 volt +15%
Alarm output relay contacts:
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0ÂľA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x107 operations
Relay approval BT type 56
Connector details Screw terminals
Temperature operational -10°C to +60°C
range
storage -20°C to +70°C
3.4.5.11.
24V Relay Assembly (80-008902)
The General Purpose Relay Board allows the inversion of signals and the isolation of circuits. It is
equipped with a single, dual pole, change-over relay RL1 with completely isolated wiring, accessed
via screw terminals.
The relay is provided with a polarity protection diode and diodes for suppressing the transients
caused by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring
circuits. It’s common use is to amalgamate all the alarm signals into one, volts-free relay contact pair
for the main alarm system.
80-008902 Specification
Parameter
Max. switch current
Max. switch volts
Max. switch power
Min. switch load
Relay isolation
Mechanical life
Relay approval
Connector details
Temperature
operational
range
storage
3.4.5.12.
Specification
1.0Amp
120Vdc/60VA
24W/60VA
10.0ÂľA/10.0mV
1.5kV
>2x107 operations
BT type 56
15-way 0.1" pitch
-10°C to +55°C
-40°C to +70°C
Dual Diode Assembly (94-100004)
The purpose of these dual diode assemblies is to allow two DC voltage sources to be combined, so
that the main DC rail within the equipment can be sourced from either a mains driven PSU, or
externally through an XLR connector or from dual mains driven PSUs . They are very heavy-duty
diodes and they prevent any reverse current from flowing back to their source or the alternative
supply rail. Combining diodes such as these will also be used if the equipment is to be powered from
external back-up batteries.
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3.4.5.13.
DC/DC Converter, 24V in, 12V 5A out (96-200024)
This unit it is an O.E.M high power device with a 5 amp @ 12V (60Watts) output capability used to
derive a 12V fixed voltage power supply rail from a 24V supply. In the event of failure this unit should
not be repaired, only replaced.
96-200024 Specification
PARAMETER
Input Voltage range
Output voltage
Max output current load
Temperature operation
range
storage
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
18-28V DC
12VÂą0.5V
5.0 Amps
-10°C to +60°C
-20°C to +70°C
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3.5.
UHF BDA Unit (80-301404)
UHF BDA Unit (80-301404) provides the amplification stages for the UHF Midband and UHF
Highband paths, The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx).
The Downlink UHF Midband signal is received at the port labelled “UHF MID D/L INPUT” (Annotated
A in the picture in section 3.5.4.2.). 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 Midband
amplification stage is provided by two 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 Midband signal exits the BDA via the port labelled “UHF
MID D/L OUTPUT” (B in section 3.5.4.2.).
The Uplink UHF Midband signal is received at the port labelled “UHF MID U/L INPUT” (D in section
3.5.4.2.). 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
Midband 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 Midband signal exits the BDA via the port labelled “UHF MID U/L OUTPUT” (C in
section 3.5.4.2.).
The Downlink UHF Highband signal is received at the port labelled “UHF HIGH D/L INPUT”
(Annotated G in the picture in section 3.5.4.2.). 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
Highband amplification stage is provided by two 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 Highband signal exits the BDA via the port labelled “UHF
HIGH D/L OUTPUT” (H in section 3.5.4.2.).
The Uplink UHF Highband signal is received at the port labelled “UHF HIGH U/L INPUT” (E in section
3.5.4.2.). 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
Highband 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 Highband signal exits the BDA via the port labelled “UHF HIGH U/L OUTPUT” (F in
section 3.5.4.2.).
UHF BDA Unit (80-301404) 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 UHF Midband and the UHF Highband paths.
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3.5.1.
UHF BDA Unit (80-301404) System Diagram
Drawing Number 80-301484
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3.5.2.
UHF BDA Unit (80-301404) Outline Drawing
Drawing Number 80-301494
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3.5.3.
UHF BDA Unit (80-301404) Specification
Parameter
Specification
Downlink
UHF Midband
UHF Highband
UHF Midband
UHF Highband
UHF Midband
UHF Highband
UHF Midband
UHF Highband
UHF Midband
UHF Highband
UHF Midband
UHF Highband
482.5 to 483.8MHz
507.0 to 507.3MHz
30dB
30dB
0 to 30dB in 2dB steps
0 to 30dB in 2dB steps
> +42.5dBm
> +42.5dBm
1dB below P1dB
1dB below P1dB
> +53.5dBm
> +53.5dBm
UHF Midband
UHF Highband
UHF Midband
Maximun gain
UHF Highband
UHF Midband
Gain Adjustment
UHF Highband
1dB Compression Point
UHF Midband
(P1dB)
UHF Highband
UHF Midband
ALC setting
UHF Highband
UHF Midband
3rd Order Intercept point
UHF Highband
UHF Midband
Noise Figure
UHF Highband
Environmental/Mechanical Specification
Mechanical
Dimensions
(excludes handles and connectors)
RF Connectors
485.7 to 486.8MHz
510.0 to 510.3MHz
30dB
30dB
0 to 30dB in 2dB steps
0 to 30dB in 2dB steps
> +36.5dBm
> +36.5dBm
+27dBm
+27dBm
> +48.0dBm
> +48.0dBm
< 3.0dB
< 3.0dB
Downlink Passband
Maximun gain
Gain Adjustment
1dB Compression Point
(P1dB)
ALC setting
3rd Order Intercept point
Uplink
Uplink Passband
IP65 Wall Mount
620mm x 620mm x 250mm
(24” x 24” x 10” approx)
N-Type Female
Local Alarms to SCADA
Alarm Interfaces Dry Contact with LED Indication per band
path
Power Supply 24V DC
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3.5.4.
3.5.4.1.
UHF BDA Unit (80-301404) Photographs
Front View
Note: All connectors (RF, DC and Alarms) are on the underside
Red LED UHF Highband Downlink Alarm
Red LED UHF Highband Uplink Alarm
Red LED UHF Midband Downlink Alarm
Red LED UHF Midband Uplink Alarm
Green LED “Power On”
Lockable Door Handles
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3.5.4.2.
Underside view showing connectors
UHF Midband Downlink Input from port 3 on Combiner 80-301402
UHF Midband Downlink Output to port C on Combiner 80-301402
UHF Midband Uplink Output to port 8 on Combiner 80-301402
UHF Midband Uplink Input from port H on Combiner 80-301402
UHF Highband Uplink Input from port I on Combiner 80-301402
UHF Highband Uplink Output to port 9 on Combiner 80-301402
UHF Highband Downlink Input from port 4 on Combiner 80-301402
UHF Highband Downlink Output to port D on Combiner 80-301402
24V DC Input
UHF Midband Band Alarm Output
UHF Highband Alarm Output
Earth Connection
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3.5.4.3.
Interior view
AA
BB
CC
UHF Midband Downlink Switched Attenuator 10-000701
UHF Midband Downlink AGC Attenuator 17-001201
UHF Midband Downlink Low Power Amplifier 12-021801
UHF Midband Downlink 20W Power Amplifier 12-016301
UHF Midband Downlink 30dB Directional Coupler 07-002908
UHF Midband Downlink AGC Detector Assembly 17-001105
UHF Midband Uplink Low Noise Amplifier 11-005401
UHF Midband Uplink Switched Attenuator 10-000701
UHF Midband Uplink AGC Attenuator 17-001201
UHF Midband Uplink 5W Power Amplifier 12-021601
UHF Midband Uplink AGC Detector Assembly 17-001101
UHF Highband Downlink Switched Attenuator 10-000701
UHF Highband Downlink AGC Attenuator 17-001201
UHF Highband Downlink Low Power Amplifier 12-021801
UHF Highband Downlink 20W Power Amplifier 12-016301
UHF Highband Downlink 30dB Directional Coupler 07-002908
UHF Highband Downlink AGC Detector Assembly 17-001105
UHF Highband Uplink Low Noise Amplifier 11-005401
UHF Highband Uplink Switched Attenuator 10-000701
UHF Highband Uplink AGC Attenuator 17-001201
UHF Highband Uplink 5W Power Amplifier 12-021601
UHF Highband Uplink AGC Detector Assembly 17-001101
DC/DC Converter 13-003011
24V Dual Relay Assembly 20-001602 UHF Highband Alarms
24V Dual Relay Assembly 20-001602 UHF Midband Alarms
24V Relay Assembly 80-008909 UHF Midband Alarms
24V Relay Assembly 80-008909 UHF Highband Alarms
Dual Diode Assembly 94-100004
DC Circuit Breaker
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3.5.5.
Section
3.5.5.1.
3.5.5.2.
3.5.5.3.
3.5.5.4.
3.5.5.5.
3.5.5.6.
3.5.5.7.
3.5.5.8.
3.5.5.9.
3.5.5.10.
3.5.5.11.
3.5.5.1.
UHF BDA Unit (80-301404) Major Sub-components
Component
Part
07-002908
10-000701
11-005401
12-016301
12-021601
12-021801
13-003011
17-001101
17-001105
17-001201
20-001602
80-008909
94-100004
Component Part Description
30dB Directional Coupler
Switched Attenuator 0.25Watt, 0 - 30dB
Low Noise Amplifier
TETRA Power Amplifier 20W
TETRA Power Amplifier 5W
Low Power Amplifier
DC/DC Converter
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
24V Dual Relay Assembly
24V Relay Assembly
Dual Diode Assembly
Qty Per
Assembly
30dB Directional Coupler (07-002908)
The purpose of these couplers is to tap off known portions of RF signal from transmission lines and to
combine them, for example through splitter units for different purposes (alarms/monitoring etc.), whilst
maintaining an accurate 50: load to all ports/interfaces throughout the specified frequency range.
They are known as directional couplers as they couple power from the RF mainline in one direction
only.
Directional Coupler 07-002908 is configured to tap off 30dB.
07-002908 Specification
PARAMETER
Frequency range
Insertion loss
Coupling level
Rejection
Weight
Connectors
Temperature
operation
range
storage
3.5.5.2.
SPECIFICATION
50 - 1000MHz
<0.3dB
-30dB
N/A
<200g
N type, female
-20°C to +60°C
-40°C to +70°C
Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)
In many practical applications for Cell Enhancers etc., the gain in each path is found to be excessive.
Therefore, provision is made within the unit for the setting of attenuation in each path, to reduce the
gain.
10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the
four miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are
designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and
output.
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10-000701 Specification
PARAMETER
Attenuation Values
Attenuation Steps
Power Handling
Attenuation Accuracy
Frequency Range
Impedance
Connectors
VSWR
Weight
Temperature
operation
range
storage
3.5.5.3.
SPECIFICATION
0-30dB
2, 4, 8 and 16dB
0.25 Watt
Âą 1.0 dB
DC to 1GHz
50ȍ
SMA
1.3:1
0.2kg
-20°C to +60°C
-40°C to +70°C
Low Noise Amplifier (11-005401)
The 15dB gain low noise amplifier used in the unit is a double stage solid-state low noise amplifier.
Class A circuitry is used throughout the units to ensure excellent linearity over a very wide dynamic
range. The active devices are very moderately rated to provide a long trouble-free working life. There
are no adjustments on these amplifiers, and in the unlikely event of a failure, the complete amplifier
should be replaced. The amplifier is housed in an aluminium case (Iridite NCP finish) with SMA
connectors for the RF input/output and a 9way D-type for DC and alarm outputs.
11-005401 Specification
PARAMETER
Frequency range
Bandwidth
1dB compression point
3rd order intercept
Gain
VSWR
Input return loss
Noise figure
Connectors
Supply
Temperature
operational
range
storage
Size
Weight
SPECIFICATION
380 - 500MHz
<100MHz (as required, tuneable)
>+20dBm
>+33dBm
>15.5dB (typical)
better than 1.5:1
>14dB
<2.0dB (typical)
SMA female
115mA at 12V DC
-10°C to +60°C
-40°C to +70°C
88 x 50 x 34mm (ex. connectors)
0.26kg
LNA ‘D’ Connector Pin-out details
Connector pin
Signal
+ve input (10-24V)
GND
Alarm relay O/P bad
Alarm relay common
Alarm relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
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3.5.5.4.
TETRA Power Amplifier 20W (12-016301)
This amplifier is a Class A 20W power amplifier from 380MHz to 470MHz in a 1 stage balanced
configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It
has built in a Current Fault Alarm Function.
It is housed is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function. Note the large
diameter DC power input pins (1 & 2) fitted to reduce volt-drop/arcing.
12-016301 Specification
PARAMETER
Frequency range
Small signal gain
Gain flatness
I/O Return loss
1dB compression point
OIP3
Supply voltage
Supply current
Temperature operational
range
storage
Weight
SPECIFICATION
380-470MHz
23dB
Âą1.7dB
>18dB
+43dBm
+55dBm
24V DC
3.8Amps (Typical)
-10°C to +60°C
-20°C to +70°C
<2kg (no heatsink)
7-Way Connector Pin-out details
Connector Pin
Signal
A1 (large pin)
+24V DC
A2 (large pin)
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
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3.5.5.5.
TETRA Power Amplifier 5W (12-021601)
Power amplifier 12-021601 is a multi-stage, solid state power amplifier. Class A circuitry is employed
throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a
long, trouble free working lifetime.
The power amplifier should require no maintenance over its operating life. Under no circumstances
should the cover be removed or the side adjustments disturbed unless it is certain that the amplifier
has failed; since it is critically aligned during manufacture and any re-alignment will require extensive
test equipment.
The unit housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF
input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
12-021601 Specification
PARAMETER
Frequency range:
Bandwidth:
Maximum RF output:
Gain:
1dB compression point:
3rd order intercept point:
VSWR:
Connectors:
Supply:
Weight:
operational:
Temperature
range:
storage:
SPECIFICATION
380-470MHz (as required)
10-40MHz (typical, tuned to spec.)
>5Watts
>30dB
+37.5dBm
+50dBm
better than 1.5:1
SMA female
1.9Amps @ 12V DC
1kg (excluding heatsink)
-10qC to +60qC
-20qC to +70qC
7-Way Connector Pin-out details
Connector Pin
Signal
A1 (large pin)
+10-24V DC
A2 (large pin)
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
7-Way Pin-Out Graphical Representation
A1
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3.5.5.6.
Low Power Amplifier (12-021801)
The low power amplifier used is a 1 stage balanced configuration, solid-state amplifier. Class A
circuitry is used in the unit to ensure excellent linearity over a very wide dynamic range. The three
active devices are very moderately rated to provide a long trouble-free working life.
Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function.
There are no adjustments on this amplifier, and in the unlikely event of failure then the entire amplifier
should be replaced.
12-021801 Specification
PARAMETER
Temperature
Frequency Range
Small Signal Gain
Gain Flatness
'Gain vs. Temperature
In RL
Out RL
Output Power @ 1dB Compression Point
Output 3rd Order IP
Noise Figure
DC Supply Voltage
DC Supply Current
Temperature
operational
range
storage
Weight
Size
SPECIFICATION
-20 to +70 qC
380 - 500 MHz
15.5 +/- 0.5 dB
0.7 dB p-p
0.7 dB
20 dB
20 dB
+30.5dBm
+41.5dBm
6 dB
10-15 Vdc
540 mA Max
-10qC to +60qC
-40qC to +100qC
<0.5 kg
110.5 x 66mm x 24.6mm
Low Power Amplifier (12-021801) 9-Way Connector Pin-outs
Connector pin
Signal
+ve input (10-15V)
GND
Alarm relay O/P bad
Alarm relay common
Alarm relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
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3.5.5.7.
DC/DC Converter, 24V in, 12V 8A out (13-003011)
The DC/DC converter fitted is a high power PCB unit with an 8 amp at 12V output capability. The
circuit is basically an O.E.M semiconductor regulator (one side of which has a heatsink mounting
plate, usually bolted to the casing of the unit) and smoothing components built onto a printed circuit
board with screw block terminations.
In event of failure this unit should not be repaired, only replaced.
13-003011 Specification
PARAMETER
Input Voltage range
Output voltage
Max. current load
Temperature
operation
range
storage
Size(PCB)
Weight (Loaded PCB)
3.5.5.8.
Automatic Gain Control
17-001101
17-001105
17-001201
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
SPECIFICATION
18-28V DC
12VÂą0.5V
8.0Amps
-10°C to +60°C
-20°C to +70°C
190 x 63mm
291g
UHF BDA UNIT(80-301404) is fitted with two differing types of Automatic Gain Control (AGC) system,
one linear, and one logarithmic. The Downlink UHF Midband and Highband paths are each fitted with
logarithmic detector (17-001105), and attenuator (17-001201) the Uplink UHF Midband and Highband
paths are each fitted with linear detector (17-001101) and attenuator (17-001201) The Automatic Gain
Control system consists of two units, a detector/amplifier and an attenuator. The detector/amplifier
unit is inserted in the RF path on the output of the power amplifier, and the attenuator is situated in
the RF path before the amplification stage(s)
The attenuator comprises a 50ȍ P.I.N diode, voltage-variable attenuator with a range of 3 to 30dB.
The attenuation is controlled by a DC voltage which is derived from the associated detector controller
board. Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors the RF
level being delivered by the power amplifier, and when a certain threshold is reached it begins to
increase the value of the attenuator to limit the RF output to the (factory set) threshold. Therefore
overloading of the power amplifier is avoided.
The factory set threshold is 1dB below the Enhancer 1dB compression point. Some adjustment of this
AGC threshold level is possible, a 10dB range is mostly achieved. It is not recommended under any
circumstances to adjust the AGC threshold to a level greater than the 1dB compression point as
system degradation will occur.
The detector comprises of a 50ȍ transmission line with a resistive tap which samples a small portion
of the mainline power. The sampled signal is amplified and fed to a conventional half wave diode
rectifier, the output of which is a DC voltage proportional to the RF input signal. This DC voltage is
passed via an inverting DC amplifier with integrating characteristics, to the output, which drives the
attenuation control line of the corresponding AGC attenuator. This unit is fitted at some earlier point in
the RF circuit. For small signals, below AGC onset, the output control line will be close to 12V and the
AGC attenuator will have minimum attenuation. As the signal level increases the control line voltage
will fall, increasing the attenuator value and keeping the system output level at a constant value.
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3.5.5.9.
24V Relay Dual Assembly (20-001602)
The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the
isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with
completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity
protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can
destroy switching transistors or induce spikes on neighbouring circuits. Its common use is to
amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.
20-001602 Specification
PARAMETER
SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm Threshold Vcc - 1.20 volt +15%
Alarm output relay contacts:
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0ÂľA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x107 operations
Relay approval BT type 56
Connector details Screw terminals
Temperature operational -10°C to +60°C
range
storage -20°C to +70°C
3.5.5.10.
24V Relay Assembly (80-008909)
Relay Board (80-008909) allows the inversion of signals and the isolation of circuits. It is equipped
with a single dual pole change-over relay RL1, with completely isolated wiring, accessed via a 15 way
in-line connector. The relay is provided with polarity protection diodes and diodes for suppressing the
transients caused by "flywheel effect" which can destroy switching transistors or induce spikes on
neighbouring circuits. It’s common use is to amalgamate all the alarm signals into one, volts-free
relay contact pair for the main alarm system. This relay board also carries an LED to serve as a
“Status OK” indicator which is illuminated during normal operation.
80-008909 Specification
PARAMETER
SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm threshold Vcc - 1.20 volt +15%
Alarm output relay contacts
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0ÂľA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x107 operations
Relay approval BT type 56
Connector details Screw terminals
Temperature
operational -10°C to +60°C
range
storage -20°C to +70°C
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3.5.5.11.
Dual Diode Assembly (94-100004)
The purpose of these dual diode assemblies is to provide polarity protection for the DC supply input.
They are very heavy-duty diodes and they prevent any reverse current from flowing back to their
source.
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3.6.
800MHz BDA UNIT (80-301405)
800MHz BDA UNIT (80-301405) provides the amplification stages for the 800MHz paths, The unit is
housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx).
The Downlink 800MHz signal is received at the port labelled “D/L INPUT” (Annotated A in the picture
in section 3.6.4.2.). The Downlink 800MHz 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 the
Attenuator the signal passes through the first of two amplification stages. This first stage is provided
by a low noise amplifier which gives approx. 19dB of gain.
After the Low Noise Amplifier the Downlink 800MHz signal passes through the second amplification
stage; the signal is first split into two equal paths and then each path is passed through a 20W power
amplifier and then the two signal paths are re-combined. The second stage amplifiers are straddled
by an Automatic Gain Control assembly providing limiting to the output signals in the case of high
input signals.
After leaving the second stage amplifiers the Downlink 800MHz signal path passes through a second
bandpass filter before exiting the BDA via the port labelled “D/L OUTPUT” (B in section 3.6.4.2.).
The Uplink 800MHz signal is received at the port labelled “U/L INPUT” (C in section 3.6.4.2.). The
Uplink 800MHz path passes through a bandpass filter to remove out of band noise and then into the
first of two amplification stages, the first stage is provided by a low noise amplifier which gives approx.
19dB of gain; after leaving the Low Noise Amplifier the signal passes through a switched attenuator
providing 0 to 30 dB of RF signal attenuation,
After leaving the switched attenuator the Uplink 800MHz path passes through the second stage of
amplification which is provided by a 5W power amplifier giving approx. 30db of gain; this second
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 second amplification stage the Uplink 800MHz path passes through a second
bandpass filter before exiting the BDA via the port labelled “U/L OUTPUT” (D in section 3.6.4.2.).
800MHz BDA UNIT (80-301405) is provided with a 24V DC input to power the amplifier modules
within and those amplifier modules are configured to provide alarm status reports.
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3.6.1.
800MHz BDA UNIT (80-301405) System Diagram
Drawing Number 80-301485
Axell Wireless Limited
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3.6.2.
800MHz BDA UNIT (80-301405) Outline Drawing
Drawing Number 80-301495
Axell Wireless Limited
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3.6.3.
800MHz BDA UNIT (80-301405) Specification
Parameter
Specification
Downlink
Downlink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
856.0 to 861.0MHz
30dB
0 to 30dB in 2dB steps
> +45.0dBm
1dB below P1dB
> +55.0dBm
Uplink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Noise Figure
Environmental/Mechanical Specification
Mechanical
Dimensions
(excludes handles and connectors)
RF Connectors
811.0 to 816.0MHz
30dB
0 to 30dB in 2dB steps
> +36.0dBm
+27dBm
> +46.0dBm
< 5.0 dB
Uplink
IP65 Wall Mount
620mm x 620mm x 250mm
(24” x 24” x 10” approx)
N-Type Female
Local Alarms to SCADA
Alarm Interfaces Dry Contact with LED Indication per band
path
Power Supply 24V DC
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3.6.4.
3.6.4.1.
800MHz BDA UNIT (80-301405) Photographs
Front View
Note: All connectors (RF, DC and Alarms) are on the underside
3.6.4.2.
Green LED “Power On”
Red LED Uplink Alarm
Red LED Downlink Alarm
Lockable Door Handles
Underside view showing connectors
800MHz Downlink Input from port 5 on Combiner 80-301402
800MHz Downlink output to port E on Combiner 80-301402
800MHz Downlink Input from port J on Combiner 80-301402
800MHz Downlink output to port 10 on Combiner 80-301402
Alarm Output
24V DC Input
Earth Connection
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3.6.4.3.
Interior view
Downlink Input Bandpass Filter 02-011601
Downlink Switched Attenuator 10-000701
Downlink Low Noise Amplifier 11-005902
Downlink AGC Attenuator Assembly17-001201
Downlink Splitter/Combiner 05-002602 (splits signal to feed Power Amplifiers)
Downlink 20W Power Amplifier 12-020501 (1)
Downlink 20W Power Amplifier 12-020501 (2)
Downlink Splitter/Combiner 05-002602 (combines signals from Power Amplifiers)
Downlink 30dB Directional Coupler 07-002907
Downlink AGC Detector Assembly17-001105
Downlink Output Bandpass Filter 02-011601
Uplink Input Bandpass Filter 02-011601
Uplink Low Noise Amplifier 11-005902
Uplink Switched Attenuator 10-000701
Uplink AGC Attenuator Assembly17-001201
Uplink 5W Power Amplifier 12-018601
Uplink AGC Detector Assembly17-001101
Uplink Output Bandpass Filter 02-011601
24V Relay Dual Assembly 20-001602
DC/DC Converter 96-200024
Dual Diode Assembly 94-100004
Main DC Circuit Breaker
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3.6.5.
section
3.6.5.1.
3.6.5.2.
3.6.5.3.
3.6.5.4.
3.6.5.5.
3.6.5.6.
3.6.5.7.
3.6.5.8.
3.6.5.9.
3.6.5.10.
3.6.5.11.
3.6.5.1.
800MHz BDA UNIT (80-301405) Major Sub-components
Component
Part
02-011601
05-002602
07-002907
10-000701
11-005902
12-018601
12-020501
17-001101
17-001105
17-001201
20-001602
94-100004
96-200024
Component Part Description
Bandpass FIlter
Splitter/Combiner
30dB Directional Coupler
Switched Attenuator 0.25Watt, 0 - 30dB
Low Noise Amplifier
5W Power Amplifier
20W Power Amplifier
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
24V Relay Dual Assembly
Dual Diode Assembly
DC/DC Converter, 24V in, 12V 5A out
Qty Per
Assembly
Bandpass Filter (02-011601)
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 50ȍ 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.
02-011601 Specification
PARAMETER
Frequency
Downlink
Range
Uplink
Downlink
Bandwidth
Uplink
Number of Sections
Insertion Loss
VSWR
Connectors
Power Handling
Temperature operation
range
storage
Weight
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
856 to 861MHz
811 to 816MHz
5 MHz
5 MHz
1.2 dB
better than 1.2:1
SMA
100W max
-10°C to +55°C
-40°C to +70°C
3 kg (typical)
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3.6.5.2.
Splitter/Combiner (05-002602)
The Splitter/Combiner used is a device for accurately matching two or more RF signals to single or
multiple ports, whilst maintaining an accurate 50: load to all inputs/outputs and ensuring that the
VSWR and insertion losses are kept to a minimum. Any unused ports should be terminated with an
appropriate 50: load.
Being passive devices, the splitters should have an extremely long operational life and require no
maintenance. Should a unit be suspect, it is usually most time efficient to replace the whole module
rather than attempt repair or re-tuning.
05-002602 Specification
PARAMETER
Frequency Range
Bandwidth
Ports
Insertion loss
Return loss input & output
Impedance
Isolation
MTFB
Splitting
Power rating
Combining
Connectors
Weight
Size
3.6.5.3.
SPECIFICATION
800 – 1000MHz
200MHz
3.3dB typical
1.3:1
50ȍ
>20dB
>180,000 hours
20Watts
0.5Watt
SMA female
200g (approximately)
54 x 44 x 21mm
30dB Directional Coupler (07-002907)
The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from
transmission lines inband to combine them, for example through splitter units for different purposes
(alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the
specified frequency range. They are known as directional couplers as they couple power from the RF
mainline in one direction only.
07-002907 Specification
PARAMETER
Frequency range
Insertion loss
Coupling level
Rejection
Weight
Connectors
Temperature
operation
range
storage
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
800 - 1000MHz
<0.3dB
-30dB Âą0.5dB
N/A
<200g
SMA, female
-20°C to +60°C
-40°C to +70°C
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3.6.5.4.
Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)
10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the
four miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are
designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and
output.
10-000701 Specification
PARAMETER
Attenuation Values
Attenuation Steps
Power Handling
Attenuation Accuracy
Frequency Range
Impedance
Connectors
VSWR
Weight
Temperature
operation
range
storage
3.6.5.5.
SPECIFICATION
0-30dB
2, 4, 8 and 16dB
0.25 Watt
Âą 1.0 dB
DC to 1GHz
50ȍ
SMA
1.3:1
0.2kg
-20°C to +60°C
-40°C to +70°C
Low Noise Amplifier (11-005902)
The Gallium-Arsenide low noise amplifier used in the unit is a double stage, solid-state low noise
amplifier. Class A circuitry is used throughout the units to ensure excellent linearity and extremely low
noise over a very wide dynamic range. The active devices are very moderately rated to provide a long
trouble-free working life. There are no adjustments on these amplifiers, and in the unlikely event of a
failure, then the complete amplifier should be replaced.
This amplifier features its own in-built alarm system which gives a volt-free relay contact type alarm
that is easily integrated into any alarm system. There is a Current Fault Alarm Function, which
indicates failure of each one or both RF transistors by a various alarm output options. The amplifier is
housed in an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a
9way D-type for DC and alarm outputs.
11-005902 Specification
PARAMETER
Frequency range
Bandwidth
Gain
1dB compression point
OIP3
Input/output return loss
Noise figure
Power consumption
Supply voltage
Connectors
Temperature
operational
range
storage
Size
Weight
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
800 – 960MHz
<170MHz
19.5dB (typical)
+21dBm
+33dBm
>20dB
1dB (typical)
190mA @ 24V DC
10-24V DC
SMA female
-10°C to +60°C
-40°C to +70°C
90 x 55 x 30.2mm
0.28kg
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LNA ‘D’ Connector Pin-out details
Connector pin
3.6.5.6.
Signal
+Ve input (10-24V)
GND
Alarm relay O/P bad
Alarm relay common
Alarm relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
5W Power Amplifier (12-018601)
This amplifier is a Class A 5W power amplifier from 800MHz to 960MHz in a 1 stage balanced
configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It
has built in a Current Fault Alarm Function.
Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function.
12-018601 Specification
PARAMETER
Frequency range
Small signal gain
Gain flatness
I/O Return loss
1dB compression point
OIP3
Supply voltage
Supply current
Temperature operational
range
storage
Weight
SPECIFICATION
800-960MHz
30dB
Âą0.5dB
>20dB
+37dBm
+52dBm
12V DC
2.0Amps (typical)
-10°C to +60°C
-20°C to +70°C
<2kg (no heatsink)
PA 7-Way Connector Pin-outs
Connector Pin
A1 (large pin)
A2 (large pin)
Signal
+12V DC
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
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3.6.5.7.
20W Power Amplifier (12-020501)
This amplifier is a Class A 20W power amplifier from 800-960MHz in a 1 stage balanced
configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It
has built in a Current Fault Alarm Function.
Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function.
12-020501 Specification
PARAMETER
Frequency range
Small signal gain
Gain flatness
I/O Return loss
1dB compression point
OIP3
Supply voltage
Supply current
Temperature
operational
range
storage
Weight
SPECIFICATION
800-960MHz
31.5dB
Âą0.6dB
>18dB
+43.5dBm
+54dBm
24V DC
4.6Amps @12V(typical)
-10°C to +60°C
-20°C to +70°C
<2kg (no heatsink)
PA 7-Way Connector Pin-outs
Connector Pin
A1 (large pin)
A2 (large pin)
Signal
+24V DC
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
7-Way Connector Graphical Representation
A1
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3.6.5.8.
Automatic Gain Control
17-001101
17-001105
17-001201
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
800MHz BDA UNIT (80-301405) is fitted with two differing types of Automatic Gain Control (AGC)
system, one linear, and one logarithmic. The Downlink path is fitted with logarithmic detector (17001105), and attenuator (17-001201) the Uplink path is fitted with linear detector (17-001101) and
attenuator (17-001201)
The Automatic Gain Control system consists of two units, a detector/amplifier and an attenuator. The
detector/amplifier unit is inserted in the RF path on the output of the power amplifier, and the
attenuator is situated in the RF path before the amplification stage(s)
The attenuator comprises a 50ȍ P.I.N diode, voltage-variable attenuator with a range of 3 to 30dB.
The attenuation is controlled by a DC voltage which is derived from the associated detector controller
board.
Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors the RF level
being delivered by the power amplifier, and when a certain threshold is reached it begins to increase
the value of the attenuator to limit the RF output to the (factory set) threshold. Therefore overloading
of the power amplifier is avoided.
The factory set threshold is 1dB below the Enhancer 1dB compression point. Some adjustment of this
AGC threshold level is possible, a 10dB range is mostly achieved. It is not recommended under any
circumstances to adjust the AGC threshold to a level greater than the 1dB compression point as
system degradation will occur.
The detector comprises of a 50ȍ transmission line with a resistive tap which samples a small portion
of the mainline power. The sampled signal is amplified and fed to a conventional half wave diode
rectifier, the output of which is a DC voltage proportional to the RF input signal.
This DC voltage is passed via an inverting DC amplifier with integrating characteristics, to the output,
which drives the attenuation control line of the corresponding AGC attenuator. This unit is fitted at
some earlier point in the RF circuit.
For small signals, below AGC onset, the output control line will be close to 12V and the AGC
attenuator will have minimum attenuation. As the signal level increases the control line voltage will
fall, increasing the attenuator value and keeping the system output level at a constant value.
3.6.5.9.
24V Relay Dual Assembly (20-001602)
The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the
isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with
completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity
protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can
destroy switching transistors or induce spikes on neighbouring circuits. Its common use is to
amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.
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20-001602 Specification
PARAMETER
SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm Threshold Vcc - 1.20 volt +15%
Alarm output relay contacts:
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0ÂľA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x107 operations
Relay approval BT type 56
Connector details Screw terminals
Temperature operational -10°C to +60°C
range
storage -20°C to +70°C
3.6.5.10.
Dual Diode Assembly (94-100004)
The purpose of these dual diode assemblies is to provide polarity protection for the DC voltage input.
They are very heavy-duty diodes and they prevent any reverse current from flowing back to their
source.
3.6.5.11.
DC/DC Converter, 24V in, 12V 5A out (96-200024)
This unit it is an O.E.M high power device with a 5 amp @ 12V (60Watts) output capability used to
derive a 12V fixed voltage power supply rail from a 24V supply. In the event of failure this unit should
not be repaired, only replaced.
96-200024 Specification
PARAMETER
Input Voltage range
Output voltage
Max. current load
Temperature operation
range
storage
Axell Wireless Limited
Technical Literature
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SPECIFICATION
18-28V DC
12VÂą0.5V
5.0 Amps
-10°C to +60°C
-20°C to +70°C
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4.
In-Line BDA Rack Mount 80-301406
The Rack Mount In Line BDA consists of ten, 19” equipment rack mount shelves
The function is exactly the same as the Wall Mount unit in section 3 but the construction is different.
The Rack Mount BDA is divided into four main components equivalent to the four Wall Mount cases
described in section 3, these are:
The Splitter Combiner which is comprised of four, 4U 19” rack mount shelves:
Downlink Input Shelf 80-301407
Downlink Output Shelf 80-301408
Uplink Input Shelf 80-301407
Uplink Output Shelf 80-301407
The VHF and UHF Low Band Amplifier which is comprised of two, 4U 19” rack mount shelves:
VHF Amplifier Shelf 80-301409
UHF Lowband Amplifier Shelf 80-301410
The Mid and High Band UHF Amplifier which is comprised of two, 4U 19” rack mount shelves:
UHF Midband Amplifier Shelf 80-301410
UHF Highband Amplifier Shelf 80-301410
The 800MHz Amplifier which is comprised of one, 8U 19” rack mount shelf:
800MHz Amplifier Shelf 80-301411
A 2U 19” rack mount shelf houses the power supply unit that provides 24V DC feeds to the amplifier
shelves
The entire arrangement is housed in two, 40U Swing-fame 19” Equipment Mountings Racks,
Rack 1 houses:
Downlink Input Shelf 80-301407
Uplink Input Shelf 80-301407
Uplink Output Shelf 80-301407
UHF Highband Amplifier Shelf 80-301410
UHF Midband Amplifier Shelf 80-301410
UHF Lowband Amplifier Shelf 80-301410
VHF Amplifier Shelf 80-301409
PSU Shelf
Rack 2 houses:
Downlink Output Shelf 80-301408
800MHz Amplifier Shelf 80-301411
Rack interconnections, test ports and connections to the Leaky Feeders are via patch panels in the
tops of each rack
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Downlink
The downlink signal is received from the radiating cable and enters the Downlink Input Shelf 80301407 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 leave Downlink Input Shelf 80-301407. The VHF path goes to the
Downlink Input of VHF Amplifier Shelf 80-301409 and the UHF Lowband path goes to the Downlink
Input of UHF Lowband Amplifier Shelf 80-301410.
The UHF Mid and Highband paths leave Downlink Input Shelf 80-301407 the UHF Midband path goes
to the Downlink Input of UHF Midband Amplifier Shelf 80-301410; the UHF Highband path goes to the
Downlink Input of UHF Highband Amplifier Shelf 80-301410
The 800MHz path leaves Downlink Input Shelf 80-301407 and goes to the Downlink Input of 800MHz
Amplifier Shelf 80-301411
After their respective amplification stages the signal paths enter Downlink Output Shelf 80-301408
where they are combined into a single path and fed into the radiating cable.
Uplink
The Uplink signal signal is received from the radiating cable and enters Uplink Input Shelf 80-301407
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 High band paths.
The VHF and UHF LowBand paths leave Uplink Input Shelf 80-301407. The VHF path goes to the
Uplink Input of VHF Amplifier Shelf 80-301409 and the UHF Lowband path goes to the Uplink Input of
UHF Lowband Amplifier Shelf 80-301410.
The UHF Mid and Highband paths leave Uplink Input Shelf 80-301407 the UHF Midband path goes to
the Uplink Input of UHF Midband Amplifier Shelf 80-301410; the UHF Highband path goes to the
Uplink Input of UHF Highband Amplifier Shelf 80-301410
The 800MHz path leaves Uplink Input Shelf 80-301407 and goes to the Uplinklink Input of 800MHz
Amplifier Shelf 80-301411
After their respective amplification stages the signal paths enter Uplink Output Shelf 80-301407 where
they are combined into a single path and fed into the radiating cable.
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4.1.
In-Line BDA Rack Mount System Diagrams
4.1.1. Overall System Diagram
Drawing Number 80-301486
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4.1.2. Combiners System Diagram
Drawing Number 80-301487
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4.2.
In-Line BDA Rack Mount 80-301406 Specification
ELECTRICAL SPECIFICATION
Downlink
VHF
Uplink
Downlink
UHF Low
Uplink
Frequency
Downlink
UHF Mid
Range
Uplink
Downlink
UHF High
Uplink
Downlink
800MHz
Uplink
Passband Ripple
VHF
UHF Low
Downlink Power
UHF Mid
Amplifier
UHF High
800MHz
VHF
UHF Low
Uplink Power
UHF Mid
Amplifier
UHF High
800MHz
Gain
Gain Adjust
Sampling Ports
VSWR
Impedance
Power Supply
Power Consumption
Mechanical Specification
154.0 to 161.5 MHz
155.5 to 161.0 MHz
460.4 to 460.5 MHz
465.4 to 465.5 MHz
482.5 to 483.8 MHz
485.7 to 486.8 MHz
507.0 to 507.3 MHz
510.0 to 510.3 MHz
856.0 to 861.0 MHz
811.0 to 816.0 MHz
Âą 1.5dB
5 Watts
20 Watts
20 Watts
20 Watts
40 Watts
5 Watts
5 Watts
5 Watts
5 Watts
5 Watts
30dB
0 - 30dB in 2dB Steps
30dB
1.5:1
50 Ohms
24V DC
< 800 Watts
Two 40U, 19” Swingframe, 600mm x
600mm Equipment Mounting racks
RF Connectors N-Type Female
Local Alarms to SCADA
Alarm Interfaces Dry Contact with LED Indication per
band path
Mechanical
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4.3.
In-Line BDA Rack Mount 80-301406 Illustrations
4.3.1. Rack 1 Front View
Downlink Input Shelf 80-301407
Uplink Input Shelf 80-301407
Uplink Output Shelf 80-301407
UHF Highband Amplifier Shelf 80-301410
UHF Midband Amplifier Shelf 80-301410
UHF Lowband Amplifier Shelf 80-301410
VHF Amplifier Shelf 80-301409
PSU Shelf
PSU Modules
2U Blanking Panel
1U Blanking panel
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4.3.2.
Rack 1 Rear View
Downlink Input Shelf 80-301407
Uplink Input Shelf 80-301407
Uplink Output Shelf 80-301407
UHF Highband Amplifier Shelf 80-301410
UHF Midband Amplifier Shelf 80-301410
UHF Lowband Amplifier Shelf 80-301410
VHF Amplifier Shelf 80-301409
PSU Shelf
Rack Interconnections
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
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Date 13/06/2008
Page 75 of 148
4.3.3.
Rack 2 Front View
Downlink Output Shelf 80-301408
800MHz Amplifier Shelf 80-301411
4U Blanking panel
1U Blanking panel
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
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4.3.4.
Rack 2 Rear View
Top part of rack only
Downlink Output Shelf 80-301408
800MHz Amplifier Shelf 80-301411
Rack Interconnections
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
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Date 13/06/2008
Page 77 of 148
4.3.5.
Rack 1 Top View
U/L I/P “J”
U/L I/P
D/L I/P
U/L O/P
UHF HIGH D/P O/P
UHF MID D/L O/P
D/L I/P TEST PORT
U/L I/P TEST PORT
D/L I/P “A”
U/L O/P TEST PORT
U/L O/P “C”
UHF LOW D/L O/P
VHF D/L O/P
CABLE GLAND FOR ELECTRICAL WIRING
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
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Date 13/06/2008
Page 78 of 148
4.3.6.
Rack 2 Top View
D/L O/P “D”
D/L O/P “B”
D/L I/P
D/L O/P
U/L I/P
D/L O/P “C”
U/L O/P
D/L O/P TEST PORT
D/L O/P “A”
CABLE GLAND FOR ELECTRICAL WIRING
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
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Date 13/06/2008
Page 79 of 148
4.4.
In-Line BDA Rack Mount 80-301401 List of Major Components
Section
4.5.
4.6.
4.7.
4.8.
4.9.
4.10.
4.11.
4.12.
4.13.
4.14
Component
Part
80-301407
80-301408
80-301407
80-301407
80-301409
80-301410
80-301410
80-301410
80-301411
96-300064
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
Component Part Description
Downlink Input Shelf
Downlink Output Shelf
Uplink Input Shelf
Uplink Output Shelf
VHF Amplifier Shelf
UHF Lowband Amplifier Shelf
UHF Midband Amplifier Shelf
UHF Highband Amplifier Shelf
800MHz Amplifier Shelf
PSU
Qty Per
Assembly
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4.5.
Downlink Input Shelf 80-301407
Downlink Input Shelf 80-301407 is part of the main Splitter/Combiner assembly. Signals are received
from the radiating cable and are then split into their various separate paths before being amplified by
external band specific amplifiers The unit is housed in a 4U, 19” rack mount case which is mounted in
Rack 1
Downlink signals are received at the port labelled “DOWNLINK INPUT” (Annotated A in the picture in
section 4.5.4.1.) and there is a 30dB test port labelled “DOWNLINK INPUT TEST PORT” (B in section
4.5.4.1.).
Ports labelled 1 to 5 (C to G in section 4.5.4.1.) are the Downlink outputs to the amplification stages.
Downlink Input Shelf 80-301407 also incorporates bandpass filtering for the three UHF bands, the
filters are placed in the RF path before the outputs to the external amplification stages
4.5.1. Downlink Input Shelf 80-301407 System Schematic
Downlink Input Shelf
80-301407
02-010701
460.4 to 450.5MHz
02-010701
482.5 to 483.8MHz
07-005745
02-010901
507.0 to 507.3MHz
07-022005
07-004815
Downlink Input from leaky Feeder
Downlink Input Test Port (30dB Tap)
Port 1. Downlink VHF Output to VHF Amplifier Shelf 80-301409
Port 2. Downlink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410
Port 3. Downlink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410
Port 4. Downlink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410
Port 5. Downlink 800MHz Output to 800MHz Amplifier Shelf 80-301411
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
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4.5.2. Downlink Input Shelf 80-301407 Outline Drawing
Drawing Number 80-301497
Drawing also applies to Uplink Input Shelf 80-301407 and Uplink Output Shelf 80-301407
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
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4.5.3.
Downlink Input Shelf 80-301407 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
4.5.4.
4.5.4.1.
Downlink Input Shelf 80-301407 Illustrations
Rear View
DOWNLINK INPUT DOWNLINK INPUT
TEST PORT
Downlink Input from Radiating Cable
Downlink Input Test Port (30dB Tap)
Port 1. Downlink VHF Output to VHF Amplifier Shelf 80-301409
Port 2. Downlink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410
Port 3. Downlink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410
Port 4. Downlink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410
Port 5. Downlink 800MHz Output to 800MHz Amplifier Shelf 80-301411
Earth Connection
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
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Date 13/06/2008
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4.5.5. Downlink Input Shelf 80-301407 Major Sub Components
section
4.5.5.1.
4.5.5.2.
4.5.5.3.
4.5.5.4.
4.5.5.5.
4.5.5.1.
Component
Part
02-010701
02-010901
07-004815
07-005754
07-022005
Component Part Description
Qty Per
Assembly
Bandpass Filter
Bandpass Filter
Crossband Splitter/Coupler 550/800MHz
Crossband Splitter/Coupler VHF/UHF
30dB Bi-Directional Coupler
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 50ȍ 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
Passband UHF Low
Frequency UHF Mid
Downlink
Downlink
UHF Low
Bandwidth
UHF Mid
Number of sections
Insertion loss
VSWR
Connectors
Power Handling
Temperature
operation
range
storage
Weight
4.5.5.2.
SPECIFICATION
460.4 to 460.5 MHz
482.5 to 483.8 MHz
0.1 MHz
1.3 MHz
2.5 dB (typical)
better than 1.2:1
SMA
100W max
-20°C to +60°C
-40°C to +70°C
3 kg (typical)
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 50ȍ load at the input and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life and require
no maintenance.
Axell Wireless Limited
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Document Number 80-301401HBKM
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02-010901 specification
SPECIFICATION
Passband
Downlink
Frequency
Bandwidth
Downlink
Insertion Loss
Power Rating
Impedance
VSWR
Connectors
Weight
4.5.5.3.
PARAMETER
507.0 to 507.3MHz
0.3 MHz
2.9 dB (typical)
50W
50ȍ
Better than 1.2:1
SMA
3Kg (approximately)
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
Passband Frequencies
Insertion loss
Isolation between Bands
VSWR
Impedance
Power rating
operation
Temperature
range
storage
RF Connectors
Weight
4.5.5.4.
Low Pass Port
380 to 550MHz
<0.5dB
>50dB
High Pass Port
800 to 960MHz
<0.5dB
>50dB
1.3:1
50 ohm
50W
-20C to +60C
-40C to +70C
SMA (female)
<1kg
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.
Axell Wireless Limited
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07-005754 Specification
Parameter
Passband Frequencies
Insertion loss
Return loss
Isolation between Bands
Impedance
Power rating
operation
Temperature
range
storage
RF Connectors
Weight
4.5.5.5.
Low Pass Port
High Pass Port
70 to 175 MHz
380 to 500 MHz
<0.5dB
<0.5dB
>14dB typical
>14dB typical
>60dB
>60dB
50 ohm
50W
-20C to +60C
-40C to +70C
SMA (female)
<1kg
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
Frequency Range
Mainline Insertion Loss
Coupling Loss
Coupling Loss Tolerance
VSWR Mainline
Impedance
Power Handling (CW)
Outline (W x D x H)
Connectors
Case Material
Finish
Operating Temperature
Weather Protection
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
100kHz – 2.7GHz
< 1.0 dB
30 dB
+/-2.0 dB
Better than 1.4:1
50 ȍ
5W
44.5mm x 41mm x 27mm (ex. connectors)
SMA (female) on all ports
Aluminium
Iridite NCP
-20 to +55°C
IP54
L.A. M.T.A. Remote Sites
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Date 13/06/2008
Page 86 of 148
4.6.
Downlink Output Shelf 80-301408
Downlink Output Shelf 80-301408 is part of the main Splitter/Combiner assembly. Signals are
received from the various amplification stages and then combined into a single signal which is output
to the radiating cable. The unit is housed in a 4U, 19” rack mount case which is mounted in Rack 2
Ports labelled A to D (Annotated A to D in section 4.6.4.1.) are the Downlink inputs from the
amplification stages.
The Downlink signal leaves the Downlink Output Shelf 80-301408 for the radiating cable via the port
labelled “DOWNLINK OUTPUT” (F in section 4.6.4.1.) and there is a 30dB test port labelled
“DOWNLINK OUTPUT TEST PORT” (G in section 4.6.4.1.).
Downlink Output Shelf 80-301408 also incorporates bandpass filtering for the three UHF bands, the
filters are placed in the RF path before the outputs to the radiating cable.
4.6.1.
Downlink Output Shelf 80-301408 System Schematic
Downlink Output Shelf
80-301408
02-010701
460.4 to 450.5MHz
02-010701
482.5 to 483.8MHz
07-005745
02-010901
507.0 to 507.3MHz
07-004815
07-018005
Port A. Downlink VHF Input from VHF Amplifier Shelf 80-301409
Port B. Downlink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410
Port C. Downlink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410
Port D. Downlink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410
Port E. Downlink 800MHz Input from 800MHz Amplifier Shelf 80-301411
Downlink Output to Radiating Cable
Downlink Output Test Port (30dB Tap)
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
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Date 13/06/2008
Page 87 of 148
4.6.2.
Downlink Output Shelf 80-301408 Outline Drawing
Drawing Number 80-301498
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 88 of 148
4.6.3.
Downlink Output Shelf 80-301408 Specification
PARAMETER
SPECIFICATION
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
4.6.4.
4.6.4.1.
Downlink Output Shelf 80-301408 Illustrations
Rear View
Port A. Downlink VHF Input from VHF Amplifier Shelf 80-301409
Port B. Downlink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410
Port C. Downlink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410
Port D. Downlink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410
Port E. Downlink 800MHz Input from 800MHz Amplifier Shelf 80-301411
Downlink Output to Radiating Cable
Downlink Output Test Port (30dB Tap)
Earth Connection
Axell Wireless Limited
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Document Number 80-301401HBKM
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Date 13/06/2008
Page 89 of 148
4.6.5.
Section
4.5.5.1.
4.5.5.2.
4.5.5.3.
4.5.5.4.
4.5.5.1.
Downlink Output Shelf 80-301408 Major Sub Components
Component
Part
02-010701
02-010901
07-004815
07-005754
07-018005
Component Part Description
Bandpass Filter
Bandpass Filter
Crossband Splitter/Coupler 550/800MHz
Crossband Splitter/Coupler VHF/UHF
30dB Directional Coupler
Qty Per
Assembly
These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5 with the
exception of the 30dB Directional Coupler 07-018005 below
4.6.5.1.
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
Frequency Range 70 MHz - 1000MHz
Mainline Insertion Loss <0.5
Coupling Loss 30 dB
VSWR Mainline Better than 1.3:1
Impedance 50 ȍ
Power Handling (CW) 100W
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 -20C to +60C
Temperature
range
storage -40C to +70C
Weather Protection IP54
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 90 of 148
4.7.
Uplink Input Shelf 80-301407
Uplink Input Shelf 80-301407 is part of the main Splitter/Combiner assembly. Signals are received
from the leaky feeder and are then split into their various separate paths before being amplified by
external band specific amplifiers The unit is housed in a 4U, 19” rack mount case which is mounted in
Rack 1
Uplink signals are received at the port labelled “UPLINK INPUT” (Annotated A in the picture in section
4.7.4.1.) and there is a 30dB test port labelled “UPLINK INPUT TEST PORT” (B in section 4.7.4.1.).
Ports labelled F to J (Annotated C to G in section 4.7.4.1.) are the Uplink Outputs to the amplification
stages
Uplink Input Shelf 80-301407 also incorporates bandpass filtering for the three UHF bands, the filters
are placed in the RF path before the outputs to the external amplification stages
4.7.1.
Uplink Input Shelf 80-301407 System Schematic
Uplink Input Shelf
80-301407
02-010701
465.4 to 465.5MHz
02-010701
485.7 to 486.8MHz
07-005745
02-010901
510.0 to 510.3MHz
07-004815
07-022005
Uplink Input from Radiating Cable
Uplink Input Test Port (30dB Tap)
Port F. Uplink VHF Output to VHF Amplifier Shelf 80-301409
Port G. Uplink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410
Port H. Uplink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410
Port I. Uplink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410
Port J. Uplink 800MHz Output to 800MHz Amplifier Shelf 80-301411
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4.7.2.
Uplink Input Shelf 80-301407 Outline Drawing
Drawing Number 80-301497 – see section 4.5.2.
4.7.3.
Uplink Input Shelf 80-301407 Specification
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
4.7.4.
4.7.4.1.
Uplink Input Shelf 80-301407 Illustrations
Rear View
UPLINK INPUT
UPLINK INPUT
TEST PORT
Uplink Input from Radiating Cable
Uplink Input Test Port (30dB Tap)
Port F. Uplink VHF Output to VHF Amplifier Shelf 80-301409
Port G. Uplink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410
Port H. Uplink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410
Port I. Uplink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410
Port J. Uplink 800MHz Output to 800MHz Amplifier Shelf 80-301411
Earth Connection
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Document Number 80-301401HBKM
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Date 13/06/2008
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4.7.5.
section
4.5.5.1.
4.5.5.2.
4.5.5.3.
4.5.5.4.
4.5.5.5.
Uplink Input Shelf 80-301407 Major Sub Components
Component
Part
02-010701
02-010901
07-004815
07-005754
07-022005
Component Part Description
Bandpass Filter
Bandpass Filter
Crossband Splitter/Coupler 550/800MHz
Crossband Splitter/Coupler VHF/UHF
30dB Bi-Directional Coupler
Qty Per
Assembly
These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5.
Axell Wireless Limited
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Document Number 80-301401HBKM
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4.8.
Uplink Output Shelf 80-301407
Uplink Output Shelf 80-301407 is part of the main Splitter/Combiner assembly. Signals are received
from the various amplification stages and then combined into a single signal which is output to the
leaky feeder. The unit is housed in a 4U, 19” rack mount case which is mounted in Rack 1.
Ports labelled 6 to 10 (Annotated A to E in section 4.8.4.1.) are the Uplink inputs from the
amplification stages.
The Uplink signal leaves the Uplink Output Shelf 80-301407 for the leakey feeder via the port labelled
“UPLINK OUTPUT” (F in section 4.8.4.1.) and there is a 30dB test port labelled “UPLINK OUTPUT
TEST PORT” (G in section 4.8.4.1.).
4.8.1.
Uplink Output Shelf 80-301407 System Schematic
Uplink Output Shelf
80-301407
02-010701
465.4 to 465.5MHz
02-010701
485.7 to 486.8MHz
07-005745
02-010901
510.0 to 510.3MHz
07-022005
07-004815
Port 6. Uplink VHF Input from VHF Amplifier Shelf 80-301409
Port 7. Uplink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410
Port 8. Uplink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410
Port 9. Uplink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410
Port 10. Uplink 800MHz Input from 800MHz Amplifier Shelf 80-301411
Uplink Output to Radiating Cable
Uplink Output Test Port (30dB Tap)
Axell Wireless Limited
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4.8.2.
Uplink Output Shelf 80-301407 Outline Drawing
Drawing Number 80-301497 – see section 4.5.2.
4.8.3.
Uplink Output Shelf 80-301407 Specification
PARAMETER
SPECIFICATION
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
4.8.4.
4.8.4.1.
Uplink Output Shelf 80-301407 Illustrations
Rear View
Port 6. Uplink VHF Input from VHF Amplifier Shelf 80-301409
Port 7. Uplink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410
Port 8. Uplink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410
Port 9. Uplink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410
Port 10. Uplink 800MHz Input from 800MHz Amplifier Shelf 80-301411
Uplink Output to Radiating Cable
Uplink Output Test Port (30dB Tap)
Earth Connection
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4.8.5.
section
4.5.5.1.
4.5.5.2.
4.5.5.3.
4.5.5.4.
4.5.5.5.
Uplink Output Shelf 80-301407 Major Sub Components
Component
Part
02-010701
02-010901
07-004815
07-005754
07-022005
Component Part Description
Bandpass Filter
Bandpass Filter
Crossband Splitter/Coupler 550/800MHz
Crossband Splitter/Coupler VHF/UHF
30dB Bi-Directional Coupler
Qty Per
Assembly
These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5.
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4.9.
VHF Amplifier Shelf 80-301409
VHF Amplifier Shelf 80-301409 provides the amplification stages for the VHF paths, The unit is
housed in a 4U, 19” rack mount shelf which is mounted in Rack 1
The Downlink VHF signal is received at the port labelled “DOWNLINK I/P” (Annotated A in the picture
in section 4.9.4.2.). 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 Shelf via the port labelled “DOWNLINK O/P” ( B in section 4.9.4.2.).
The Uplink VHF Signal is received at the port labelled “UPLINK I/P” (C in section 4.9.4.2.). 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 Shelf via the port labelled “UPLINK O/P” (D in section 4.9.4.2.).
VHF Amplifier Shelf 80-301409 is provided with a 24V DC input to power the amplifier modules within
and those amplifier modules are configured to provide alarm status reports.
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4.9.1.
VHF Amplifier Shelf 80-301409 System Diagram
Drawing Number 80-301489
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4.9.2.
VHF Amplifier Shelf 80-301409 Outline Drawing
Drawing Number 80-301499
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4.9.3.
VHF Amplifier Shelf 80-301409 Specification
Parameter
Specification
Downlink
Downlink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Uplink
Uplink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Noise Figure
Mechanical Specification
Mechanical
RF Connectors
154.0 to 161.5MHz
30dB
0 to 30dB in 2dB steps
+34.0dBm
1dB below P1dB
+45.0dBm
155.5 – 161.0MHz
30dB
0 to 30dB in 2dB steps
+34.0dBm
+27dBm
+45.0dBm
< 10dB
4U, 19” Rack Mount
N-Type Female
Local Alarms to SCADA
Alarm Interfaces
Dry Contact with LED Indication per path
Power Supply 24V DC
4.9.4.
4.9.4.1.
VHF Amplifier Shelf 80-301409 Illustrations
Front View
Green LED “Power On”
Red LED “Alarm” VHF Uplink path
Red LED “Alarm” VHF Downlink path
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4.9.4.2.
Rear View
ALARM
DOWNLINK O/P
UPLINK O/P
DOWNLINK I/P
UPLINK I/P
FUSE T 3.15A
24v DC I/P
0dB
0dB
0dB
0dB
0dB
2dB
4dB
8dB
16dB
2dB
UPLINK
4.9.5.
Section
4.9.5.1.
4.9.5.2.
4.9.5.3.
4.9.5.4.
4.9.5.5.
4.9.5.6.
0dB
0dB
0dB
4dB
8dB
16dB
DOWNLINK
VHF Downlink Input from Downlink Input Shelf 80-301407 Port 1
VHF Downlink Output to Downlink Output Shelf 80-301408 Port A
VHF Uplink Input from Uplink Input Shelf 80-301407 Port F
VHF Uplink Output to Uplink Output Shelf 80-301407 Port 6
VHF Downlink Switched Attenuator 0 to 30 dB
VHF Uplink Switched Attenuator 0 to 30 dB
24V DC Input
3.15A Fuse for 24V DC Input
Alarm Output
Earth Connection
VHF Amplifier Shelf 80-301409 Major Sub Components
Component
Part
01-002503
10-000701
12-025602
17-001101
17-001201
20-001602
94-100004
Component Part Description
Bandpass Filter
Switched Attenuator 0.25Watt, 0 - 30dB
VHF Power Amplifier 5W
AGC Detector Assembly
AGC Attenuator Assembly
24V Dual Relay Assembly
Dual Diode Assembly
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4.9.5.1.
Bandpass Filter (01-002503)
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 helical 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 50ȍ load at the input and output ports.
Being passive devices, the bandpass filters 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. No adjustments should be attempted without full network sweep
analysis facilities to monitor both insertion loss and VSWR simultaneously.
01-002503 Specification
SPECIFICATION
Bandpass Downlink
Frequency
Uplink
Downlink
Bandwidth
Uplink
No. of sections
Insertion loss
VSWR
Connectors
Power handling
Temperature
operational
range
store
Weight
Size
4.9.5.2.
PARAMETER
154.0 MHz to 161.5 MHz
155.5 MHz to 161.0 MHz
7.5MHz
5.5MHz
1.2dB
Better than 1.2:1
SMA
100W maximum
-20°C to +60°C
-40°C to +70°C
3 kg
384 x 82.5 x 56.4mm
Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)
10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the
four miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are
designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and
output.
10-000701 Specification
PARAMETER
Attenuation Values
Attenuation Steps
Power Handling
Attenuation Accuracy
Frequency Range
Impedance
Connectors
VSWR
Weight
Temperature
operation
range
storage
Axell Wireless Limited
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Document Number 80-301401HBKM
SPECIFICATION
0-30dB
2, 4, 8 and 16dB
0.25 Watt
Âą 1.0 dB
DC to 1GHz
50ȍ
SMA
1.3:1
0.2kg
-20°C to +60°C
-40°C to +70°C
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4.9.5.3.
VHF Power Amplifier 5W (12-025602)
Power amplifier 12-025602 is a multi-stage, solid state power amplifier. Class A circuitry is employed
throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a
long, trouble free working lifetime. There is a Current Fault Alarm Function, which indicates failure of
each RF transistor with an open collector of a NPN transistor. A relay is fitted to indicate the failure by
voltage free change over the relay contacts.
The power amplifier should require no maintenance over its operating life. Under no circumstances
should the cover be removed or the side adjustments disturbed unless it is certain that the amplifier
has failed; since it is critically aligned during manufacture and any re-alignment will require extensive
test equipment.
The unit housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF
input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
12-025602 Specification
PARAMETER
Frequency range
Maximum RF output
Gain
1dB compression point
3rd order intercept point
In / RL
Out / RL
Noise Figure
Connectors
Supply
operational
Temperature
range
storage
SPECIFICATION
108 to 174 MHz (as required)
> 5Watts
t 34 dB
t +37 dBm
t +48 dBm
16 dB
15 dB
” 9.5 dB Max
SMA female
24 +/- 0.5 Vdc @ 1040 mA Max
-10qC to +60qC
-20qC to +70qC
7-Way Connector Pin-out details
Connector Pin
Signal
A1 (large pin)
+24V DC
A2 (large pin)
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
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4.9.5.4.
Automatic Gain Control
17-001101
17-001201
AGC Detector Assembly
AGC Attenuator Assembly
VHF Amplifier Shelf 80-301409 is fitted with two Automatic Gain Control (AGC) systems, one for the
Dwonlink amd one for the Uplink
The Automatic Gain Control system consists of two units, a detector/amplifier and an attenuator. The
detector/amplifier unit is inserted in the RF path on the output of the power amplifier, and the
attenuator is situated in the RF path before the amplification stage(s)
The attenuator comprises a 50ȍ P.I.N diode, voltage-variable attenuator with a range of 3 to 30dB.
The attenuation is controlled by a DC voltage which is derived from the associated detector controller
board.
Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors the RF level
being delivered by the power amplifier, and when a certain threshold is reached it begins to increase
the value of the attenuator to limit the RF output to the (factory set) threshold. Therefore overloading
of the power amplifier is avoided.
The factory set threshold is 1dB below the Enhancer 1dB compression point. Some adjustment of this
AGC threshold level is possible, a 10dB range is mostly achieved. It is not recommended under any
circumstances to adjust the AGC threshold to a level greater than the 1dB compression point as
system degradation will occur.
The detector comprises of a 50ȍ transmission line with a resistive tap which samples a small portion
of the mainline power. The sampled signal is amplified and fed to a conventional half wave diode
rectifier, the output of which is a DC voltage proportional to the RF input signal.
This DC voltage is passed via an inverting DC amplifier with integrating characteristics, to the output,
which drives the attenuation control line of the corresponding AGC attenuator. This unit is fitted at
some earlier point in the RF circuit.
For small signals, below AGC onset, the output control line will be close to 12V and the AGC
attenuator will have minimum attenuation. As the signal level increases the control line voltage will
fall, increasing the attenuator value and keeping the system output level at a constant value.
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4.9.5.5.
24V Relay Dual Assembly (20-001602)
The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the
isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with
completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity
protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can
destroy switching transistors or induce spikes on neighbouring circuits. Its common use is to
amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.
20-001602 Specification
PARAMETER
SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm Threshold Vcc - 1.20 volt +15%
Alarm output relay contacts:
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0ÂľA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x107 operations
Relay approval BT type 56
Connector details Screw terminals
Temperature operational -10°C to +60°C
range
storage -20°C to +70°C
4.9.5.6.
Dual Diode Assembly (94-100004)
The purpose of these dual diode assemblies is to allow two DC voltage sources to be combined, so
that the main DC rail within the equipment can be sourced from either a mains driven PSU, or
externally through an XLR connector or from dual mains driven PSUs . They are very heavy-duty
diodes and they prevent any reverse current from flowing back to their source or the alternative
supply rail. Combining diodes such as these will also be used if the equipment is to be powered from
external back-up batteries.
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4.10.
UHF Lowband Amplifier Shelf 80-301410
UHF Lowband Amplifier Shelf 80-301410 provides the amplification stages for the UHF Lowband
paths, The unit is housed in a 4U, 19” rack mount shelf which is mounted in Rack 1
The Downlink UHF Lowband signal is received at the port labelled “UHF DOWNLINK I/P” (Annotated
A in section 4.10.4.2.). 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 two 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 Shelf via the port labelled “UHF
DOWNLINK O/P” (B in section 4.10.4.2.).
The Uplink UHF Lowband signal is received at the port labelled “UHF UPLINK I/P” (Annotated C in
section 4.10.4.2.). 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 Shelf via the port labelled “UHF UPLINK O/P” (D in section
4.10.4.2.).
UHF Lowband Amplifier Shelf 80-301410 is provided with a 24V DC input to power the amplifier
modules within and those amplifier modules are configured to provide alarm status reports.
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4.10.1.
UHF Lowband Amplifier Shelf 80-301410 System Diagram
Drawing Number 80-301490
Axell Wireless Limited
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4.10.2.
UHF Lowband Amplifier Shelf 80-301410 Outline Drawing
Drawing Number 80-3014100
Axell Wireless Limited
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4.10.3.
UHF Lowband Amplifier Shelf 80-301410 Specification
Parameter
Specification
Downlink
Downlink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Uplink
Uplink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Noise Figure
Mechanical Specification
Mechanical
RF Connectors
460.4 to 460.5MHz
30dB
0 to 30dB in 2dB steps
+42.5dBm
1dB below P1dB
+53.5dBm
465.4 – 465.5MHz
30dB
0 to 30dB in 2dB steps
+36.5dBm
+27dBm
> +48.0dBm
< 3.0dB
4U 19” Rack Mount
N-Type Female
Local Alarms to SCADA
Alarm Interfaces
Dry Contact with LED Indication per path
Power Supply 24V DC
4.10.4.
4.10.4.1.
UHF Lowband Amplifier Shelf 80-301410 Illustrations
Front View
Green LED “Power On”
Red LED “Alarm” UHF Lowband Uplink path
Red LED “Alarm” UHF Lowband Downlink path
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4.10.4.2.
N.B.
Rear View
UPLINK
DOWNLINK
465.4 - 465.5 MHz
460.4 - 460.5 MHz
ALARM
UHF DOWNLINK O/P
UHF UPLINK O/P
UHF DOWNLINK I/P
UHF UPLINK I/P
FUSE T 10A
UPLINK
DOWNLINK
24v DC I/P
0dB
0dB
0dB
0dB
0dB
2dB
4dB
8dB
16dB
2dB
UPLINK
0dB
0dB
0dB
4dB
8dB
16dB
465.4 - 465.5 MHz
460.4 - 460.5 MHz
DOWNLINK
UHF Lowband Downlink Input from Downlink Input Shelf 80-301407 Port 2
UHF Lowband Downlink Output to Downlink Output Shelf 80-301408 Port B
UHF Lowband Uplink Input from Uplink Input Shelf 80-301407 Port G
UHF Lowband Uplink Output to Uplink Output Shelf 80-301407 Port 7
UHF Lowband Downlink Switched Attenuator 0 to 30 dB
UHF Lowband Uplink Switched Attenuator 0 to 30 dB
24V DC Input
10A Fuse for 24V DC Input
Alarm Output
Earth Connection
4.10.5.
UHF Lowband Amplifier Shelf 80-301410 Major Sub Components
Section
Component
Part
07-002908
10-000701
11-005401
12-016301
12-021601
12-021801
17-001101
17-001105
17-001201
20-001602
80-008909
94-100004
96-200024
4.10.5.1.
4.10.5.2.
4.10.5.3.
4.10.5.4.
4.10.5.5.
4.10.5.6.
4.10.5.7.
4.10.5.8.
4.10.5.9.
4.10.5.10.
4.10.5.11.
Component Part Description
30dB Directional Coupler
Switched Attenuator 0.25Watt, 0 - 30dB
Low Noise Amplifier
20W Power Amplifier
TETRA Power Amplifier 5W
TETRA Power Amplifier 1W
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
24V Dual Relay Assembly
12V Relay Assembly
Dual Diode Assembly
DC/DC Converter
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4.10.5.1.
30dB Directional Coupler (07-002908)
The purpose of these couplers is to tap off known portions of RF signal from transmission lines and to
combine them, for example through splitter units for different purposes (alarms/monitoring etc.), whilst
maintaining an accurate 50: load to all ports/interfaces throughout the specified frequency range.
They are known as directional couplers as they couple power from the RF mainline in one direction
only.
Directional Coupler 07-002908 is configured to tap off 30dB.
07-002908 Specification
PARAMETER
Frequency range
Insertion loss
Coupling level
Rejection
Weight
Connectors
Temperature
operation
range
storage
4.10.5.2.
SPECIFICATION
50 - 1000MHz
<0.3dB
-30dB
N/A
<200gms
N type, female
-20°C to +60°C
-40°C to +70°C
Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)
10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the
four miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are
designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and
output.
10-000701 Specification
PARAMETER
Attenuation Values
Attenuation Steps
Power Handling
Attenuation Accuracy
Frequency Range
Impedance
Connectors
VSWR
Weight
Temperature
operation
range
storage
Axell Wireless Limited
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Document Number 80-301401HBKM
SPECIFICATION
0-30dB
2, 4, 8 and 16dB
0.25 Watt
Âą 1.0 dB
DC to 1GHz
50ȍ
SMA
1.3:1
0.2kg
-20°C to +60°C
-40°C to +70°C
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4.10.5.3.
Low Noise Amplifier (11-005401)
The 15dB gain low noise amplifier used in the unit is a double stage solid-state low noise amplifier.
Class A circuitry is used throughout the units to ensure excellent linearity over a very wide dynamic
range. The active devices are very moderately rated to provide a long trouble-free working life. There
are no adjustments on these amplifiers, and in the unlikely event of a failure, the complete amplifier
should be replaced. The amplifier is housed in an aluminium case (Iridite NCP finish) with SMA
connectors for the RF input/output and a 9way D-type for DC and alarm outputs.
11-005401 Specification
PARAMETER
Frequency range
Bandwidth
1dB compression point
3rd order intercept
Gain
VSWR
Input return loss
Noise figure
Connectors
Supply
Temperature
operational
range
storage
Size
Weight
SPECIFICATION
380 - 500MHz
<100MHz (as required, tuneable)
>+20dBm
>+33dBm
>15.5dB (typical)
better than 1.5:1
>14dB
<2.0dB (typical)
SMA female
115mA at 12V DC
-10°C to +60°C
-40°C to +70°C
88 x 50 x 34mm (ex. connectors)
0.26kg
LNA ‘D’ Connector Pin-out details
Connector pin
Signal
+ve input (10-24V)
GND
Alarm relay O/P bad
Alarm relay common
Alarm relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
9-Way Pin-Out Graphical Representation
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4.10.5.4.
TETRA Power Amplifier 20W (12-016301)
This amplifier is a Class A 20W power amplifier from 380MHz to 470MHz in a 1 stage balanced
configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It
has built in a Current Fault Alarm Function.
It is housed is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function. Note the large
diameter DC power input pins (1 & 2) fitted to reduce volt-drop/arcing.
12-016301 Specification
PARAMETER
Frequency range
Small signal gain
Gain flatness
I/O Return loss
1dB compression point
OIP3
Supply voltage
Supply current
Temperature operational
range
storage
Weight
SPECIFICATION
380-470MHz
23dB
Âą1.7dB
>18dB
43dBm
55dBm
24V DC
3.8Amps (Typical)
-10°C to +60°C
-20°C to +70°C
<2kg (no heatsink)
7-Way Connector Pin-out details
Connector Pin
Signal
A1 (large pin)
+10-24V DC
A2 (large pin)
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
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4.10.5.5.
TETRA Power Amplifier 5W (12-021601)
Power amplifier 12-021601 is a multi-stage, solid state power amplifier. Class A circuitry is employed
throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semiconductor devices are very conservatively rated to ensure low device junction temperatures and a
long, trouble free working lifetime.
The power amplifier should require no maintenance over its operating life. Under no circumstances
should the cover be removed or the side adjustments disturbed unless it is certain that the amplifier
has failed; since it is critically aligned during manufacture and any re-alignment will require extensive
test equipment.
The unit housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF
input/output and a D-Type connector for the power supply and the Current Fault Alarm Function.
12-021601 Specification
PARAMETER
Frequency range:
Bandwidth:
Maximum RF output:
Gain:
1dB compression point:
3rd order intercept point:
VSWR:
Connectors:
Supply:
Weight:
operational:
Temperature
range:
storage:
SPECIFICATION
380-470MHz (as required)
10-40MHz (typical, tuned to spec.)
5Watts
30dB
+37.5dBm
+50dBm
better than 1.5:1
SMA female
1.9Amps @ 12V DC
1kg (excluding heatsink)
-10qC to +60qC
-20qC to +70qC
7-Way Connector Pin-out details
Connector Pin
Signal
A1 (large pin)
+10-24V DC
A2 (large pin)
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
7-Way Pin-Out Graphical Representation
A1
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3.10.5.6.
Low Power Amplifier (1Watt) (12-021801)
The low power amplifier used is a 1 stage balanced configuration, solid-state amplifier. Class A
circuitry is used in the unit to ensure excellent linearity over a very wide dynamic range. The three
active devices are very moderately rated to provide a long trouble-free working life.
Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function.
There are no adjustments on this amplifier, and in the unlikely event of failure then the entire amplifier
should be replaced.
12-021801 Specification
PARAMETER
SPECIFICATION
-20 to +70 qC
380 - 500 MHz
15.5 +/- 0.5 dB
0.7 dB p-p Max
0.7 dB Max
20 dB Min
20 dB Min
30.5 dBm Min
41.5 dBm Min
6 dB Max
10-15 Vdc
540 mA Max
-10qC to +60qC
-40qC to +100qC
<0.5 kg
110.5 x 66mm x 24.6mm
Temperature
Frequency Range
Small Signal Gain
Gain Flatness
'Gain vs. Temperature
In RL
Out RL
Output Power @ 1dB Compression Point
Output 3rd Order IP
Noise Figure
DC Supply Voltage
DC Supply Current
Temperature
operational:
range
storage:
Weight:
Size:
9-Way Connector Pin-outs
Connector pin
Signal
+ve input (10-15V)
GND
Alarm relay O/P bad
Alarm relay common
Alarm relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
9-Way Pin-Out Graphical Representation
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4.10.5.7.
Automatic Gain Control
17-001101
17-001105
17-001201
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
The three UHF Amplifier Shelves 80-301410 (Lowband, Midband and Highband) are each fitted with
two differing types of Automatic Gain Control (AGC) system, one linear, and one logarithmic. The
Downlink UHF paths are fitted with logarithmic detector (17-001105), and attenuator (17-001201) the
Uplink UHF paths are fitted with linear detector (17-001101) and attenuator (17-001201)
The Automatic Gain Control system consists of two units, a detector/amplifier and an attenuator. The
detector/amplifier unit is inserted in the RF path on the output of the power amplifier, and the
attenuator is situated in the RF path before the amplification stage(s)
The attenuator comprises a 50ȍ P.I.N diode, voltage-variable attenuator with a range of 3 to 30dB.
The attenuation is controlled by a DC voltage which is derived from the associated detector controller
board.
Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors the RF level
being delivered by the power amplifier, and when a certain threshold is reached it begins to increase
the value of the attenuator to limit the RF output to the (factory set) threshold. Therefore overloading
of the power amplifier is avoided.
The factory set threshold is 1dB below the Enhancer 1dB compression point. Some adjustment of this
AGC threshold level is possible, a 10dB range is mostly achieved. It is not recommended under any
circumstances to adjust the AGC threshold to a level greater than the 1dB compression point as
system degradation will occur.
The detector comprises of a 50ȍ transmission line with a resistive tap which samples a small portion
of the mainline power. The sampled signal is amplified and fed to a conventional half wave diode
rectifier, the output of which is a DC voltage proportional to the RF input signal.
This DC voltage is passed via an inverting DC amplifier with integrating characteristics, to the output,
which drives the attenuation control line of the corresponding AGC attenuator. This unit is fitted at
some earlier point in the RF circuit.
For small signals, below AGC onset, the output control line will be close to 12V and the AGC
attenuator will have minimum attenuation. As the signal level increases the control line voltage will
fall, increasing the attenuator value and keeping the system output level at a constant value.
Axell Wireless Limited
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4.10.5.8.
24V Relay Dual Assembly (20-001602)
The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the
isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with
completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity
protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can
destroy switching transistors or induce spikes on neighbouring circuits. Its common use is to
amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.
20-001602 Specification
PARAMETER
SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm Threshold Vcc - 1.20 volt +15%
Alarm output relay contacts:
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0ÂľA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x107 operations
Relay approval BT type 56
Connector details Screw terminals
Temperature operational -10°C to +60°C
range
storage -20°C to +70°C
4.10.5.9.
12V Relay Assembly 80-008909
Relay Board (80-008909) allows the inversion of signals and the isolation of circuits. It is equipped
with a single dual pole change-over relay RL1, with completely isolated wiring, accessed via a 15 way
in-line connector.
The relay is provided with polarity protection diodes and diodes for suppressing the transients caused
by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring circuits.
It’s common use is to amalgamate all the alarm signals into one, volts-free relay contact pair for the
main alarm system. This relay board also carries an LED to serve as a “Status OK” indicator which is
illuminated during normal operation.
80-008909 Specification
PARAMETER
SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm threshold Vcc - 1.20 volt +15%
Alarm output relay contacts
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0ÂľA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x107 operations
Relay approval BT type 56
Connector details Screw terminals
Temperature
operational -10°C to +60°C
range
storage -20°C to +70°C
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4.10.5.10.
Dual Diode Assembly (94-100004)
The purpose of these dual diode assemblies is to allow two DC voltage sources to be combined, so
that the main DC rail within the equipment can be sourced from either a mains driven PSU, or
externally through an XLR connector or from dual mains driven PSUs . They are very heavy-duty
diodes and they prevent any reverse current from flowing back to their source or the alternative
supply rail. Combining diodes such as these will also be used if the equipment is to be powered from
external back-up batteries.
4.10.5.11.
DC/DC Converter, 24V in, 12V 5A out (96-200024)
This unit it is an O.E.M high power device with a 5 amp @ 12V (60Watts) output capability used to
derive a 12V fixed voltage power supply rail from a 24V supply. In the event of failure this unit should
not be repaired, only replaced.
96-200024 Specification
PARAMETER
Input Voltage range
Output voltage
Max. current load
Temperature operation
range
storage
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
18-28V DC
12VÂą0.5V
5.0 Amps
-10°C to +60°C
-20°C to +70°C
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4.11.
UHF Midband Amplifier Shelf 80-301410
UHF Midband Amplifier Shelf 80-301410 provides the amplification stages for the UHF Midband
paths, The unit is housed in a 4U, 19” rack mount shelf which is mounted in Rack 1
The Downlink UHF Midband signal is received at the port labelled “UHF DOWNLINK I/P” (Annotated
A in section 4.11.4.2.). 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 Midband amplification
stage is provided by two 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 Midband signal exits the Shelf via the port labelled “UHF
DOWNLINK O/P” (B in section 4.11.4.2.).
The Uplink UHF Midband signal is received at the port labelled “UHF UPLINK I/P” (Annotated C in
section 4.11.4.2.). 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 Midband 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 Midband signal exits the Shelf via the port labelled “UHF UPLINK O/P” (D in section
4.11.4.2.).
UHF Midband Amplifier Shelf 80-301410 is provided with a 24V DC input to power the amplifier
modules within and those amplifier modules are configured to provide alarm status reports.
Axell Wireless Limited
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4.11.1.
UHF Lowband Amplifier Shelf 80-301410 System Diagram
Drawing Number 80-301490 see section 4.10.1.
4.11.2.
UHF Midband Amplifier Shelf 80-301410 Outline Drawing
Drawing Number 80-3014100 see section 4.10.2.
4.11.3.
UHF Midband Amplifier Shelf 80-301410 Specification
Parameter
Specification
Downlink
Downlink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Uplink
Uplink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Noise Figure
Mechanical Specification
Mechanical
RF Connectors
482.5 to 483.8MHz
30dB
0 to 30dB in 2dB steps
+42.5dBm
1dB below P1dB
+53.5dBm
485.7 to 486.8MHz
30dB
0 to 30dB in 2dB steps
+36.5dBm
+27dBm
+48.0dBm
< 3.0dB
4U 19” Rack Mount
N-Type Female
Local Alarms to SCADA
Alarm Interfaces
Dry Contact with LED Indication per path
Power Supply 24V DC
4.11.4.
4.11.4.1.
UHF Lowband Amplifier Shelf 80-301410 Illustrations
Front View
Green LED “Power On”
Red LED “Alarm” UHF Midband Uplink path
Red LED “Alarm” UHF Midband Downlink path
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4.11.4.2.
N.B.
Rear View
UPLINK
DOWNLINK
485.7 - 486.8 MHz
482.5 - 483.8 MHz
ALARM
UHF DOWNLINK O/P
UHF UPLINK O/P
UHF DOWNLINK I/P
UHF UPLINK I/P
FUSE T 10A
UPLINK
DOWNLINK
24v DC I/P
0dB
0dB
0dB
0dB
0dB
2dB
4dB
8dB
16dB
2dB
UPLINK
0dB
0dB
0dB
4dB
8dB
16dB
485.7 - 486.8 MHz
482.5 - 483.8 MHz
DOWNLINK
UHF Midband Downlink Input from Downlink Input Shelf 80-301407 Port 3
UHF Midband Downlink Output to Downlink Output Shelf 80-301408 Port C
UHF Midband Uplink Input from Uplink Input Shelf 80-301407 Port H
UHF Midband Uplink Output to Uplink Output Shelf 80-301407 Port 8
UHF Midband Downlink Switched Attenuator 0 to 30 dB
UHF Midband Uplink Switched Attenuator 0 to 30 dB
24V DC Input
10A Fuse for 24V DC Input
Alarm Output
Earth Connection
4.11.5.
UHF Midband Amplifier Shelf 80-301410 Major Sub Components
The components for the UHF Midband Amplifier Shelf 80-301410 are exactly the same as those for
UHF Lowband Amplifier Shelf 80-301410 in section 4.10.5
Section
4.10.5.1.
4.10.5.2.
4.10.5.3.
4.10.5.4.
4.10.5.5.
4.10.5.6.
4.10.5.7.
4.10.5.8.
4.10.5.9.
4.10.5.10.
4.10.5.11.
Component
Part
07-002908
10-000701
11-005401
12-016301
12-021601
12-021801
17-001101
17-001105
17-001201
20-001602
80-008909
94-100004
96-200024
Component Part Description
30dB Directional Coupler
Switched Attenuator 0.25Watt, 0 - 30dB
Low Noise Amplifier
20W Power Amplifier
TETRA Power Amplifier 5W
TETRA Power Amplifier 1W
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
24V Dual Relay Assembly
12V Relay Assembly
Dual Diode Assembly
DC/DC Converter
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4.12.
UHF Highband Amplifier Shelf 80-301410
UHF Highband Amplifier Shelf 80-301410 provides the amplification stages for the UHF Highband
paths, The unit is housed in a 4U, 19” rack mount shelf which is mounted in Rack 1
The Downlink UHF Highband signal is received at the port labelled “UHF DOWNLINK I/P” (Annotated
A in section 4.12.4.2.). 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 Highband amplification
stage is provided by two 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 Highband signal exits the Shelf via the port labelled “UHF
DOWNLINK O/P” (B in section 4.12.4.2.).
The Uplink UHF Highband signal is received at the port labelled “UHF UPLINK I/P” (Annotated C in
section 4.12.4.2.). 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 Highband 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 Highband signal exits the Shelf via the port labelled “UHF UPLINK O/P” (D in section
4.12.4.2.).
UHF Highband Amplifier Shelf 80-301410 is provided with a 24V DC input to power the amplifier
modules within and those amplifier modules are configured to provide alarm status reports.
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4.12.1.
UHF Highband Amplifier Shelf 80-301410 System Diagram
Drawing Number 80-301490 see section 4.10.1.
4.12.2.
UHF Highband Amplifier Shelf 80-301410 Outline Drawing
Drawing Number 80-3014100 see section 4.10.2.
4.12.3.
UHF Highband Amplifier Shelf 80-301410 Specification
Parameter
Specification
Downlink
Downlink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Uplink
Uplink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Noise Figure
Mechanical Specification
Mechanical
RF Connectors
507.0 to 507.3MHz
30dB
0 to 30dB in 2dB steps
+42.5dBm
1dB below P1dB
+53.5dBm
510.0 to 510.3MHz
30dB
0 to 30dB in 2dB steps
+36.5dBm
+27dBm
+48.0dBm
< 3.0dB
4U 19” Rack Mount
N-Type Female
Local Alarms to SCADA
Alarm Interfaces
Dry Contact with LED Indication per path
Power Supply 24V DC
4.12.4.
4.12.4.1.
UHF Highband Amplifier Shelf 80-301410 Illustrations
Front View
Green LED “Power On”
Red LED “Alarm” UHF Highband Uplink path
Red LED “Alarm” UHF Highband Downlink path
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4.12.4.2.
N.B.
Rear View
UPLINK
DOWNLINK
510.0 - 510.3 MHz
507.0 - 507.3 MHz
ALARM
UHF DOWNLINK O/P
UHF UPLINK O/P
UHF DOWNLINK I/P
UHF UPLINK I/P
FUSE T 10A
UPLINK
DOWNLINK
24v DC I/P
0dB
0dB
0dB
0dB
0dB
0dB
0dB
0dB
2dB
4dB
8dB
16dB
2dB
4dB
8dB
16dB
UPLINK
510.0 - 510.3 MHz
507.0 - 507.3 MHz
DOWNLINK
UHF Highband Downlink Input from Downlink Input Shelf 80-301407 Port 4
UHF Highband Downlink Output to Downlink Output Shelf 80-301408 Port D
UHF Highband Uplink Input from Uplink Input Shelf 80-301407 Port I
UHF Highband Uplink Output to Uplink Output Shelf 80-301407 Port 9
UHF Highband Downlink Switched Attenuator 0 to 30 dB
UHF Highband Uplink Switched Attenuator 0 to 30 dB
24V DC Input
10A Fuse for 24V DC Input
Alarm Output
Earth Connection
4.12.5.
UHF Highband Amplifier Shelf 80-301410 Major Sub Components
The components for the UHF Highband Amplifier Shelf 80-301410 are exactly the same as those for
UHF Lowband Amplifier Shelf 80-301410 in section 4.10.5
Section
4.10.5.1.
4.10.5.2.
4.10.5.3.
4.10.5.4.
4.10.5.5.
4.10.5.6.
4.10.5.7.
4.10.5.8.
4.10.5.9.
4.10.5.10.
4.10.5.11.
Component
Part
07-002908
10-000701
11-005401
12-016301
12-021601
12-021801
17-001101
17-001105
17-001201
20-001602
80-008909
94-100004
96-200024
Component Part Description
30dB Directional Coupler
Switched Attenuator 0.25Watt, 0 - 30dB
Low Noise Amplifier
20W Power Amplifier
TETRA Power Amplifier 5W
TETRA Power Amplifier 1W
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
24V Dual Relay Assembly
12V Relay Assembly
Dual Diode Assembly
DC/DC Converter
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4.13.
800MHz Amplifier Shelf 80-301411
800MHz Amplifier Shelf 80-301411 provides the amplification stages for the 800 MHz paths, The unit
is housed in an 8U, 19” rack mount shelf which is mounted in Rack 2
The Downlink 800MHz signal is received at the port labelled “DOWNLINK INPUT” (Annotated A in the
picture in section 4.13.4.2.). The Downlink 800MHz 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
the Attenuator the signal passes through the first of two amplification stages. This first stage is
provided by a low noise amplifier which gives approximately 19dB of gain.
After the Low Noise Amplifier the Downlink 800MHz signal passes through the second amplification
stage; the signal is first split into two equal paths and then each path is passed through a 20W power
amplifier and then the two signal paths are re-combined. The second stage amplifiers are straddled
by an Automatic Gain Control assembly providing limiting to the output signals in the case of high
input signals.
After leaving the second stage amplifiers the Downlink 800MHz signal path passes through a second
bandpass filter and exits the Shelf via the port labelled “DOWNLINK OUTPUT” ( B in section
4.13.4.2.).
The Uplink 800MHz Signal is received at the port labelled “UPLINK INPUT” (C in section 4.13.4.2.).
The Uplink 800MHz path passes through a bandpass filter to remove out of band noise and then into
the first of two amplification stages, the first stage is provided by a low noise amplifier which gives
approximately 19dB of gain; after leaving the Low Noise Amplifier the signal passes through a
switched attenuator providing 0 to 30 dB of RF signal attenuation,
After leaving the switched attenuator the Uplink 800MHz path passes through the second stage of
amplification which is provided by a 5W power amplifier giving approx. 30dB of gain; this second
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 second amplification stage the Uplink 800MHz path passes through a second
bandpass filter and exits the Shelf via the port labelled “UPLINK OUTPUT” (D in section 4.13.4.2.).
800MHz Amplifier Shelf 80-301411 is provided with a 24V DC input to power the amplifier modules
within and those amplifier modules are configured to provide alarm status reports.
Axell Wireless Limited
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4.13.1.
800MHz Amplifier Shelf 80-301411 System Diagram
Drawing Number 80-301491
Axell Wireless Limited
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4.13.2.
800MHz Amplifier Shelf 80-301411 Outline Drawing
Drawing Number 80-3014101
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4.13.3.
800MHz Amplifier Shelf 80-301411 Specification
Parameter
Specification
Downlink
Downlink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Uplink
Uplink Passband
Maximun gain
Gain Adjustment
1dB Compression Point (P1dB)
ALC setting
3rd Order Intercept point
Noise Figure
Mechanical Specification
Mechanical
RF Connectors
856.0 to 861.0MHz
30dB
0 – 30dB in 2dB steps
+44.0dBm
1dB below P1dB
+54.0dBm
811.0 to 816.0MHz
30dB
0 to 30dB in 2dB steps
+36.0dBm
+27dBm
+46.0 dBm
< 5.0 dB
8U 19” Rack Mount
N-Type Female
Local Alarms to SCADA
Alarm Interfaces
Dry Contact with LED Indication per path
Power Supply 24V DC
4.13.4.
4.13.4.1.
800MHz Amplifier Shelf 80-301411 Illustrations
Front View
ALARM
UPLINK
POWER
ALARM
DOWNLINK
Green LED “Power On”
Red LED “Alarm” 800MHz Downlink path
Red LED “Alarm” 800MHz Uplink path
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4.13.4.2.
Rear View
DOWNLINK
OUTPUT
UPLINK
OUTPUT
800 MHz
DOWNLINK
INPUT
UPLINK
INPUT
ALARM
DOWNLINK
UPLINK
0dB
0dB
0dB
0dB
0dB
0dB
0dB
0dB
2dB
4dB
8dB
16dB
2dB
4dB
8dB
16dB
FUSE 20A
24V DC I/P
800MHz Downlink Input from Downlink Input Shelf 80-301407 Port 5
800MHz Downlink Output to Downlink Output Shelf 80-301408 Port E
800MHz Uplink Input from Uplink Input Shelf 80-301407 Port J
800MHz Uplink Output to Uplink Output Shelf 80-301407 Port 10
Downlink Switched Attenuator 0 to 30 dB
Uplink Switched Attenuator 0 to 30 dB
24V DC Input
20A Fuse for 24V DC Input
Alarm Output
Earth Connection
4.13.5.
Section
4.13.5.1.
4.13.5.2.
4.13.5.3.
4.13.5.4.
4.13.5.5.
4.13.5.6.
4.13.5.7.
4.13.5.8.
4.13.5.9.
4.13.5.10.
4.13.5.11.
800MHz Amplifier Shelf 80-301411 Major Sub Components
Component
Part
02-011601
05-002602
07-002907
10-000701
11-005902
12-018601
12-020501
17-001101
17-001105
17-001201
20-001602
94-100004
96-200024
Component Part Description
Bandpass FIlter
Splitter/Combiner, 20W
30dB Directional Coupler
Switched Attenuator 0.25Watt, 0 - 30dB
Low Noise Amplifier
5W Power Amplifier
20W Power Amplifier
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
24V Relay Dual Assembly
Dual Diode Assembly
DC/DC Converter, 24V in, 12V 5A out
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
Qty Per
Assembly
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4.13.5.1.
Bandpass Filter (02-011601)
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 50ȍ 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.
02-011601 Specification
PARAMETER
Frequency
Downlink
Range
Uplink
Downlink
Bandwidth
Uplink
Number of Sections
Insertion Loss
VSWR
Connectors
Power Handling
Temperature operation
range
storage
Weight
4.13.5.2.
SPECIFICATION
856 to 861MHz
811 to 816MHz
5 MHz
5 MHz
1.2 dB
better than 1.2:1
SMA
100W max
-10°C to +55°C
-40°C to +70°C
3 kg (typical)
Splitter/Combiner (05-002602)
The Splitter/Combiner used is a device for accurately matching two or more RF signals to single or
multiple ports, whilst maintaining an accurate 50: load to all inputs/outputs and ensuring that the
VSWR and insertion losses are kept to a minimum. Any unused ports should be terminated with an
appropriate 50: load.
Being passive devices, the splitters should have an extremely long operational life and require no
maintenance. Should a unit be suspect, it is usually most time efficient to replace the whole module
rather than attempt repair or re-tuning.
05-002602 Specification
PARAMETER
Frequency Range
Bandwidth
Ports
Insertion loss
Return loss input & output
Impedance
Isolation
MTFB
Splitting
Power rating
Combining
Connectors
Weight
Size
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
856 – 861MHz
5MHz
3.3dB
1.3:1
50ȍ
>20dB
>180,000 hours
20Watts
0.5Watt
SMA female
200g (approximately)
54 x 44 x 21mm
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4.13.5.3.
30dB Directional Coupler (07-002907)
The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from
transmission lines nband to combine them, for example through splitter units for different purposes
(alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the
specified frequency range. They are known as directional couplers as they couple power from the RF
mainline in one direction only.
07-002907 Specification
PARAMETER
Frequency range
Insertion loss
Coupling level
Rejection
Weight
Connectors
Temperature
operation
range
storage
4.13.5.4.
SPECIFICATION
800 - 1000MHz
<0.3dB
-30dB Âą0.5dB
N/A
<200g
SMA, female
-20°C to +60°C
-40°C to +70°C
Switched Attenuator 0.25Watt, 0 - 30dB (10-000701)
10-000701 provides attenuation from 0 to 30dB in 2 dB steps The attenuation is simply set using the
four miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are
designed to maintain an accurate 50ȍ impedance over their operating frequency at both input and
output.
10-000701 Specification
PARAMETER
Attenuation Values
Attenuation Steps
Power Handling
Attenuation Accuracy
Frequency Range
Impedance
Connectors
VSWR
Weight
Temperature
operation
range
storage
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
0-30dB
2, 4, 8 and 16dB
0.25 Watt
Âą 1.0 dB
DC to 1GHz
50ȍ
SMA
1.3:1
0.2kg
-20°C to +60°C
-40°C to +70°C
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4.13.5.5.
Low Noise Amplifier (11-005902)
The Gallium-Arsenide low noise amplifier used in the unit is a double stage, solid-state low noise
amplifier. Class A circuitry is used throughout the units to ensure excellent linearity and extremely low
noise over a very wide dynamic range. The active devices are very moderately rated to provide a long
trouble-free working life. There are no adjustments on these amplifiers, and in the unlikely event of a
failure, then the complete amplifier should be replaced.
This amplifier features its own in-built alarm system which gives a volt-free relay contact type alarm
that is easily integrated into any alarm system. There is a Current Fault Alarm Function, which
indicates failure of each one or both RF transistors by a various alarm output options. The amplifier is
housed in an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and a
9way D-type for DC and alarm outputs.
11-005902 Specification
PARAMETER
Frequency range
Bandwidth
Gain
1dB compression point
OIP3
Input/output return loss
Noise figure
Power consumption
Supply voltage
Connectors
Temperature
operational
range
storage
Size
Weight
SPECIFICATION
800 – 960MHz
<170MHz
19.5dB (typical)
+21dBm
+33dBm
>20dB
1dB (typical)
190mA @ 24V DC
10-24V DC
SMA female
-10°C to +60°C
-40°C to +70°C
90 x 55 x 30.2mm
0.28kg
LNA ‘D’ Connector Pin-out details
Connector pin
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
Signal
+Ve input (10-24V)
GND
Alarm relay O/P bad
Alarm relay common
Alarm relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
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4.13.5.6.
5W Power Amplifier (12-018601)
This amplifier is a Class A 5W power amplifier from 800MHz to 960MHz in a 1 stage balanced
configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It
has built in a Current Fault Alarm Function.
Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function.
12-018601 Specification
PARAMETER
Frequency range
Small signal gain
Gain flatness
I/O Return loss
1dB compression point
OIP3
Supply voltage
Supply current
Temperature operational
range
storage
Weight
SPECIFICATION
800-960MHz
30dB
Âą0.5dB
>20dB
+37dBm
+52dBm
12V DC
2.0Amps (typical)
-10°C to +60°C
-20°C to +70°C
<2kg (no heatsink)
PA 7-Way Connector Pin-outs
Connector Pin
A1 (large pin)
A2 (large pin)
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
Signal
+12V DC
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
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4.13.5.7.
20W Power Amplifier (12-020501)
This amplifier is a Class A 20W power amplifier from 800-960MHz in a 1 stage balanced
configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It
has built in a Current Fault Alarm Function.
Its housing is an aluminium case (Iridite NCP finish) with SMA connectors for the RF input/output and
a D-Type connector for the power supply and the Current Fault Alarm Function.
12-020501 Specification
PARAMETER
Frequency range
Small signal gain
Gain flatness
I/O Return loss
1dB compression point
OIP3
Supply voltage
Supply current
Temperature operational
range
storage
Weight
SPECIFICATION
800-960MHz
31.5dB
Âą0.6dB
>18dB
+43.5dBm
+54dBm
24V DC
4.6Amps @12V(typical)
-10°C to +60°C
-20°C to +70°C
<2kg (no heatsink)
PA 7-Way Connector Pin-outs
Connector Pin
A1 (large pin)
A2 (large pin)
Signal
+24V DC
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
7-Way Connector Graphical Representation
A1
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A2
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4.13.5.8.
Automatic Gain Control
17-001101
17-001105
17-001201
AGC Detector Assembly
AGC Detector Assembly (Logarithmic)
AGC Attenuator Assembly
800MHz Amplifier Shelf 80-301411 is fitted with two differing types of Automatic Gain Control (AGC)
system, one linear, and one logarithmic. The Downlink 800MHz path is fitted with logarithmic detector
(17-001105), and attenuator (17-001201) the Uplink 800MHz path is fitted with linear detector (17001101) and attenuator (17-001201)
The Automatic Gain Control system consists of two units, a detector/amplifier and an attenuator. The
detector/amplifier unit is inserted in the RF path on the output of the power amplifier, and the
attenuator is situated in the RF path before the amplification stage(s)
The attenuator comprises a 50ȍ P.I.N diode, voltage-variable attenuator with a range of 3 to 30dB.
The attenuation is controlled by a DC voltage which is derived from the associated detector controller
board.
Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors the RF level
being delivered by the power amplifier, and when a certain threshold is reached it begins to increase
the value of the attenuator to limit the RF output to the (factory set) threshold. Therefore overloading
of the power amplifier is avoided.
The factory set threshold is 1dB below the Enhancer 1dB compression point. Some adjustment of this
AGC threshold level is possible, a 10dB range is mostly achieved. It is not recommended under any
circumstances to adjust the AGC threshold to a level greater than the 1dB compression point as
system degradation will occur.
The detector comprises of a 50ȍ transmission line with a resistive tap which samples a small portion
of the mainline power. The sampled signal is amplified and fed to a conventional half wave diode
rectifier, the output of which is a DC voltage proportional to the RF input signal.
This DC voltage is passed via an inverting DC amplifier with integrating characteristics, to the output,
which drives the attenuation control line of the corresponding AGC attenuator. This unit is fitted at
some earlier point in the RF circuit.
For small signals, below AGC onset, the output control line will be close to 12V and the AGC
attenuator will have minimum attenuation. As the signal level increases the control line voltage will
fall, increasing the attenuator value and keeping the system output level at a constant value.
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4.13.5.9.
24V Relay Dual Assembly (20-001602)
The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the
isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with
completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity
protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can
destroy switching transistors or induce spikes on neighbouring circuits. Its common use is to
amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.
20-001602 Specification
PARAMETER
SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm Threshold Vcc - 1.20 volt +15%
Alarm output relay contacts:
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0ÂľA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x107 operations
Relay approval BT type 56
Connector details Screw terminals
Temperature operational -10°C to +60°C
range
storage -20°C to +70°C
4.13.5.10.
Dual Diode Assembly (94-100004)
The purpose of these dual diode assemblies is to allow two DC voltage sources to be combined, so
that the main DC rail within the equipment can be sourced from either a mains driven PSU, or
externally through an XLR connector or from dual mains driven PSUs . They are very heavy-duty
diodes and they prevent any reverse current from flowing back to their source or the alternative
supply rail. Combining diodes such as these will also be used if the equipment is to be powered from
external back-up batteries.
4.13.5.11.
DC/DC Converter, 24V in, 12V 5A out (96-200024)
This unit it is an O.E.M high power device with a 5 amp @ 12V (60Watts) output capability used to
derive a 12V fixed voltage power supply rail from a 24V supply. In the event of failure this unit should
not be repaired, only replaced.
96-200024 Specification
PARAMETER
Input Voltage range
Output voltage
Max. current load
Temperature operation
range
storage
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
SPECIFICATION
18-28V DC
12VÂą0.5V
5.0 Amps
-10°C to +60°C
-20°C to +70°C
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4.14
PSU 96-300064
96-300064 is an O.E.M. PSU – there are two housed in a 2U rack mount assembly at the bottom of
Rack 1. We does not recommend any invasive procedures for these O.E.M. power supplies. In case
of failure, they are not to be repaired, only replaced.
96-300064 Specification
Voltages
Frequency
Voltage
Maximum current
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
AC Input Supply
110 or 220V nominal
90 to 132 or 180 to 264V (absolute limits)
47 to 63Hz
DC Output Supply:
24V DC (nominal)
22 to 26V (absolute limits)
40A
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5.
INSTALLATION
5.1
Installation Record
When this equipment is initially commissioned, please use the equipment set-up record sheet in
Appendix B. This will help both the installation personnel and Axell Wireless Ltd. should these figures
be needed for future reference or diagnosis.
5.2
General Remarks
The size and weight of the equipment racks mean that they represent a significant topple hazard
unless they are bolted to the floor though the mounting holes in the base of the unit. In the interests of
safety this should be done before any electrical, RF, or optical connections are made.
The equipment must be located on a flat, level surface that is made from a material suitable for
bearing the weight of the rack assembly. If the installer is in any doubt about the suitability of a site it
is recommended that he consult with an appropriately qualified Structural Engineer.
It is important in determining the location of the rack within the room that space is allowed for access
to the front and rear of the equipment. To enable maintenance to be carried out, the doors must be
able to fully open.
The location must be served with a duct to allow the entry of cables into the rack.
5.3
Electrical Connections
The mains power supply is connected to the terminal strip located on the bulkhead at the rear of the
equipment at floor level. It is recommended that the connection is made by a qualified electrician, who
must satisfy himself that the supply will be the correct voltage and of sufficient capacity.
All electrical and RF connection should be completed and checked prior to power being applied for
the first time.
Ensure that connections are kept clean and are fully tightened.
5.4
RF Connections
All RF connections are made to the cable termination, located on the bulkhead at the rear of the
equipment at floor level. Care must be taken to ensure that the correct connections are made with
particular attention made to the base station TX/RX ports. In the event that the base transmitter is
connected to the RX output of the rack, damage to the equipment will be done if the base station
transmitter is then keyed.
Ensure that connections are kept clean and are fully tightened.
5.5
Optical Connections
The optical input and output ports will be located on the appropriate E/O shelf as shown in the rack
layout drawing and the system layout drawing. The ports are supplied with a green plastic cover,
which must be removed prior to the connection of the fibre cable. Ensure that transmitter and receiver
fibre cable are identified to prevent misconnection. At the master site, the fibre transmitters are in the
downlink path with the receivers in the uplink. At the remote sites the fibre transmitters are in the
uplink with the receivers in the downlink.
Ensure that connections are kept clean and are fully tightened.
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5.6
Commissioning
Once all connections are made the equipment is ready for commissioning.
To commission the system the test equipment detailed in Section 6.2 will be required.
Using the system diagrams and the end-to-end test specification, the equipment should be tested to
ensure correct operation. Typical RF levels that are not listed in the end-to-end specification, such as
input levels to the fibre transmitters are detailed in the maintenance section of this manual.
On initial power up the system alarm indicators on the front panels of the equipment should be
checked. A red LED illuminated indicates a fault in that particular tray that must be investigated before
proceeding with the commissioning. A green LED on each shelf illuminates, to indicate that the power
supply is connected to the shelf
In the event that any part of the system does not function correctly as expected, check all connections
to ensure that they are to the correct port, that the interconnecting cables are not faulty and that they
are tightened. The majority of commissioning difficulties arise from problems with the interconnecting
cables and connectors.
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6.
MAINTENANCE
6.1
Fault Finding
6.1.1
Quick Fault Checklist
All tunnel equipment is individually tested to specification prior to despatch. Failure of this type of
equipment is not common. Experience has shown that a large number of fault conditions relating to
tunnel installations result from simple causes often occurring as result of transportation, unpacking
and installation. Below are listed some common problems which have resulted in poor performance or
an indicated non-functioning of the equipment.
6.1.2
Mains power not connected or not switched on.
External connectors not fitted or incorrectly fitted.
Internal connectors becoming loose due to transport vibration.
Wiring becoming detached as a result of heavy handling.
Input signals not present due to faults in the antenna and feeder system.
Base transmissions not present due to fault at the base station.
Modems fitted with incorrect software configuration.
Changes to channel frequencies and inhibiting channels.
Hand held radio equipment not set to repeater channels.
Hand held radio equipment not set to correct base station.
Fault Isolation
In the event that the performance of the system is suspect, a methodical and logical approach to the
problem will reveal the cause of the difficulty. The System consists of modules fitted in enclosed
shelves within a rack mounted, environmentally protected enclosure.
Transmissions from the main base stations are passed though the system to the mobile radio
equipment; this could be a handheld radio or a transceiver in a vehicle. This path is referred to as the
downlink. The return signal path from the mobile radio equipment to the base station is referred to as
the uplink.
The first operation is to check the alarms of each of the active units and determine that the power
supplies to the equipment are connected and active.
This can be achieved remotely (via the volt free dry contact outputs to SCADA), or locally with the
front panel LEDs. The green LED on the front panel should be illuminated, while any red alarm
indicators should be off. If an Alarm is on, then that individual shelf must be isolated and individually
tested against the original test specification.
The individual amplifier units within the shelf have a green LED showing through a hole in their piggyback alarm board, which is illuminated if the unit is working correctly. If an amplifier is suspect, check
the DC power supply to the unit. If no other fault is apparent use a spectrum analyser to measure the
incoming signal level at the input and then after reconnecting the amplifier input, measure the output
level. Consult with the system diagram to determine the expected gain and compare result.
In the event that there are no alarms on and all units appear to be functioning it will be necessary to
test the system in a systematic manner to confirm correct operation.
6.1.3
Downlink
Confirm that there is a signal at the expected frequency and strength from the base station. If this is
not present then the fault may lay outside the system. To confirm this, inject a downlink frequency
signal from a known source at the Downlink input and check for the expected RF output.
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If a signal is not received at the output it will be necessary to follow the downlink path through the
system to find a point at which the signal is lost. The expected downlink output for the given input can
be found in the end-to-end test specification.
6.1.4
Uplink
Testing the uplink involves a similar procedure to the downlink except that the frequencies used are
those transmitted by the mobile equipment.
6.1.5
Checking service
Following the repair of any part of the system it is recommended that a full end-to-end test is carried
out in accordance with the test specification and that the coverage is checked by survey.
It is important to bear in mind that the system includes a radiating cable network and base stations
that may be faulty or may have been damaged.
6.1.6
Fault repair
Once a faulty component has been identified, a decision must be made on the appropriate course to
carry out a repair. A competent engineer can quickly remedy typical faults such as faulty connections
or cables. The exceptions to this are cable assemblies connecting bandpass filter assemblies that are
manufactured to critical lengths to maintain a 50-ohm system. Care should be taken when replacing
cables or connectors to ensure that items are of the correct specification. The repair of component
modules such as amplifiers and bandpass filters will not usually be possible in the field, as they
frequently require specialist knowledge and test equipment to ensure correct operation. It is
recommended that items of this type are replaced with a spare unit and the faulty unit returned to
Axell Wireless Ltd for repair.
6.1.7
Service Support
Advice and assistance with maintaining and servicing this system are available by contacting Axell
Wireless Ltd
NOTE
Individual modules are not intended to be repaired on site and attempts at repair will invalidate active
warranties. Company policy is that individual modules should be repaired by replacement. Axell
Wireless Ltd. maintains a level of stock of most modules which can usually be despatched at short
notice to support this policy.
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6.2
Tools & Test Equipment
The minimum tools and test equipment needed to successfully service this Axell product are as
followsSpectrum analyser
100kHz to 2GHz (Dynamic range = 90dB).
Signal Generator
30MHz to 2GHz (-120dBm to 0dBm o/p level).
Attenuator
20dB, 10W, DC-2GHz, (N male – N female).
Test Antenna
Yagi or dipole for operating frequency.
Digital multi-meter
Universal Volt-Ohm-Amp meter.
Test cable x 2
N male – N male, 2M long RG214.
Test cable x 2
SMA male – N male, 1m long RG223.
Hand tools
Philips #1&2 tip screwdriver.
3mm flat bladed screwdriver.
SMA spanner and torque setter.
6.3
Care of Modules
6.3.1
General Comments
Many of the active modules contain semiconductor devices utilising MOS technology, which can be
damaged by electrostatic discharge. Correct handling of such modules is mandatory to ensure their
long-term reliability.
To prevent damage to a module, it must be withdrawn/inserted with care. The module may have
connectors on its underside, which might not be visible to the service operative.
6.3.2
Module Removal (LNAs, general procedure)
The following general instructions should be followed to remove a module
Remove power to the unit
Remove all visible connectors (RF, DC & alarm)
Release module retaining screws.
Slowly but firmly, pull the module straight out of its position. Take care not to twist/turn the
module during withdrawal. (When the module is loose, care may be needed, as there may be
concealed connections underneath).
6.3.3
Module Replacement (general)
Carefully align the module into its location then slowly push the module directly straight into its
position, taking care not to twist/turn it during insertion.
Reconnect all connectors, RF, alarm, power etc., (concealed connectors may have to be
connected first).
Replace retaining screws (if any).
Double-check all connections before applying power.
6.3.4
Power Amplifiers
1)
Remove power to the unit. (Switch off at mains/battery, or remove DC in connector)
2)
Remove alarm wires from alarm screw terminal block or disconnect multi-way alarm
connector.
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3)
Carefully disconnect the RF input and output coaxial connectors (usually SMA)
If alarm board removal is not required, go to step 5.
4)
There is (usually) a plate attached to the alarm board which fixes it to the amplifier, remove its
retaining screws and the alarm board can be withdrawn from the amplifier in its entirety. On
certain types of amplifier the alarm board is not mounted on a dedicated mounting plate; in this
case it will have to firstly be removed by unscrewing it from the mounting pillars, in most
cases, the pillars will not have not have to be removed before lifting the amplifier.
5)
If the amplifier to be removed has a heatsink attached, there may be several different ways it
can have been assembled. The most commonly used method, is screws through the front of
the heatsink to threaded screw holes (or nuts and bolts), into the amplifier within the main
case. If the heatsink is mounted on the rear of the main case (e.g., against a wall in the case
of wall mounted enclosures), then the fixing method for the heatsink will be from within the
case, (otherwise the enclosure would have to be removed from the wall in order to remove the
heatsink).
When the heatsink has been removed, the amplifier may be unscrewed from the main casing by its
four corner fixings and gently withdrawn.
Fitting a new power amplifier module will be the exact reverse of the above.
Note Do not forget to apply fresh heatsink compound to the heatsink/main case joint and
also between the amplifier and the main case.
6.3.5
Low Power Amplifier Replacement
Disconnect the mains power supply and disconnect the 24V dc supply connector for the LPA.
Disconnect the RF input and output cables from the LPA.
Disconnect the alarm connector.
Remove the alarm monitoring wires from (D type connector) pins 9 and 10.
Remove the LPA module by removing the four retaining screws, replace with a new LPA
module and secure it with the screws.
Connect the RF cables to the LPA input and output connectors. Reconnect the wires to the
alarm board connector pins 9 and 10.
Reconnect the DC supply connector and turn the mains switch on.
Note Tighten SMA connectors using only a dedicated SMA torque spanner. If SMA connectors are
over-tightened, irreparable damage will occur. . Do not use adjustable pliers to loosen/tighten SMA
connectors.
Also take care not to drop or knock the module as this can damage (or misalign in the case of tuned
passive modules) sensitive internal components. Always store the modules in an environmentally
friendly location
6.3.6
Module Transportation
To maintain the operation, performance and reliability of any module it must be stored and
transported correctly. Any module not installed in a whole system must be kept in an anti-static bag or
container. These bags or containers are normally identified by being pink or black, and are often
marked with an ESD label. Any module sent back to Axell for investigation/repair must be so
protected. Please contact Axell’s quality department before returning a module.
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 143 of 148
Appendix A
A.1.
Glossary of Terms used in this document
Cell Enhancer or
Repeater
Band Selective
Repeater
Channel Selective
Repeater
AC
AGC
BBU
BTS
CEMS
C/NR
DC
Downlink (D/L)
FO
GND
ID
LED
LNA
LPA
MOU
M.S.
MTBF
N/A
N/C
OFR
OIP3
P1dB
PA
RF
RSA
RX
S/N
TX
Uplink (U/L)
VSWR
WDM
A Radio Frequency (RF) amplifier which can simultaneously
amplify and re-broadcast Mobile Station (MS) and Base
Transceiver Station (BTS) signals.
A Cell Enhancer designed for operation on a range of channels
within a specified frequency band.
A Cell Enhancer, designed for operation on specified channel(s)
within a specified frequency band. Channel frequencies may be
factory set or on-site programmable.
Alternating Current
Automatic Gain Control
Battery Backup Unit
Base Transceiver Station
Coverage Enhanced Management System
Carrier-to-Noise Ratio
Direct Current
RF signals TX from the BTS to the Master Site
Fibre Optic
Ground
Identification Number
Light Emitting Diode
Low Noise Amplifier
Low Power Amplifier
Master Optical Unit
Mobile Station
Mean Time Between Failures
Not Applicable
No Connection
On Frequency Repeater
Output Third Order Intercept Point
1dB Compression Point
Power Amplifier
Radio Frequency
Receiver/Splitter Amplifier
Receiver
Serial Number
Transmitter
RF signals transmitted from the MS to the BTS
Voltage Standing Wave Ratio
Wave division multiplex
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 144 of 148
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
Issue No. 1
Date 13/06/2008
L.A. M.T.A. Remote Sites
Page 145 of 148
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A.2.
Key to Drawing Symbols used in this document
A.3.
EC Declaration of Conformity
In accordance with BS EN ISO/IEC 17050-1&-2:2004
Aerial Facilities Limited
Aerial House
Asheridge Road
Chesham
Buckinghamshire HP5 2QD
United Kingdom
DECLARES, UNDER OUR SOLE RESPONSIBILITY THAT THE FOLLOWING PRODUCT:
PRODUCT DESCRIPTION AND PART NO[S]
In-Line Bi-Directional Amplifier (Wall Mount) 80-301401
In-Line Bi-Directional Amplifier (Rack Mount) 80-301406
IN ACCORDANCE WITH THE FOLLOWING DIRECTIVES:
1999/5/EC
The Radio & Telecommunications Terminal Equipment Directive Annex V
and its amending directives
HAS BEEN DESIGNED AND MANUFACTURED TO THE FOLLOWING STANDARD[S] OR
OTHER NORMATIVE DOCUMENT[S]:
BS EN 60950
Information technology equipment.
Safety. General requirements
ETS EN 301 489-1 EMC standard for radio equipment and services.
Part 1. Common technical requirements
I hereby declare that the equipment named above has been designed to comply with the relevant
sections of the above referenced specifications. The unit complies with all essential requirements
of the Directives.
SIGNED
B. S. BARTON
OPERATIONS DIRECTOR
DATE: 21/01/2008
Registered Office: Aerial House, Asheridge Road, Chesham, Buckinghamshire, HP5 2QD England Registered No. 4042808 (England)
www.axellwireless.com
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 146 of 148
A.4.
Amendment List Record Sheet
Issue
No.
Date
21/01/2008
Incorporated
by
AJS
13/06/2008
AJS
Page Nos.
Amended
Reason for new issue
Draft
Issue
Document Ref. 80-301401HBKM
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 147 of 148
APPENDIX B
B.1.
INITIAL EQUIPMENT SET-UP CALCULATIONS
GENERAL INFORMATION
Client Name
Site Name
Date
AWL Equip. Model No.
Model
ANTENNA SYSTEMS
Gain
Azimuth
Comments
Type
Loss
Comments
A - Service Antenna
B – Donor Antenna
Length
C – Service Feeder
D – Donor Feeder
INITIAL PARAMETERS
dBm
dB
dBm
E – CE Output Power
F – Antenna Isolation
G – Input signal level from donor BTS
Operating Voltage
Parameter
Input signal level (G)
CE max. o/p power (E)
Gain setting
Isolation required
Service antenna gain (A)
Service antenna feeder loss (C)
Effective radiated power (ERP)
Attenuator setting
DOWNLINK CALCULATIONS
Comments
Value
dBm
dBm
dB
dB
dB
dB
dBm
dB
E-G
(Gain + 10dB)
E+A-C
CE gain-gain setting
If the input signal level in the uplink path is known and steady, use the following calculation table to
determine the gain setting. If the CE features Automatic Gain Control the attenuator should be set to
zero and if not, then the attenuation setting for both uplink and downlink should be similar.
Parameter
Input signal level
CE max. o/p power (E)
Gain setting
Required isolation
Donor antenna gain (B)
Donor antenna feeder loss (D)
Effective radiated power (ERP)
Attenuator setting
UPLINK CALCULATIONS
Comments
Value
E+B-D
(CE gain-gain setting)
Axell Wireless Limited
Technical Literature
Document Number 80-301401HBKM
dBm
dBm
dB
dB
dB
dB
dBm
dB
L.A. M.T.A. Remote Sites
Issue No. 1
Date 13/06/2008
Page 148 of 148
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