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

Axell Wireless 80-301403 Cell Enhancer

Manual

Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 1 of 148 L.A. M.T.A. BDA Line Amplifier User/Maintenance Handbook ForGETS 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 777002info@axellwireless.com www.axellwireless.comAXELL WIRELESS SWEDEN Box 7139 174 07 Sundbyberg Sweden Tel: + 46 (0) 8 475 4700 Fax: + 46 (0) 8 475 4799
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 2 of 148 Table of Contents 1. INTRODUCTION.......................................................................................................................... 71.1. Scope and Purpose of Document............................................................................................. 71.2. Limitation of Liability Notice ...................................................................................................... 72. SAFETY CONSIDERATIONS ...................................................................................................... 82.1. Earthing of Equipment .............................................................................................................. 82.2. Electric Shock Hazard............................................................................................................... 82.3. RF Radiation Hazard ................................................................................................................ 82.4. Lifting and other Health and Safety Recommendations............................................................ 82.5. Chemical Hazard ...................................................................................................................... 92.6. Laser safety .............................................................................................................................. 92.7. Emergency Contact Numbers...................................................................................................93. IN-LINE BDA WALL MOUNT 80-301401................................................................................... 103.1. In-Line BDA Wall Mount 80-301401 Specification.................................................................. 113.1.1. In-Line BDA Wall Mount 80-301401 Overall system Diagram.......................................... 123.2. In-Line BDA Wall Mount 80-301401 List of Major Components ............................................. 133.3. Combiner 80-301402 .............................................................................................................. 133.3.1. Combiner 80-301402 System Diagram ............................................................................ 143.3.2. Combiner 80-301402 Outline Drawing ............................................................................. 153.3.3. Combiner 80-301402 Specification ..................................................................................163.3.4. Combiner 80-301402 Photographs .................................................................................. 173.3.4.1. Front View.................................................................................................................. 173.3.4.2. Underside view showing RF connectors.................................................................... 183.3.4.3. Interior view ............................................................................................................... 193.3.5. Combiner 80-301402 Major Sub-Components................................................................. 203.3.5.1. Bandpass Filter 02-010701........................................................................................ 203.3.5.2. Bandpass Filter 02-010901........................................................................................ 203.3.5.3. Crossband Splitter/Coupler 550/800MHz (07-004815).............................................. 213.3.5.4. Crossband Splitter/Coupler VHF/UHF (07-005754)................................................... 213.3.5.5. 30dB Directional Coupler (07-018005) ...................................................................... 223.3.5.6. 30dB Bi-Directional Coupler (07-022005).................................................................. 233.4. VHF/UHF BDA Unit (80-301403) ............................................................................................ 243.4.1. VHF/UHF BDA Unit (80-301403) System Diagram.......................................................... 253.4.2. VHF/UHF BDA Unit (80-301403) Outline Drawing........................................................... 263.4.3. VHF/UHF BDA Unit(80-301403) Specification ................................................................. 273.4.4. VHF/UHF BDA Unit(80-301403) Photographs ................................................................. 283.4.4.1. Front View.................................................................................................................. 283.4.4.2. Underside view showing connectors ......................................................................... 293.4.4.3. Interior view ............................................................................................................... 303.4.5. VHF/UHF BDA Unit(80-301403) Major Sub-components ................................................ 313.4.5.1. Bandpass Filter (01-002503) ..................................................................................... 313.4.5.2. 30dB Directional Coupler (07-002908) ...................................................................... 323.4.5.3. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ............................................... 323.4.5.4. Low Noise Amplifier (11-005401) .............................................................................. 333.4.5.5. TETRA Power Amplifier 20W (12-016301) ................................................................ 343.4.5.6. TETRA Power Amplifier 5W (12-021601) .................................................................. 353.4.5.7. Low Power Amplifier (1Watt) (12-021801)................................................................. 363.4.5.8. VHF Power Amplifier 5W (12-025602)....................................................................... 373.4.5.9. Automatic Gain Control.............................................................................................. 383.4.5.10. 24V Relay Dual Assembly (20-001602) ................................................................... 383.4.5.11. 24V Relay Assembly (80-008902) ........................................................................... 393.4.5.12. Dual Diode Assembly (94-100004) .......................................................................... 393.4.5.13. DC/DC Converter, 24V in, 12V 5A out (96-200024) ................................................ 403.5. UHF BDA Unit (80-301404) ....................................................................................................413.5.1. UHF BDA Unit (80-301404) System Diagram .................................................................. 423.5.2. UHF BDA Unit (80-301404) Outline Drawing ................................................................... 43
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 3 of 148 3.5.3. UHF BDA Unit (80-301404) Specification ........................................................................ 443.5.4. UHF BDA Unit (80-301404) Photographs ........................................................................ 453.5.4.1. Front View.................................................................................................................. 453.5.4.2. Underside view showing connectors ......................................................................... 463.5.4.3. Interior view ............................................................................................................... 473.5.5. UHF BDA Unit (80-301404) Major Sub-components ....................................................... 483.5.5.1. 30dB Directional Coupler (07-002908) ...................................................................... 483.5.5.2. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ............................................... 483.5.5.3. Low Noise Amplifier (11-005401) .............................................................................. 493.5.5.4. TETRA Power Amplifier 20W (12-016301) ................................................................ 503.5.5.5. TETRA Power Amplifier 5W (12-021601) .................................................................. 513.5.5.6. Low Power Amplifier (12-021801).............................................................................. 523.5.5.7. DC/DC Converter, 24V in, 12V 8A out (13-003011) .................................................. 533.5.5.8. Automatic Gain Control.............................................................................................. 533.5.5.9. 24V Relay Dual Assembly (20-001602)..................................................................... 543.5.5.10. 24V Relay Assembly (80-008909) ........................................................................... 543.5.5.11. Dual Diode Assembly (94-100004) .......................................................................... 553.6. 800MHz BDA UNIT (80-301405) ............................................................................................ 563.6.1. 800MHz BDA UNIT (80-301405) System Diagram .......................................................... 573.6.2. 800MHz BDA UNIT (80-301405) Outline Drawing ........................................................... 583.6.3. 800MHz BDA UNIT (80-301405) Specification ................................................................ 593.6.4. 800MHz BDA UNIT (80-301405) Photographs ................................................................ 603.6.4.1. Front View.................................................................................................................. 603.6.4.2. Underside view showing connectors ......................................................................... 603.6.4.3. Interior view ............................................................................................................... 613.6.5. 800MHz BDA UNIT (80-301405) Major Sub-components................................................ 623.6.5.1. Bandpass Filter (02-011601) ..................................................................................... 623.6.5.2. Splitter/Combiner (05-002602) .................................................................................. 633.6.5.3. 30dB Directional Coupler (07-002907) ...................................................................... 633.6.5.4. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ............................................... 643.6.5.5. Low Noise Amplifier (11-005902) .............................................................................. 643.6.5.6. 5W Power Amplifier (12-018601)............................................................................... 653.6.5.7. 20W Power Amplifier (12-020501)............................................................................. 663.6.5.8. Automatic Gain Control.............................................................................................. 673.6.5.9. 24V Relay Dual Assembly (20-001602)..................................................................... 673.6.5.10. Dual Diode Assembly (94-100004) .......................................................................... 683.6.5.11. DC/DC Converter, 24V in, 12V 5A out (96-200024) ................................................ 684. IN-LINE BDA RACK MOUNT 80-301406................................................................................... 694.1. In-Line BDA Rack Mount System Diagrams ........................................................................... 714.1.1. Overall System Diagram....................................................................................................... 714.1.2. Combiners System Diagram.................................................................................................724.2. In-Line BDA Rack Mount 80-301406 Specification................................................................. 734.3. In-Line BDA Rack Mount 80-301406 Illustrations................................................................... 744.3.1. Rack 1 Front View ................................................................................................................ 744.3.2. Rack 1 Rear View............................................................................................................. 754.3.3. Rack 2 Front View ............................................................................................................ 764.3.4. Rack 2 Rear View............................................................................................................. 774.3.5. Rack 1 Top View .............................................................................................................. 784.3.6. Rack 2 Top View .............................................................................................................. 794.4. In-Line BDA Rack Mount 80-301401 List of Major Components ............................................ 804.5. Downlink Input Shelf 80-301407............................................................................................. 814.5.1. Downlink Input Shelf 80-301407 System Schematic............................................................ 814.5.2. Downlink Input Shelf 80-301407 Outline Drawing................................................................ 824.5.3. Downlink Input Shelf 80-301407 Specification ................................................................. 834.5.4. Downlink Input Shelf 80-301407 Illustrations ................................................................... 834.5.4.1. Rear View .................................................................................................................. 834.5.5. Downlink Input Shelf 80-301407 Major Sub Components.................................................... 844.5.5.1. Bandpass Filter (02-010701) ..................................................................................... 844.5.5.2. Bandpass Filter 02-010901........................................................................................ 84
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 4 of 148 4.5.5.3. Crossband Splitter/Coupler 550/800MHz (07-004815).............................................. 854.5.5.4. Crossband Splitter/Coupler VHF/UHF (07-005754)................................................... 854.5.5.5. 30dB Bi-Directional Coupler (07-022005).................................................................. 864.6. Downlink Output Shelf 80-301408 .......................................................................................... 874.6.1. Downlink Output Shelf 80-301408 System Schematic ........................................................ 874.6.2. Downlink Output Shelf 80-301408 Outline Drawing ............................................................ 884.6.3. Downlink Output Shelf 80-301408 Specification .............................................................. 894.6.4. Downlink Output Shelf 80-301408 Illustrations ................................................................ 894.6.4.1. Rear View .................................................................................................................. 894.6.5. Downlink Output Shelf 80-301408 Major Sub Components............................................. 904.6.5.1. 30dB Directional Coupler (07-018005) ...................................................................... 904.7. Uplink Input Shelf 80-301407.................................................................................................. 914.7.1. Uplink Input Shelf 80-301407 System Schematic ............................................................ 914.7.2. Uplink Input Shelf 80-301407 Outline Drawing ................................................................ 924.7.3. Uplink Input Shelf 80-301407 Specification...................................................................... 924.7.4. Uplink Input Shelf 80-301407 Illustrations........................................................................ 924.7.4.1. Rear View .................................................................................................................. 924.7.5. Uplink Input Shelf 80-301407 Major Sub Components .................................................... 934.8. Uplink Output Shelf 80-301407...............................................................................................944.8.1. Uplink Output Shelf 80-301407 System Schematic ......................................................... 944.8.2. Uplink Output Shelf 80-301407 Outline Drawing.............................................................. 954.8.3. Uplink Output Shelf 80-301407 Specification................................................................... 954.8.4. Uplink Output Shelf 80-301407 Illustrations ..................................................................... 954.8.4.1. Rear View .................................................................................................................. 954.8.5. Uplink Output Shelf 80-301407 Major Sub Components ................................................. 964.9. VHF Amplifier Shelf 80-301409 .............................................................................................. 974.9.1. VHF Amplifier Shelf 80-301409 System Diagram ............................................................ 984.9.2. VHF Amplifier Shelf 80-301409 Outline Drawing ............................................................. 994.9.3. VHF Amplifier Shelf 80-301409 Specification ................................................................ 1004.9.4. VHF Amplifier Shelf 80-301409 Illustrations................................................................... 1004.9.4.1. Front View................................................................................................................ 1004.9.4.2. Rear View ................................................................................................................ 1014.9.5. VHF Amplifier Shelf 80-301409 Major Sub Components ............................................... 1014.9.5.1. Bandpass Filter (01-002503) ................................................................................... 1024.9.5.2. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ............................................. 1024.9.5.3. VHF Power Amplifier 5W (12-025602)..................................................................... 1034.9.5.4. Automatic Gain Control............................................................................................ 1044.9.5.5. 24V Relay Dual Assembly (20-001602)................................................................... 1054.9.5.6. Dual Diode Assembly (94-100004).......................................................................... 1054.10. UHF Lowband Amplifier Shelf 80-301410 ......................................................................... 1064.10.1. UHF Lowband Amplifier Shelf 80-301410 System Diagram ....................................... 1074.10.2. UHF Lowband Amplifier Shelf 80-301410 Outline Drawing ........................................ 1084.10.3. UHF Lowband Amplifier Shelf 80-301410 Specification ............................................. 1094.10.4. UHF Lowband Amplifier Shelf 80-301410 Illustrations................................................ 1094.10.4.1. Front View .............................................................................................................. 1094.10.4.2. Rear View............................................................................................................... 1104.10.5. UHF Lowband Amplifier Shelf 80-301410 Major Sub Components ............................ 1104.10.5.1. 30dB Directional Coupler (07-002908)................................................................... 1114.10.5.2. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ........................................... 1114.10.5.3. Low Noise Amplifier (11-005401)........................................................................... 1124.10.5.4. TETRA Power Amplifier 20W (12-016301) ............................................................ 1134.10.5.5. TETRA Power Amplifier 5W (12-021601) .............................................................. 1143.10.5.6. Low Power Amplifier (1Watt) (12-021801) ............................................................. 1154.10.5.7. Automatic Gain Control .......................................................................................... 1164.10.5.8. 24V Relay Dual Assembly (20-001602) ................................................................. 1174.10.5.9. 12V Relay Assembly 80-008909............................................................................ 1174.10.5.10. Dual Diode Assembly (94-100004) ...................................................................... 1184.10.5.11. DC/DC Converter, 24V in, 12V 5A out (96-200024) ............................................ 1184.11. UHF Midband Amplifier Shelf 80-301410 .......................................................................... 119
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 5 of 148 4.11.1. UHF Lowband Amplifier Shelf 80-301410 System Diagram ....................................... 1204.11.2. UHF Midband Amplifier Shelf 80-301410 Outline Drawing ......................................... 1204.11.3. UHF Midband Amplifier Shelf 80-301410 Specification .............................................. 1204.11.4. UHF Lowband Amplifier Shelf 80-301410 Illustrations................................................ 1204.11.4.1. Front View .............................................................................................................. 1204.11.4.2. Rear View............................................................................................................... 1214.11.5. UHF Midband Amplifier Shelf 80-301410 Major Sub Components............................. 1214.12. UHF Highband Amplifier Shelf 80-301410......................................................................... 1224.12.1. UHF Highband Amplifier Shelf 80-301410 System Diagram ...................................... 1234.12.2. UHF Highband Amplifier Shelf 80-301410 Outline Drawing ....................................... 1234.12.3. UHF Highband Amplifier Shelf 80-301410 Specification............................................. 1234.12.4. UHF Highband Amplifier Shelf 80-301410 Illustrations............................................... 1234.12.4.1. Front View .............................................................................................................. 1234.12.4.2. Rear View............................................................................................................... 1244.12.5. UHF Highband Amplifier Shelf 80-301410 Major Sub Components ........................... 1244.13. 800MHz Amplifier Shelf 80-301411................................................................................... 1254.13.1. 800MHz Amplifier Shelf 80-301411 System Diagram................................................. 1264.13.2. 800MHz Amplifier Shelf 80-301411 Outline Drawing.................................................. 1274.13.3. 800MHz Amplifier Shelf 80-301411 Specification ....................................................... 1284.13.4. 800MHz Amplifier Shelf 80-301411 Illustrations ......................................................... 1284.13.4.1. Front View .............................................................................................................. 1284.13.4.2. Rear View............................................................................................................... 1294.13.5. 800MHz Amplifier Shelf 80-301411 Major Sub Components...................................... 1294.13.5.1. Bandpass Filter (02-011601).................................................................................. 1304.13.5.2. Splitter/Combiner (05-002602)............................................................................... 1304.13.5.3. 30dB Directional Coupler (07-002907)................................................................... 1314.13.5.4. Switched Attenuator 0.25Watt, 0 - 30dB (10-000701) ........................................... 1314.13.5.5. Low Noise Amplifier (11-005902)........................................................................... 1324.13.5.6. 5W Power Amplifier (12-018601) ........................................................................... 1334.13.5.7. 20W Power Amplifier (12-020501) ......................................................................... 1344.13.5.8. Automatic Gain Control .......................................................................................... 1354.13.5.9. 24V Relay Dual Assembly (20-001602) ................................................................. 1364.13.5.10. Dual Diode Assembly (94-100004) ...................................................................... 1364.13.5.11. DC/DC Converter, 24V in, 12V 5A out (96-200024) ............................................ 1364.14 PSU 96-300064 ................................................................................................................ 1375. INSTALLATION........................................................................................................................ 1385.1 Installation Record ................................................................................................................ 1385.2 General Remarks.................................................................................................................. 1385.3 Electrical Connections .......................................................................................................... 1385.4 RF Connections .................................................................................................................... 1385.5 Optical Connections.............................................................................................................. 1385.6 Commissioning ..................................................................................................................... 1396. MAINTENANCE ....................................................................................................................... 1406.1 Fault Finding ......................................................................................................................... 1406.1.1 Quick Fault Checklist...................................................................................................... 1406.1.2 Fault Isolation ................................................................................................................. 1406.1.3 Downlink......................................................................................................................... 1406.1.4 Uplink ............................................................................................................................. 1416.1.5 Checking service ............................................................................................................ 1416.1.6 Fault repair ..................................................................................................................... 1416.1.7 Service Support.............................................................................................................. 1416.2 Tools & Test Equipment........................................................................................................ 1426.3 Care of Modules.................................................................................................................... 1426.3.1 General Comments ........................................................................................................ 1426.3.2 Module Removal (LNAs, general procedure) ................................................................. 1426.3.3 Module Replacement (general) ...................................................................................... 1426.3.4 Power Amplifiers ............................................................................................................ 1426.3.5 Low Power Amplifier Replacement ................................................................................ 143
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 6 of 148 6.3.6 Module Transportation ................................................................................................... 143APPENDIX A ..................................................................................................................................... 144A.1. Glossary of Terms used in this document ......................................................................... 144A.2. Key to Drawing Symbols used in this document................................................................ 145A.3. EC Declaration of Conformity ............................................................................................ 146A.4. Amendment List Record Sheet.......................................................................................... 147APPENDIX B ..................................................................................................................................... 148B.1. INITIAL EQUIPMENT SET-UP CALCULATIONS ............................................................. 148
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 7 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 L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 8 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: 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 50, and that of free space at 377, which would severely mitigate against the efficient radiation of RF power. Radio frequency burns could also be a hazard, if any RF power carrying components were to be carelessly touched! Antenna positions should be chosen to comply with requirements (both local & statutory) regarding exposure of personnel to RF radiation. When connected to an antenna, the unit is capable of producing RF field strengths, which may exceed guideline safe values especially if used with antennas having appreciable gain. In this regard the use of directional antennas with backscreens and a strict site rule that personnel must remain behind the screen while the RF power is on, is strongly recommended. Where the equipment is used near power lines or in association with temporary masts not having lightning protection, the use of a safety earth connected to the case-earthing bolt is strongly advised. 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.a) Original assembly. b) Commissioning.. c) Regular intervals, thereafter.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 9 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 L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 10 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. DownlinkThe 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. UplinkThe 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 80-301404The 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 80-301402 where they are combined into a single path and fed into the leaky feeder.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 11 of 148 3.1. In-Line BDA Wall Mount 80-301401 Specification ELECTRICAL SPECIFICATIONDownlink 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 Downlink 482.5 to 483.8 MHz UHF Mid 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 FrequencyRange800MHz Uplink 811.0 to 816.0 MHz Passband Ripple ± 1.5dB VHF 5 Watts UHF Low 20 Watts UHF Mid 20 Watts UHF High 20 Watts Downlink Power Amplifier800MHz 40 Watts VHF 5 Watts UHF Low 5 Watts UHF Mid 5 Watts UHF High 5 Watts Uplink Power Amplifier800MHz 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 SpecificationMechanical IP65 Wall Mount Dimensions(excludes handles and connectors)Qty. 4 off,620mm x 620mm x 250mm(24” x 24” x 10” approx)RF Connectors N-Type Female Alarm InterfacesLocal Alarms to SCADADry Contact with LED Indication per band path
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 12 of 148 3.1.1. In-Line BDA Wall Mount 80-301401 Overall system Diagram Drawing Number 80-301481
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 13 of 148 3.2. In-Line BDA Wall Mount 80-301401 List of Major Components Section Component PartComponent Part Description Qty Per Assembly3.3. 80-301402 Combiner 1 3.4. 80-301403 VHF/UHF BDA Unit 1 3.5. 80-301404 UHF BDA Unit 1 3.6. 80-301405 800MHz BDA Unit 1 3.3. Combiner 80-301402 Splitter/Combiner 80-301402 is the main Splitter/Combiner unit. Signals are received from the leaky feeder and are then split into their various separate paths before being amplified by external band specific amplifiers and then the signals are re-combined for onward transmission via the leaky feeder The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx) Downlink signals are received at the port labelled “DOWNLINK INPUT” (Annotated AA in the picture in section 3.3.4.2.) and there is a 30dB test port labelled “DOWNLINK INPUT TEST PORT” (Z in section 3.3.4.2.). Ports labelled 1 to 5 (P to T in section 3.3.4.2.) are the Downlink outputs to the amplification stages and ports labelled A to E (A to E in section 3.3.4.2.) are the Downlink inputs from the amplification stages. These outputs and inputs are further described below. The Downlink signal leaves the Splitter/Combiner for the leaky feeder via the port labelled “DOWNLINK OUTPUT” (L in section 3.3.4.2.) and there is a 30dB test port labelled “DOWNLINK OUTPUT TEST PORT” (K in section 3.3.4.2.). Uplink signals are received at the port labelled “UPLINK INPUT” (N in section 3.3.4.2.) and there is a 30dB test port labelled “UPLINK INPUT TEST PORT” (M in section 3.3.4.2.). Ports labelled F to J (F to J in section 3.3.4.2.) are the Uplink outputs to the amplification stages and ports labelled 6 to 10 (U to Y in section 3.3.4.2.) are the Uplink inputs from the amplification stages. These outputs and inputs are further described below. The Uplink signal leaves the Splitter/Combiner for the leaky feeder via the port labelled “UPLINK OUTPUT” (CC in section 3.3.4.2.) and there is a 30dB test port labelled “UPLINK OUTPUT TEST PORT” (BB in section 3.3.4.2.). Splitter/Combiner 80-301402 also incorporates bandpass filtering for the three UHF bands, the filters are placed in the RF path before the outputs to and after the inputs from the external amplification stages
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 14 of 148 3.3.1. Combiner 80-301402 System Diagram Drawing Number 80-301482
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 15 of 148 3.3.2. Combiner 80-301402 Outline Drawing Drawing Number 80-301492
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 16 of 148 3.3.3. Combiner 80-301402 Specification DownlinkPARAMETER SPECIFICATIONInsertion Loss from Downlink Input port to port indicatedVHF 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 UplinkPARAMETER SPECIFICATIONInsertion Loss from from Uplink Input port to port indicatedVHF Band to port F < 1.0dB at 155.7 – 160.8MHz UHF Low Band to port G < 3.5dB at 465.4 – 465.5MHz UHF Mid Band to port H < 3.5dB at 485.7 -486.8MHz UHF High Band to port I < 4.0dB at 510.0 – 510.3MHz 800MHz Band to port J < 1.0dB at 811.0 – 816.0MHz Insertion Loss from port indicated to Uplink Input test port VHF Band 31dB at 155.7 – 160.8MHz UHF Low Band 33dB at 465.4 – 465.5MHz UHF Mid Band 33dB at 485.7 – 486.8MHz UHF High Band 33dB at 510.0 – 510.3MHz 800MHz Band 31dB at 811.0 – 816.0MHz Insertion Loss from port indicated to Uplink Output VHF Band from port 6 < 1.0dB at 155.7 – 160.8MHz UHF Low Band from port 7 < 3.5dB at 465.4 – 465.5MHz UHF Mid Band from port 8 < 3.5dB at 485.7 -486.8MHz UHF High Band from port 9 < 4.0dB at 510.0 – 510.3MHz 800MHz Band from port 10 < 1.0dB at 811.0 – 816.0MHz Insertion Loss from port indicated to Uplink Output Test port VHF Band from port 6 31dB at 155.7 – 160.8MHz UHF Low Band from port 7 33dB at 465.4 – 465.5MHz UHF Mid Band from port 8 33dB at 485.7 – 486.8MHz UHF High Band from port 9 33dB at 510.0 – 510.3MHz 800MHz Band from port 10 31dB at 811.0 – 816.0MHz
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 17 of 148 Environmental/Mechanical SpecificationPARAMETER SPECIFICATIONMechanical IP65 Wall Mount RF connectors N type female Dimensions(excludes handles and connectors620mm x 620mm x 250mm (24” x 24” x 10” approx) 3.3.4. Combiner 80-301402 Photographs 3.3.4.1. Front View Note: All connectors are on the underside A Lockable Door Handles
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 18 of 148 3.3.4.2. Underside view showing RF connectors A Port A. Downlink VHF Input from VHF/UHF BDA Unit 80-301403 B Port B. Downlink UHF Lowband Input from VHF/UHF BDA Unit 80-301403 C Port C. Downlink UHF Midband Input from UHF BDA Unit 80-301404 D Port D. Downlink UHF Highband Input from UHF BDA Unit 80-301404 E Port E. Downlink 800MHz Input from 800MHz BDA Unit 80-301405 F Port F. Uplink VHF Output to VHF/UHF BDA Unit 80-301403 G Port G. Uplink UHF Lowband Output to VHF/UHF BDA Unit 80-301403 H Port H. Uplink UHF Midband Output to UHF BDA Unit 80-301404 I Port I. Uplink UHF Highband Output to UHF BDA Unit 80-301404 J Port J. Uplink 800MHz Output to 800MHz BDA Unit 80-301405 K Downlink Output Test Port (30dB Tap) L Downlink Output to Radiating Cable M Uplink Input Test Port (30dB Tap) N Uplink Input from Radiating Cable O Earth Connection P Port 1. Downlink VHF Output to VHF/UHF BDA Unit 80-301403 Q Port 2. Downlink UHF Lowband Output to VHF/UHF BDA Unit 80-301403 R Port 3. Downlink UHF Midband Output to UHF BDA Unit 80-301404 S Port 4. Downlink UHF Highband Output to UHF BDA Unit 80-301404 T Port 5. Downlink 800MHz Output to 800MHz BDA Unit 80-301405 U Port 6. Uplink VHF Input from VHF/UHF BDA Unit 80-301403 V Port 7. Uplink UHF Lowband Input from VHF/UHF BDA Unit 80-301403 W Port 8. Uplink UHF Midband Input from UHF BDA Unit 80-301404 X Port 9. Uplink UHF Highband Input from UHF BDA Unit 80-301404 Y Port 10. Uplink 800MHz Input from 800MHz BDA Unit 80-301405 Z Downlink Input Test Port (30dB Tap) AA Downlink Input from Radiating Cable BB Uplink Output Test Port (30dB Tap) CC Uplink Output to Radiating Cable DD Case feet
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 19 of 148 3.3.4.3. Interior view A Downlink Input 30dB Bi-Directional Coupler 07-022005 B Downlink Input Crossband Splitter/Coupler 07-004815 C Downlink Input Crossband Splitter/Coupler 07-005754 D Downlink Input UHF Lowband Bandpass Filter 02-010701 E Downlink Input UHF Midband Bandpass Filter 02-010701 F Downlink Input UHF Highband Bandpass Filter 02-010901 G Downlink Output UHF Lowband Bandpass Filter 02-010701 H Downlink Output UHF Midband Bandpass Filter 02-010701 I Downlink Output UHF Highband Bandpass Filter 02-010901 J Downlink Output Crossband Splitter/Coupler 07-005754 K Downlink Output Crossband Splitter/Coupler 07-004815 L Downlink Output 30dB Coupler 07-018005 M Uplink Input 30dB Bi-Directional Coupler 07-022005 N Uplink Input Crossband Splitter/Coupler 07-004815 O Uplink Input Crossband Splitter/Coupler 07-005754 P Uplink Input UHF Lowband Bandpass Filter 02-010701 Q Uplink Input UHF Midband Bandpass Filter 02-010701 R Uplink Input UHF Highband Bandpass Filter 02-010901 S Uplink Output UHF Lowband Bandpass Filter 02-010701 T Uplink Output UHF Midband Bandpass Filter 02-01070 U Uplink Output UHF Highband Bandpass Filter 02-010901 V Uplink Output Crossband Splitter/Coupler 07-005754 W Uplink Output Crossband Splitter/Coupler 07-004815 X Uplink Output 30dB Bi-Directional Coupler 07-022005
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 20 of 148 3.3.5. Combiner 80-301402 Major Sub-Components Section Component PartComponent Part Description Qty Per Assembly3.3.5.1. 02-010701 Bandpass Filter 8 3.3.5.2. 02-010901 Bandpass Filter 4 3.3.5.3. 07-004815 Crossband Splitter/Coupler 550/800MHz 4 3.3.5.4. 07-005754 Crossband Splitter/Coupler VHF/UHF 4 3.3.5.5. 07-018005 30dB Directional Coupler 1 3.3.5.6. 07-022005 30dB Bi-Directional Coupler 3 3.3.5.1. Bandpass Filter 02-010701 The bandpass filters are multi-section designs with a bandwidth dependent upon the passband frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with a passband design ripple of 0.1dB. The filters are of combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit. The tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR figure and 50 load at the input and output ports. Being passive devices, the bandpass filters should have an extremely long operational life and require no maintenance. Should a filter be suspect, it is usually most time efficient to replace the module rather than attempt repair or re-tuning. 02-010701 Specification PARAMETER SPECIFICATIONDownlink 460.4 to 460.5 MHz UHF Low Uplink 465.4 to 465.5 MHz Downlink 482.5 to 483.8 MHz PassbandFrequency UHF Mid Uplink 485.7 to 486.8 MHz UHF Low 0.1 MHz Bandwidth UHF Mid 1.3 MHz Number of sections 5 Insertion loss 2.4 dB (typical) VSWR better than 1.2:1 Connectors SMA Power Handling 100W max operation -20°C to +60°C Temperaturerange storage -40°C to +70°C Weight 3 kg (typical) 3.3.5.2. Bandpass Filter 02-010901 Bandpass Filter 02-010901 is a multi-section design with a bandwidth dependent upon the passband frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with a passband design ripple of 0.1dB. The filters are of helical & combline design respectively, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit. The body and tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR figure and 50 load at the input and output ports. Being passive devices, the bandpass filters should have an extremely long operational life and require no maintenance.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 21 of 148 02-010901 specification SPECIFICATION PARAMETERDownlink 507.0 to 507.3MHz PassbandFrequency Uplink 510.0 to 510.3MHz Uplink 0.3 MHz Bandwidth Downlink 0.3 MHz Insertion Loss 2.9 dB (typical) Power Rating 50W Impedance 50ȍVSWR Better than 1.2:1 Connectors SMA Weight 3Kg (approximately) 3.3.5.3. Crossband Splitter/Coupler 550/800MHz (07-004815) The purpose of Crossband Splitter/Coupler (07-004815) is to split or combine RF signals from different parts of the frequency spectrum. It is a 3 port device comprising two filters, one a low pass, the other a high pass, connected to a common input/output. The couplers are housed in a machined aluminium casing having a centre screening wall between the filter sections and lid secured by screws at frequent intervals over its perimeter to obtain a tight seal and to ensure linearity and stability of response. 07-004815 Specification Parameter Low Pass Port High Pass Port Passband Frequencies 380 to 550MHz 800 to 960MHz Insertion loss <0.5dB <0.5dB Isolation between Bands >50dB >50dB VSWR 1.3:1 Impedance 50 ohm Power rating 50W operation -20C to +60CTemperaturerange storage -40C to +70CRF Connectors SMA (female) Weight <1kg 3.3.5.4. Crossband Splitter/Coupler VHF/UHF (07-005754) The purpose of Crossband Splitter/Coupler (07-005754) is to split or combine RF signals from different parts of the frequency spectrum. It is a 3 port device comprising two filters, one a low pass, the other a high pass, connected to a common input/output. The couplers are housed in a machined aluminium casing having a centre screening wall between the filter sections and lid secured by screws at frequent intervals over its perimeter to obtain a tight seal and to ensure linearity and stability of response.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 22 of 148 07-005754 Specification Parameter Low Pass Port High Pass Port Passband Frequencies 70 to 175 MHz 380 to 500 MHz Insertion loss <0.5dB <0.5dB Return loss >14dB typical >14dB typical Isolation between Bands >60dB >60dB Impedance 50 ohm Power rating 50W operation -20C to +60CTemperaturerange storage -40C to +70CRF Connectors SMA (female) Weight <1kg 3.3.5.5. 30dB Directional Coupler (07-018005) The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from transmission lines and to combine them, for example though splitter units for different purposes (alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the specified frequency range. 07-018005 is a Uni-Directional device and as such will only couple 30dB of signal in one direction. 07-018005 Specification PARAMETER SPECIFICATIONFrequency Range 70 MHz - 1000MHzMainline Insertion Loss <0.5 Coupling Loss 30 dB VSWR Mainline Better than 1.3:1 Impedance 50 ȍPower 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 -20C to +60CTemperaturerange storage -40C to +70CIngress Protection IP54
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 23 of 148 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 SPECIFICATIONFrequency Range 100kHz – 2.7GHzMainline Insertion Loss < 1.0 dB Coupling Loss 30 dB Coupling Loss Tolerance +/-2.0 dB VSWR Mainline Better than 1.4:1 Impedance 50 ȍPower Handling (CW) 5W Outline (W x D x H) 44.5mm x 41mm x 27mm (ex. connectors) Connectors SMA (female) on all ports Case Material Aluminium Finish Iridite NCP Operating Temperature -20 to +55°C Ingress Protection IP54
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 24 of 148 3.4. VHF/UHF BDA Unit (80-301403) VHF/UHF BDA Unit (80-301403) provides the amplification stages for the VHF and UHF Lowband paths, The unit is housed in a wall mount case 600x600x250mm (24” x 24” x 10” approx). The Downlink VHF signal is received at the port labelled “VHF D/L INPUT” (Annotated A in the picture in section 3.4.4.2.). The Downlink VHF path passes through a bandpass filter to remove out of band noise and then a switched attenuator providing 0 to 30 dB of RF signal attenuation.After leaving the attenuator the VHF Downlink signal passes through a 5W amplification stage, this amplification stage is straddled by an Automatic Gain Control assembly providing limiting to the output signals in the case of high input signals.After leaving the Amplification/AGC stage the VHF Downlink signal passes through a second bandpass filter and exits the BDA via the port labelled “VHF D/L OUTPUT” ( B in section 3.4.4.2.). The Uplink VHF Signal is received at the port labelled “VHF U/L INPUT” (C in section 3.4.4.2.). The VHF Uplink path passes through a bandpass filter to remove out of band noise and then a switched attenuator providing 0 to 30 dB of RF signal attenuation.After leaving the attenuator the VHF Uplink signal passes through a 5W amplification stage, this amplification stage is straddled by an Automatic Gain Control assembly providing limiting to the output signals in the case of high input signals.After leaving the Amplification/AGC stage the VHF Uplink signal passes through a second bandpass filter and exits the BDA via the port labelled “VHF U/L OUTPUT” (D in section 3.4.4.2.). The Downlink UHF Lowband signal is received at the port labelled “UHF LOW D/L INPUT” (E in section 3.4.4.2.). The signal passes through a switched attenuator providing 0 to 30 dB of RF signal attenuation and then into the amplification stage. The Downlink UHF Lowband amplification stage is provided by tow amplifier modules, the first is a 15dB gain Low Power Amplifier and the second is a 20W, 23dB gain power amplifier. Both amplification stages are straddled by an Automatic Gain Control assembly providing limiting to the output signals in the case of high input signals.The input to the AGC detector is provided by the output of a 30dB tap. After leaving the Amplification/AGC stage the Downlink UHF Lowband signal exits the BDA via the port labelled “UHF LOW D/L OUTPUT” (F in section 3.4.4.2.). The Uplink UHF Lowband signal is received at the port labelled “UHF LOW U/L INPUT” (G in section 3.4.4.2.). The signal passes into a Low Noise Amplifier providing 15dB of gain and then into a switched attenuator providing 0 to 30 dB of RF signal attenuation. After the attenuator the Uplink UHF Lowband signal passes into a second stage of amplification provided by a 5W, 30dB gain Power Amplifier, this amplification stage is straddled by an Automatic Gain Control assembly providing limiting to the output signals in the case of high input signals.The Uplink UHF Lowband signal exits the BDA via the port labelled “UHF LOW U/L OUTPUT” (H in section 3.4.4.2.). VHF/UHF BDA Unit (80-301403) is provided with a 24V DC input to power the amplifier modules within and those amplifier modules are configured to provide alarm status reports. Separate alarm contact outputs are provided for the VHF and the UHF Lowband paths.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 25 of 148 3.4.1. VHF/UHF BDA Unit (80-301403) System Diagram Drawing Number 80-301483
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 26 of 148 3.4.2. VHF/UHF BDA Unit (80-301403) Outline Drawing Drawing Number 80-301493
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 27 of 148 3.4.3. VHF/UHF BDA Unit(80-301403) Specification Parameter SpecificationDownlinkVHF 154.0 to 161.5MHz Downlink Passband UHF Lowband 460.4 to 460.5MHz VHF 30dB Maximun gain UHF Lowband 30dB VHF 0 to 30dB in 2dB steps Gain Adjustment UHF Lowband 0 to 30dB in 2dB steps VHF > +34.0dBm 1dB Compression Point (P1dB) UHF Lowband > +42.5dBm VHF 1dB below P1dB ALC setting UHF Lowband 1dB below P1dB VHF > +45.0dBm 3rd Order Intercept point UHF Lowband > +53.5dBm UplinkVHF 155.5 – 161.0MHz Uplink Passband UHF Lowband 465.4 – 465.5MHz VHF 30dB Maximun gain UHF Lowband 30dB VHF 0 to 30dB in 2dB steps Gain Adjustment UHF Lowband 0 to 30dB in 2dB steps VHF > +34.0dBm 1dB Compression Point (P1dB) UHF Lowband > +36.5dBm VHF +27dBm ALC setting UHF Lowband +27dBm VHF > +45.0dBm 3rd Order Intercept point UHF Lowband > +48.0dBm VHF < 10dB Noise Figure UHF Lowband < 3.0dB Environmental/Mechanical SpecificationMechanical IP65 Wall Mount Dimensions(excludes handles and connectors)620mm x 620mm x 250mm (24” x 24” x 10” approx) RF Connectors N-Type Female Alarm InterfacesLocal Alarms to SCADADry Contact with LED Indication per band pathPower Supply 24V DC
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 28 of 148 3.4.4. VHF/UHF BDA Unit(80-301403) Photographs 3.4.4.1. Front View Note: All connectors (RF, DC and Alarms) are on the underside A Green LED “Power On” B Red LED VHF Downlink Alarm C Red LED VHF Uplink Alarm D Red LED UHF Lowband Downlink Alarm E Red LED UHF Lowband Uplink Alarm F Lockable Door Handles
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 29 of 148 3.4.4.2. Underside view showing connectors A VHF Downlink Input from port 1 on Combiner 80-301402 B VHF Downlink Output to port A on Combiner 80-301402 C VHF Uplink Input from port F on Combiner 80-301402 D VHF Uplink Output to port 6 on Combiner 80-301402 E UHF Lowband Downlink Input from port 2 on Combiner 80-301402 F UHF Lowband Downlink Output to port B on Combiner 80-301402 G UHF Lowband Uplink Input from port G on Combiner 80-301402 H UHF Lowband Uplink Output to port 7 on Combiner 80-301402 I 24V DC Input J VHF Band Alarm Output K UHF Lowband Alarm Output L Earth Connection
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 30 of 148 3.4.4.3. Interior view A VHF Downlink Filters 01-002503 (Input filter below, Output filter above) B VHF Downlink Switched Attenuator 10-000701 C VHF Downlink AGC Attenuator 17-001201 D VHF Downlink 5W Power Amplifier 12-025602 E VHF Downlink AGC Detector 17-001101 F VHF Uplink Filters 01-002503 (Input filter below, Output filter above) G VHF Uplink Switched Attenuator 10-000701 H VHF Uplink AGC Attenuator 17-001201 I VHF Uplink 5W Power Amplifier 12-025602 J VHF Uplink AGC Detector 17-001101 K UHF Lowband Downlink Switched Attenuator 10-000701 L UHF Lowband Downlink AGC Attenuator 17-001201 M UHF Lowband Downlink Low Power Amplifier 12-021801 N UHF Lowband Downlink 20W Power Amplifier 12-016301 O UHF Lowband Downlink 30dB Directional Coupler 07-002908 P UHF Lowband Downlink AGC Detector 17-001105 Q UHF Lowband Uplink Low Noise Amplifier 11-005401 R UHF Lowband Uplink Switched Attenuator 10-000701 S UHF Lowband Uplink AGC Attenuator 17-001201 T UHF Lowband Uplink 5W Power Amplifier 12-021601 U UHF Lowband Uplink AGC Detector 17-001101 V DC/DC Converter 96-200024 W 24V Dual Relay Assembly (VHF Alarm output) 20-001602 X 24V Dual Relay Assembly (UHF Lowband output) 20-001602 Y 24V Relay Assembly 80-008902 Z Dual Diode Assembly 94-100004 AA Main DC 10A Circuit Breaker 96-920021
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 31 of 148 3.4.5. VHF/UHF BDA Unit(80-301403) Major Sub-components Section Component PartComponent Part Description Qty Per Assembly3.4.5.1. 01-002503 Bandpass Filter 4 3.4.5.2. 07-002908 30dB Directional Coupler 1 3.4.5.3. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 4 3.4.5.4. 11-005401 Low Noise Amplifier 1 3.4.5.5. 12-016301 TETRA Power Amplifier 20W 1 3.4.5.6. 12-021601 TETRA Power Amplifier 5W 1 3.4.5.7. 12-021801 Low Power Amplifier 1 3.4.5.8. 12-025602 VHF Power Amplifier 5W 2 17-001101 AGC Detector Assembly 3 17-001105 AGC Detector Assembly (Logarithmic) 1 3.4.5.9.17-001201 AGC Attenuator Assembly 4 3.4.5.10. 20-001602 24V Dual Relay Assembly 2 3.4.5.11. 80-008902 24V Relay Assembly 1 3.4.5.12. 94-100004 Dual Diode Assembly 1 3.4.5.13. 96-200024 DC/DC Converter 1 3.4.5.1. 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 PARAMETERDownlink 154.0 MHz to 161.5 MHz BandpassFrequency Uplink 155.5 MHz to 161.0 MHz Downlink 7.5MHz Bandwidth Uplink 5.5MHz No. of sections 6 Insertion loss 1.5dB VSWR Better than 1.2:1 Connectors SMA Power handling 100W maximum operational -20°C to +60°C Temperaturerange store -40°C to +70°C Weight 3 kg Size 384 x 82.5 x 56.4mm
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 32 of 148 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 SPECIFICATIONFrequency range 50 - 1000MHz Insertion loss <0.3dB Coupling level 30dB Rejection N/A Weight <200gms Connectors N type, female operation -20°C to +60°C Temperaturerange storage -40°C to +70°C 3.4.5.3. 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 SPECIFICATIONAttenuation Values 0-30dB Attenuation Steps 2, 4, 8 and 16dB Power Handling 0.25 Watt Attenuation Accuracy ± 1.0 dB Frequency Range DC to 1GHz Impedance 50ȍConnectors SMA VSWR 1.3:1 Weight 0.2kg operation -20°C to +60°C Temperaturerange storage -40°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 33 of 148 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 SPECIFICATIONFrequency range 380 - 500MHz Bandwidth <100MHz (as required, tuneable) 1dB compression point >+20dBm 3rd order intercept >+33dBm Gain >15.5dB (typical) VSWR better than 1.5:1 Input return loss >14dB Noise figure <2.0dB (typical) Connectors SMA female Supply 115mA at 12V DC operational -10°C to +60°C Temperaturerange storage -40°C to +70°C Size 88 x 50 x 34mm (ex. connectors) Weight 0.26kg LNA ‘D’ Connector Pin-out details Connector pin Signal1 +ve input (10-24V) 2 GND 3 Alarm relay O/P bad 4 Alarm relay common 5 Alarm relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad 9-Way Pin-Out Graphical Representation
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 34 of 148 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 SPECIFICATIONFrequency range 380-470MHz Small signal gain 23dB Gain flatness ±1.7dB I/O Return loss >18dB 1dB compression point +43dBm OIP3 +55dBm Supply voltage 24V DC Supply current 3.8Amps (Typical) operational -10°C to +60°C Temperaturerange storage -20°C to +70°C Weight <2kg (no heatsink) 7-Way Connector Pin-out details Connector Pin SignalA1 (large pin) +24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 35 of 148 A1 A21 23 4 53.4.5.6. 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 semi-conductor 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 SPECIFICATIONFrequency range: 380-470MHz (as required) Bandwidth: 10-40MHz (typical, tuned to spec.) Maximum RF output: >5Watts Gain: >30dB 1dB compression point: +37.5dBm 3rd order intercept point: +50dBm VSWR: better than 1.5:1 Connectors: SMA female Supply: 1.9Amps @ 12V DC Weight: 1kg (excluding heatsink) operational: -10qC to +60qCTemperaturerange: storage: -20qC to +70qC7-Way Connector Pin-out details Connector Pin SignalA1 (large pin) +12V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL) 7-Way Pin-Out Graphical Representation
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 36 of 148 7 8 961 2 3 4 59-Way Pin-Out Graphical Representation3.4.5.7. 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 SPECIFICATIONTemperature -20 to +70 qCFrequency Range 380 - 500 MHz Small Signal Gain 15.5 +/- 0.5 dB Gain Flatness 0.7 dB p-p 'Gain vs. Temperature 0.7 dBIn RL 20 dB Out RL 20 dB Output Power @ 1dB Compression Point +30.5 dBm Output 3rd Order IP +41.5 dBm Noise Figure 6 dB DC Supply Voltage 10-15 Vdc DC Supply Current 540 mA operational: -10qC to +60qCTemperaturerange storage: -40qC to +100qCWeight: <0.5 kg Size: 110.5 x 66mm x 24.6mm Low Power Amplifier (12-021801) 9-Way Connector Pin-outs Connector pin Signal1 +ve input (10-15V) 2 GND 3 Alarm relay O/P bad 4 Alarm relay common 5 Alarm relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 37 of 148 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 semi-conductor 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 SPECIFICATIONFrequency range 108 to 174 MHz (as required) Maximum RF output >5Watts Gain t 34 dB 1dB compression point t +37 dBm 3rd order intercept point t +48 dBm In / RL 16 dB Out / RL 15 dB Noise Figure  9.5 dB Connectors SMA female Supply 24 +/- 0.5 Vdc @ 1040 mA Max operational -10qC to +60qCTemperaturerange storage -20qC to +70qC7-Way Connector Pin-out details Connector Pin SignalA1 (large pin) +24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 38 of 148 3.4.5.9. Automatic Gain Control 17-001101 AGC Detector Assembly 17-001105 AGC Detector Assembly (Logarithmic) 17-001201 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 39 of 148 20-001602 Specification PARAMETER SPECIFICATIONOperating 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 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals operational -10°C to +60°C Temperaturerange 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 SpecificationMax. switch current 1.0Amp Max. switch volts 120Vdc/60VA Max. switch power 24W/60VA Min. switch load 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details 15-way 0.1" pitch operational -10°C to +55°C Temperaturerange storage -40°C to +70°C 3.4.5.12. 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 40 of 148 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 SPECIFICATIONInput Voltage range 18-28V DC Output voltage 12V±0.5V Max output current load 5.0 Amps operation -10°C to +60°C Temperaturerange storage -20°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 41 of 148 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 42 of 148 3.5.1. UHF BDA Unit (80-301404) System Diagram Drawing Number 80-301484
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 43 of 148 3.5.2. UHF BDA Unit (80-301404) Outline Drawing Drawing Number 80-301494
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 44 of 148 3.5.3. UHF BDA Unit (80-301404) SpecificationParameter SpecificationDownlinkUHF Midband 482.5 to 483.8MHz Downlink Passband UHF Highband 507.0 to 507.3MHz UHF Midband 30dB Maximun gain UHF Highband 30dB UHF Midband 0 to 30dB in 2dB steps Gain Adjustment UHF Highband 0 to 30dB in 2dB steps UHF Midband > +42.5dBm 1dB Compression Point (P1dB) UHF Highband > +42.5dBm UHF Midband 1dB below P1dB ALC setting UHF Highband 1dB below P1dB UHF Midband > +53.5dBm 3rd Order Intercept point UHF Highband > +53.5dBm UplinkUHF Midband 485.7 to 486.8MHzUplink Passband UHF Highband 510.0 to 510.3MHz UHF Midband 30dB Maximun gain UHF Highband 30dB UHF Midband 0 to 30dB in 2dB steps Gain Adjustment UHF Highband 0 to 30dB in 2dB steps UHF Midband > +36.5dBm 1dB Compression Point (P1dB) UHF Highband > +36.5dBm UHF Midband +27dBm ALC setting UHF Highband +27dBm UHF Midband > +48.0dBm 3rd Order Intercept point UHF Highband > +48.0dBm UHF Midband < 3.0dB Noise Figure UHF Highband < 3.0dB Environmental/Mechanical SpecificationMechanical IP65 Wall Mount Dimensions(excludes handles and connectors)620mm x 620mm x 250mm (24” x 24” x 10” approx) RF Connectors N-Type Female Alarm InterfacesLocal Alarms to SCADADry Contact with LED Indication per band pathPower Supply 24V DC
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 45 of 148 3.5.4. UHF BDA Unit (80-301404) Photographs 3.5.4.1. Front View Note: All connectors (RF, DC and Alarms) are on the underside A Red LED UHF Highband Downlink Alarm B Red LED UHF Highband Uplink Alarm C Red LED UHF Midband Downlink Alarm D Red LED UHF Midband Uplink Alarm E Green LED “Power On” F Lockable Door Handles
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 46 of 148 3.5.4.2. Underside view showing connectors A UHF Midband Downlink Input from port 3 on Combiner 80-301402 B UHF Midband Downlink Output to port C on Combiner 80-301402 C UHF Midband Uplink Output to port 8 on Combiner 80-301402 D UHF Midband Uplink Input from port H on Combiner 80-301402 E UHF Highband Uplink Input from port I on Combiner 80-301402 F UHF Highband Uplink Output to port 9 on Combiner 80-301402 G UHF Highband Downlink Input from port 4 on Combiner 80-301402 H UHF Highband Downlink Output to port D on Combiner 80-301402 I 24V DC Input J UHF Midband Band Alarm Output K UHF Highband Alarm Output L Earth Connection
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 47 of 148 3.5.4.3. Interior view A UHF Midband Downlink Switched Attenuator 10-000701 B UHF Midband Downlink AGC Attenuator 17-001201 C UHF Midband Downlink Low Power Amplifier 12-021801 D UHF Midband Downlink 20W Power Amplifier 12-016301 E UHF Midband Downlink 30dB Directional Coupler 07-002908 F UHF Midband Downlink AGC Detector Assembly 17-001105 G UHF Midband Uplink Low Noise Amplifier 11-005401 H UHF Midband Uplink Switched Attenuator 10-000701 I UHF Midband Uplink AGC Attenuator 17-001201J UHF Midband Uplink 5W Power Amplifier 12-021601 K UHF Midband Uplink AGC Detector Assembly 17-001101 L UHF Highband Downlink Switched Attenuator 10-000701 M UHF Highband Downlink AGC Attenuator 17-001201 N UHF Highband Downlink Low Power Amplifier 12-021801 O UHF Highband Downlink 20W Power Amplifier 12-016301 P UHF Highband Downlink 30dB Directional Coupler 07-002908 Q UHF Highband Downlink AGC Detector Assembly 17-001105 R UHF Highband Uplink Low Noise Amplifier 11-005401 S UHF Highband Uplink Switched Attenuator 10-000701 T UHF Highband Uplink AGC Attenuator 17-001201 U UHF Highband Uplink 5W Power Amplifier 12-021601 V UHF Highband Uplink AGC Detector Assembly 17-001101 W DC/DC Converter 13-003011 X 24V Dual Relay Assembly 20-001602 UHF Highband Alarms Y 24V Dual Relay Assembly 20-001602 UHF Midband AlarmsZ 24V Relay Assembly 80-008909 UHF Midband Alarms AA 24V Relay Assembly 80-008909 UHF Highband Alarms BB Dual Diode Assembly 94-100004 CC DC Circuit Breaker
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 48 of 148 3.5.5. UHF BDA Unit (80-301404) Major Sub-components Section Component PartComponent Part Description Qty Per Assembly3.5.5.1. 07-002908 30dB Directional Coupler 2 3.5.5.2. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 4 3.5.5.3. 11-005401 Low Noise Amplifier 2 3.5.5.4. 12-016301 TETRA Power Amplifier 20W 2 3.5.5.5. 12-021601 TETRA Power Amplifier 5W 2 3.5.5.6. 12-021801 Low Power Amplifier 2 3.5.5.7. 13-003011 DC/DC Converter 1 17-001101 AGC Detector Assembly 2 17-001105 AGC Detector Assembly (Logarithmic) 2 3.5.5.8.17-001201 AGC Attenuator Assembly 4 3.5.5.9. 20-001602 24V Dual Relay Assembly 2 3.5.5.10. 80-008909 24V Relay Assembly 2 3.5.5.11. 94-100004 Dual Diode Assembly 1 3.5.5.1. 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 SPECIFICATIONFrequency range 50 - 1000MHz Insertion loss <0.3dB Coupling level -30dB Rejection N/A Weight <200g Connectors N type, female operation -20°C to +60°C Temperaturerange storage -40°C to +70°C 3.5.5.2. 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 49 of 148 10-000701 Specification PARAMETER SPECIFICATIONAttenuation Values 0-30dB Attenuation Steps 2, 4, 8 and 16dB Power Handling 0.25 Watt Attenuation Accuracy ± 1.0 dB Frequency Range DC to 1GHz Impedance 50ȍConnectors SMA VSWR 1.3:1 Weight 0.2kg operation -20°C to +60°C Temperaturerange storage -40°C to +70°C 3.5.5.3. 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 SPECIFICATIONFrequency range 380 - 500MHz Bandwidth <100MHz (as required, tuneable) 1dB compression point >+20dBm 3rd order intercept >+33dBm Gain >15.5dB (typical) VSWR better than 1.5:1 Input return loss >14dB Noise figure <2.0dB (typical) Connectors SMA female Supply 115mA at 12V DC operational -10°C to +60°C Temperaturerange storage -40°C to +70°C Size 88 x 50 x 34mm (ex. connectors) Weight 0.26kg LNA ‘D’ Connector Pin-out details Connector pin Signal1 +ve input (10-24V) 2 GND 3 Alarm relay O/P bad 4 Alarm relay common 5 Alarm relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good)9 O/C good/0V bad
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 50 of 148 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 SPECIFICATIONFrequency range 380-470MHz Small signal gain 23dB Gain flatness ±1.7dB I/O Return loss >18dB 1dB compression point +43dBm OIP3 +55dBm Supply voltage 24V DC Supply current 3.8Amps (Typical) operational -10°C to +60°C Temperaturerange storage -20°C to +70°C Weight <2kg (no heatsink) 7-Way Connector Pin-out details Connector Pin SignalA1 (large pin) +24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 51 of 148 A1 A21 23 4 53.5.5.5. 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 semi-conductor 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 SPECIFICATIONFrequency range: 380-470MHz (as required) Bandwidth: 10-40MHz (typical, tuned to spec.) Maximum RF output: >5Watts Gain: >30dB 1dB compression point: +37.5dBm 3rd order intercept point: +50dBm VSWR: better than 1.5:1 Connectors: SMA female Supply: 1.9Amps @ 12V DC Weight: 1kg (excluding heatsink) operational: -10qC to +60qCTemperaturerange: storage: -20qC to +70qC7-Way Connector Pin-out details Connector Pin SignalA1 (large pin) +10-24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL) 7-Way Pin-Out Graphical Representation
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 52 of 148 7 8 961 2 3 4 59-Way Pin-Out Graphical Representation3.5.5.6. 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 SPECIFICATIONTemperature -20 to +70 qCFrequency Range 380 - 500 MHz Small Signal Gain 15.5 +/- 0.5 dB Gain Flatness 0.7 dB p-p 'Gain vs. Temperature 0.7 dBIn RL 20 dB Out RL 20 dB Output Power @ 1dB Compression Point +30.5dBm Output 3rd Order IP +41.5dBm Noise Figure 6 dB DC Supply Voltage 10-15 Vdc DC Supply Current 540 mA Max operational -10qC to +60qCTemperaturerange storage -40qC to +100qCWeight <0.5 kg Size 110.5 x 66mm x 24.6mm Low Power Amplifier (12-021801) 9-Way Connector Pin-outs Connector pin Signal1 +ve input (10-15V) 2 GND 3 Alarm relay O/P bad 4 Alarm relay common 5 Alarm relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good)9 O/C good/0V bad
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 53 of 148 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 SPECIFICATIONInput Voltage range 18-28V DC Output voltage 12V±0.5V Max. current load 8.0Amps operation -10°C to +60°C Temperaturerange storage -20°C to +70°C Size(PCB) 190 x 63mm Weight (Loaded PCB) 291g 3.5.5.8. Automatic Gain Control 17-001101 AGC Detector Assembly 17-001105 AGC Detector Assembly (Logarithmic) 17-001201 AGC Attenuator Assembly 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 54 of 148 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 SPECIFICATIONOperating 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 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals operational -10°C to +60°C Temperaturerange 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 SPECIFICATIONOperating 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 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals operational -10°C to +60°C Temperaturerange storage -20°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 55 of 148 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 56 of 148 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 57 of 148 3.6.1. 800MHz BDA UNIT (80-301405) System Diagram Drawing Number 80-301485
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 58 of 148 3.6.2. 800MHz BDA UNIT (80-301405) Outline Drawing Drawing Number 80-301495
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 59 of 148 3.6.3. 800MHz BDA UNIT (80-301405) SpecificationParameter SpecificationDownlinkDownlink Passband 856.0 to 861.0MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) > +45.0dBm ALC setting 1dB below P1dB 3rd Order Intercept point > +55.0dBm UplinkUplink Passband 811.0 to 816.0MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) > +36.0dBm ALC setting +27dBm 3rd Order Intercept point > +46.0dBm Noise Figure < 5.0 dB Environmental/Mechanical SpecificationMechanical IP65 Wall Mount Dimensions(excludes handles and connectors)620mm x 620mm x 250mm (24” x 24” x 10” approx) RF Connectors N-Type Female Alarm InterfacesLocal Alarms to SCADADry Contact with LED Indication per band pathPower Supply 24V DC
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 60 of 148 3.6.4. 800MHz BDA UNIT (80-301405) Photographs3.6.4.1. Front View Note: All connectors (RF, DC and Alarms) are on the underside A Green LED “Power On” B Red LED Uplink Alarm C Red LED Downlink Alarm D Lockable Door Handles 3.6.4.2. Underside view showing connectors A 800MHz Downlink Input from port 5 on Combiner 80-301402 B 800MHz Downlink output to port E on Combiner 80-301402 C 800MHz Downlink Input from port J on Combiner 80-301402 D 800MHz Downlink output to port 10 on Combiner 80-301402 E Alarm Output F 24V DC Input G Earth Connection
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 61 of 148 3.6.4.3. Interior view A Downlink Input Bandpass Filter 02-011601 B Downlink Switched Attenuator 10-000701 C Downlink Low Noise Amplifier 11-005902 D Downlink AGC Attenuator Assembly17-001201 E Downlink Splitter/Combiner 05-002602 (splits signal to feed Power Amplifiers) F Downlink 20W Power Amplifier 12-020501 (1) G Downlink 20W Power Amplifier 12-020501 (2) H Downlink Splitter/Combiner 05-002602 (combines signals from Power Amplifiers) I Downlink 30dB Directional Coupler 07-002907 J Downlink AGC Detector Assembly17-001105 K Downlink Output Bandpass Filter 02-011601 L Uplink Input Bandpass Filter 02-011601 M Uplink Low Noise Amplifier 11-005902 N Uplink Switched Attenuator 10-000701 O Uplink AGC Attenuator Assembly17-001201 P Uplink 5W Power Amplifier 12-018601 Q Uplink AGC Detector Assembly17-001101 R Uplink Output Bandpass Filter 02-011601 S 24V Relay Dual Assembly 20-001602 T DC/DC Converter 96-200024 U Dual Diode Assembly 94-100004 V Main DC Circuit Breaker
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 62 of 148 3.6.5. 800MHz BDA UNIT (80-301405) Major Sub-components section Component PartComponent Part Description Qty Per Assembly3.6.5.1. 02-011601 Bandpass FIlter 4 3.6.5.2. 05-002602 Splitter/Combiner 2 3.6.5.3. 07-002907 30dB Directional Coupler 1 3.6.5.4. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 2 3.6.5.5. 11-005902 Low Noise Amplifier 2 3.6.5.6. 12-018601 5W Power Amplifier 1 3.6.5.7. 12-020501 20W Power Amplifier 2 17-001101 AGC Detector Assembly 1 17-001105 AGC Detector Assembly (Logarithmic) 1 3.6.5.8.17-001201 AGC Attenuator Assembly 2 3.6.5.9. 20-001602 24V Relay Dual Assembly 1 3.6.5.10. 94-100004 Dual Diode Assembly 1 3.6.5.11. 96-200024 DC/DC Converter, 24V in, 12V 5A out 1 3.6.5.1. 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 SPECIFICATIONDownlink 856 to 861MHz FrequencyRange Uplink 811 to 816MHz Downlink 5 MHz Bandwidth Uplink 5 MHz Number of Sections 8 Insertion Loss 1.2 dB VSWR better than 1.2:1 Connectors SMA Power Handling 100W max operation -10°C to +55°C Temperaturerange storage -40°C to +70°C Weight 3 kg (typical)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 63 of 148 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 SPECIFICATIONFrequency Range 800 – 1000MHz Bandwidth 200MHz Ports 3 Insertion loss 3.3dB typical Return loss input & output 1.3:1 Impedance 50ȍIsolation >20dB MTFB >180,000 hours Splitting 20Watts Power rating Combining 0.5Watt Connectors SMA female Weight 200g (approximately) Size 54 x 44 x 21mm 3.6.5.3. 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 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 SPECIFICATIONFrequency range 800 - 1000MHz Insertion loss <0.3dB Coupling level -30dB ±0.5dB Rejection N/A Weight <200g Connectors SMA, female operation -20°C to +60°C Temperaturerange storage -40°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 64 of 148 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 SPECIFICATIONAttenuation Values 0-30dB Attenuation Steps 2, 4, 8 and 16dB Power Handling 0.25 Watt Attenuation Accuracy ± 1.0 dB Frequency Range DC to 1GHz Impedance 50ȍConnectors SMA VSWR 1.3:1 Weight 0.2kg operation -20°C to +60°C Temperaturerange storage -40°C to +70°C 3.6.5.5. 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 SPECIFICATIONFrequency range 800 – 960MHz Bandwidth <170MHz Gain 19.5dB (typical) 1dB compression point +21dBm OIP3 +33dBm Input/output return loss >20dB Noise figure 1dB (typical) Power consumption 190mA @ 24V DC Supply voltage 10-24V DC Connectors SMA female operational -10°C to +60°C Temperaturerange storage -40°C to +70°C Size 90 x 55 x 30.2mm Weight 0.28kg
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 65 of 148 LNA ‘D’ Connector Pin-out details Connector pin Signal1 +Ve input (10-24V) 2 GND 3 Alarm relay O/P bad 4 Alarm relay common 5 Alarm relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad 3.6.5.6. 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 SPECIFICATIONFrequency range 800-960MHz Small signal gain 30dB Gain flatness ±0.5dB I/O Return loss >20dB 1dB compression point +37dBm OIP3 +52dBm Supply voltage 12V DC Supply current 2.0Amps (typical) operational -10°C to +60°C Temperaturerange storage -20°C to +70°C Weight <2kg (no heatsink) PA 7-Way Connector Pin-outs Connector Pin SignalA1 (large pin) +12V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 66 of 148 A1 A21 23 4 57-Way Connector Graphical Representation3.6.5.7. 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 SPECIFICATIONFrequency range 800-960MHz Small signal gain 31.5dB Gain flatness ±0.6dB I/O Return loss >18dB 1dB compression point +43.5dBm OIP3 +54dBm Supply voltage 24V DC Supply current 4.6Amps @12V(typical) operational -10°C to +60°C Temperaturerange storage -20°C to +70°C Weight <2kg (no heatsink) PA 7-Way Connector Pin-outs Connector Pin SignalA1 (large pin) +24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 67 of 148 3.6.5.8. Automatic Gain Control 17-001101 AGC Detector Assembly 17-001105 AGC Detector Assembly (Logarithmic) 17-001201 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 (17-001105), 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 68 of 148 20-001602 Specification PARAMETER SPECIFICATIONOperating 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 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals operational -10°C to +60°C Temperaturerange 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 SPECIFICATIONInput Voltage range 18-28V DC Output voltage 12V±0.5V Max. current load 5.0 Amps operation -10°C to +60°C Temperaturerange storage -20°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 69 of 148 4. In-Line BDA Rack Mount 80-301406 The Rack Mount In Line BDA consists of ten, 19” equipment rack mount shelvesThe 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: x 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 x 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 x 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 x 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 shelvesThe 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
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 70 of 148 DownlinkThe downlink signal is received from the radiating cable and enters the Downlink 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 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. UplinkThe 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 71 of 148 4.1. In-Line BDA Rack Mount System Diagrams 4.1.1. Overall System Diagram Drawing Number 80-301486
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 72 of 148 4.1.2. Combiners System Diagram Drawing Number 80-301487
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 73 of 148 4.2. In-Line BDA Rack Mount 80-301406 Specification ELECTRICAL SPECIFICATIONDownlink 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 Downlink 482.5 to 483.8 MHz UHF Mid 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 FrequencyRange800MHz Uplink 811.0 to 816.0 MHz Passband Ripple ± 1.5dB VHF 5 Watts UHF Low 20 Watts UHF Mid 20 Watts UHF High 20 Watts Downlink Power Amplifier800MHz 40 Watts VHF 5 Watts UHF Low 5 Watts UHF Mid 5 Watts UHF High 5 Watts Uplink Power Amplifier800MHz 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 Mechanical SpecificationMechanical Two 40U, 19” Swingframe, 600mm x 600mm Equipment Mounting racks RF Connectors N-Type Female Alarm InterfacesLocal Alarms to SCADADry Contact with LED Indication per band path
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 74 of 148 4.3. In-Line BDA Rack Mount 80-301406 Illustrations 4.3.1. Rack 1 Front View A Downlink Input Shelf 80-301407 B Uplink Input Shelf 80-301407 C Uplink Output Shelf 80-301407 D UHF Highband Amplifier Shelf 80-301410 E UHF Midband Amplifier Shelf 80-301410 F UHF Lowband Amplifier Shelf 80-301410 G VHF Amplifier Shelf 80-301409 H PSU Shelf I PSU Modules J 2U Blanking Panel K 1U Blanking panel
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 75 of 148 4.3.2. Rack 1 Rear View A Downlink Input Shelf 80-301407 B Uplink Input Shelf 80-301407 C Uplink Output Shelf 80-301407 D UHF Highband Amplifier Shelf 80-301410 E UHF Midband Amplifier Shelf 80-301410 F UHF Lowband Amplifier Shelf 80-301410 G VHF Amplifier Shelf 80-301409 H PSU Shelf I Rack Interconnections
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 76 of 148 4.3.3. Rack 2 Front View A Downlink Output Shelf 80-301408 B 800MHz Amplifier Shelf 80-301411 C 4U Blanking panel D 1U Blanking panel
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 77 of 148 4.3.4. Rack 2 Rear View Top part of rack only A Downlink Output Shelf 80-301408 B 800MHz Amplifier Shelf 80-301411 C Rack Interconnections
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 78 of 148 4.3.5. Rack 1 Top View A U/L I/P “J” B U/L I/P C D/L I/P D U/L O/P E UHF HIGH D/P O/P F UHF MID D/L O/P G D/L I/P TEST PORT H U/L I/P TEST PORT I D/L I/P “A” J U/L O/P TEST PORT K U/L O/P “C” L UHF LOW D/L O/P M VHF D/L O/P N CABLE GLAND FOR ELECTRICAL WIRING
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 79 of 148 4.3.6. Rack 2 Top View A D/L O/P “D” B D/L O/P “B” C D/L I/P D D/L O/P E U/L I/P F D/L O/P “C” G U/L O/P H D/L O/P TEST PORT I D/L O/P “A” J CABLE GLAND FOR ELECTRICAL WIRING
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 80 of 148 4.4. In-Line BDA Rack Mount 80-301401 List of Major Components Section Component PartComponent Part Description Qty Per Assembly 4.5. 80-301407 Downlink Input Shelf 1 4.6. 80-301408 Downlink Output Shelf 1 4.7. 80-301407 Uplink Input Shelf 1 4.8. 80-301407 Uplink Output Shelf 1 4.9. 80-301409 VHF Amplifier Shelf 1 4.10. 80-301410 UHF Lowband Amplifier Shelf 1 4.11. 80-301410 UHF Midband Amplifier Shelf 1 4.12. 80-301410 UHF Highband Amplifier Shelf 1 4.13. 80-301411 800MHz Amplifier Shelf 1 4.14 96-300064 PSU 2
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 81 of 148 Downlink Input Shelf 80-301407ABCDEFG07-022005 07-00481507-00574502-010701460.4 to 450.5MHz02-010701482.5 to 483.8MHz02-010901507.0 to 507.3MHz4.5. 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 A Downlink Input from leaky Feeder B Downlink Input Test Port (30dB Tap) C Port 1. Downlink VHF Output to VHF Amplifier Shelf 80-301409 D Port 2. Downlink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410 E Port 3. Downlink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410 F Port 4. Downlink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410 G Port 5. Downlink 800MHz Output to 800MHz Amplifier Shelf 80-301411
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 82 of 148 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 L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 83 of 148 DOWNLINK INPUT DOWNLINK INPUTTEST PORT12345A B HCDEFG4.5.3. Downlink Input Shelf 80-301407 Specification PARAMETER SPECIFICATIONInsertion Loss from Downlink Input port to port indicatedVHF 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. Downlink Input Shelf 80-301407 Illustrations 4.5.4.1. Rear View A Downlink Input from Radiating Cable B Downlink Input Test Port (30dB Tap) C Port 1. Downlink VHF Output to VHF Amplifier Shelf 80-301409 D Port 2. Downlink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410 E Port 3. Downlink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410 F Port 4. Downlink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410 G Port 5. Downlink 800MHz Output to 800MHz Amplifier Shelf 80-301411 H Earth Connection
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 84 of 148 4.5.5. Downlink Input Shelf 80-301407 Major Sub Components section Component PartComponent Part Description Qty Per Assembly4.5.5.1. 02-010701 Bandpass Filter 2 4.5.5.2. 02-010901 Bandpass Filter 1 4.5.5.3. 07-004815 Crossband Splitter/Coupler 550/800MHz 1 4.5.5.4. 07-005754 Crossband Splitter/Coupler VHF/UHF 1 4.5.5.5. 07-022005 30dB Bi-Directional Coupler 1 4.5.5.1. Bandpass Filter (02-010701) The bandpass filters are multi-section designs with a bandwidth dependent upon the passband frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with a passband design ripple of 0.1dB. The filters are of combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit. The tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR figure and 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 SPECIFICATIONUHF Low Downlink 460.4 to 460.5 MHz PassbandFrequency UHF Mid Downlink 482.5 to 483.8 MHz UHF Low 0.1 MHz Bandwidth UHF Mid 1.3 MHz Number of sections 5 Insertion loss 2.5 dB (typical) VSWR better than 1.2:1 Connectors SMA Power Handling 100W max operation -20°C to +60°C Temperaturerange storage -40°C to +70°C Weight 3 kg (typical) 4.5.5.2. Bandpass Filter 02-010901 Bandpass Filter 02-010901 is a multi-section design with a bandwidth dependent upon the passband frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with a passband design ripple of 0.1dB. The filters are of helical & combline design respectively, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit. The body and tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR figure and 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 Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 85 of 148 02-010901 specification SPECIFICATION PARAMETERPassbandFrequency Downlink 507.0 to 507.3MHz Bandwidth Downlink 0.3 MHz Insertion Loss 2.9 dB (typical) Power Rating 50W Impedance 50ȍVSWR Better than 1.2:1 Connectors SMA Weight 3Kg (approximately) 4.5.5.3. Crossband Splitter/Coupler 550/800MHz (07-004815) The purpose of Crossband Splitter/Coupler (07-004815) is to split or combine RF signals from different parts of the frequency spectrum. It is a 3 port device comprising two filters, one a low pass, the other a high pass, connected to a common input/output. The couplers are housed in a machined aluminium casing having a centre screening wall between the filter sections and lid secured by screws at frequent intervals over its perimeter to obtain a tight seal and to ensure linearity and stability of response. 07-004815 Specification Parameter Low Pass Port High Pass Port Passband Frequencies 380 to 550MHz 800 to 960MHz Insertion loss <0.5dB <0.5dB Isolation between Bands >50dB >50dB VSWR 1.3:1 Impedance 50 ohm Power rating 50W operation -20C to +60CTemperaturerange storage -40C to +70CRF Connectors SMA (female) Weight <1kg 4.5.5.4. Crossband Splitter/Coupler VHF/UHF (07-005754) The purpose of Crossband Splitter/Coupler (07-005754) is to split or combine RF signals from different parts of the frequency spectrum. It is a 3 port device comprising two filters, one a low pass, the other a high pass, connected to a common input/output. The couplers are housed in a machined aluminium casing having a centre screening wall between the filter sections and lid secured by screws at frequent intervals over its perimeter to obtain a tight seal and to ensure linearity and stability of response.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 86 of 148 07-005754 Specification Parameter Low Pass Port High Pass Port Passband Frequencies 70 to 175 MHz 380 to 500 MHz Insertion loss <0.5dB <0.5dB Return loss >14dB typical >14dB typical Isolation between Bands >60dB >60dB Impedance 50 ohm Power rating 50W operation -20C to +60CTemperaturerange storage -40C to +70CRF Connectors SMA (female) Weight <1kg 4.5.5.5. 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 SPECIFICATIONFrequency Range 100kHz – 2.7GHzMainline Insertion Loss < 1.0 dB Coupling Loss 30 dB Coupling Loss Tolerance +/-2.0 dB VSWR Mainline Better than 1.4:1 Impedance 50 ȍPower Handling (CW) 5W Outline (W x D x H) 44.5mm x 41mm x 27mm (ex. connectors) Connectors SMA (female) on all ports Case Material Aluminium Finish Iridite NCP Operating Temperature -20 to +55°C Weather Protection IP54
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 87 of 148 Downlink Output Shelf 80-301408FGABCDE07-01800507-00481507-00574502-010701460.4 to 450.5MHz02-010701482.5 to 483.8MHz02-010901507.0 to 507.3MHz4.6. 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 A Port A. Downlink VHF Input from VHF Amplifier Shelf 80-301409 B Port B. Downlink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410 C Port C. Downlink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410 D Port D. Downlink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410 E Port E. Downlink 800MHz Input from 800MHz Amplifier Shelf 80-301411 F Downlink Output to Radiating Cable G Downlink Output Test Port (30dB Tap)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 88 of 148 4.6.2. Downlink Output Shelf 80-301408 Outline Drawing Drawing Number 80-301498
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 89 of 148 4.6.3. Downlink Output Shelf 80-301408 Specification PARAMETER SPECIFICATIONInsertion 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. Downlink Output Shelf 80-301408 Illustrations 4.6.4.1. Rear View A Port A. Downlink VHF Input from VHF Amplifier Shelf 80-301409 B Port B. Downlink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410 C Port C. Downlink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410 D Port D. Downlink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410 E Port E. Downlink 800MHz Input from 800MHz Amplifier Shelf 80-301411 F Downlink Output to Radiating Cable G Downlink Output Test Port (30dB Tap) H Earth Connection
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 90 of 148 4.6.5. Downlink Output Shelf 80-301408 Major Sub Components Section Component PartComponent Part Description Qty Per Assembly4.5.5.1. 02-010701 Bandpass Filter 2 4.5.5.2. 02-010901 Bandpass Filter 1 4.5.5.3. 07-004815 Crossband Splitter/Coupler 550/800MHz 1 4.5.5.4. 07-005754 Crossband Splitter/Coupler VHF/UHF 1 4.5.5.1. 07-018005 30dB Directional Coupler 1 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 SPECIFICATIONFrequency Range 70 MHz - 1000MHzMainline Insertion Loss <0.5 Coupling Loss 30 dB VSWR Mainline Better than 1.3:1 Impedance 50 ȍPower 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 -20C to +60CTemperaturerange storage -40C to +70CWeather Protection IP54
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 91 of 148 Uplink Input Shelf80-301407ABCDEFG07-02200507-00481507-00574502-010701465.4 to 465.5MHz02-010701485.7 to 486.8MHz02-010901510.0 to 510.3MHz4.7. 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 stagesUplink 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 A Uplink Input from Radiating Cable B Uplink Input Test Port (30dB Tap) C Port F. Uplink VHF Output to VHF Amplifier Shelf 80-301409 D Port G. Uplink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410 E Port H. Uplink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410 F Port I. Uplink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410 G Port J. Uplink 800MHz Output to 800MHz Amplifier Shelf 80-301411
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 92 of 148 UPLINK INPUT UPLINK INPUTTEST PORTFGHIJA B HCDEFG4.7.2. 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 SPECIFICATIONInsertion Loss from from Uplink Input port to port indicatedVHF 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. Uplink Input Shelf 80-301407 Illustrations 4.7.4.1. Rear View A Uplink Input from Radiating Cable B Uplink Input Test Port (30dB Tap) C Port F. Uplink VHF Output to VHF Amplifier Shelf 80-301409 D Port G. Uplink UHF Lowband Output to UHF Lowband Amplifier Shelf 80-301410 E Port H. Uplink UHF Midband Output to UHF Midband Amplifier Shelf 80-301410 F Port I. Uplink UHF Highband Output to UHF Highband Amplifier Shelf 80-301410 G Port J. Uplink 800MHz Output to 800MHz Amplifier Shelf 80-301411 H Earth Connection
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 93 of 148 4.7.5. Uplink Input Shelf 80-301407 Major Sub Components section Component PartComponent Part Description Qty Per Assembly4.5.5.1. 02-010701 Bandpass Filter 2 4.5.5.2. 02-010901 Bandpass Filter 1 4.5.5.3. 07-004815 Crossband Splitter/Coupler 550/800MHz 1 4.5.5.4. 07-005754 Crossband Splitter/Coupler VHF/UHF 1 4.5.5.5. 07-022005 30dB Bi-Directional Coupler 1 These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 94 of 148 Uplink Output Shelf 80-301407FGABCDE07-022005 07-00481507-00574502-010701465.4 to 465.5MHz02-010701485.7 to 486.8MHz02-010901510.0 to 510.3MHz4.8. 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 A Port 6. Uplink VHF Input from VHF Amplifier Shelf 80-301409 B Port 7. Uplink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410 C Port 8. Uplink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410 D Port 9. Uplink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410 E Port 10. Uplink 800MHz Input from 800MHz Amplifier Shelf 80-301411 F Uplink Output to Radiating Cable G Uplink Output Test Port (30dB Tap)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 95 of 148 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 SPECIFICATIONInsertion 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. Uplink Output Shelf 80-301407 Illustrations 4.8.4.1. Rear View A Port 6. Uplink VHF Input from VHF Amplifier Shelf 80-301409 B Port 7. Uplink UHF Lowband Input from UHF Lowband Amplifier Shelf 80-301410 C Port 8. Uplink UHF Midband Input from UHF Midband Amplifier Shelf 80-301410 D Port 9. Uplink UHF Highband Input from UHF Highband Amplifier Shelf 80-301410 E Port 10. Uplink 800MHz Input from 800MHz Amplifier Shelf 80-301411 F Uplink Output to Radiating Cable G Uplink Output Test Port (30dB Tap) H Earth Connection
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 96 of 148 4.8.5. Uplink Output Shelf 80-301407 Major Sub Components section Component PartComponent Part Description Qty Per Assembly4.5.5.1. 02-010701 Bandpass Filter 2 4.5.5.2. 02-010901 Bandpass Filter 1 4.5.5.3. 07-004815 Crossband Splitter/Coupler 550/800MHz 1 4.5.5.4. 07-005754 Crossband Splitter/Coupler VHF/UHF 1 4.5.5.5. 07-022005 30dB Bi-Directional Coupler 1 These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 97 of 148 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 98 of 148 4.9.1. VHF Amplifier Shelf 80-301409 System Diagram Drawing Number 80-301489
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 99 of 148 4.9.2. VHF Amplifier Shelf 80-301409 Outline Drawing Drawing Number 80-301499
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 100 of 148 4.9.3. VHF Amplifier Shelf 80-301409 Specification Parameter SpecificationDownlinkDownlink Passband 154.0 to 161.5MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +34.0dBm ALC setting 1dB below P1dB 3rd Order Intercept point +45.0dBm UplinkUplink Passband 155.5 – 161.0MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +34.0dBm ALC setting +27dBm 3rd Order Intercept point +45.0dBm Noise Figure < 10dB Mechanical SpecificationMechanical 4U, 19” Rack Mount RF Connectors N-Type Female Alarm Interfaces Local Alarms to SCADADry Contact with LED Indication per path Power Supply 24V DC 4.9.4. VHF Amplifier Shelf 80-301409 Illustrations 4.9.4.1. Front View A Green LED “Power On” B Red LED “Alarm” VHF Uplink path C Red LED “Alarm” VHF Downlink path
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 101 of 148 24v DC I/PALARMFUSE T 3.15ADOWNLINK O/P UPLINK O/PDOWNLINK I/P UPLINK I/P0dB 0dB 0dB 0dB2dB 4dB 8dB 16dB0dB 0dB 0dB 0dB2dB 4dB 8dB 16dBUPLINK DOWNLINKABCDFGHIEJ4.9.4.2. Rear View A VHF Downlink Input from Downlink Input Shelf 80-301407 Port 1 B VHF Downlink Output to Downlink Output Shelf 80-301408 Port A C VHF Uplink Input from Uplink Input Shelf 80-301407 Port F D VHF Uplink Output to Uplink Output Shelf 80-301407 Port 6 E VHF Downlink Switched Attenuator 0 to 30 dB F VHF Uplink Switched Attenuator 0 to 30 dB G 24V DC Input H 3.15A Fuse for 24V DC Input I Alarm Output J Earth Connection 4.9.5. VHF Amplifier Shelf 80-301409 Major Sub Components Section Component PartComponent Part Description Qty Per Assembly4.9.5.1. 01-002503 Bandpass Filter 4 4.9.5.2. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 2 4.9.5.3. 12-025602 VHF Power Amplifier 5W 2 17-001101 AGC Detector Assembly 2 4.9.5.4.17-001201 AGC Attenuator Assembly 2 4.9.5.5. 20-001602 24V Dual Relay Assembly 1 4.9.5.6. 94-100004 Dual Diode Assembly 1
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 102 of 148 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 PARAMETERDownlink 154.0 MHz to 161.5 MHz BandpassFrequency Uplink 155.5 MHz to 161.0 MHz Downlink 7.5MHz Bandwidth Uplink 5.5MHz No. of sections 6 Insertion loss 1.2dB VSWR Better than 1.2:1 Connectors SMA Power handling 100W maximum operational -20°C to +60°C Temperaturerange store -40°C to +70°C Weight 3 kg Size 384 x 82.5 x 56.4mm 4.9.5.2. 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 SPECIFICATIONAttenuation Values 0-30dB Attenuation Steps 2, 4, 8 and 16dB Power Handling 0.25 Watt Attenuation Accuracy ± 1.0 dB Frequency Range DC to 1GHz Impedance 50ȍConnectors SMA VSWR 1.3:1 Weight 0.2kg operation -20°C to +60°C Temperaturerange storage -40°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 103 of 148 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 semi-conductor 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 SPECIFICATIONFrequency range 108 to 174 MHz (as required) Maximum RF output > 5Watts Gain t 34 dB 1dB compression point t +37 dBm3rd order intercept point t +48 dBmIn / RL 16 dB Out / RL 15 dB Noise Figure  9.5 dB Max Connectors SMA female Supply 24 +/- 0.5 Vdc @ 1040 mA Max operational -10qC to +60qCTemperaturerange storage -20qC to +70qC7-Way Connector Pin-out details Connector Pin SignalA1 (large pin) +24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 104 of 148 4.9.5.4. Automatic Gain Control 17-001101 AGC Detector Assembly 17-001201 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 105 of 148 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 SPECIFICATIONOperating 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 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals operational -10°C to +60°C Temperaturerange 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 106 of 148 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 107 of 148 4.10.1. UHF Lowband Amplifier Shelf 80-301410 System Diagram Drawing Number 80-301490
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 108 of 148 4.10.2. UHF Lowband Amplifier Shelf 80-301410 Outline Drawing Drawing Number 80-3014100
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 109 of 148 4.10.3. UHF Lowband Amplifier Shelf 80-301410 Specification Parameter SpecificationDownlinkDownlink Passband 460.4 to 460.5MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +42.5dBm ALC setting 1dB below P1dB 3rd Order Intercept point +53.5dBm UplinkUplink Passband 465.4 – 465.5MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +36.5dBm ALC setting +27dBm 3rd Order Intercept point > +48.0dBm Noise Figure < 3.0dB Mechanical SpecificationMechanical 4U 19” Rack Mount RF Connectors N-Type Female Alarm Interfaces Local Alarms to SCADADry Contact with LED Indication per path Power Supply 24V DC 4.10.4. UHF Lowband Amplifier Shelf 80-301410 Illustrations 4.10.4.1. Front View A Green LED “Power On” B Red LED “Alarm” UHF Lowband Uplink path C Red LED “Alarm” UHF Lowband Downlink path
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 110 of 148 24v DC I/PALARMFUSE T 10AUHF DOWNLINK O/P UHF UPLINK O/PUHF DOWNLINK I/P UHF UPLINK I/P0dB 0dB 0dB 0dB2dB 4dB 8dB 16dB0dB 0dB 0dB 0dB2dB 4dB 8dB 16dBUPLINK DOWNLINKABCDFGHIEJUPLINK 465.4 - 465.5 MHzDOWNLINK 460.4 - 460.5 MHz4.10.4.2. Rear View N.B. UPLINK 465.4 - 465.5 MHz DOWNLINK 460.4 - 460.5 MHz A UHF Lowband Downlink Input from Downlink Input Shelf 80-301407 Port 2 B UHF Lowband Downlink Output to Downlink Output Shelf 80-301408 Port B C UHF Lowband Uplink Input from Uplink Input Shelf 80-301407 Port G D UHF Lowband Uplink Output to Uplink Output Shelf 80-301407 Port 7 E UHF Lowband Downlink Switched Attenuator 0 to 30 dB F UHF Lowband Uplink Switched Attenuator 0 to 30 dB G 24V DC Input H 10A Fuse for 24V DC Input I Alarm Output J Earth Connection 4.10.5. UHF Lowband Amplifier Shelf 80-301410 Major Sub Components Section ComponentPartComponent Part Description Qty Per Assembly 4.10.5.1. 07-002908 30dB Directional Coupler 1 4.10.5.2. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 2 4.10.5.3. 11-005401 Low Noise Amplifier 1 4.10.5.4. 12-016301 20W Power Amplifier 1 4.10.5.5. 12-021601 TETRA Power Amplifier 5W 1 4.10.5.6. 12-021801 TETRA Power Amplifier 1W 1 17-001101 AGC Detector Assembly 1 17-001105 AGC Detector Assembly (Logarithmic) 1 4.10.5.7.17-001201 AGC Attenuator Assembly 2 4.10.5.8. 20-001602 24V Dual Relay Assembly 1 4.10.5.9. 80-008909 12V Relay Assembly 1 4.10.5.10. 94-100004 Dual Diode Assembly 1 4.10.5.11. 96-200024 DC/DC Converter 1
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 111 of 148 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 SPECIFICATIONFrequency range 50 - 1000MHz Insertion loss <0.3dB Coupling level -30dB Rejection N/A Weight <200gms Connectors N type, female operation -20°C to +60°C Temperaturerange storage -40°C to +70°C 4.10.5.2. 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 SPECIFICATIONAttenuation Values 0-30dB Attenuation Steps 2, 4, 8 and 16dB Power Handling 0.25 Watt Attenuation Accuracy ± 1.0 dB Frequency Range DC to 1GHz Impedance 50ȍConnectors SMA VSWR 1.3:1 Weight 0.2kg operation -20°C to +60°C Temperaturerange storage -40°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 112 of 148 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 SPECIFICATIONFrequency range 380 - 500MHz Bandwidth <100MHz (as required, tuneable) 1dB compression point >+20dBm 3rd order intercept >+33dBm Gain >15.5dB (typical) VSWR better than 1.5:1 Input return loss >14dB Noise figure <2.0dB (typical) Connectors SMA female Supply 115mA at 12V DC operational -10°C to +60°C Temperaturerange storage -40°C to +70°C Size 88 x 50 x 34mm (ex. connectors) Weight 0.26kg LNA ‘D’ Connector Pin-out details Connector pin Signal1 +ve input (10-24V) 2 GND 3 Alarm relay O/P bad 4 Alarm relay common 5 Alarm relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad 9-Way Pin-Out Graphical Representation
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 113 of 148 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 SPECIFICATIONFrequency range 380-470MHz Small signal gain 23dB Gain flatness ±1.7dB I/O Return loss >18dB 1dB compression point 43dBm OIP3 55dBm Supply voltage 24V DC Supply current 3.8Amps (Typical) operational -10°C to +60°C Temperaturerange storage -20°C to +70°C Weight <2kg (no heatsink) 7-Way Connector Pin-out details Connector Pin SignalA1 (large pin) +10-24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 114 of 148 A1 A21 23 4 54.10.5.5. 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 semi-conductor 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 SPECIFICATIONFrequency range: 380-470MHz (as required) Bandwidth: 10-40MHz (typical, tuned to spec.) Maximum RF output: 5Watts Gain: 30dB 1dB compression point: +37.5dBm 3rd order intercept point: +50dBm VSWR: better than 1.5:1 Connectors: SMA female Supply: 1.9Amps @ 12V DC Weight: 1kg (excluding heatsink) operational: -10qC to +60qCTemperaturerange: storage: -20qC to +70qC7-Way Connector Pin-out details Connector Pin SignalA1 (large pin) +10-24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL) 7-Way Pin-Out Graphical Representation
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 115 of 148 7 8 961 2 3 4 59-Way Pin-Out Graphical Representation3.10.5.6. 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 SPECIFICATIONTemperature -20 to +70 qCFrequency Range 380 - 500 MHz Small Signal Gain 15.5 +/- 0.5 dB Gain Flatness 0.7 dB p-p Max 'Gain vs. Temperature 0.7 dB Max In RL 20 dB Min Out RL 20 dB Min Output Power @ 1dB Compression Point 30.5 dBm Min Output 3rd Order IP 41.5 dBm Min Noise Figure 6 dB Max DC Supply Voltage 10-15 Vdc DC Supply Current 540 mA Max operational: -10qC to +60qCTemperaturerange storage: -40qC to +100qCWeight: <0.5 kg Size: 110.5 x 66mm x 24.6mm 9-Way Connector Pin-outsConnector pin Signal1 +ve input (10-15V) 2 GND 3 Alarm relay O/P bad 4 Alarm relay common 5 Alarm relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 116 of 148 4.10.5.7. Automatic Gain Control 17-001101 AGC Detector Assembly 17-001105 AGC Detector Assembly (Logarithmic) 17-001201 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 Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 117 of 148 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 SPECIFICATIONOperating 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 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals operational -10°C to +60°C Temperaturerange 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 SPECIFICATIONOperating 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 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals operational -10°C to +60°C Temperaturerange storage -20°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 118 of 148 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 SPECIFICATIONInput Voltage range 18-28V DC Output voltage 12V±0.5V Max. current load 5.0 Amps operation -10°C to +60°C Temperaturerange storage -20°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 119 of 148 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 Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 120 of 148 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 SpecificationDownlinkDownlink Passband 482.5 to 483.8MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +42.5dBm ALC setting 1dB below P1dB 3rd Order Intercept point +53.5dBm UplinkUplink Passband 485.7 to 486.8MHzMaximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +36.5dBm ALC setting +27dBm 3rd Order Intercept point +48.0dBm Noise Figure < 3.0dB Mechanical SpecificationMechanical 4U 19” Rack Mount RF Connectors N-Type Female Alarm Interfaces Local Alarms to SCADADry Contact with LED Indication per path Power Supply 24V DC 4.11.4. UHF Lowband Amplifier Shelf 80-301410 Illustrations 4.11.4.1. Front View A Green LED “Power On” B Red LED “Alarm” UHF Midband Uplink path C Red LED “Alarm” UHF Midband Downlink path
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 121 of 148 24v DC I/PALARMFUSE T 10AUHF DOWNLINK O/P UHF UPLINK O/PUHF DOWNLINK I/P UHF UPLINK I/P0dB 0dB 0dB 0dB2dB 4dB 8dB 16dB0dB 0dB 0dB 0dB2dB 4dB 8dB 16dBUPLINK DOWNLINKABCDFGHIEJUPLINK 485.7 - 486.8 MHzDOWNLINK 482.5 - 483.8 MHz4.11.4.2. Rear View N.B. UPLINK 485.7 - 486.8 MHz DOWNLINK 482.5 - 483.8 MHz A UHF Midband Downlink Input from Downlink Input Shelf 80-301407 Port 3 B UHF Midband Downlink Output to Downlink Output Shelf 80-301408 Port C C UHF Midband Uplink Input from Uplink Input Shelf 80-301407 Port H D UHF Midband Uplink Output to Uplink Output Shelf 80-301407 Port 8 E UHF Midband Downlink Switched Attenuator 0 to 30 dB F UHF Midband Uplink Switched Attenuator 0 to 30 dB G 24V DC Input H 10A Fuse for 24V DC Input I Alarm Output J 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 ComponentPartComponent Part Description Qty Per Assembly 4.10.5.1. 07-002908 30dB Directional Coupler 1 4.10.5.2. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 2 4.10.5.3. 11-005401 Low Noise Amplifier 14.10.5.4. 12-016301 20W Power Amplifier 1 4.10.5.5. 12-021601 TETRA Power Amplifier 5W 1 4.10.5.6. 12-021801 TETRA Power Amplifier 1W 1 17-001101 AGC Detector Assembly 1 17-001105 AGC Detector Assembly (Logarithmic) 1 4.10.5.7.17-001201 AGC Attenuator Assembly 2 4.10.5.8. 20-001602 24V Dual Relay Assembly 1 4.10.5.9. 80-008909 12V Relay Assembly 1 4.10.5.10. 94-100004 Dual Diode Assembly 1 4.10.5.11. 96-200024 DC/DC Converter 1
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 122 of 148 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 123 of 148 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 SpecificationDownlinkDownlink Passband 507.0 to 507.3MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +42.5dBm ALC setting 1dB below P1dB 3rd Order Intercept point +53.5dBm UplinkUplink Passband 510.0 to 510.3MHzMaximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +36.5dBm ALC setting +27dBm 3rd Order Intercept point +48.0dBm Noise Figure < 3.0dB Mechanical SpecificationMechanical 4U 19” Rack Mount RF Connectors N-Type Female Alarm Interfaces Local Alarms to SCADADry Contact with LED Indication per path Power Supply 24V DC 4.12.4. UHF Highband Amplifier Shelf 80-301410 Illustrations 4.12.4.1. Front View A Green LED “Power On” B Red LED “Alarm” UHF Highband Uplink path C Red LED “Alarm” UHF Highband Downlink path
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 124 of 148 24v DC I/PALARMFUSE T 10AUHF DOWNLINK O/P UHF UPLINK O/PUHF DOWNLINK I/P UHF UPLINK I/P0dB 0dB 0dB 0dB2dB 4dB 8dB 16dB0dB 0dB 0dB 0dB2dB 4dB 8dB 16dBUPLINK DOWNLINKABCDFGHIEJUPLINK 510.0 - 510.3 MHzDOWNLINK 507.0 - 507.3 MHz4.12.4.2. Rear View N.B. UPLINK 510.0 - 510.3 MHz DOWNLINK 507.0 - 507.3 MHz A UHF Highband Downlink Input from Downlink Input Shelf 80-301407 Port 4 B UHF Highband Downlink Output to Downlink Output Shelf 80-301408 Port D C UHF Highband Uplink Input from Uplink Input Shelf 80-301407 Port I D UHF Highband Uplink Output to Uplink Output Shelf 80-301407 Port 9 E UHF Highband Downlink Switched Attenuator 0 to 30 dB F UHF Highband Uplink Switched Attenuator 0 to 30 dB G 24V DC Input H 10A Fuse for 24V DC Input I Alarm Output J 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 ComponentPartComponent Part Description Qty Per Assembly 4.10.5.1. 07-002908 30dB Directional Coupler 1 4.10.5.2. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 2 4.10.5.3. 11-005401 Low Noise Amplifier 14.10.5.4. 12-016301 20W Power Amplifier 1 4.10.5.5. 12-021601 TETRA Power Amplifier 5W 1 4.10.5.6. 12-021801 TETRA Power Amplifier 1W 1 17-001101 AGC Detector Assembly 1 17-001105 AGC Detector Assembly (Logarithmic) 1 4.10.5.7.17-001201 AGC Attenuator Assembly 2 4.10.5.8. 20-001602 24V Dual Relay Assembly 1 4.10.5.9. 80-008909 12V Relay Assembly 1 4.10.5.10. 94-100004 Dual Diode Assembly 1 4.10.5.11. 96-200024 DC/DC Converter 1
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 125 of 148 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 Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 126 of 148 4.13.1. 800MHz Amplifier Shelf 80-301411 System Diagram Drawing Number 80-301491
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 127 of 148 4.13.2. 800MHz Amplifier Shelf 80-301411 Outline Drawing Drawing Number 80-3014101
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 128 of 148 ALARMUPLINKALARMDOWNLINKPOWERA B C4.13.3. 800MHz Amplifier Shelf 80-301411 SpecificationParameter SpecificationDownlinkDownlink Passband 856.0 to 861.0MHz Maximun gain 30dB Gain Adjustment 0 – 30dB in 2dB steps 1dB Compression Point (P1dB) +44.0dBm ALC setting 1dB below P1dB 3rd Order Intercept point +54.0dBm UplinkUplink Passband 811.0 to 816.0MHz Maximun gain 30dB Gain Adjustment 0 to 30dB in 2dB steps 1dB Compression Point (P1dB) +36.0dBm ALC setting +27dBm 3rd Order Intercept point +46.0 dBm Noise Figure < 5.0 dB Mechanical SpecificationMechanical 8U 19” Rack Mount RF Connectors N-Type Female Alarm Interfaces Local Alarms to SCADADry Contact with LED Indication per path Power Supply 24V DC 4.13.4. 800MHz Amplifier Shelf 80-301411 Illustrations 4.13.4.1. Front View A Green LED “Power On” B Red LED “Alarm” 800MHz Downlink path C Red LED “Alarm” 800MHz Uplink path
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 129 of 148 DOWNLINK OUTPUTDOWNLINK INPUT UPLINK INPUTUPLINK OUTPUT800 MHzALARMFUSE 20AA B DC24V DC I/P0dB 0dB 0dB 0dB2dB 4dB 8dB 16dB0dB 0dB 0dB 0dB2dB 4dB 8dB 16dBUPLINK DOWNLINKJHHGIEF4.13.4.2. Rear View A 800MHz Downlink Input from Downlink Input Shelf 80-301407 Port 5 B 800MHz Downlink Output to Downlink Output Shelf 80-301408 Port E C 800MHz Uplink Input from Uplink Input Shelf 80-301407 Port J D 800MHz Uplink Output to Uplink Output Shelf 80-301407 Port 10 E Downlink Switched Attenuator 0 to 30 dB F Uplink Switched Attenuator 0 to 30 dB G 24V DC Input H 20A Fuse for 24V DC Input I Alarm Output J Earth Connection 4.13.5. 800MHz Amplifier Shelf 80-301411 Major Sub Components Section ComponentPartComponent Part Description Qty Per Assembly 4.13.5.1. 02-011601 Bandpass FIlter 4 4.13.5.2. 05-002602 Splitter/Combiner, 20W 2 4.13.5.3. 07-002907 30dB Directional Coupler 1 4.13.5.4. 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 2 4.13.5.5. 11-005902 Low Noise Amplifier 1 4.13.5.6. 12-018601 5W Power Amplifier 1 4.13.5.7. 12-020501 20W Power Amplifier 2 17-001101 AGC Detector Assembly 1 17-001105 AGC Detector Assembly (Logarithmic) 1 4.13.5.8.17-001201 AGC Attenuator Assembly 2 4.13.5.9. 20-001602 24V Relay Dual Assembly 1 4.13.5.10. 94-100004 Dual Diode Assembly 1 4.13.5.11. 96-200024 DC/DC Converter, 24V in, 12V 5A out 1
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 130 of 148 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 SPECIFICATIONDownlink 856 to 861MHz FrequencyRange Uplink 811 to 816MHz Downlink 5 MHz Bandwidth Uplink 5 MHz Number of Sections 8 Insertion Loss 1.2 dB VSWR better than 1.2:1 Connectors SMA Power Handling 100W max operation -10°C to +55°C Temperaturerange storage -40°C to +70°C Weight 3 kg (typical) 4.13.5.2. 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 SPECIFICATIONFrequency Range 856 – 861MHz Bandwidth 5MHz Ports 3 Insertion loss 3.3dB Return loss input & output 1.3:1 Impedance 50ȍIsolation >20dB MTFB >180,000 hours Splitting 20Watts Power rating Combining 0.5Watt Connectors SMA female Weight 200g (approximately) Size 54 x 44 x 21mm
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 131 of 148 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 SPECIFICATIONFrequency range 800 - 1000MHz Insertion loss <0.3dB Coupling level -30dB ±0.5dB Rejection N/A Weight <200g Connectors SMA, female operation -20°C to +60°C Temperaturerange storage -40°C to +70°C 4.13.5.4. 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 SPECIFICATIONAttenuation Values 0-30dB Attenuation Steps 2, 4, 8 and 16dB Power Handling 0.25 Watt Attenuation Accuracy ± 1.0 dB Frequency Range DC to 1GHz Impedance 50ȍConnectors SMA VSWR 1.3:1 Weight 0.2kg operation -20°C to +60°C Temperaturerange storage -40°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 132 of 148 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 SPECIFICATIONFrequency range 800 – 960MHz Bandwidth <170MHz Gain 19.5dB (typical) 1dB compression point +21dBm OIP3 +33dBm Input/output return loss >20dB Noise figure 1dB (typical) Power consumption 190mA @ 24V DC Supply voltage 10-24V DC Connectors SMA female operational -10°C to +60°C Temperaturerange storage -40°C to +70°C Size 90 x 55 x 30.2mm Weight 0.28kg LNA ‘D’ Connector Pin-out details Connector pin Signal1 +Ve input (10-24V) 2 GND 3 Alarm relay O/P bad 4 Alarm relay common 5 Alarm relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 133 of 148 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 SPECIFICATIONFrequency range 800-960MHz Small signal gain 30dB Gain flatness ±0.5dB I/O Return loss >20dB 1dB compression point +37dBm OIP3 +52dBm Supply voltage 12V DC Supply current 2.0Amps (typical) operational -10°C to +60°C Temperaturerange storage -20°C to +70°C Weight <2kg (no heatsink) PA 7-Way Connector Pin-outs Connector Pin SignalA1 (large pin) +12V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 134 of 148 A1 A21 23 4 57-Way Connector Graphical Representation4.13.5.7. 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 SPECIFICATIONFrequency range 800-960MHz Small signal gain 31.5dB Gain flatness ±0.6dB I/O Return loss >18dB 1dB compression point +43.5dBm OIP3 +54dBm Supply voltage 24V DC Supply current 4.6Amps @12V(typical) operational -10°C to +60°C Temperaturerange storage -20°C to +70°C Weight <2kg (no heatsink) PA 7-Way Connector Pin-outs Connector Pin SignalA1 (large pin) +24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 135 of 148 4.13.5.8. Automatic Gain Control 17-001101 AGC Detector Assembly 17-001105 AGC Detector Assembly (Logarithmic) 17-001201 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 (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 Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 136 of 148 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 SPECIFICATIONOperating 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 10.0µA/10.0mV Relay isolation 1.5kV Mechanical life >2x107 operations Relay approval BT type 56 Connector details Screw terminals operational -10°C to +60°C Temperaturerange 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 SPECIFICATIONInput Voltage range 18-28V DC Output voltage 12V±0.5V Max. current load 5.0 Amps operation -10°C to +60°C Temperaturerange storage -20°C to +70°C
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 137 of 148 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 AC Input Supply 110 or 220V nominal Voltages 90 to 132 or 180 to 264V (absolute limits) Frequency 47 to 63Hz DC Output Supply: 24V DC (nominal) Voltage 22 to 26V (absolute limits) Maximum current 40A
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 138 of 148 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 139 of 148 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 140 of 148 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. x Mains power not connected or not switched on. x External connectors not fitted or incorrectly fitted. x Internal connectors becoming loose due to transport vibration. x Wiring becoming detached as a result of heavy handling. x Input signals not present due to faults in the antenna and feeder system. x Base transmissions not present due to fault at the base station. x Modems fitted with incorrect software configuration. x Changes to channel frequencies and inhibiting channels. x Hand held radio equipment not set to repeater channels. x Hand held radio equipment not set to correct base station. 6.1.2 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 piggy-back 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 141 of 148 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 NOTEIndividual 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 142 of 148 6.2 Tools & Test Equipment The minimum tools and test equipment needed to successfully service this Axell product are as follows-Spectrum 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 1 Remove power to the unit 2 Remove all visible connectors (RF, DC & alarm) 3 Release module retaining screws. 4 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) 1 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. 2 Reconnect all connectors, RF, alarm, power etc., (concealed connectors may have to be connected first). 3 Replace retaining screws (if any). 4 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.
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 143 of 148 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 1 Disconnect the mains power supply and disconnect the 24V dc supply connector for the LPA. 2 Disconnect the RF input and output cables from the LPA. 3 Disconnect the alarm connector. 4 Remove the alarm monitoring wires from (D type connector) pins 9 and 10. 5 Remove the LPA module by removing the four retaining screws, replace with a new LPA module and secure it with the screws. 6 Connect the RF cables to the LPA input and output connectors. Reconnect the wires to the alarm board connector pins 9 and 10. 7 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 L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 144 of 148 Appendix A A.1. Glossary of Terms used in this document Cell Enhancer or RepeaterA Radio Frequency (RF) amplifier which can simultaneously amplify and re-broadcast Mobile Station (MS) and Base Transceiver Station (BTS) signals. Band SelectiveRepeaterA Cell Enhancer designed for operation on a range of channels within a specified frequency band. Channel Selective RepeaterA Cell Enhancer, designed for operation on specified channel(s) within a specified frequency band. Channel frequencies may be factory set or on-site programmable. AC Alternating Current AGC Automatic Gain Control BBU Battery Backup Unit BTS Base Transceiver Station CEMS Coverage Enhanced Management System C/NR Carrier-to-Noise Ratio DC Direct Current Downlink (D/L) RF signals TX from the BTS to the Master Site FO Fibre Optic GND Ground ID Identification Number LED Light Emitting Diode LNA Low Noise Amplifier LPA Low Power Amplifier MOU Master Optical Unit M.S. Mobile Station MTBF Mean Time Between Failures N/A Not Applicable N/C No Connection OFR On Frequency Repeater OIP3 Output Third Order Intercept Point P1dB 1dB Compression Point PA Power Amplifier RF Radio Frequency RSA Receiver/Splitter Amplifier RX Receiver S/N Serial Number TX Transmitter Uplink (U/L) RF signals transmitted from the MS to the BTS VSWR Voltage Standing Wave Ratio WDM Wave division multiplex
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Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 146 of 148 A.3. EC Declaration of Conformity In accordance with BS EN ISO/IEC 17050-1&-2:2004 Aerial Facilities Limited Aerial House Asheridge Road CheshamBuckinghamshire 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. SIGNEDB. 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 L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 147 of 148 A.4. Amendment List Record Sheet Document Ref. 80-301401HBKM IssueNo.Date Incorporated by Page Nos. AmendedReason for new issue A 21/01/2008 AJS Draft 1 13/06/2008 AJS Issue
Axell Wireless Limited Technical Literature L.A. M.T.A. Remote Sites Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 148 of 148 APPENDIX B B.1. INITIAL EQUIPMENT SET-UP CALCULATIONS GENERAL INFORMATION Site Name Client Name Date AWL Equip. Model No. ANTENNA SYSTEMS Model Gain Azimuth Comments A - Service Antenna B – Donor Antenna Type Loss Length Comments C – Service Feeder D – Donor Feeder INITIAL PARAMETERS E – CE Output Power dBmF – Antenna Isolation dBG – Input signal level from donor BTS dBmOperating Voltage V DOWNLINK CALCULATIONS Parameter Comments ValueInput signal level (G) dBmCE max. o/p power (E) dBmGain setting E-GdBIsolation required (Gain + 10dB) dBService antenna gain (A) dBService antenna feeder loss (C) dBEffective radiated power (ERP)E+A-CdBmAttenuator setting CE gain-gain setting dBIf 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. UPLINK CALCULATIONS Parameter Comments ValueInput signal level dBmCE max. o/p power (E) dBmGain setting dBRequired isolation dBDonor antenna gain (B) dBDonor antenna feeder loss (D) dBEffective radiated power (ERP)E+B-D dBmAttenuator setting (CE gain-gain setting) dB

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