Axell Wireless 55 1991SERIES User Manual
UHF Bandselective Bi-Directional Amplifier
90dB 40/5W
User/Maintenance Handbook
For
Pacific Wireless Communications L.L.C.
AFL Works Order Q116107
AFL Product Part No. 55-199102
Aerial Facilities Limited
Technical Literature
Document Number 55-199102HBKM Issue No. 1 Date 05/10/2007 Page 1 of 28
UHF Bandselective BDA
90dB 40/5W
Table of Contents
1. INTRODUCTION..........................................................................................................................3
1.1. Scope and Purpose of Document ............................................................................................. 3
1.2. Limitation of Liability Notice ......................................................................................................3
2. SAFETY CONSIDERATIONS......................................................................................................4
2.1. Earthing of Equipment ..............................................................................................................4
2.2. Electric Shock Hazard............................................................................................................... 4
2.3. RF Radiation Hazard ................................................................................................................4
2.4. Lifting and other Health and Safety Recommendations............................................................ 4
2.5. Chemical Hazard ......................................................................................................................5
2.6. Laser safety ..............................................................................................................................5
2.7. Emergency Contact Numbers...................................................................................................5
3. EQUIPMENT OVERVIEW............................................................................................................6
3.1. UHF Bandselective, BDA (55-199102) List of major sub modules ...........................................7
3.2. UHF Bandselective, BDA (55-199102) Specification................................................................7
3.3. UHF Bandselective, BDA (55-199102) System Schematic..........................................................8
3.4. Photographs.............................................................................................................................. 9
3.4.1. Front of case – door closed................................................................................................ 9
3.4.2. Front of case – door open ................................................................................................ 10
3.4.3. Right Hand and Left Hand sides ...................................................................................... 11
4. UHF BANDSELECTIVE, BDA (55-199102) SUB MODULES...................................................12
4.1. Bandpass Filter (02-010701) ..................................................................................................12
4.2. 3dB Splitter/Combiner (05-002603) ........................................................................................13
4.3. Remote Attenuator Switch Assembly (‘10-001725’) ...............................................................13
4.4. 5 Watt Tetra Amplifier (12-021601)......................................................................................... 14
4.5. Linearised Power Amplifier (12-026901)................................................................................. 15
4.6. Voltage Regulator Board 9.0V (13-001714)............................................................................ 16
4.7. DC/DC Converter, 24V in, 12V 8A out (13-003011) ...............................................................16
4.8. Bi-Directional Amplifier (17-017301) ....................................................................................... 17
4.9. 12V (Single) Relay Board (80-008901)...................................................................................18
4.10. 24V Switch-Mode PSU (96-300054).................................................................................... 18
5. INSTALLATION & COMMISIONING.........................................................................................19
5.1. Antenna Installation & Gain Calculations................................................................................ 19
5.2. Initial Installation Record......................................................................................................... 19
6. FAULT FINDING / MAINTENANCE.......................................................................................... 20
6.1. Tools & Test Equipment.......................................................................................................... 20
6.2. Basic Fault Finding .................................................................................................................20
6.3. Quick Fault Checklist .............................................................................................................. 21
6.4. Downlink ................................................................................................................................. 21
6.5. Uplink......................................................................................................................................21
6.6. Fault repair.............................................................................................................................. 21
6.7. Service Support ......................................................................................................................21
6.8. Care of Modules...................................................................................................................... 22
6.9. Module Removal (LNAs, general procedure):......................................................................... 22
6.10. Module Replacement (general): ..........................................................................................22
6.11. Power Amplifiers.................................................................................................................. 22
6.12. Low Power Amplifier Replacement......................................................................................23
6.13. Module Transportation:........................................................................................................ 23
APPENDIX A.......................................................................................................................................24
A.1. Glossary of Terms used in this document ...........................................................................24
A.2. Key to Drawing Symbols used in this document.................................................................. 25
A.3. EC Declaration of Conformity .............................................................................................. 26
A.4. Amendment List Record Sheet............................................................................................ 27
APPENDIX B.......................................................................................................................................28
Initial Equipment Set-Up Calculations...............................................................................................28
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1. INTRODUCTION
1.1. Scope and Purpose of Document
This handbook is for use solely with the equipment identified by the Aerial Facilities Limited (AFL) Part
Number shown on the front cover. It is not to be used with any other equipment unless specifically
authorised by AFL. This is a controlled release document and, as such, becomes a part of Aerial
Facilities’ Total Quality Management System. Alterations and modification may therefore only be
performed by AFL.
AFL 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 AFL, normally at the company’s repair facility in Chesham, England.
This handbook has been prepared in accordance with BS 4884, and AFL’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 AFL 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, AFL does not warrant the absolute accuracy of the information contained within this
manual, or its completeness, fitness for purpose, or scope.
AFL 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 AFL products carry a twelve month warranty from date of shipment. The warranty is expressly on a
return to base repair or exchange basis and the warranty cover does not extend to on-site repair or
complete unit exchange.
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2. SAFETY CONSIDERATIONS
2.1. Earthing of Equipment
Equipment supplied from the mains must be connected to grounded outlets and earthed
in conformity with appropriate local, national and international electricity supply and
safety regulations.
2.2. Electric Shock Hazard
The risk of electrical shocks due to faulty mains driven power supplies whilst
potentially ever present in any electrical equipment, would be minimised by adherence
to good installation practice and thorough testing at the following stages:
a) Original assembly.
b) Commissioning.
c) Regular intervals, thereafter.
All test equipment must be in good working order prior to its use. High current power supplies can be
dangerous because of the possibility of substantial arcing. Always switch off during disconnection and
reconnection.
2.3. RF Radiation Hazard
RF radiation, (especially at UHF frequencies) arising from transmitter outputs
connected to AFL’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
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 AFL 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.
all RF power sources have been
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2.5. Chemical Hazard
Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes
used in devices within equipment produced by Aerial Facilities 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 Aerial Facilities 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 AFL 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 AFL Quality Department can be contacted on:
Telephone +44 (0)1494 777000
Fax. +44 (0)1494 777002
e-mail
qa@aerialfacilities.com
UHF Bandselective BDA
90dB 40/5W
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3. EQUIPMENT OVERVIEW
The AFL UHF Bandselective, Bi-Directional Amplifier (BDA) (55-199102) is a 2-way on-band repeater.
The equipment is supplied in a four-point, wall-mounting, environmentally protected (IP65) aluminium
alloy lockable case. All RF ports and connectors are also IP65 standard making the entire enclosure
and connecting ports weatherproof. Handles are provided for carrying the unit and the door is fitted
with locks. A supply isolator switch is fitted inside the unit and there are D.C. and Alarm On indicators
on the outside of the door.
The UHF Bandselective, BDA (55-199102) is a 2-port device for direct connection to two antennas,
usually a highly directional Yagi or similar aligned towards the base (donor) site and an omnidirectional or leaky feeder antenna to cover the mobiles. The frequency bands that are passed by the
BDA are set as per the specific customer requirements.
Each active sub-module of the BDA carries its own volt-free, alarm relay contact interface which may
be easily integrated into any such summary system. In addition to this, over temperature and door
intrusion alarms are also fitted.
The Uplink signal enters at the ‘Mobile’ port, passes through a bandpass filter (02-010701) tuned to
the uplink band (415 - 418MHz) and then is amplified by the uplink path of Bi-Directional Amplifier
(17-017301) before passing through a second bandpass filter (02-010701)
The signal then passes through a second amplification stage (30dB gain 5Watt,), the signal then
passes through a third bandpass filter (02-010701) before exiting the unit at the ‘Base’ port
The Downlink signal enters at the ‘Base’ port and is passed through a bandpass filter (02-010701)
tuned to the downlink band (406 - 409MHz), the signal then passes through the downlink path of BiDirectional Amplifier (17-017301) and a second bandpass filter (02-010701) before being split into two
equal paths by 3dB Splitter/Combiner (05-002603). Each separate path is then passed through a
further amplification stage, each path pasing through a Linearised Power Amplifier (12-026901). After
exiting the amplifiers the two separate signals are recombined by a second 3dB Splitter/Combiner
(05-002603) before passing through a third bandpass filter (02-010701) and then exiting the unit at
the "mobile" port
The uplink and the downlink paths are fitted with signal attenuators providing an attenuation range of
0 to 30 dB per path, adjustable in 2dB steps. The attenuators themselves are integral to the sub
module Bi-Directional Amplifier (17-017301) and are controlled by toggle switches mounted inside the
case of the Bandselective, BDA (55-199102)
UHF Bandselective BDA
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Document Number 55-199102HBKM Issue No. 1 Page 6 of 28
3.1. UHF Bandselective, BDA (55-199102) List of major sub modules
Component
Part
02-010701 Bandpass FIlter 6
05-002603 3dB Splitter/Combiner 2
10-001725 Remote Attenuator Switch Assembly 2
12-021601 5 Watt Tetra Amplifier 1
12-026901 Linearised Power Amplifier 2
13-001714 Voltage Regulator 2
13-003011 DC/DC Converter 1
17-017301 Bi-Directional Amplifier 1
80-008901 12V (Single) Relay Board 1
96-300054 24V Switch-Mode PSU 1
Component Part Description Qty Per
Assembly
3.2. UHF Bandselective, BDA (55-199102) Specification.
Parameter Specification
Passband
Passband gain 90dB
Power Amplifier
Passband Ripple <±1.5 dB
I/P Return Loss > 14dB
1dB Compression
Noise Figure <4dB (max.gain)
In Band Spurious Noise
30kHz Bandwidth
Uplink ALC Setting 1dB below 1dB Comp.
Switched Attenuator (U/L & D/L) 2 dB steps 2-30dB (± 1dB)
Power Supply Current Rating 400W , 17A @ 24VD.C.
Alarm Output Type Local Alarms
AC Supply Voltage 110V AC
RF Connectors N type female
Temperature
range:
(excludes h/sinks handles etc.)
Uplink 415 - 418MHz
Downlink 406 - 409MHz
Uplink 5 Watt
Downlink 40 Watt
Uplink +35dB
Downlink +45dB
Uplink +48dBm OIP3
Downlink +62dBm
< -13 dBm
(at 90dB gain)
operation: -20°C to +60°C
storage: -40°C to +70°
Case Size
620x420x250 mm
UHF Bandselective BDA
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3.3. UHF Bandselective, BDA (55-199102) System Schematic
Drawing Number: 55-199182
UHF Bandselective BDA
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3.4. Photographs
3.4.1. Front of case – door closed
A Green LED “Power On”
B Red LED “Alarm”
UHF Bandselective BDA
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Document Number 55-199102HBKM Issue No. 1 Page 9 of 28
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