Axell Wireless 55 1248SERIES User Manual
Tetrapol Band Selective Repeater
User Handbook
For
Coverage Solutions Corporation
AFL Works Order Nō.:Q110695
AFL product part Nō.:55-124801
Tetrapol Band Selective Repeater
Handbook Nō.-55-124801HBKM Issue No:-1
User Handbook
Date:-22/01/2004
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Table of Contents
AMENDMENT LIST RECORD SHEET....................................................................................................4
INTRODUCTION.........................................................................................................................................5
Scope ........................................................................................................................................................................... 5
Purpose ....................................................................................................................................................................... 5
Glossary of Terms...................................................................................................................................................... 6
Key to AFL RF Module Drawing Symbols ............................................................................................................. 7
1. SAFETY CONSIDERATIONS.........................................................................................................8
1.1 RF Radiation Hazard................................................................................................................................... 8
1.2 Chemical Hazard.......................................................................................................................................... 9
1.3 Emergency Contact Numbers...................................................................................................................... 9
2. OVERVIEW/SYSTEM DESCRIPTION .......................................................................................10
3. SPECIFICATION............................................................................................................................11
3.1 Parts Lists.................................................................................................................................................... 11
3.2 Technical Specification............................................................................................................................... 12
3.3 Mechanical Specification............................................................................................................................ 13
4. SYSTEM DRAWINGS ....................................................................................................................14
4.1 System Diagram.......................................................................................................................................... 14
4.2 Generic Wall-Mount Case Outline Drawing............................................................................................ 15
5. SUB-UNIT MODULES....................................................................................................................16
5.1 Bandpass Filters & Duplexer (02-007306 & 16-041401)......................................................................... 16
5.1.1 Description ............................................................................................................................................... 16
5.1.2 Technical Specification (02-007306)........................................................................................................ 16
5.1.3 Technical Specification (16-041401)........................................................................................................ 16
5.2 ¼Watt 0- -30dB Switched Attenuator (10-000701)..................................................................................17
5.2.1 General Application ................................................................................................................................. 17
5.2.2 Switched Attenuators ................................................................................................................................ 17
5.3 Low Noise Amplifiers (11-007302 & 11-007402)...................................................................................... 17
5.3.1 Description ............................................................................................................................................... 17
5.3.2 Technical Specification, 11-007302 ......................................................................................................... 17
5.3.3 Technical Specification, 11-007402 ......................................................................................................... 18
5.4 1Watt Low Power Amplifier (11-007901)................................................................................................. 18
5.4.1 Description ............................................................................................................................................... 18
5.4.2 Technical Specifications ........................................................................................................................... 18
5.5 10W Power Amplifier (12-016302)............................................................................................................ 19
5.5.1 Description ............................................................................................................................................... 19
5.5.2 Technical Specification............................................................................................................................. 19
5.6 Dual DC/DC Converter (13-001803)......................................................................................................... 20
5.6.1 Description ............................................................................................................................................... 20
5.6.2 Technical Specification............................................................................................................................. 20
5.7 Automatic Gain Control (17-001101, det. & 17-001201, atten.)............................................................. 21
5.7.1 Description ............................................................................................................................................... 21
5.7.2 Technical Specification............................................................................................................................. 22
5.8 24V Single Relay Board (80-008902) ........................................................................................................ 22
5.8.1 Description ............................................................................................................................................... 22
5.9 Generic Amplifier Alarm Wiring Sketch ................................................................................................. 23
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6. INSTALLATION .............................................................................................................................24
6.1 Initial Installation Record.......................................................................................................................... 24
6.2 Antenna Installation & Gain Calculations............................................................................................... 24
6.3 Antenna Isolation........................................................................................................................................ 25
6.4 Wall Mount Installations ........................................................................................................................... 26
7. MAINTENANCE .............................................................................................................................27
7.1 General Procedures.................................................................................................................................... 27
7.1.1 Fault Finding............................................................................................................................................ 27
7.1.2 Downlink................................................................................................................................................... 28
7.1.3 Uplink ....................................................................................................................................................... 28
7.1.4 Fault repair............................................................................................................................................... 28
7.1.5 Checking service....................................................................................................................................... 29
7.1.6 Service Support......................................................................................................................................... 29
7.2 Tools & Test Equipment............................................................................................................................ 29
7.3 Care of Modules.......................................................................................................................................... 30
7.3.1 General Comments ................................................................................................................................... 30
7.3.2 Module Removal (LNA’s, general procedure): ........................................................................................ 30
7.3.3 Module Replacement (general): ............................................................................................................... 30
7.3.4 Power Amplifiers ...................................................................................................................................... 30
7.3.5 Low Power Amplifier Replacement .......................................................................................................... 31
7.3.6 Module Transportation: ........................................................................................................................... 31
APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS.................................................32
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Date:-22/01/2004
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AMENDMENT LIST RECORD SHEET
Issue
Nō.
Date Incorporated
by
Page No.’s
Amended
Reason for new issue
1 23/01/2004 CMH 1st Issue
Document Ref:-55-124801HBKM
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Handbook Nō.-55-124801HBKM Issue No:-1
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INTRODUCTION
Scope
This handbook is for use solely with the equipment identified by the AFL Part Number
shown on the front cover. It is not to be used with any other equipment unless specifically
authorised by Aerial Facilities Limited.
Purpose
AFL recommends that the installer of this equipment familiarise his/herself 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 ISO 9001: 1994 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.
Limitation of Information 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 it’s 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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Glossary
of Terms
Repeater or
Cell Enhancer A Radio Frequency (RF) amplifier which can simultaneously
amplify and re-broadcast Mobile Station (MS) and Base
Transceiver Station (BTS) signals.
Band Selective Repeater A Cell Enhancer designed for operation on a range of channels
within a specified frequency band.
Channel Selective
Repeater A Cell Enhancer, designed for operation on specified channel(s)
within a specified frequency band. Channel frequencies may be
factory set or on-site programmable.
BTS Base Transceiver Station
C/NR Carrier-to-Noise Ratio
Downlink (D.L.) RF signals transmitted from the BTS and to the MS
Uplink (U.L.) RF signals transmitted from the MS to the BTS
EMC Electromagnetic Compatibility
GND Ground
DC Direct Current
AC Alternating Current
ID Identification Number
OIP3 Output Third Order Intercept Point = RF
+(C/I)/2
out
LED Light Emitting Diode
M.S. Mobile Station
N/A Not Applicable
N/C No Connection
NF Noise Figure
RF Radio Frequency
Rx Receiver
Tx Transmitter
S/N Serial Number
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to AFL RF Module Drawing Symbols
Key
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1. SAFETY CONSIDERATIONS
RF Radiation Hazard
1.1
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 unterminated. 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 50Ω, and that of free space at 377Ω, 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.
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Chemical Hazard
1.2
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.
Emergency Contact Numbers
1.3
The AFL Quality Department can be contacted on:
Telephone +44 (0)1494 777000
Fax +44 (0)1494 777002
e-mail qa@aerial.co.uk
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2. OVERVIEW/SYSTEM DESCRIPTION
The AFL Band Selective Cell Enhancer is a 2-way on-band repeater. Various models are
available to cover frequency bands from 50MHz to 3000MHz with power levels up to
100Watts. Its main sphere of applications is in urban areas where the topology is such that
shadows occur in the propagation pattern (for example within large buildings, conference
centres and tunnels, etc.)
The Band Selective Cell Enhancer 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
omni-directional or leaky feeder antenna to cover the mobiles. The frequency bands that
are passed by the Cell Enhancer are set as per the specific customer requirements.
AFL manufacture a wide range of Cell Enhancers, configured for each customer's specific
requirements. Two basic physical variants are available, a rack mounted version to fit in a
standard 19" rack and an environmentally sealed wall mounted version which requires no
further enclosure.
This system consists of a bi-directional band selective, cell enhancer operating in the
390MHz band. It is housed in a wall-mounted environmentally protected (IP65) case
powered from an externally supplied 24Volt DC source. Alarms are provided for each
amplifier as a summary, volt-free relay contact pair for easy integration into an existing
alarm system. A supply isolator switch is fitted inside the unit and there are D.C. and
Alarm on indicators on the outside of the door.
An automatic gain control system is employed in the uplink path in an attempt to negate
the overloading effect from mobiles operated close the antenna.
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