PBE Europe as Axell Wireless 50-1574SERIES UHF Hybrid Repeater, Model 50-157401 User Manual Q116431
Axell Wireless UHF Hybrid Repeater, Model 50-157401 Q116431
Manual
AXELL WIRELESS UK
Aerial House
Asheridge Road
Chesham, Buckinghamshire
HP5 2QD, United Kingdom
Tel: + 44 (0) 1494 777000
Fax: + 44 (0) 1494 777002
info@axellwireless.com
www.axellwireless.com AXELL WIRELESS SWEDEN
Box 7139
174 07 Sundbyberg
Sweden
Tel: + 46 (0) 8 475 4700
Fax: + 46 (0) 8 475 4799
15 Channel UHF Hybrid Select Repeater
User Handbook
For
DFAS Limestone - F67100
AWL Works Order Q116431
AWL Product Part No. 50-157401
AFL and Avitec have merged to form Axell Wireless
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 2 of 50
Table of Contents
1. INTRODUCTION.......................................................................................................................... 4
1.1. Scope and Purpose of Document............................................................................................ 4
1.2. Limitation of Liability Notice ..................................................................................................... 4
2. SAFETY CONSIDERATIONS...................................................................................................... 5
2.1. Earthing of Equipment ............................................................................................................. 5
2.2. Electric Shock Hazard ............................................................................................................. 5
2.3. RF Radiation Hazard ............................................................................................................... 5
2.4. Lifting and other Health and Safety Recommendations .......................................................... 5
2.5. Chemical Hazard ..................................................................................................................... 6
2.6. Laser safety ............................................................................................................................. 6
2.7. Emergency Contact Numbers .................................................................................................6
3. EQUIPMENT OVERVIEW ...........................................................................................................7
3.1. 15 Channel Repeater 50-157401 Rack layout ........................................................................8
3.2. 15 Channel Repeater 50-157401 Overall System Diagram .................................................... 9
3.3. 15 Channel Repeater 50-157401 Illustrations ....................................................................... 10
3.3.1. Front View ............................................................................................................................ 10
3.3.2. Rear View.........................................................................................................................11
3.4. 15 Channel Repeater 50-157401 Specification.....................................................................12
4 15 CHANNEL REPEATER 50-157401 MAJOR SUB-COMPONENTS...................................... 13
4.1. Downlink Splitter/Combiner 50-157402 ................................................................................. 14
4.1.1. Downlink Splitter/Combiner 50-157402 Illustrations......................................................... 15
4.1.1.1. System Diagram .......................................................................................................15
4.1.1.2. Front View .................................................................................................................... 16
4.1.1.3. Rear View .................................................................................................................17
4.1.2. Downlink Splitter/Combiner 50-157402 Major Sub-Components..................................... 18
4.2. Channel Module Shelf 50-157403 (6 channels) .................................................................... 19
4.2.1. Channel Module Shelf 50-157403 Illustrations................................................................. 20
4.2.1.1. Channel Module Shelf 50-157403 System Diagram ................................................ 20
4.2.1.2. Channel Module Shelf 1 (Channels 1 to 6) Front View ............................................ 21
4.2.1.3. Channel Module Shelf 2 (Channels 7 to 12) Front View .......................................... 22
4.2.1.4. Channel Module Shelves1 & 2 Rear View................................................................ 23
4.2.2. Channel Module Shelf 50-157403 Major Sub-Components............................................. 24
4.3. Channel Module Shelf 50-157404 (3 channels) .................................................................... 25
4.3.1. Channel Module Shelf 50-157404 Illustrations................................................................. 26
4.3.1.1. Channel Module Shelf 50-157404 System Diagram ................................................ 26
4.3.1.2. Channel Module Shelf 3 (Channels 13 to 16) Front View ........................................ 27
4.3.1.3. Channel Module Shelf 3 (Channels 13 to 16) Rear View ......................................... 28
4.3.2 Channel Module Shelf 50-157404 Major Sub-Components............................................. 29
4.4. 100W Power Amplifier 80-245103.........................................................................................30
4.4.1. 100W Power Amplifier 80-245103 Illustrations ................................................................31
4.4.1.1. 100W Power Amplifier 80-245103 System Diagram ................................................ 31
4.4.1.2. 100W Power Amplifier 80-245103 Front View.......................................................... 32
4.4.1.3. 100W Power Amplifier 80-245103 Rear View .......................................................... 32
4.4.1.4. Connections between 50-157402 and 80-245103.................................................... 33
4.4.2. 100W Power Amplifier 80-245103 Specification .............................................................. 34
4.4.3. 100W Power Amplifier 80-245103 Major Sub Components............................................. 34
4.5. Uplink Triplexer Shelves 50-157405...................................................................................... 35
4.5.1. Uplink Triplexer Shelves 50-157405 Illustrations ............................................................. 36
4.5.1.1. Uplink Triplexer Shelves 50-157405 System Diagram ............................................. 36
4.5.1.2. Uplink Triplexer Shelves 50-157405 Rear Views ..................................................... 37
4.5.2. Uplink Triplexer Shelves 50-157405 Major Sub Components.......................................... 37
4.7. Uplink 5W Amplifier Shelf 50-157406.................................................................................... 38
4.7.1. Uplink 5W Amplifier Shelves 50-157406 Illustrations.......................................................39
4.7.1.1. Uplink 5W Amplifier Shelves 50-157406 System Diagrams..................................... 39
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 3 of 50
4.7.1.2. Uplink 5W Amplifier Shelve 50-157406 Front View..................................................40
4.7.1.3. Uplink 5W Amplifier Shelve 50-157406 Rear View .................................................. 40
4.7.2. Uplink 5W Amplifier Shelf 50-157406 Specification ......................................................... 41
PARAMETER....................................................................................................................................... 41
SPECIFICATION ................................................................................................................................. 41
4.7.3. 5W Amplifier Shelf 50-157406 Major Sub Components................................................... 41
5. INSTALLATION.......................................................................................................................... 42
5.1 Initial Installation Record ....................................................................................................... 42
6. FAULT FINDING & MAINTENANCE ......................................................................................... 42
6.1 General Fault Finding Procedures......................................................................................... 42
6.2 Downlink ................................................................................................................................ 42
6.3 Uplink..................................................................................................................................... 43
6.4 Fault repair ............................................................................................................................43
6.5 Checking service ................................................................................................................... 43
6.6 Service Support ..................................................................................................................... 43
6.7 Tools & Test Equipment ........................................................................................................ 43
6.8 General Maintenance Procedures.........................................................................................44
6.9 Module Removal (LNAs, general procedure) ........................................................................ 44
6.10 Module Replacement (general) ............................................................................................. 44
6.11 Power Amplifiers.................................................................................................................... 44
6.12 Low Power Amplifier Replacement........................................................................................ 45
6.13 Module Transportation...........................................................................................................45
APPENDIX A ....................................................................................................................................... 46
A.1. Glossary of Terms used in this document ............................................................................. 46
A.2. Key to Drawing Symbols used in this document ................................................................... 47
A.3. EC Declaration of Conformity ................................................................................................ 48
A.4. Document Amendment Record ............................................................................................. 49
APPENDIX B ....................................................................................................................................... 50
B.1 Initial Equipment Set-Up Calculations ................................................................................... 50
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 4 of 50
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
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 5 of 50
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
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 6 of 50
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
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 7 of 50
3. Equipment Overview
15 Channel UHF Hybrid Select Repeater 50-157401
The repeater consists of 10 rack mount chassis housed in a 43U, 19” equipment mounting rack
Downlink signals are received from the RX antenna and passed into the Downlink Splitter/Combiner
shelf 50-157402. The signal is passes through a bandpass filter to remove out of band noise and then
passes through a low noise amplifier. The signal is then split into three separate paths, each path
then leaves the Splitter/Combiner shelf and passes into the channel module shelves, (Qty. 2, 6
channel shelves (50-157403) and a 3 channel shelf (50-157404) providing 15 channels) where the
channel modules ‘pick-out’ the required channels from within the frequency band, providing
selectivity, automatic gain levelling.
After leaving the channel modules the signals are re-combined and pass back into the
Splitter/Combiner where the signal passes through a 1W power amplifier. After the signal has been
amplified it again leaves the Splitter/Combiner shelf to pass through 100W Amplifier Shelf 80-245103
then returns to the Splitter/Combiner shelf to pass through a further bandpass filter before being
passed through a hybrid splitter/combiner (which separates the downlink from the uplink) and then the
signal exits the Splitter/Combiner shelf and is passed to the two LCX cables.
Uplink signals are received into Splitter/Combiner shelf 50-157402 from the LCX cables and pass
through the hybrid splitter/combiner before exiting the Splitter/Combiner shelf and entering the first of
the two Triplexer shelves 50-157405. This first Triplexer shelf splits the Uplink signal into three paths,
each path then passes through its own dedicated 5W Amplifier shelf 50-157406, each shelf provides
amplification and further bandpass filtering. After the three signals leave the 5W amplifier shelves they
enter the second Triplexer shelf where the three paths are combined to produce a single output which
is then passed to the TX Antenna.
The main RF connections to the rack are made to a patch-panel located on the lid of the rack
Downlink Splitter/Combiner shelf 50-157402 also contains two PSUs which are fed by a 110V AC
mains input, the AC connection is made via a terminal block mounted inside in the top of the rack.
The PSUs provides 2, 24V DC outputs to power the amplifier modules in 100W Amplifier Shelf 80-
245103 and 6, 12V DC outputs to power the Channel Module racks and the 5W Uplink Amplifier
Shelves.
All the Amplifier Shelves and the Channel Module shelves are equipped with alarm outputs which are
terminated at a Krone Block mounted inside at the top of the rack. There are two cable glands
mounted in the lid of the rack; one allows the AC mains cable to enter and the other allows the alarm
cable to exit.
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 8 of 50
3.1. 15 Channel Repeater 50-157401 Rack layout
Drawing Number 50-157451
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 9 of 50
3.2. 15 Channel Repeater 50-157401 Overall System Diagram
Drawing Number 50-157481
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 10 of 50
3.3. 15 Channel Repeater 50-157401 Illustrations
3.3.1. Front View
A Downlink 100W Amplifier 80-245103
B Downlink Splitter/Combiner 50-157402
C Channel Module Shelf 1 (channels 1 to 6) 50-157403
D Channel Module Shelf 2 (channels 7 to12) 50-157403
E Channel Module Shelf 3 (channels 13 to 15) 50-157404
F Uplink Splitting Triplexer 50-157405
G Uplink 5W Amplifier 1 ( 412.95 to 413.65MHz) 50-157406
H Uplink 5W Amplifier 2 ( 415.88 to 417.20MHz) 50-157406
I Uplink 5W Amplifier 3 ( 419.05 to 420.00MHz) 50-157406
J Uplink Combining Triplexer 50-157405
K 1U Blanking Panels
L Rack Door
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 11 of 50
3.3.2. Rear View
A Downlink 100W Amplifier 80-245103
B Downlink Splitter/Combiner 50-157402
C Channel Module Shelf 1 (channels 1 to 6) 50-157403
D Channel Module Shelf 2 (channels 7 to12) 50-157403
E Channel Module Shelf 3 (channels 13 to 15) 50-157404
F Uplink Splitting Triplexer 50-157405
G Uplink 5W Amplifier 1 ( 412.95 to 413.65MHz) 50-157406
H Uplink 5W Amplifier 2 ( 415.88 to 417.20MHz) 50-157406
I Uplink 5W Amplifier 3 ( 419.05 to 420.00MHz) 50-157406
J Uplink Combining Triplexer 50-157405
K AC Input terminal block
L Alarm Krone Block
M RF Connector Patch Panel
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 12 of 50
3.4. 15 Channel Repeater 50-157401 Specification
Parameter Specification
Downlink
Number of Channels 15
Channel 1 410.000 MHz
Channel 2 407.175 MHz
Channel 3 409.650 MHz
Channel 4 406.575 MHz
Channel 5 408.250 MHz
Channel 6 409.925 MHz
Channel 7 407.325 MHz
Channel 8 408.000 MHz
Channel 9 408.175 MHz
Channel 10 409.225 MHz
Channel 11 410.225 MHz
Channel 12 410.300 MHz
Channel 13 409.475 MHz
Channel 14 410.525 MHz
Channel 15 410.850 MHz
Channel Bandwidths 30kHz
Passband Gain >85 dB
Passband Ripple <±1.5dB
Gain Adjustment 0 to 30dB in 2dB steps
OIP3 +67dBm
Noise Figure <5dB (max.gain)
In Band Spurious Noise 30kHz Bandwidth < -13 dBm @ (85dB gain)
Uplink
Number of Channels 3
Channel 1 412.950 to 413.650MHz
Channel 2 415.880 to 417.200MHz
Channel 3 419.050 to 420.000MHz
Channel 1 700kHz
Channel 2 1.32MHz
Channel Bandwidths
Channel 3 950kHz
Passband Gain 85 dB Nominal
Passband Ripple <±1.5 dB
Gain Adjustment 0 to 30dB in 2dB steps
ALC +32.0dBm
OIP3 >+47dBm
Noise Figure <5dB (max.gain)
In Band Spurious Noise 30kHz Bandwidth < -13Bm @ (max gain)
General
Housing 43U 19” Rack (600Mmm x 600mm
AC Supply Voltage 110V
RF Connectors N type female
Alarms Fitted
(summary volt-free contacts)
Downlink Amplifiers Fail
Uplink Amplifiers Fail
AC Fail
Downlink Channel Alarms
Uplink Channel Alarms
operation -20°C to +60°C
Temperature Range storage -40°C to +70°
Humidity 95% RHNC
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 13 of 50
4 15 Channel Repeater 50-157401 Major Sub-Components
Section Component
Part
Component Part Description Qty Per
Assembly
4.1. 50-157402 Downlink Splitter/Combiner 1
4.2. 50-157403 Channel Module Shelf (6 channels) 2
4.3. 50-157404 Channel Module Shelf (3 channels) 1
4.4. 80-245103 100W Power Amplifier 1
4.5. 50-157405 Triplexer Shelf 2
4.7. 50-157406 5W Amplifier Shelf 3
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 14 of 50
4.1. Downlink Splitter/Combiner 50-157402
Downlink Splitter/Combiner 50-157402 is housed in an 8U rack mount chassis.
Downlink signals are received from the RX antenna via the port labelled “RX ANT” in the top of the
rack and are fed down to enter the Downlink Splitter/Combiner via the port labelled “RX ANT”
The downlink signal is first passed through a bandpass filter (02-011204) to reject out-of-band noise
and then a 30dB Low Noise Amplifier (11-007402). Next the signal; passes through a switched
attenuator (10-000701) which provides up to 30dB of signal attenuation in 2dB steps. The adjustment
switches for this attenuator are accessible on the back panel of the shelf. After leaving the attenuator
the signal is passed through a second Low Noise Amplifier (11-007302) this time providing 20dB of
signal gain.
After leaving the second Low Noise Amplifier the signal is split into three equal paths by a
Splitter/Combiner (05-003803) each of the three signal paths then leaves the Downlink
Splitter/Combiner for the Channel Module Shelves (50-157403 & 50-157404), via the SMA ports
labelled “A”, “B” and “C”.
Port A takes the signal to Channel Module Shelf 1 (50-157403) which houses the channel selectivity
modules for channels 1 to 6.
Port B takes the signal to Channel Module Shelf 2 (50-157403) which houses the channel selectivity
modules for channels 7 to 12.
Port C takes the signal to Channel Module Shelf 3 (50-157404) which houses the channel selectivity
modules for channels 13 to 15.
The signals from the Channel Module Shelves re-enter the Downlink Splitter/Combiner via the SMA
ports labelled “D”, “E” and “F”.
Port D is the input from Channel Module Shelf 1, channels 1 to 6.
Port E is the input from Channel Module Shelf 2, channels 7 to 12.
Port F is the input from Channel Module Shelf 3, channels 13 to 15.
After the three signal paths from the Channel Module Shelves re-enter the Downlink Splitter/Combiner
they are combined by a second Splitter/Combiner (05-003803), the combined signal then passes
through a second switched attenuator (10-000701); this attenuator is factory pre-set to its required
value, is not accessible and requires no adjustment. After leaving the attenuator the signal is passed
through a 1W Power Amplifier (12-021801) providing 15dB of gain.
The Downlink signal now exits the Downlink Splitter/Combiner shelf again via the SMA port labelled
“RF O/P” on the front panel, this output goes to the 100W Amplifier shelf (80-245103), after leaving
the 100W Amplifier shelf the signal re-enters the Downlink Splitter/Combiner shelf via the SMA port
labelled “RF I/P” on the front panel. The signal is then passed through a second bandpass filter (02-
011204) to further reject out-of-band noise and then the signal enters 4 Port Hybrid Coupler (05-
000101) where the signal is split into two paths, each path then leaves the Downlink Splitter/Combiner
shelf via the ports labelled “LCX 1” and “LCX 2” and are fed up to the ports in the top of the rack, also
labelled “LCX 1” and “LCX 2”, from here the connection is made to the LCX Cables.
The Uplink signals are received from the two LCX Cables at the ports labelled “LCX1” and “LCX2” in
the top of the rack and fed down to enter the Downlink Splitter/Combiner 50-157402 via the Ports
labelled “LCX 1” and “LCX 2”, the signal enters 4 Port Hybrid Coupler (05-000101) where the two
signal paths are combined into a into a single path which then leaves the Downlink Splitter/Combiner
for the first of the Uplink Triplexer Shelves 50-157405 via the port labelled “N”
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 15 of 50
4.1.1. Downlink Splitter/Combiner 50-157402 Illustrations
4.1.1.1. System Diagram
Drawing Number 50-157482
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 16 of 50
24V DC OUTPUT24V DC OUTPUT
POWER ALARM
FUSE 15A
FUSE 15A
ALARM PORT A
RF O/P
ALARM PORT B
RF I/P
A
B
C
D
E
F
G
H
I
J
4.1.1.2. Front View
A RF Output to Downlink 100W Amplifier 80-245103
B Alarm Input from Amplifier Module A in Downlink 100W Amplifier 80-245103
C 24V DC output to Amplifier Module A in Downlink 100W Amplifier 80-245103
D 15A Fuse for 24V DC output to Amplifier Module A
E RF Input from Downlink 100W Amplifier 80-245103
F Alarm Input from Amplifier Module B in Downlink 100W Amplifier 80-245103
G 24V DC output to Amplifier Module B in Downlink 100W Amplifier 80-245103
H 15A Fuse for 24V DC output to Amplifier Module B
I Green LED “Power On”
J Red LED “Alarm”
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 17 of 50
110V AC I/P AC TRIP
12V DC O/P 12V DC O/P
12V DC O/P 12V DC O/P
12V DC O/P 12V DC O/P
FUSE 6.3A FUSE 6.3A
FUSE 6.3A FUSE 6.3A
FUSE 6.3A FUSE 6.3A
ALARM
N
RX ANT
ALARM I/P ALARM I/P ALARM I/P
LCX 1 LCX 2
ABC
DEF
A
C
E
D
E
D
E
D
F
GHI
J
B
K
L
M
N
4.1.1.3. Rear View
A Port “N” output to Uplink Splitting Triplexer 50-157405
B Port “RX ANT” input from RX Antenna
C Alarm output to Krone Block
D 6.3 A fuse for 12V DC outputs
E 12V DC outputs
F 110V AC Input
G AC Trip Switch
H Alarm inputs from Channel Module Shelves 50-157403 & 50-157404
I Earth Connection
J Downlink Switched Attenuator 10-000701
K Inputs from Channel Module Shelves 50-157403 & 50-157404 **
L Outputs to Channel Module Shelves 50-157403 & 50-157404 **
M Connection to LCX 2
N Connection to LCX 1
**
Port “A” is output to Channel Module Shelf 50-157403 for Channels 1 to 6
Port “B” is output to Channel Module Shelf 50-157403 for Channels 7 to 12
Port “C” is output to Channel Module Shelf 50-157404 for Channels 13 to 15
Port “D” is input from Channel Module Shelf 50-157403 for Channels 1 to 6
Port “E” is input from Channel Module Shelf 50-157403 for Channels 7 to 12
Port “F” is input from Channel Module Shelf 50-157404 for Channels 13 to 15
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 18 of 50
4.1.2. Downlink Splitter/Combiner 50-157402 Major Sub-Components
Line
Item
Component
Part
Component Part Description Qty Per
Assembly
1 02-011204 Bandpass Filter 2
2 05-000101 4 Port Hybrid Coupler 1
3 05-003803 3 Way Splitter/Combiner 2
4 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 1
5 11-007302 Low Noise Amplifier 20dB 1
6 11-007402 Low Noise Amplifier 30dB 1
7 12-021801 1W Power Amplifier 1
8 13-003301 Mains Filter 1
12 20-001601 12V Relay Board 3
13 20-001602 24V Relay Board 1
18 80-008901 12V Relay Assembly 1
33 94-100004 Dual Diode Assembly 1
39 96-300057 PSU 400W 1
40 96-300067 PSU 600W 2
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 19 of 50
4.2. Channel Module Shelf 50-157403 (6 channels)
There are two, 6 channel, Channel Module Shelves in this system, one houses the Channel
Selectivity Modules that define the passbands for channels 1 to 6 and the other houses the Channel
Selectivity Modules that define the passbands for channels 7 to 12.
Each 6 channel shelf is housed in a 4U rack mount sub-rack assembly.
Downlink signals enter the Channel Module Shelves from the Downlink Splitter/Combiner shelf via the
SMA ports at the rear of the Channel Module Shelves. For the shelf that houses Channel Selectivity
Modules for channels 1 to 6 the input port is labelled “A”. On the shelf that houses Channel Selectivity
Modules for channels 7 to 13 the input port is labelled “B”
The following describes shelf 1, shelf 2 (except for the channel frequencies) is identical.
The downlink signal is split into two equal paths by 2 Way Splitter/Combiner 05-002603, each path is
then split into three equal paths by a pair of 3 Way Splitter/Combiners (05-003803), this provides six
signal paths. Each path is then fed to a Channel Selectivity Module (17-003047)
The channel modules are used to provide the required selectivity to define the operating passband;
they provide selectivity, automatic gain levelling and on frequency operation using phase-locked
tuning from a set of 16 DIP switches which digitally control the channel frequency. The DIP switches
are housed in an accompanying Channel Control Module 17-002101, one Control Module is provided
for each Selectivity Module.
After leaving the Channel Selectivity Modules each set of three paths is combined by a second set of
3 Way Splitter/Combiners (05-003803), the resultant two signal paths are further combined by another
2 Way Splitter/Combiner (05-002603) and the downlink signal then exits the Channel Module Shelf to
return to the Downlink Splitter/Combiner shelf via the SMA ports at the rear of the Channel Module
Shelves. For the shelf that houses Channel Selectivity Modules for channels 1 to 6 the output port is
labelled “D”. On the shelf that houses Channel Selectivity Modules for channels 7 to 13 the output
port is labelled “E”
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 20 of 50
4.2.1. Channel Module Shelf 50-157403 Illustrations
4.2.1.1. Channel Module Shelf 50-157403 System Diagram
Drawing Number 50-157483
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 21 of 50
4.2.1.2. Channel Module Shelf 1 (Channels 1 to 6) Front View
A Channel Selectivity Module 17-003047 (channel 1)
B Channel Selectivity Module 17-003047 (channel 2)
C Channel Selectivity Module 17-003047 (channel 3)
D Channel Selectivity Module 17-003047 (channel 4)
E Channel Selectivity Module 17-003047 (channel 5)
F Channel Selectivity Module 17-003047 (channel 6)
G Channel Control Module 17-002101 (channel 1)
H Channel Control Module 17-002101 (channel 2)
I Channel Control Module 17-002101 (channel 3)
J Channel Control Module 17-002101 (channel 4)
K Channel Control Module 17-002101 (channel 5)
L Channel Control Module 17-002101 (channel 6)
M Spare Channel Control Module
N 3 Way Splitter/Combiners 05-003803 (Splitting)
O 3 Way Splitter/Combiners 05-003803 (Combining)
Channel 1 410.000 MHz
Channel 2 407.175 MHz
Channel 3 409.650 MHz
Channel 4 406.575 MHz
Channel 5 408.250 MHz
Channel 6 409.925 MHz
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 22 of 50
4.2.1.3. Channel Module Shelf 2 (Channels 7 to 12) Front View
A Channel Selectivity Module 17-003047 (channel 7)
B Channel Selectivity Module 17-003047 (channel 8)
C Channel Selectivity Module 17-003047 (channel 9)
D Channel Selectivity Module 17-003047 (channel 10)
E Channel Selectivity Module 17-003047 (channel 11)
F Channel Selectivity Module 17-003047 (channel 12)
G Channel Control Module 17-002101 (channel 7)
H Channel Control Module 17-002101 (channel 8)
I Channel Control Module 17-002101 (channel 9)
J Channel Control Module 17-002101 (channel 10)
K Channel Control Module 17-002101 (channel 11)
L Channel Control Module 17-002101 (channel 12)
M Spare Channel Control Module
N 3 Way Splitter/Combiners 05-003803 (Splitting)
O 3 Way Splitter/Combiners 05-003803 (Combining)
Channel 7 407.325 MHz
Channel 8 408.000 MHz
Channel 9 408.175 MHz
Channel 10 409.225 MHz
Channel 11 410.225 MHz
Channel 12 410.300 MHz
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 23 of 50
4.2.1.4. Channel Module Shelves1 & 2 Rear View
A Channel Selectivity Module 17-003047 (channel 1)
B Channel Selectivity Module 17-003047 (channel 2)
C Channel Selectivity Module 17-003047 (channel 3)
D Channel Selectivity Module 17-003047 (channel 4)
E Channel Selectivity Module 17-003047 (channel 5)
F Channel Selectivity Module 17-003047 (channel 6)
G 2 Way Splitter/Combiner 05-002603 (Splitting)
H 2 Way Splitter/Combiner 05-002603 (Combining)
I RF Input (Port “A”) from Downlink Splitter/Combiner 50-157402 **
J RF Output (Port “D”)to Downlink Splitter/Combiner 50-157402 **
K 12V DC Input from Downlink Splitter/Combiner 50-157402
L 4A Fuse for 12V DC Input
Shelf 1
M Alarm output to Downlink Splitter/Combiner 50-157402
N Channel Selectivity Module 17-003047 (channel 7)
O Channel Selectivity Module 17-003047 (channel 8)
P Channel Selectivity Module 17-003047 (channel 9)
Q Channel Selectivity Module 17-003047 (channel 10)
R Channel Selectivity Module 17-003047 (channel 11)
S Channel Selectivity Module 17-003047 (channel 12)
T 2 Way Splitter/Combiner 05-002603 (Splitting)
U 2 Way Splitter/Combiner 05-002603 (Combining)
V RF Input (Port “B”) from Downlink Splitter/Combiner 50-157402 **
W RF Output (Port “E”) to Downlink Splitter/Combiner 50-157402 **
X 12V DC Input from Downlink Splitter/Combiner 50-157402
Y 4A Fuse for 12V DC Input
Shelf 2
Z Alarm output to Downlink Splitter/Combiner 50-157402
AA Position of Earth Connections
**
Port “A” is input from Splitter/Combiner 50-157402 for Channels 1 to 6
Port “D” is output to Splitter/Combiner 50-157402 for Channels 1 to 6
Port “B” is input from Splitter/Combiner 50-157402 for Channels 7 to 12
Port “E” is output to Splitter/Combiner 50-157402 for Channels 7 to 12
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 24 of 50
4.2.2. Channel Module Shelf 50-157403 Major Sub-Components
Line
Item
Component
Part
Component Part Description Qty Per
Assembly
1 05-002603 2 Way Splitter/Combiner 2
2 05-003803 3 Way Splitter/Combiner 4
3 17-002101 Channel Control Module (4 channels) 2
4 17-003047 Channel Selectivity Module 6
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 25 of 50
4.3. Channel Module Shelf 50-157404 (3 channels)
There is one, 3 channel, Channel Module Shelf in this system, it houses the Channel Selectivity
Modules that define the passbands for channels 13 to 15 and is housed in a 4U rack mount sub-rack
assembly.
Downlink signals enter the Channel Module Shelf from the Downlink Splitter/Combiner shelf via the
SMA port labelled “C” at the rear of the Channel Module Shelf.
The downlink signal passes through 2 Way Splitter/Combiner 05-002603 (this has one of its outputs
terminated with a 50 Load Termination (93-930003) providing scope for future expansion), the path
is then split into three equal paths by a 3 Way Splitter/Combiner (05-003803), each path is then fed to
a Channel Selectivity Module (17-003047)
The channel modules are used to provide the required selectivity to define the operating passband;
they provide selectivity, automatic gain levelling and on frequency operation using phase-locked
tuning from a set of 16 DIP switches which digitally control the channel frequency. The DIP switches
are housed in an accompanying Channel Control Module 17-002101, one Control Module is provided
for each Selectivity Module.
After leaving the Channel Selectivity Modules the three paths are combined by a second 3 Way
Splitter/Combiner (05-003803), the resultant signal path then passes through a second 2 Way
Splitter/Combiner 05-002603 (with one of its inputs terminated with a 50 Load Termination (93-
930003) providing scope for future expansion). The downlink signal then exits the Channel Module
Shelf to return to the Downlink Splitter/Combiner shelf via the SMA port labelled “E” at the rear of the
Channel Module Shelf
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 26 of 50
4.3.1. Channel Module Shelf 50-157404 Illustrations
4.3.1.1. Channel Module Shelf 50-157404 System Diagram
Drawing Number 50-157484
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 27 of 50
4.3.1.2. Channel Module Shelf 3 (Channels 13 to 16) Front View
A Channel Selectivity Module 17-003047 (channel 13)
B Channel Selectivity Module 17-003047 (channel 14)
C Channel Selectivity Module 17-003047 (channel 15)
D Channel Control Module 17-002101 (channel 13)
E Channel Control Module 17-002101 (channel 14)
F Channel Control Module 17-002101 (channel 15)
G Spare Channel Control Module
H 2 Way Splitter/Combiner 05-002603 (Splitting)
I 3 Way Splitter/Combiners 05-003803 (Splitting)
J 3 Way Splitter/Combiners 05-003803 (Combining)
K 2 Way Splitter/Combiner 05-002603 (Combining)
Channel 13 409.475 MHz
Channel 14 410.525 MHz
Channel 15 410.850 MHz
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 28 of 50
4.3.1.3. Channel Module Shelf 3 (Channels 13 to 16) Rear View
A Channel Selectivity Module 17-003047 (channel 13)
B Channel Selectivity Module 17-003047 (channel 14)
C Channel Selectivity Module 17-003047 (channel 15)
D 2 Way Splitter/Combiner 05-002603 (Splitting)
E 2 Way Splitter/Combiner 05-002603 (Combining)
F RF Input (Port “C”) from Downlink Splitter/Combiner 50-157402 **
G RF Output (Port “F”) to Downlink Splitter/Combiner 50-157402 **
H 12V DC Input from Downlink Splitter/Combiner 50-157402
I 4A Fuse for 12V DC Input
J Alarm output to Downlink Splitter/Combiner 50-157402
K Position of Earth Connections
**
Port “C” is input from Splitter/Combiner 50-157402 for Channels 13 to 15
Port “F” is output to Splitter/Combiner 50-157402 for Channels 13 to 15
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 29 of 50
4.3.2 Channel Module Shelf 50-157404 Major Sub-Components
Line
Item
Component
Part
Component Part Description Qty Per
Assembly
1 05-002603 2 Way Splitter/Combiner 2
2 05-003803 3 Way Splitter/Combiner 4
3 17-002101 Channel Control Module (4 channels) 1
4 17-003047 Channel Selectivity Module 3
5 93-930003 50 Load Termination 3
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 30 of 50
4.4. 100W Power Amplifier 80-245103
The 100W Power Amplifier shelf (80-245103) is a Class A 100W TETRA Linearised Class A amplifier
where 4, 25W linearised power amplifier modules (Pair “A” and Pair “B”) are combined together in a
parallel/phased configuration. Its housing is a 4U, 19” Rack mount tray with SMA connectors for the
RF input/output, 2 D-Type connectors for the alarm function and 2 DC connectors with fuse for the 24
DC supply. Its cooling is realized by fans mounted on the front panel.
It has a built in Current Fault Alarm Function with the four amplifiers in two summary alarm paths. The
summary alarm on D connector ‘A’ will show an alarm for the two amplifiers mounted on the top of the
shelf (Pair “A”) The summary alarm on D connector ‘B’ will show an alarm for the two amplifiers
mounted at the bottom of the shelf (Pair “B”).
The downlink signal is received from Downlink Splitter/Combiner 50-157402 via the SMA port on the
front panel labelled “RF INPUT” and the signal is split into two paths by a 3dB splitter/Combiner 05-
002603, one path is routed to Amplifier Pair A and the other is routed to Amplifier Pair B. Each signal
path is then further split by another pair of 3dB splitter/Combiners 05-002603 providing one path for
each of the four Amplifier Modules.
The four separate paths are then each passed through their respective Amplifier Modules 12-026901,
this configuration provides double redundancy, so should any of the 25W driver amps fail, coverage
would still continue, albeit with a slight loss in power.
After leaving the Amplifier Modules each pair of paths is then combined by a pair of 3dB
splitter/Combiners 05-002603 the resultant two paths are then combined by a further 3dB
splitter/Combiner 05-002603 and the combined signal then leaves the Amplifier Shelf to return to the
Downlink Splitter/Combiner 50-157402 via the SMA port on the front panel labelled “RF OUTPUT”
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 31 of 50
4.4.1. 100W Power Amplifier 80-245103 Illustrations
4.4.1.1. 100W Power Amplifier 80-245103 System Diagram
Drawing No. 80-245170
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 32 of 50
4.4.1.2. 100W Power Amplifier 80-245103 Front View
A Green LED “Power On” for Amplifier Modules Pair “A”
B Red LED “Alarm” for Amplifier Modules Pair “A”
C RF input from Downlink Splitter/Combiner 50-157402
D Alarm output from Amplifier pair “A”
E DC input to Amplifier pair “A”
F 15A fuse for DC Input to Amplifier pair “A”
G Earth Connection
H Cooling Fans
I Green LED “Power On” for Amplifier Modules Pair “B”
J Red LED “Alarm” for Amplifier Modules Pair “B”
K RF output to Downlink Splitter/Combiner 50-157402
L Alarm output from Amplifier pair “B”
M DC input to Amplifier pair “B”
N 15A fuse for DC Input to Amplifier pair “B”
4.4.1.3. 100W Power Amplifier 80-245103 Rear View
A Amplifier Modules Pair “A”
B Amplifier Modules Pair “B”
C Earth Connection to Rack
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 33 of 50
4.4.1.4. Connections between 50-157402 and 80-245103
A RF Output from 50-157402
B RF Input to 80-245103
C Alarm Output (Amplifier Module pair “A”) from 80-245103
D Alarm Input (Amplifier Module pair “A”) to 50-157402
E 24V DC output (Amplifier Module pair “A”) from 50-157402
F 24V DC Input (Amplifier Module pair “A”) to 80-245103
G RF Output from 80-245103
H RF Input to 50-157402
I Alarm Output (Amplifier Module pair “B”) from 80-245103
J Alarm Input (Amplifier Module pair “B”) to 50-157402
K 24V DC output (Amplifier Module pair “B”) from 50-157402
L 24V DC Input (Amplifier Module pair “B”) to 80-245103
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 34 of 50
4.4.2. 100W Power Amplifier 80-245103 Specification
PARAMETER SPECIFICATION
Frequency range 380-410MHz
Gain ≥ 36.0 dB
Gain Flatness 0.4 dB/10MHz
I/O Return loss >18dB
1dB compression point +50dBm
OIP3 +69dBm
Supply voltage 24V DC (x2)
Supply current 18-19Amps
Impedance 50
RF Connectors SMA
Environmental protection rating IP44
operational -10°C to +70°C Temperature
range storage -40°C to +80°C
Weight Approx 9kg
4.4.3. 100W Power Amplifier 80-245103 Major Sub Components
Line
Item No
Component
Part
Component Part Description Qty Per
Assembly
1 05-002603 3dB splitter/Combiner 6
2 12-026901 25W Linearised Power Amplifier 4
3 80-008902 24V Relay Assembly 2
4 96-400002 Cooling Fan 4
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 35 of 50
4.5. Uplink Triplexer Shelves 50-157405
There are two Triplexer Shelves in the system; both are in the Uplink path. Each Triplexer is housed
in a 4U, 19” Rack Mount Tray and they provide passband definition for the three uplink signal paths.
Triplexer 1 (the Uplink Splitting Triplexer) is positioned before the 5W Amplifier Shelves 50-157406
and serves to split the signal from the LCX Cables into three paths, one each for each of the 5W
Amplifier Shelves. Triplexer 2 (the Downlink Combining Triplexer) is positioned after the 5W Amplifier
Shelves 50-157406 and serves to combine the three signals from the 5W Amplifier Shelves into a
single path which is then passed to the TX Antenna.
The Uplink signal arrives at Triplexer 1 from the Downlink Splitter/Combiner 50-157402 via the port
labelled “N”, the signal is split by means of critical length harness into three paths and each path is
then fed through a bandpass filter (02-013401 and 02016801) which are tuned to the required
passband frequency and rejects out-of-band noise. The three passbands are:
Channel 1 412.950 to 413.650MHz
Channel 2 415.880 to 417.200MHz
Channel 3 419.050 to 420.000MHz
The Bandpass filters employed on Channels 1 and 3 are 02-013401, the bandpass filter on Channel 2
is 02-016801 as this a wider bandwidth.
After exiting the Bandpass Filters the three Uplink signal paths leave the Triplexer,
Channel 1 via the port labelled “G”
Channel 2 via the port labelled “H”
Channel 3 via the port labelled “J”
The three signal paths then go to their respective 5W Amplifier Shelves.
After leaving the 5W Amplifier Shelves the three uplink signal paths enter Triplexer 2
Channel 1 via the port labelled “K”
Channel 2 via the port labelled “L”
Channel 3 via the port labelled “M”
Each path is then fed through a bandpass filter (02-013401 and 02016801 in the same order as in
Triplexer 1) which are tuned to the required passband frequency and rejects out-of-band noise.
After passing through the Bandpass Filters the three signals are combined by means of critical length
harness into a single path which then exits the Triplexer via the port labelled “TX ANT” and is fed up
to the port in the top of the rack also labelled “TX ANT” where the connection is made to the TX
Antenna
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 36 of 50
4.5.1. Uplink Triplexer Shelves 50-157405 Illustrations
4.5.1.1. Uplink Triplexer Shelves 50-157405 System Diagram
Drawing Number 50-157485
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 37 of 50
GH
JN
MK
LTX ANT
Triplexer 1
Splitting Triplexer
Triplexer 2
Combining Triplexer
A
B C D
H
E F G
I
J
4.5.1.2. Uplink Triplexer Shelves 50-157405 Rear Views
A Port “N” Input from Downlink Splitter/Combiner 50-157402
B Port “G” output to 5W Amplifier 50-157406 for Channel 1
C Port “H” output to 5W Amplifier 50-157406 for Channel 2
D Port “J” output to 5W Amplifier 50-157406 for Channel 3
E Port “M” Input from 5W Amplifier 50-157406 for Channel 3
F Port “K” Input from 5W Amplifier 50-157406 for Channel 1
G Port “L” Input from 5W Amplifier 50-157406 for Channel 2
H Port “H” Output to TX Antenna
I Earth Connection Triplexer 1
J Earth Connection Triplexer 2
4.5.2. Uplink Triplexer Shelves 50-157405 Major Sub Components
Line
Item No
Component
Part
Component Part Description Qty Per
Assembly
1 02-013401 Bandpass Filter 2
2 02-016801 Bandpass Filter 1
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 38 of 50
4.7. Uplink 5W Amplifier Shelf 50-157406
There are three 5W Amplifier Shelves in this system (one for each of the three Uplink Channels.);
each Amplifier is housed in a 3U, 19” Rack Mount Tray.
The three channels are as follows
Channel 1 is 412.950 to 413.650MHz
Channel 2 is 415.880 to 417.200MHz
Channel 3 is 419.050 to 420.000MHz
The uplink signal enters the 5W Amplifier shelf from the Splitting Duplexer 50-157405 via the
uppermost “N” type port on the back and then passes through the first of three amplification stages;
the first amplification stage is provided by a Low Noise Amplifier (11-007402) which provides 30dB of
gain.
After the first stage of amplification the signal then passes through a Switched Attenuator (10-000701)
which provides up to 20dB of signal attenuation in 2dB steps; the setting switches for this Attenuator
are accessed on the back panel of the shelf.
After leaving the Attenuator the signal then passes into the second stage of Amplification, this is
provided by a second Low Noise Amplifier (11-007402) providing a further 30dB of gain. The signal
then passes through a Bandpass Filter (02-007309) which is tuned to the required passband
frequency and rejects out-of-band noise.
After the Bandpass Filter the signal enters the third stage of Amplification which is provided by a 5W
Power Amplifier (12-021601). The second and third stages of amplification are straddled by an
Automatic Gain Control assembly (17-019802 and 17-016401) which provides further signal
attenuation if needed. The signal then exits the 5W Amplifier shelf to go to the Combining Duplexer
50-157405 via the lowermost “N” type port on the back.
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 39 of 50
4.7.1. Uplink 5W Amplifier Shelves 50-157406 Illustrations
4.7.1.1. Uplink 5W Amplifier Shelves 50-157406 System Diagrams
Drawing Number 50-157486
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 40 of 50
4.7.1.2. Uplink 5W Amplifier Shelve 50-157406 Front View
A Green LED “Power On”
B Red LED “Alarm”
4.7.1.3. Uplink 5W Amplifier Shelve 50-157406 Rear View
A RF Input** from Triplexer 1
B RF Output** to Triplexer 2
C Earth Connection
D Attenuator Controls
E Alarm Output to Krone Block
R 4A Fuse for DC Input
G 12V DC Input from Downlink Splitter/Combiner 50-157402
**On the 5W Amplifier shelf for Uplink Channel 1 (412.950 to 413.650MHz) the Input Port is labelled
“G” and the Output Port is labelled “K”
**On the 5W Amplifier shelf for Uplink Channel 2 (415.880 to 417.200MHz) the Input Port is labelled
“H” and the Output Port is labelled “L”
**On the 5W Amplifier shelf for Uplink Channel 3 (419.050 to 420.000MHz) the Input Port is labelled
“J” and the Output Port is labelled “M”
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 41 of 50
4.7.2. Uplink 5W Amplifier Shelf 50-157406 Specification
PARAMETER SPECIFICATION
Channel 1 412.95 to 413.65MHz
Channel 2 415.880 to 417.200MHz
Passband
Channel 3 419.050 to 420.000MHz
Channel 1 700kHz
Channel 2 1.32MHz
Passband
bandwidth Channel 3 950kHz
Maximum Gain > 85dB
Passband ripple < +/-1.5dB
Maximum output power (ALC) +36dBm
In 3MHz Band Spurious Noise
30kHz Bandwidth < -36dBm at Max gain
3rd Order Intercept Point +50dBm
Switched attenuator 0 - 30dB in 2dB steps
Supply voltage 12V DC
Supply current 2.9 Amps
Impedance 50
RF Connectors N
Environmental protection rating IP44
operational -10°C to +70°C Temperature
range storage -40°C to +80°C
Weight Approx 4kg
4.7.3. 5W Amplifier Shelf 50-157406 Major Sub Components
Line
Item No
Component
Part
Component Part Description Qty Per
Assembly
1 02-007309 Bandpass Filter 1
2 10-000701 Switched Attenuator 0.25Watt, 0 - 30dB 1
3 11-007402 Low Noise Amplifier 2
4 12-021601 5W Power Amplifier 1
6 17-016401 AGC Attenuator 1
7 17-019801 AGC Detector 1
9 80-008901 12V Relay Assembly 1
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 42 of 50
5. INSTALLATION
5.1 Initial 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 should these figures be
needed for future reference or diagnosis.
6. Fault Finding & MAINTENANCE
6.1 General Fault Finding Procedures
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.
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 CEMS, the RS232 Coverage Enhancement Management System,
if fitted), or locally with the front panel LEDs. The green LED on the front panel should be illuminated,
while the red alarm indicator should be off.
If an alarm is on, then that individual shelf/module must be isolated and individually tested against the
original test specification.
The individual amplifier units have a green LED showing through a hole in their case, 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.
6.2 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 master site BTS input and check for output at the remote site
feeder output.
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.
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 43 of 50
6.3 Uplink
Testing the uplink involves a similar procedure to the downlink except that the frequencies used are
those transmitted by the mobile equipment.
6.4 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
AWL for repair.
6.5 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.
6.6 Service Support
Advice and assistance with maintaining and servicing this system are available by contacting Axell
Wireless Ltd.
6.7 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.
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 44 of 50
6.8 General Maintenance Procedures
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.
6.9 Module Removal (LNAs, general procedure)
The following general rules 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).
6.10 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.
6.11 Power Amplifiers
1) Remove power to the unit. (Switch off at the mains/battery, or remove DC in connector)
2) Remove alarm wires from alarm screw terminal block or disconnect multi-way alarm
connector.
3) Carefully disconnect the RF input and output coaxial connectors (usually SMA)
4) 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.
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 45 of 50
6.12 Low Power Amplifier Replacement
Disconnect the mains power supply and disconnect the 24V dc supply connector for the LPA.
Disconnect the RF input and output cables from the LPA.
Disconnect the alarm connector.
Remove the alarm monitoring wires from (D type connector) pins 9 and 10.
Remove the LPA module by removing the four retaining screws, replace with a new LPA module and
secure it with the screws.
Connect the RF cables to the LPA input and output connectors. Reconnect the wires to the alarm
board connector pins 9 and 10.
Reconnect the DC supply connector and turn the mains switch on.
Note: Tighten SMA connectors using only a dedicated SMA torque spanner. If SMA connectors are
over-tightened, irreparable damage will occur. Do not use adjustable pliers to loosen/tighten SMA
connectors.
Also take care not to drop or knock the module as this can damage (or misalign in the case of tuned
passive modules) sensitive internal components. Always store the modules in an environmentally
friendly location
6.13 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 AWL for investigation/repair must be so
protected. Please contact AWL’s quality department before returning a module.
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 46 of 50
Appendix A
A.1. Glossary of Terms used in this document
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.
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
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 47 of 50
C0-AX CABLE
C0-AX CABLE
CAT 5 CABLE
CABLES
24/FIBRE OPTIC CABLE/LINK
CABLE 1/2"
RADIATING CABLE
TAPPER/COUPLER
STATION
BASE TRANSCEIVER
MISC
HUBS
FIBRE MAIN HUB
EXPANSION HUB
BI-DIRECTIONAL AMPLIFIER
E
BTS
FMH
EH
7/8" DIA
1/2" DIA
6dB DIRECTIONAL COUPLER
10dB COUPLER
C10
CROSS BAND COUPLER
COUPLERS
J JUMPER
C6
C10 10dB DIRECTIONAL COUPLER
6 dB DIRECTIONAL COUPLER
DIRECTIONAL COUPLER
PANEL ANTENNA
(MOUNTED AT HIGH LEVEL)
DIRECTIONAL ANTENNA
FLAT PLATE ANTENNA
YAGI ANTENNA
ANTENNAS
REMOTE ANTENNA UNIT
OMNI ANTENNA
SPLITTERS
ANTENNA
RAU
BAND PASS FILTER
CAVITY RESONATOR
NOTCH FILTER
ISOLATOR
HYBRID COMBINER
EARTH STUD
LEEKY FEEDER
Outputs to receivers
R.S.A
AMPLIFIER
MISC
dB ATTENUATOR (VARIABLE)
A.G.C
AGC dB
CONTROLLER
MONITORING
MODEM
MONITORING CONTROLLER
MODEM
(CELL ENHANCER)
FREQUENCY PROGRAMMING
DATA
B/W=30 to 200kHz
CHANNEL MODULE
FIBRE-OPTIC
MODULATOR
FIBRE-OPTIC
DEMODULATOR
LOCAL OSCILLATOR
(up to
16 way)
Outputs
DUMMY LOAD
LOCAL OSCILLATOR
SPLITTER
MISC
8/FIBRE OPTIC CABLE/LINK
STANDARD FOR
LEVEL (dBm)
-73 = BELOW ACCEPTABLE
SIGNAL LEVEL(dBm)
ALL AIRPORTS
BCCH (BROADCAST
IDENTITY CODE)
BSIC (BASIC SITE
LEVEL (dBm)
-83 = BELOW ACCEPTABLE
SIGNAL LEVEL(dBm)
-82 = ACCEPTABLE SIGNAL
-72 = ACCEPTABLE SIGNAL
CONTROL CHANNEL)
= READING POSITION
22 =
602 =
SIGNAL KEY
STANDARD EXCEPT
FOR AIRPORTS
(SEE BELOW)
BLADE ANTENNA
ATTENUATOR (FIXED)
dB
OUTIN
COUPLED
HI COM
LOW
HYBRID SPLITTER
IN
IN
OUT
OUT
IN
OUT
BYDATEDESCRIPTIONNo
THIRD ANGLE PROJECTION
123456789
A
B
C
D
E
F
123
456789
A
B
C
D
E
Fax : 01494 777002
Tel : 01494 777000
Aerial Facilities Limited
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
CHKD
DRAWN
APPD
DATE
TOLERANCES SCALE
England
90-000001
AA
NTS
PL 10/05/00
ORIGINAL
ISSUE
PL
23/05/00
21/06/00 PLBLADE ANTENNA ADDED1A
2A ECN3165
RF
RF
PLUG & SOCKET
FIBRE OPTIC
CONNECTOR
FC/APC
SOCKET
PLUG
MISC
DC
DC
AC TO DC PSU
DC TO DC
CONVERTER
FUSE
RELAY
N.O. (CLEAR CONTACT)
N.C. (FILLED CONTACT)
COM
MB GD
26/01/04 PL
2B TEXT CORRECTION 28/07/04 PL
ISSUE
F
CUSTOMER DRAWING.No
TITLE
3
A
AFL - STANDARD SYMBOLS
A.2. Key to Drawing Symbols used in this document
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 48 of 50
A.3. EC Declaration of Conformity
In accordance with BS EN ISO/IEC 17050-1&-2:2004
Axell Wireless Limited
Aerial House
Asheridge Road
Chesham
Buckinghamshire HP5 2QD
United Kingdom
DECLARES, UNDER OUR SOLE RESPONSIBILITY THAT THE FOLLOWING PRODUCT:
PRODUCT PART NO[S] 50-157401
PRODUCT DESCRIPTION 15 Channel UHF Hybrid Select Repeater
IN ACCORDANCE WITH THE FOLLOWING DIRECTIVES:
1999/5/EC The Radio & Telecommunications Terminal Equipment Directive Annex V
and its amending directives
HAS BEEN DESIGNED AND MANUFACTURED TO THE FOLLOWING STANDARD[S] OR
OTHER NORMATIVE DOCUMENT[S]:
BS EN 60950 Information technology equipment.
Safety. General requirements
ETS EN 301 489-1 EMC standard for radio equipment and services.
Part 1. Common technical requirements
I hereby declare that the equipment named above has been designed to comply with the relevant
sections of the above referenced specifications. The unit complies with all essential requirements
of the Directives.
SIGNED
B. S. Barton
Operations Director DATE: 17/01/2008
Registered Office: Aerial House, Asheridge Road, Chesham, Buckinghamshire, HP5 2QD England Registered No. 4042808 (England)
www.axellwireless.com
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 49 of 50
A.4. Document Amendment Record
Issue
No.
Date Incorporated
by
Section
Amended
Reason for new issue
A 05/03/2008 AJS Draft
1 26/03/2008 AJS First Issue
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 50 of 50
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 dBm
F – Antenna Isolation dB
G – Input signal level from donor BTS dBm
Operating Voltage V
Downlink Calculations
Parameter Comments Value
Input signal level (G) dBm
CE max. o/p power (E) dBm
Gain setting E - G dB
Isolation required (Gain + 10dB) dB
Service antenna gain (A) dB
Service antenna feeder loss (C) dB
Effective radiated power (ERP) E+A-C dBm
Attenuator setting CE gain-gain setting dB
If the input signal level in the uplink path is known and steady, use the following calculation table to
determine the gain setting. If the CE features Automatic Gain Control the attenuator should be set to
zero and if not, then the attenuation setting for both uplink and downlink should be similar.
Uplink Calculations
Parameter Comments Value
Input signal level dBm
CE max. o/p power (E) dBm
Gain setting dB
Required isolation dB
Donor antenna gain (B) dB
Donor antenna feeder loss (D) dB
Effective radiated power (ERP) E+B-D dBm
Attenuator setting (CE gain-gain setting) dB