Axell Wireless 50 1876SERIES User Manual
Aerial Facilities Limited
Two Channel UHF Repeater
For
Inner Wireless Inc.
AFL Works Order: Q115559
AFL product part #: 50-187601
Aerial Facilities Limited
2 Channel UHF Cell Enhancer Handbook
Technical Literature
Handbook Number: 50-187601HBKM Issue No. A Date 22/05/2007 Page 1 of 51
Table of Contents
1. INTRODUCTION ............................................................................................................4
Scope and Purpose of Document....................................................................................................4
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 Chemical Hazard ..................................................................................................................6
2.5 Laser Safety..........................................................................................................................6
2.6 Emergency Contact Numbers.............................................................................................6
3. EQUIPMENT OVERVIEW ..............................................................................................7
3.P Photographs.........................................................................................................................7
3.1 Description..........................................................................................................................10
3.2 Technical Specification .....................................................................................................10
3.3 Mechanical Specification...................................................................................................11
3.4 Parts List.............................................................................................................................12
3.5 System Diagram.................................................................................................................13
4. SUB-UNIT MODULES..................................................................................................14
4.1 Bandpass Filter (02-010201)..............................................................................................14
4.1.1 Description .......................................................................................................................................14
4.1.2 Technical Specification ....................................................................................................................14
4.2 Two-Way Splitter (07-002503)............................................................................................15
4.2.1 Description .......................................................................................................................................15
4.2.2 Technical Specification ....................................................................................................................15
4.2.3 Drg. # 07-002501, 2 Way Splitter Assembly Drawing .....................................................................16
4.3 0.25Watt 0- -30dB Switched Attenuator (10-000703).......................................................17
4.3.1 General Application..........................................................................................................................17
4.3.2 Switched Attenuators .......................................................................................................................17
4.3.3 Switched Attenuator Assembly Drawing, Drg. # 10-000703 ...........................................................18
4.3.4 0-30dB Attenuator Circuit Diagram, Drg. # 10-000770 ...................................................................19
4.4 11-007302 & 11-007402 Low Noise Amplifiers.................................................................20
4.4.1 Description .......................................................................................................................................20
4.4.2 Technical Specification (11-007302) ...............................................................................................20
4.4.3 Technical Specification (11-007402) ...............................................................................................20
4.4.4 LNA ‘D’ Connector Pin-out details ...................................................................................................21
4.4.5 Drg. # 11-007302, LNA Assembly With Alarm Relay ......................................................................22
4.4.6 Drg. # 11-007370, LNA RF Circuit Diagram ....................................................................................23
4.4.7 Drg. # 11-007371, LNA DC Wiring Diagram....................................................................................24
4.4.8 Drg. # 11-003971, LNA DC Circuit Diagram....................................................................................25
4.4.9 Drg. # 11-007402, LNA Assembly With Alarm Relay ......................................................................26
4.4.10 Drg. # 11-007470, LNA RF Circuit Diagram ....................................................................................27
4.5 12-021601 5Watt Medium Power Tetra Amplifier.............................................................28
4.5.1 Description .......................................................................................................................................28
4.5.2 Technical Specification ....................................................................................................................28
4.5.3 PA 7-Way Connector Pin-outs.........................................................................................................28
4.5.4 PA Connector Pin-Outs ...................................................................................................................28
4.5.5 5W TETRA PA Assembly Drawing, Drg. # 12-021601....................................................................29
4.5.6 5W TETRA PA Circuit Diagram, Drg. # 12-021670.........................................................................30
4.6 12-022101 10Watt Power Tetra Amplifier......................................................................... 31
4.6.1 Description .......................................................................................................................................31
4.6.2 Technical Specification ....................................................................................................................31
4.6.3 PA 7-Way Connector Pin-Outs ........................................................................................................32
4.6.4 PA Connector Pictorial Pin-Outs......................................................................................................32
4.6.5 10Watt PA Assembly Drawing, Drg. # 12-022101...........................................................................33
4.6.6 10Watt PA Circuit Diagram, Drg. # 12-022171................................................................................34
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4.7
8A Mains Filter Assembly (13-003301)............................................................................. 35
4.7.1 Description .......................................................................................................................................35
4.7.2 Technical Specification ....................................................................................................................35
4.8 Channel Control Module (17-002101)............................................................................... 36
4.8.1 Description .......................................................................................................................................36
4.8.2 Technical Specification ....................................................................................................................36
4.8.3 VHF/ UHF Programming Procedure................................................................................................36
4.8.4 VHF/ UHF Programming Example...................................................................................................37
4.9 Channel Selective Module (17-003007) ............................................................................38
4.9.1 Description .......................................................................................................................................38
4.9.2 Generic Channel Module Block Diagram, Drg. # 17-003080 ..........................................................39
4.10 12V Single Relay Board (80-008901).................................................................................40
4.10.1 Description .......................................................................................................................................40
4.10.2 Technical Specification ....................................................................................................................40
4.10.3 12 or 24V Relay PCB Pin-Outs, Drg. # 80-008970 .........................................................................41
4.11 12V Switch-Mode PSU (96-300052)...................................................................................42
4.11.1 Description .......................................................................................................................................42
4.11.2 Technical Specification ....................................................................................................................42
5. INSTALLATION............................................................................................................43
5.1 Initial Installation Record...................................................................................................43
6. FAULT FINDING & MAINTENANCE ...........................................................................43
6.1 General Fault Finding Procedures....................................................................................43
6.2 Downlink .............................................................................................................................44
6.3 Uplink ..................................................................................................................................44
6.4 Fault repair..........................................................................................................................44
6.5 Checking service................................................................................................................45
6.6 Service Support..................................................................................................................45
6.7 Tools & Test Equipment....................................................................................................45
6.8 General Maintenance Procedures ....................................................................................46
6.9 Module Removal (LNA’s, general procedure)..................................................................46
6.10 Module Replacement (general) .........................................................................................46
6.11 Power Amplifiers................................................................................................................46
6.12 Low Power Amplifier Replacement ..................................................................................47
6.13 Module Transportation ......................................................................................................47
APPENDIX A.........................................................................................................................48
Amendment List Record Sheet......................................................................................................48
Glossary of Terms...........................................................................................................................49
Key to AFL Drawing Symbols........................................................................................................50
APPENDIX B.........................................................................................................................51
Initial Equipment Set-Up Calculations ..........................................................................................51
General Information.........................................................................................................................................51
Antenna Systems ............................................................................................................................................51
Initial Parameters.............................................................................................................................................51
Downlink Calculations .....................................................................................................................................51
Uplink Calculations ..........................................................................................................................................51
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Handbook Number: 50-187601HBKM Page: 3 of 51
1. INTRODUCTION
Scope and Purpose of Document
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. This is a controlled release document and, as such, becomes a part of Aerial
Facilities’ Total Quality Management System. Alterations and modification may therefore only be
performed by Aerial Facilities Ltd.
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 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.
Limitation of Liability Notice
This manual is written for the use of technically competent operators/service persons. No liability is
accepted by AFL for use or misuse of this manual, the information contained herein, 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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2. SAFETY CONSIDERATIONS
2.1 Earthing of Equipment
Cell Enhancers 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
Electrical shocks due to faulty mains driven power supplies.
Whilst ever potentially present in any electrical equipment, such a condition would be
minimised by quality installation practice and thorough testing at:
a) Original assembly
b) Commissioning
c) Regular intervals, thereafter.
All test equipment to be in good working order prior to its use. High current power supplies can be
dangerous because of the possibility of substantial arcing. Always switch off during disconnection and
reconnection.
2.3 RF Radiation Hazard
RF radiation, (especially at UHF frequencies) arising from transmitter outputs
connected to AFL’s equipment, must be considered a safety hazard.
This condition might only occur in the event of cable disconnection, or because a
‘spare’ output has been left 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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2.4 Chemical Hazard
Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes
used in devices within equipment produced by Aerial Facilities Ltd. Beryllium oxide
dust can be toxic if inhaled, leading to chronic respiratory problems. It is harmless if
ingested or by contact.
Products that contain beryllium are load terminations (dummy loads) and some power amplifiers.
These products can be identified by a yellow and black “skull and crossbones” danger symbol (shown
above). They are marked as hazardous in line with international regulations, but pose no threat under
normal circumstances. Only if a component containing beryllium oxide has suffered catastrophic
failure, or exploded, will there be any danger of the formation of dust. Any dust that has been created
will be contained within the equipment module as long as the module remains sealed. For this reason,
any module carrying the yellow and black danger sign should not be opened. If the equipment is
suspected of failure, or is at the end of its life-cycle, it must be returned to Aerial Facilities Ltd for
disposal.
To return such equipment, please contact the Quality Department, who will give you a Returned
Materials Authorisation (RMA) number. Please quote this number on the packing documents, and on
all correspondence relating to the shipment.
PolyTetraFluoroEthylene, (P.T.F.E.) and P.T.F.E. Composite Materials
Many modules/components in AFL equipment contain P.T.F.E. as part of the RF insulation barrier.
This material should never be heated to the point where smoke or fumes are evolved. Any person
feeling drowsy after coming into contact with P.T.F.E. especially dust or fumes should seek medical
attention.
2.5 Laser Safety
General working practices adapted from EN60825-2: 2000
“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
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.
2.6 Emergency Contact Numbers
The AFL Quality Department can be contacted on:
Telephone +44 (0)1494 777000
Fax +44 (0)1494 777002
e-mail qa@aerialfacilities.com
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3. EQUIPMENT OVERVIEW
3.P Photographs
External front view, door closed
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Photographs continued...............
Mains PSU
Downlink power amplifier
Uplink channel modules
Downlink channel modules
Uplink switched attenuator
Uplink power amplifier
Downlink switched attenuator
Mains isolation switch
Internal view, door open
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Photographs continued...............
View of R.H.S Ports & Earthing bolt
View of L.H.S (Base) Ports
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3.1 Description
The cell enhancer is constructed within an environmentally protected case which may be either freestanding or (usually) permanently secured to a vertical wall.
The unit is an on-frequency, two-way repeater which draws its downlink input from an off-air antenna,
amplifies the signal through a pair of channel selective modules, (the modules ‘pick-out’ the channel
from within the frequency band, subjecting it to automatic gain, phase-locked tuning using a set of 16
DIP switches to digitally control the channel frequency). Downlink output to the mobile antenna is
approximately 10Watts and the uplink output to the base antenna is approximately 5Watts.
The whole system is powered from a mains-driven PSU module which supplies 12V DC from 115V
AC mains at a power not exceeding 150Watts. No battery backup is fitted to this system.
All active devices have in-built alarm circuitry which terminates as volt-free, relay contact pairs on an
internal connector. These pairs may be wired in series to produce a single pair that is the ‘sum’ of all
the alarmed devices in the system.
3.2 Technical Specification
PARAMETER SPECIFICATION
Frequency range:
Bandwidth: 1.5MHz
Passband ripple: ±1.5dB
Gain: >90dB (typical)
Gain Adjustment: 0 - 30dB (in 2dB steps)
Uplink Power: >5Watts
Downlink Power: >10Watts
Third order intercept point(OIP3):
1dB compression point:
AGC:
Chan module gain:
Temperature range:
(volt-free contacts/TTL)
Downlink: -21dBm
Uplink: -20dBm
Downlink: 10dB (downlink)
Uplink: 15dB (uplink)
Noise Figure: <6dB
VSWR: better than 1.5:1
RF Connectors: N type, female
operational:
storage:
451.5-453.0MHz (Downlink)
456.5-458.0MHz (Uplink)
54dBm (downlink)
50dBm (uplink)
40.3dBm (downlink)
37.5dBm (uplink)
-10°C to +60°C
-40°C to +70°C
1 Amplifiers Alarms Fitted:
2 PSU
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3.3 Mechanical Specification
PARAMETER SPECIFICATION
Height:
Case size
(excluding heatsinks, connectors, handles and feet)
Temperature
Range:
RF Connectors:
Environmental Protection:
Finish:
Supply Cable:
Width:
Depth:
Fixings:
operational:
storage:
Weight:
Case:
Heatsinks:
Handles:
620mm
420mm
250mm
4 holes on 470(w) x 500(h)mm
-10°C to +60°C
-40°C to +70°C
25kg (approximately)
N type female
IP65 (with door closed and all ports terminated)
To RAL 7032/5
Matt black (where fitted)
Black Technopolymer
Unit supplied with suitable supply input leads with
connector and appropriate length of cable
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Handbook Number: 50-187601HBKM Page: 11 of 51
3.4 Parts List
AFL Part # Part Description Qty.
02-010201 6P C/L FILTER 380-500 <4 MHz SMA 4
07-002503 2 WAY SPLITTER 50/500MHz SMA 4
10-000703 1/4W 0-30dB SWITCHED ATTENUATOR 2
11-007302 LNA. 380-500MHz 20dB (C/W RELAY) GA 2
11-007402 LNA. 380-500MHz 30dB (C/W RELAY) GA 2
12-021601 TETRA 5W +12V AMPLIFIER 1
12-022101 PA 380-470MHz 10W CLASS A +12V 1
13-003301 MAINS FILTER 8AMP ASSEMBLY 1
17-000126 CELL ENHANCER LABEL 6 DIGIT 1
17-000526 CE 10W HEATSINK THERMAL GASKET 3
17-001522 BASE PLATE 560 x 345mm 17-001520&9020 1
17-001523 GREY RAL7032 H/SINK BLANKING PLATE 1
17-002101 CHANNEL CONTROL MODULE 1
17-002103 26WAY RIBBON CABLE LEAD 4
17-003007 CHAN MOD 450MHz, 30kHz B/W 8 pole 4
17-003022 MODULE PATTERNED LEAVE 4
17-003023 SUBRACK SIDE PANEL 2
17-003024 SUBRACK REAR BRACKET 2
17-003025 BOTTOM MODULE GUIDE 4
17-003029 TOP MODULE GUIDE 4
17-009020 ENCLOSURE 620 x 420 x 250 (3 H/S) ALU 1
80-008901 12V RELAY PCB ASSEMBLY **NO LED** 1
80-032320 10W PA HEATSINK 2
90-100009 CABLE 3CORE MAINS '6 A' USA COLOURS 1
90-400006 6 pin BULGIN ALARM LEAD 1
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 2
91-130001 SMA ADAPT 'T' ALL FEMALE 3 GHz 2
91-500011 PWR 3POLE PNL PLUG SEALED IP68 1
91-500015 PWR CON CAP SEALED with INT. THREAD 2
91-500016 PWR 6POLE PNL PLUG SEALED IP68 1
91-600005 'D' 9 WAY SOCKET S/B TERM 4
91-600007 'D' 9 WAY BLACK SHELL 4
91-600019 'D'15 WAY SHELL (2W7) 2
91-640004 LARGE PIN FOR 91-660001 D SOCKET 4
91-660001 2W5 MIXED D TYPE SOCKET (7 WAY) 2
91-700017 ICD 15 WAY 0.1' CONNECTOR 1
92-280033 Captive Screw 8
96-300052 JWS150-12/A PSU (COUTANT LAMBDA) 1
96-700034 LED RED 5mm IP67 INTEGRAL RES. 24V 1
96-700035 LED GREEN 5mm IP67 INTEGRAL RES 24V 1
96-900017 AC TRIP SWITCH (3 AMP M.C.B.) 1
97-000002 BLACK MODULE CAGE RUNNER 8
97-300010 C/E SUPPLY INPUT COVER 1
97-400011 BLACK POLYMIDE HANDLE 120mm 2
97-400012 SCHROFF BLACK DOOR LOCK 20234 024 2
97-600002 SUBRACK M2.5 STD TAP 2
97-900004 RUBBER FOOT FOR CELL ENHANCERS 4
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3.5 System Diagram
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4. SUB-UNIT MODULES
4.1 Bandpass Filter (02-010201)
4.1.1 Description
The bandpass filters are multi-section designs with a bandwidth dependent upon the passband
frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with a
passband design ripple of 0.1dB. The filters are of combline design, and are carefully aligned during
manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit.
The tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR figure
and 50Ω load at the input and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life and require no
maintenance. Should a filter be suspect, it is usually most time efficient to replace the module rather than
attempt repair or re-tuning.
4.1.2 Technical Specification
PARAMETER SPECIFICATION
Response type: Chebyshev
Frequency range:
Bandwidth: 1.5 MHz
Number of sections: 6
Insertion Loss: 1.2 dB
VSWR: better than 1.2:1
Connectors: SMA
Power handling: 100W max
Temperature range
operation: -20°C to +60°C
storage: -40°C to +70°C
Weight: 3 kg (typical)
451.5-453.0MHz (downlink)
456.5 – 458.0MHz (uplink)
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Handbook Number: 50-187601HBKM Page: 14 of 51
4.2 Two-Way Splitter (07-002503)
4.2.1 Description
This wideband, 2 way hybrid splitter, is an AFL stock item with many years of reliable service. The
successful construction of such a device, relies largely on a PCB developed within a rigid
specification, skilled assembly and testing. Insertion loss quoted is typical, any unit will be within 5%
of this figure.
4.2.2 Technical Specification
PARAMETER SPECIFICATION
Frequency Range 50 – 500MHz
Split ratio 1:2
Insertion Loss 3.2dB (typical)
Isolation >20dB
Power rating 1.0 Watt
VSWR Better than 1.3:1
Available connectors BNC, N type, SMA
Weight 200gms (approximately)
Temperature
range
operation: -20°C to +60°C
storage: -40°C to +70°C
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Handbook Number: 50-187601HBKM Page: 15 of 51
4.2.3 Drg. # 07-002501, 2 Way Splitter Assembly Drawing
RS
4/12/98
DBS
4/6/93
BYDATEDESCRIPTIONNo
ISSUE
ISSCUST OM ER DRG .No
1A
07-002501
16
10
4
OR
1
16
11
4
1
PRODUCTION ISSUE (CR0962) 1A
1 PRODUCTION ISSUE
2 WAY SPLITT ER
20
4
5 13 16
(BL UE MARKED PIN AT H1)
FITTED FROM UNDERSIDE OF PCB
21 17
H1
Aer ial
*
Fa cilities L td
Issu e 1
07-2525-3
LID REMOVE D FOR CLARITY
1
10
4
16
GENERAL ASSEMBLY
TITLE
England
Aerial Facilities Ltd
Fax (0494)764838
Little Chalfont(0494)763636
USE D ON:
Two Channel UHF Cell Enhancer
User Handbook
26
IN 2 POSNS
1:1
*
SCALE
8
BY AERIAL FACILITIES L TD.
PERM ISSIB LE ON LY IF EX PRESS LY AUTHO RISE D IN WRITING
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
THIS IS A PROPRIETARY DESIGN O F AERIAL FACILITIES LT D.
(SOLDER SPLITTER CASE TO UNDE RSIDE OF
BOARD-OPPOSITE POSITION MARKED: )
NOTES:
1. SOLDERING TO BE COMPLETED USING ITEM
2. FIT ITEM TO COVER 2 S CREWS OF ITEM 2
DATE
DBS 0 4/06/93
DRAWN
TWO DECIMAL PLACES ± 0.1mm
ONE DECIMAL PL ACE ± 0.3m m
NO DECIMA L P LA CE ± 1m m
TO L ERANCE S
APPDCHKD
AL L DIMENS IONS ARE IN m m
UNLESS OT HERWISE STATED
Handbook Number: 50-187601HBKM Page: 16 of 51
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