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Weehawken Tunnel Radio
Repeater System
User/Maintenance Handbook
For
G.E Transport Systems
AFL Works Order N.: Q112727
AFL product part N.’s: 50-118101 (3 Ch UHF CCE)
50-118201 (UHF Simplex CCE)
50-118301 (1 Ch UHF CCE)
80-230701 (UHF Triplexer)
80-231301 (VHF/UHF Power Supply)
80-231303 (Alarm System)
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Table of Contents
INTRODUCTION ............................................................................................................................................6
Scope................................................................................................................................................................................ 6
Purpose............................................................................................................................................................................ 6
EC DECLARATION OF CONFORMITY.................................................................................................................. 7
Glossary of Terms .......................................................................................................................................................... 8
Key to AFL RF Module Drawing Symbols.................................................................................................................. 9
1. SAFETY CONSIDERATIONS ..........................................................................................................10
1.1 Earthing of Equipment ................................................................................................................................... 10
1.2 Electric Shock Hazard .................................................................................................................................... 10
1.3 RF Radiation Hazard...................................................................................................................................... 11
1.4 Chemical Hazard............................................................................................................................................. 12
1.5 Emergency Contact Numbers ........................................................................................................................ 12
2. OVERVIEW/ SYSTEM DESCRIPTION..........................................................................................13
2.1 General System Description ........................................................................................................................... 13
3. WEEHAWKEN UHF RACK DRAWINGS ......................................................................................14
3.1 UHF Rack System Diagram, Drg. Nō. 80-231482 ........................................................................................14
3.2 UHF Rack Layout and Interconnections Diagram, Drg. Nō. 80-231453 ...................................................15
3.3 Rack to Rack Interconnections Diagram, Drg. Nō. 80-231455 ................................................................... 16
3.4 Weehawken UHF System Frequencies Look-up Table ...............................................................................17
4. UHF CELL ENHANCERS ................................................................................................................. 18
4.1 Three Channel UHF Cell Enhancer 50-118101............................................................................................ 18
4.1.1 Three Channel UHF Cell Enhancer Description..........................................................................................18
4.1.2 Three Channel UHF Cell Enhancer Electrical Specifications...................................................................... 18
4.1.3 Three Channel UHF Cell Enhancer Mechanical Specifications ..................................................................19
4.1.4 Three Channel UHF Cell Enhancer System Diagram, Drg. Nō. 50-118181................................................ 20
4.1.5 Three Channel UHF Cell Enhancer Outline Drawing, Drg. Nō. 50-118191 ............................................... 21
4.1.6 Three Channel UHF Cell Enhancer 50-118101 Parts List........................................................................... 22
4.2 UHF Simplex Cell Enhancer (50-118201) ..................................................................................................... 23
4.2.1 UHF Simplex Cell Enhancer Description ..................................................................................................... 23
4.2.2 UHF Simplex Cell Enhancer Technical Specification ..................................................................................23
4.2.3 UHF Simplex Cell Enhancer System Diagram, Drg. Nō. 50-118281...........................................................24
4.2.4 UHF Simplex Cell Enhancer Outline Drawing............................................................................................. 25
4.2.5 UHF Simplex Cell Enhancer Parts List ........................................................................................................ 26
4.3 One Channel UHF Cell Enhancer (50-118301) ............................................................................................27
4.3.1 One Channel UHF Cell Enhancer Description ............................................................................................27
4.3.2 One Channel UHF Cell Enhancer Technical Specification..........................................................................27
4.3.3 One Channel UHF Cell Enhancer System Diagram.....................................................................................28
4.3.4 One Channel UHF Cell Enhancer Outline Drawing .................................................................................... 29
4.3.5 One Channel UHF Cell Enhancer Parts List................................................................................................ 30
5. UHF PASSIVE SYSTEM COMPONENTS.......................................................................................31
5.1 UHF Triplexer (80-230701) ............................................................................................................................ 31
5.1.1 UHF Triplexer Description...........................................................................................................................31
5.1.2 UHF Triplexer Technical Specification ........................................................................................................ 31
5.1.3 UHF Triplexer System Diagram, Drg. Nō. 80-230781.................................................................................32
5.1.4 UHF Triplexer Shelf Outline Drawing, Drg. Nō. 80-230791 ....................................................................... 33
5.1.5 UHF Triplexer Parts List .............................................................................................................................. 34
5.2 UHF Hybrid Cross-Band Coupler (80-230702)............................................................................................ 35
5.2.1 UHF Hybrid Cross-Band Coupler Description ............................................................................................35
5.2.2 UHF Hybrid Cross-Band Coupler Shelf Technical Specification................................................................. 35
5.2.3 UHF Hybrid Cross-Band Coupler System Diagram, Drg. Nō. 80-230782 .................................................. 36
5.2.4 UHF Hybrid Cross-Band Coupler Shelf Outline Drawing, Drg. Nō. 80-230792......................................... 37
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5.2.5 UHF Hybrid Cross-Band Coupler Parts List................................................................................................38
6. POWER SUPPLIES & ALARMS ...................................................................................................... 39
6.1 UHF Power Supply (80-231301) ....................................................................................................................39
6.1.1 UHF Power Supply Description ...................................................................................................................39
6.1.2 UHF Power Supply Technical Specification.................................................................................................39
6.1.3 UHF Power Supply System Diagram............................................................................................................39
6.1.4 UHF Power Supply Outline Drawing, Drg. Nō. 80-231391......................................................................... 40
6.1.5 UHF Power Supply Parts List....................................................................................................................... 41
6.2 Alarm/Monitor Shelf (80-231303).................................................................................................................. 42
6.2.1 Alarm/Monitor Shelf Description..................................................................................................................42
6.2.2 Alarm/Monitor Shelf Technical Specification ............................................................................................... 42
6.2.3 Alarm/Monitor Shelf Parts List ..................................................................................................................... 43
7. SUB-UNIT MODULES .......................................................................................................................44
7.1 Bandpass Filter (02-013401)...........................................................................................................................44
7.1.1 Description....................................................................................................................................................44
7.1.2 Technical Specification ................................................................................................................................. 44
7.2 Tx Hybrid Coupler (05-000101)..................................................................................................................... 45
7.2.1 Description....................................................................................................................................................45
7.2.2 Technical Specification ................................................................................................................................. 45
7.3 3dB UHF Splitter (05-002603)........................................................................................................................ 46
7.3.1 Description....................................................................................................................................................46
7.3.2 Technical Specification ................................................................................................................................. 46
7.4 1 Watt 3dB Broadband Splitter (05-002901) ................................................................................................ 47
7.4.1 Description....................................................................................................................................................47
7.4.2 Technical Specification ................................................................................................................................. 47
7.5 Crossband Coupler (07-005701) ....................................................................................................................48
7.5.1 Description....................................................................................................................................................48
7.5.2 Technical Specification ................................................................................................................................. 48
7.6 Crossband Coupler (07-005705) ....................................................................................................................49
7.6.1 Description....................................................................................................................................................49
7.6.2 Technical Specification ................................................................................................................................. 49
7.7 ¼Watt 0- -30 & 0-15dB Switched Attenuator (10-000701 & 10-000901)...................................................49
7.7.1 General Application ...................................................................................................................................... 49
7.7.2 Switched Attenuators..................................................................................................................................... 49
7.8 Low Noise Amplifiers (11-007302 & 11-007402) .......................................................................................... 50
7.8.1 Description....................................................................................................................................................50
7.8.2 Technical Specification, 11-007302..............................................................................................................50
7.8.3 Technical Specification, 11-007402..............................................................................................................50
7.8.4 LNA ‘D’ Connector Pin-out details ..............................................................................................................51
7.9 1Watt Low Power Amplifier (11-007901) ..................................................................................................... 52
7.9.1 Description....................................................................................................................................................52
7.9.2 Technical Specifications................................................................................................................................ 52
7.10 5Watt Medium Power TETRA Amplifier (12-021601)................................................................................53
7.10.1 Description ................................................................................................................................................ 53
7.10.2 Technical Specification .............................................................................................................................53
7.10.3 PA 7-Way Connector Pin-outs ..................................................................................................................53
7.10.4 PA Connector Pin-Outs............................................................................................................................. 54
7.11 10 & 20W Power Amplifiers (12-016302 & 12-016301)...............................................................................55
7.11.1 Description ................................................................................................................................................ 55
7.11.2 Technical Specification .............................................................................................................................55
7.11.3 PA ‘D’ Connector Pin-out details ............................................................................................................. 55
7.12 D.I.P Channel Control Module (17-002101)................................................................................................. 56
7.12.1 Description ................................................................................................................................................ 56
7.12.2 Programming Procedure .......................................................................................................................... 57
7.12.3 12.5kHz step size switch functions ............................................................................................................57
7.12.4 25kHz step size switch functions ...............................................................................................................58
7.12.5 Programming Example .............................................................................................................................58
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7.12.6 17-002101 Controller Module DIP Switch Connector Data ....................................................................59
7.12.7 Drg. Nō. 17-002190, DIP Switch Module Controller Outline Drawing ................................................... 60
7.13 Channel Selective Modules (17-003033 & 17-010803) ................................................................................. 61
7.13.1 Description ................................................................................................................................................ 61
7.13.2 Drg. Nō. 17-003080, Generic Channel Module Block Diagram ..............................................................62
7.14 12 & 24V Relay Boards (20-001601 & 20-001602)....................................................................................... 63
7.14.1 Description ................................................................................................................................................ 63
7.14.2 Technical Specification .............................................................................................................................63
7.15 12 & 24V Single Relay Board (80-008901 & 80-008902).............................................................................64
7.15.1 Description ................................................................................................................................................ 64
7.16 24V, 400W Power Supply Pack (96-300054).................................................................................................64
7.16.1 Description ................................................................................................................................................ 64
7.16.2 Technical Specification .............................................................................................................................64
8. INSTALLATION.................................................................................................................................65
8.1 General Remarks ............................................................................................................................................65
8.2 RF Connections ...............................................................................................................................................66
8.3 Commissioning ................................................................................................................................................66
9. MAINTENANCE.................................................................................................................................67
9.1 Fault Finding ...................................................................................................................................................67
9.1.1 Quick Fault Checklist.................................................................................................................................... 67
9.1.2 Fault Isolation...............................................................................................................................................67
9.1.3 Downlink ....................................................................................................................................................... 68
9.1.4 Uplink............................................................................................................................................................68
9.1.5 Checking service ...........................................................................................................................................68
9.1.6 Fault repair ................................................................................................................................................... 69
9.1.7 Service Support .............................................................................................................................................69
9.2 Tools & Test Equipment................................................................................................................................. 69
9.3 Care of Modules ..............................................................................................................................................70
9.3.1 General Comments........................................................................................................................................70
9.3.2 Module Removal (LNA’s, general procedure):.............................................................................................70
9.3.3 Module Replacement (general):....................................................................................................................70
9.3.4 Power Amplifiers........................................................................................................................................... 70
9.3.5 Low Power Amplifier Replacement...............................................................................................................71
9.3.6 Module Transportation: ................................................................................................................................ 71
APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS ....................................................72
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AMENDMENT LIST RECORD SHEET
Issue
Nō.
Date Incorporated
by
Page No.’s
Amended
Reason for new issue
A 05/09/2005 CMH 1st Draft
Document Ref:-Weehawken_UHF
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INTRODUCTION
Scope
This handbook is for use solely with the equipment identified by the AFL Part Number shown
on the front cover. It is not to be used with any other equipment unless specifically authorised
by Aerial Facilities Limited.
Purpose
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 Information Notice
This manual is written for the use of technically competent operators/service persons. No
liability is accepted by AFL for use or misuse of this manual, the information contained
therein, or the consequences of any actions resulting from the use of the said information,
including, but not limited to, descriptive, procedural, typographical, arithmetical, or listing
errors.
Furthermore, AFL does not warrant the absolute accuracy of the information contained within
this manual, or it’s completeness, fitness for purpose, or scope.
AFL has a policy of continuous product development and enhancement, and as such, reserves
the right to amend, alter, update and generally change the contents, appearance and pertinence
of this document without notice.
All AFL products carry a twelve month warranty from date of shipment. The warranty is
expressly on a return to base repair or exchange basis and the warranty cover does not extend
to on-site repair or complete unit exchange.
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EC DECLARATION OF CONFORMITY
In accordance with BS EN ISO/IEC 17050-1&-2:2004
AERIAL FACILITIES LTD
Aerial House
Asheridge Road
Chesham
Bucks HP5 2QD
United Kingdom
DECLARES, UNDER OUR SOLE RESPONSIBILITY THAT THE FOLLOWING PRODUCT
0086
PRODUCT PART NO[S] 50-118101, 50-118201, 50-118301
PRODUCT DESCRIPTION Weehawken UHF repeater system
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
TECHNICAL DIRECTOR
DATE: 08/11/2005
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Glossary of Terms
Repeater or
Cell Enhancer A Radio Frequency (RF) amplifier which can simultaneously
amplify and re-broadcast Mobile Station (MS) and Base
Transceiver Station (BTS) signals.
Band Selective Repeater A Cell Enhancer designed for operation on a range of channels
within a specified frequency band.
Channel Selective
Repeater A Cell Enhancer, designed for operation on specified
channel(s) within a specified frequency band. Channel
frequencies may be factory set or on-site programmable.
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 = RF
+(C/I)/2
out
PA Power Amplifier
RF Radio Frequency
RSA Receiver/Splitter Amplifier
Rx Receiver
S/N Serial Number
Tx Transmitter
Uplink (U/L) RF signals transmitted from the MS to the BTS
VSWR Voltage Standing Wave Ratio
WDM Wave division multiplex
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Key to AFL RF Module Drawing Symbols
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1. SAFETY CONSIDERATIONS
1.1 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.
1.2
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.
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1.3 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 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.
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1.4 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.
1.5 Emergency Contact Numbers
The AFL Quality Department can be contacted on:
Telephone +44 (0)1494 777000
Fax +44 (0)1494 777002
e-mail qa@aerial.co.uk
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2. OVERVIEW/ SYSTEM DESCRIPTION
2.1 General System Description
The Weehawken tunnel radio system is designed to amplify various bands of radio frequencies,
in either channelised or band selective modes. This handbook is dedicated to the UHF radio
repeating system. All the hardware is built into standard 19” rack mounted cabinets which have
an environmental IP rating of 54.
The systems in this document will be described separately, as individual shelves (UHF) and the
various passive combiners, splitters and cross-band coupler shelves will be described in other
documents. Every active module in the entire system has a dedicated alarm and these are series
wired within the shelves to a relay which gives a volt-free output pair for each shelf which is
wired to a ‘krone-block’ termination in the bottom of the rack cabinet.
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3. WEEHAWKEN UHF RACK DRAWINGS
3.1 UHF Rack System Diagram, Drg. N. 80-231482
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3.2 UHF Rack Layout and Interconnections Diagram, Drg. N. 80-231453
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3.3 Rack to Rack Interconnections Diagram, Drg. N. 80-231455
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3.4 Weehawken UHF System Frequencies Look-up Table
Agency
Jersey City Police Department UHF CHN 1 465.3750 460.3750
Jersey City Fire Department UHF CHN 2 465.5500 460.5500
Jersey City Fire Department UHF CHN 3 465.6000 460.6000
Hoboken Fire Dept UHF CHN 4 471.5500 471.5500
West New York Police Department UHF CHN 5 473.3125 470.3125
Channel
Number
Uplink Tx Downlink Rx
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4. UHF CELL ENHANCERS
4.1 Three Channel UHF Cell Enhancer 50-118101
4.1.1 Three Channel UHF Cell Enhancer Description
The UHF (400MHz band) cell enhancer employs three channel modules in each path for
three dedicated frequencies (NJ FD x2 & NJPD). The downlink output is realised using a
phased-parallel arrangement for the power amplifiers which effectively doubles their
20Watts output.
All amplifiers have built-in alarms which are configured as a summary, volt-free relay
contact pair terminating at pins 1 & 2 on the ‘D’ type alarm connector.
4.1.2 Three Channel UHF Cell Enhancer Electrical Specifications
PARAMETER SPECIFICATION
Frequency range:
460.3-460.7MHz (Downlink)
465.3-465.7MHz (Uplink)
Bandwidth: 0.4MHz
Gain: >90dB
Gain Adjustment: 0 - 30dB (in 2dB steps)
Uplink Power: >10.0Watts
Downlink Power: >20.0Watts (x2)
IP3:
Uplink +40dBm
Downlink +54dBm
Downlink AGC gain: 10dB
Downlink AGC level: -22dBm
Uplink AGC gain: 14dB
Uplink AGC level: -8dBm
Noise Figure: <6dB (at maximum gain)
AGC: Fitted in channel modules
VSWR: better than 1.5:1
RF Connectors: N type, female
Temperature range:
Alarms Fitted:
(volt-free contacts/TTL)
operational:
storage:
-10°C to +55°C
-40°C to +70°C
1 Downlink amplifiers
2 Uplink amplifiers
3 Each channel module
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4.1.3 Three Channel UHF Cell Enhancer Mechanical Specifications
PARAMETER SPECIFICATION
Height: Standard Eurorack
Rack
Width: 19" (482.6mm)
Depth: 600mm (800 optional)
Height: 8U
Shelves:
Width: 19" (482.6mm)
Depth:
<400mm(excluding heatsinks, connectors,
handles and feet)
operational: -10°C to +55°C Temperature
range:
storage: -40°C to +70°C
Weight: 20kg (approximately)
Humidity: 5 – 95% non-condensing
RF Connectors: N type female
Environmental Protection: IP54
Case: Alocrom 1200
Finish:
Heatsinks: Matt black
Handles: Silver anodised alloy
Fascia Painted to RAL 7035
Unit supplied with suitable supply input
Supply Cable:
leads, connector and specified length of
cable
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4.1.4 Three Channel UHF Cell Enhancer System Diagram, Drg. N. 50-118181
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4.1.5 Three Channel UHF Cell Enhancer Outline Drawing, Drg. N. 50-118191
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4.1.6 Three Channel UHF Cell Enhancer 50-118101 Parts List
AFL Part Nō. Part Description Qty.
05-002603 UHF 3dB SPLITTER SMA 2
05-003803 3 WAY SPLITTER, UHF, ZINGER 4
10-000701 1/4W0-30dB SWITCHED ATTENUATOR 2
11-007302 LNA. 380-500MHz 20dB (C/W RELAY) GA 2
11-007402 LNA. 380-500MHz 30dB (C/W RELAY) GA 3
11-007901 AMPLIFIER TETRA 1W 37dB GAIN ASS 1
12-016301 PA 380-470MHz 20W CLASS A 2
12-016302 PA 380-470MHz 10W CLASS A 1
14-000225 CASE RAIL LONG R.S.A./R.F.A. 4
17-002101 CHANNEL CONTROL MODULE 2
17-002103 26WAY RIBBON CABLE LEAD 6
17-003033 CHAN MOD 450MHz, 15kHz (8p) BW TCXO 6
20-001601 12V RELAY BOARD 1
50-012825 CCE RACK MOUNTED HEATSINK BRACKET 4
50-012843 CCE RACK 8U CHASSIS 400mm DEEP 1
50-012844 CCE RACK LID 400mm DEEP 1
50-027720 RACK MTD CHAN C.E. MODIFIED HEATSIN 2
80-008901 12V RELAY PCB ASSEMBLY 1
80-090822 C/E 8U FRONT PANEL, AFL (RAL7035) 1
80-310420 BCC 400W POWER SUPPLY HEATSINK 1
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 4
91-510032 20A SOCKET CONTACT PIN 6
91-520001 PWR MAINS INL FIXED/SOLD.TERMS 1
91-600007 'D' 9 WAY BLACK SHELL 5
91-600014 'D' 9 WAY SOCKET S/B (NON FILTERED) 5
91-600015 'D' 9 WAY PLUG S/B (NON FILTERED) 1
91-660001 2W5 MIXED D TYPE SOCKET (7 WAY) 3
96-300054 24V 17A PSU 400W (XP BCC) 1
96-700034 LED RED 5mm IP67 1
96-700035 LED GREEN 5mm IP67 1
96-900018 AC TRIP SWITCH (5 AMP M.C.B.) 1
97-400005 HANDLE TYPE H6802 3U [ALLOY] 2
99-200008 DANGER HIGH VOLTAGE LABEL 2 x 2' 1
99-200017 CAUTION HEAVY LABEL 75 x 55mm 2
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4.2 UHF Simplex Cell Enhancer (50-118201)
4.2.1 UHF Simplex Cell Enhancer Description
The UHF Simplex cell enhancer operates by muting the uplink channel when the downlink
channel is transmitting, and vice-versa so that positive feedback between Tx and Rx
amplifiers is not possible.
4.2.2 UHF Simplex Cell Enhancer Technical Specification
PARAMETER SPECIFICATION
Frequency range:
460.3-460.7MHz (Downlink)
465.3-465.7MHz (Uplink)
Bandwidth: 0.4MHz
Gain: >90dB
Gain Adjustment: 0 - 30dB (in 2dB steps)
Uplink Power: >10.0Watts
Downlink Power: >20.0Watts (x2)
IP3:
Uplink +40dBm
Downlink +54dBm
Downlink AGC gain: 10dB
Downlink AGC level: -22dBm
Uplink AGC gain: 14dB
Uplink AGC level: -8dBm
Noise Figure: <6dB (at maximum gain)
AGC: Fitted in channel modules
VSWR: better than 1.5:1
RF Connectors: N type, female
Temperature
range:
operational:
storage:
-10°C to +55°C
-40°C to +70°C
Case: Alocrom 1200
Finish:
Heatsinks: Matt black
Handles: Silver anodised alloy
Fascia Painted to RAL 7035
Alarms Fitted:
(volt-free contacts/TTL)
1 Downlink amplifiers
2 Uplink amplifiers
3 Each channel module
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4.2.3 UHF Simplex Cell Enhancer System Diagram, Drg. N. 50-118281
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4.2.4 UHF Simplex Cell Enhancer Outline Drawing
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4.2.5 UHF Simplex Cell Enhancer Parts List
AFL Part Nō. Part Description Qty.
08-930003 2 PORT ISOLATOR 360-470MHz SMA 2
10-000901 SW. ATTENUATOR 0.25W 0-15dB 4
11-007302 LNA. 380-500MHz 20dB (C/W RELAY) GA 3
11-007402 LNA. 380-500MHz 30dB (C/W RELAY) GA 2
11-007901 AMPLIFIER TETRA 1W 37dB GAIN ASS 1
12-021601 TETRA 5W +12V AMPLIFIER 1
17-009724 EQUIP. MTG PLATE No.5 2
17-010803 CH MOD 450MHz 8p 15kHz BW+IFRX TCXO 2
19-000826 2U,3U,4U 19" UNIT 400 DEEP LID 1
19-000921 3U 19" UNIT 400 DEEP CHASSIS + BKT 1
19-000924 3U 19" UNIT FRONT PANEL FAB 1
80-008901 12V RELAY PCB ASSEMBLY 1
80-063920 HEATSINK 2U ASS140 (5W) MILCHBUCK 2
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 4
91-500001 POWER PLG 3 PIN PNL.MOUNT NC-X 1
91-510003 3 PIN R.ANGLE FREE SOC.NC-X. 1
91-510032 20A SOCKET CONTACT PIN 2
91-600001 'D'TYPE 9 WAY PLUG S/B TERM 1
91-600014 'D' 9 WAY SOCKET S/B (NON FILTERED) 6
91-620001 'D' 25 WAY SOCKET S/B TERM 2
91-660001 2W5 MIXED D TYPE SOCKET (7 WAY) 1
93-540035 1K3 0.25W 1% RES MRS25 M:F 2
96-110001 FUSE HOLDER 20 x 5mm6.3A 1
96-600002 INSULATING BOOT SMALL 1
96-600003 INSULATING BOOT D.C. 1
96-700017 LED AMBER 5MM SEALED IP66 2
96-700034 LED RED 5mm IP67 1
96-700035 LED GREEN 5mm IP67 1
97-400005 HANDLE TYPE H6802 3U [ALLOY] 2
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4.3 One Channel UHF Cell Enhancer (50-118301)
4.3.1 One Channel UHF Cell Enhancer Description
The 5W/1W single channel cell enhancer is for the West New York PD in order that this
agency may communicate into and out of the Weehawken tunnel.
4.3.2 One Channel UHF Cell Enhancer Technical Specification
PARAMETER SPECIFICATION
Frequencies:
Gain: >90dB
Gain Adjustment: 0 - 30dB (in 2dB steps)
Uplink Power: >1.0Watts
Maximum uplink output: +30.8dBm
Downlink Power: >5.0Watts
Maximum downlink output power: +37.5dBm
IP3:
Uplink +44dBm
Downlink +50dBm
Downlink Ch. module AGC level: -17dBm
Uplink Ch. module AGC level: -8dBm
Noise Figure: <6dB (at maximum gain)
AGC: Fitted in channel modules
VSWR: better than 1.5:1
RF Connectors: N type, female
operational:
range:
storage:
Case: Alocrom 1200
Finish:
Heatsinks: Matt black
Handles: Silver anodised alloy
Fascia: Painted to RAL 7035
Alarms Fitted:
(volt-free contacts/TTL)
470.3125MHz (Downlink)
473.3125MHz (Uplink)
-10°C to +55°C Temperature
-40°C to +70°C
1 Downlink amplifiers
2 Uplink amplifiers
3 Each channel module
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4.3.3 One Channel UHF Cell Enhancer System Diagram
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4.3.4 One Channel UHF Cell Enhancer Outline Drawing
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4.3.5 One Channel UHF Cell Enhancer Parts List
AFL Part Nō. Part Description Qty.
08-930003 2 PORT ISOLATOR 360-470MHz SMA 2
10-000901 SW. ATTENUATOR 0.25W 0-15dB 4
11-007302 LNA. 380-500MHz 20dB (C/W RELAY) GA 3
11-007402 LNA. 380-500MHz 30dB (C/W RELAY) GA 2
11-007901 AMPLIFIER TETRA 1W 37dB GAIN ASS 1
12-021601 TETRA 5W 12V AMPLIFIER 1
17-001107 OPEN COLLECTOR FOR SIMPLEX CONT. 1
17-003033 CHAN MOD 450MHz, 15kHz (8p) BW TCXO 2
17-009724 EQUIP. MTG PLATE No.5 2
19-000826 2U,3U,4U 19" UNIT 400 DEEP LID 1
19-000921 3U 19" UNIT 400 DEEP CHASSIS + BKT 1
19-000924 3U 19" UNIT FRONT PANEL FAB 1
20-001601 12V RELAY BOARD 2
80-063920 HEATSINK 2U ASS140 (5W) 2
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 4
91-500001 POWER PLG 3 PIN PNL.MOUNT NC-X 1
91-510003 3 PIN R.ANGLE FREE SOC.NC-X. 1
91-510032 20A SOCKET CONTACT PIN 2
91-600001 'D'TYPE 9 WAY PLUG S/B TERM 1
91-600014 'D' 9 WAY SOCKET S/B (NON FILTERED) 6
91-620001 'D' 25 WAY SOCKET S/B TERM 2
91-660001 2W5 MIXED D TYPE SOCKET (7 WAY) 1
96-110001 FUSE HOLDER 20 x 5mm6.3A 1
96-600002 INSULATING BOOT SMALL 1
96-600003 INSULATING BOOT D.C. 1
96-700034 LED RED 5mm IP67 1
96-700035 LED GREEN 5mm IP67 1
97-400005 HANDLE TYPE H6802 3U [ALLOY] 2
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5. UHF PASSIVE SYSTEM COMPONENTS
5.1 UHF Triplexer (80-230701)
5.1.1 UHF Triplexer Description
The two triplexer shelves (80-230701 & 80-230702) are the interface between the UHF cell
enhancers and the tunnel leaky feeders. Two of these shelves exist, one uplink , one
downlink, both hardware identical but with the band selective filters in each being tuned for
uplink or downlink. Note that the semi-rigid cables which connect the three filters to the
output port is a critical length harness which must not be disturbed unless it is certain that
this component has failed. A replacement harness would necessitate the use of the test
equipment detailed in section 8.2 to ensure specification.
No alarms are fitted to passive shelves.
5.1.2 UHF Triplexer Technical Specification
PARAMETER SPECIFICATION
460.3-460.7MHz (80-230701/1)
471.5MHz (80-230701/1)
Frequency ranges:
470.3125MHz (80-230701/1)
465.3-465.7MHz (80-230701/2)
471.5MHz ±300kHz (80-230701/2)
473.3125MHz ±300kHz(80-230701/2)
VSWR: better than 1.5:1
RF Connectors: N type, female
range:
operational:
storage:
-10°C to +55°C Temperature
-40°C to +70°C
Case: Alocrom 1200
Finish:
Heatsinks: Matt black
Handles: Silver anodised alloy
Fascia Painted to RAL 7035
Alarms Fitted: None
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5.1.3 UHF Triplexer System Diagram, Drg. N. 80-230781
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5.1.4 UHF Triplexer Shelf Outline Drawing, Drg. N. 80-230791
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5.1.5 UHF Triplexer Parts List
AFL Part Nō. Part Description Qty.
02-013401 6P CL FILTER (0.5 min BW) LARGE SMA ASSY 3
19-000921K 3U CHASSIS KIT (400mm deep) 1
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 4
91-130001 SMA ADAPT 'T' ALL FEMALE 3 GHz 2
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5.2 UHF Hybrid Cross-Band Coupler (80-230702)
5.2.1 UHF Hybrid Cross-Band Coupler Description
The UHF cross-band coupler shelf allows the VHF and UHF frequencies to be combined to
the leaky feeder outputs using hybrid couplers which have been designed for a very low
insertion loss and high rejection.
No alarms are fitted to passive shelves.
5.2.2 UHF Hybrid Cross-Band Coupler Shelf Technical Specification
PARAMETER SPECIFICATION
Frequency ranges:
>380MHz (UHF pass)
<250MHz (VHF pass)
VSWR: better than 1.5:1
Insertion loss: <0.5dB
Rejection: >30dB
RF Connectors: N type, female
range:
operational:
storage:
-10°C to +55°C Temperature
-40°C to +70°C
Case: Alocrom 1200
Finish:
Heatsinks: Matt black
Handles: Silver anodised alloy
Fascia Painted to RAL 7035
Alarms Fitted: None
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5.2.3 UHF Hybrid Cross-Band Coupler System Diagram, Drg. N. 80-230782
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5.2.4 UHF Hybrid Cross-Band Coupler Shelf Outline Drawing, Drg. N. 80-230792
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5.2.5 UHF Hybrid Cross-Band Coupler Parts List
AFL Part Nō. Part Description Qty.
05-000101 TRANSMITTER HYBD COUPL.4 PORT 2
07-005701 CROSSBAND CPLR XC 250/380 N 2
19-000921K 3U CHASSIS KIT (400mm deep) 1
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 6
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6. POWER SUPPLIES & ALARMS
6.1 UHF Power Supply (80-231301)
6.1.1 UHF Power Supply Description
The power supply shelves are separate for the VHF/UHF and 800MHz cell enhancers. The
VHF/UHF supply shelf is a 24V DC shelf which supplies six, 24Volt XLR connector
outputs at a maximum total output power of 800Watts DC. These DC outputs are fused at a
10Amp rating although four of the six DC outputs will be drawing less than 5Amps at any
one time.
6.1.2 UHF Power Supply Technical Specification
PARAMETER SPECIFICATION
Input: 110V AC @50/60Hz (single port)
Outputs: 6 x 24V DC @ 10A each
Front panel indicators: (x 2) Green LED for ‘PSU1/PSU2 ON’’
Fuses 1 x 10A each outlet socket
DC Socket XLR
Temperature range
operational:
storage: -40ºC to +70ºC
-10°C to +55°C
Alarmed devices: Either PSU failure
Alarm interface (volt-free contacts): ‘D’ type alarm connector, pins 1 & 2
MTBF: >50,000 hours
Earthing: M8 stud
6.1.3 UHF Power Supply System Diagram
Not available at the time of compiling this document.
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6.1.4 UHF Power Supply Outline Drawing, Drg. N. 80-231391
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6.1.5 UHF Power Supply Parts List
AFL Part
Nō. Part Description Qty.
13-003301 MAINS FILTER 8AMP ASSEMBLY 1
20-001602 24V RELAY BOARD 1
80-008920 DUAL PSU HEATSINK 2
80-008921 DUAL PSU CASE 1
80-008922 DUAL PSU LID 1
80-008925 DUAL PSU FRONT PANEL 1
80-020632 2U CHASSIS LID FIXING RAIL 4
91-500025 3 PIN RIGHT ANGLE FREE PLUG NC-X 6
91-510004 3 PIN PNL.MOUNT SOCKET NC-X 6
91-510035 3 WAY MATE N LOK PLUG HOUSING 2
91-520001 PWR MAINS INL FIXED/SOLD.TERMS 1
91-520005 MAINS LEAD 1
91-520010 MAINS RETAINING CLIP 1
91-520032 MATE N LOK SOCKET CONTACT 20/14 AWG 6
91-600015 'D' 9 WAY PLUG S/B (NON FILTERED) 1
91-800014 3 WAY TERMINAL BLOCK 1
91-800015 TRIPLE DECK TERMINAL BLOCK 8
91-800016 TRIPLE DECK TERMINAL JUMPER 6
91-800017 TRIPLE DECK TERMINAL END 1
91-800028 DIN RAIL END-STOP 2
91-800031 SYMETRIC 35 x 7.5mm DIN RAIL 0
92-900014 DIN RAIL (TOP HAT) EARTH CLAMP M5 1
93-510077 0R02 50W RESISTOR ALUMINIUM CLAD 2
94-100004 STPS12045TV 60A DUAL DIODE 1
95-100007 TX.FERRITE ISOL.HT.SINK B/ANOD 3
96-110034 FUSE HOLDER 16-30A, 32mm BODY ONLY 6
96-110064 FUSE HOLDER 16-30A, 32mm INSERT 6
96-300054 24V 17A PSU 400W (XP BCC) 2
96-600001 INSULATING BOOT LARGE 1
96-700034 LED RED 5mm IP67 1
96-700035 LED GREEN 5mm IP67 2
96-920023 5A CIRCUIT BREAKER (ETA) 2
97-400002 HANDLE TYPE H6803 4U.[ALLOY] 2
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6.2 Alarm/Monitor Shelf (80-231303)
6.2.1 Alarm/Monitor Shelf Description
The alarm shelf acts as an alarm concentrator for all the alarms in the system. Firstly, within
each shelf containing active components, the individually alarmed modules are ‘summed’
and presented to that shelves’ 9-way alarm connector as a volt-free relay contact pair. These
alarm contact pairs are wired to the krone block in the lower rack space and from there the
pairs are presented to the alarm shelf. At the alarm shelf the pairs are summed together to
form an overall system alarm. In this way a system alarm may be broken down to scrutinise
the shelf alarm and ultimately to the individual modules’ alarms.
This shelf has its own dedicated mains-driven power 12V DC supply.
As all the alarms in the system are ‘held closed loops’, should any power supply fail, the
main system alarm will be triggered.
6.2.2 Alarm/Monitor Shelf Technical Specification
PARAMETER SPECIFICATION
Operating voltage: 12V (floating earth)
Alarm output relay contacts:
Max. switch current: 1.0Amp
Max. switch volts: 120Vdc/60VA
Max. switch power: 24W/60VA
Min. switch load: 10.0µA/10.0mV
Relay isolation: 1.5kV
Mechanical life:
Relay approval: BT type 56
Connector details: 25 Way ‘D’ Connector
Temperature range
>2x107 operations
operational: :-10°C to +55°C
storage: :-40°C to +70°C
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6.2.3 Alarm/Monitor Shelf Parts List
AFL Part Nō. Part Description Qty.
19-000724 1U 19" UNIT FRONT PANEL FAB 1
19-000725 1U 19" UNIT 400 DEEP CHASSIS + BKT 1
19-000826 2U,3U,4U 19" UNIT 400 DEEP LID 1
20-001601 12V RELAY BOARD 4
91-520003 POWER SWITCHD/FUSED MAINS INL. 1
91-520005 MAINS LEAD 1
91-520010 MAINS RETAINING CLIP 1
91-600014 'D' 9 WAY SOCKET S/B (NON FILTERED) 8
91-600015 'D' 9 WAY PLUG S/B (NON FILTERED) 8
96-300072 12V POWER SUPPLY TML15112C 1
96-600001 INSULATING BOOT LARGE 1
96-700034 LED RED 5mm IP67 8
96-700035 LED GREEN 5mm IP67 1
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7. SUB-UNIT MODULES
Note that the sub unit modules are tabled in part number order – the modules pertinent to any
particular shelf will be found in the parts list under the heading of that shelf.
7.1 Bandpass Filter (02-013401)
7.1.1 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 50 load at the input and output ports. Being passive devices,
the bandpass filters should have an extremely long operational life and require no maintenance.
Should a filter be suspect, it is usually most time efficient to replace the module rather than attempt
repair or re-tuning.
No adjustments should be attempted without full network sweep analysis facilities to monitor both
insertion loss and VSWR simultaneously.
7.1.2 Technical Specification
PARAMETER SPECIFICATION
Passband:
Insertion Loss:
FILTER 1 483.2-483.6MHz
FILTER 2 486.2-486.6MHz
FILTER 1 2.7 dB (typical)
FILTER 2 2.7 dB (typical)
FILTER 1 483.2-483.6MHz > 80 dB
Rejection:
FILTER 2 486.2-486.6MHz > 80 dB
Power Rating: 250Watts
Impedance: 50 ohm
VSWR: Better than 1.2:1
Connectors: SMA female
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7.2 Tx Hybrid Coupler (05-000101)
7.2.1 Description
The Hybrid Combiner used is a device for accurately matching two or more RF signals to single
or multiple ports, whilst maintaining an accurate 50Ω load to all inputs/outputs and ensuring
that the VSWR and insertion losses are kept to a minimum. Any unused ports will be terminated
with an appropriate 50Ω load.
7.2.2 Technical Specification
PARAMETER
SPECIFICATION
Frequency range: ƒo ± 10% (50 – 500 MHz)
Bandwidth: ƒo ± 10%
Inputs/Outputs: 2 each
Insertion Loss: <3.3 dB
Isolation between Input/Output ports: >27 dB
Return Loss (VSWR) – Input/Output: 1.3:1
Impedance: 50
Temperature range
operation: -10°C to +60°C
storage: -20°C to +70°C
MTBF: >180,000 hours
Power Rating – Splitter: Up to 150 Watts (load dependant)
Power Rating – Combiner: Available up to 100 Watts
Environmental: IP54
Connectors: ‘N’ female
Dimensions: 118 x 102 x 35 mm (incl. connectors)
Weight: 0.5 kg
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7.3 3dB UHF Splitter (05-002603)
7.3.1 Description
The 3dB Splitter/Combiner used is a device for accurately matching two or more RF signals to
single or multiple ports, whilst maintaining an accurate 50Ω load to all inputs/outputs and
ensuring that the VSWR and insertion losses are kept to a minimum. Any unused ports will be
terminated with an appropriate 50Ω load.
7.3.2 Technical Specification
PARAMETER SPECIFICATION
Frequency range: 380 - 520 MHz
Bandwidth: 140 MHz
Inputs: 1
Outputs: 2
Insertion loss: 3.5 dB (typical)
Isolation: >18 dB
Return Loss (VSWR) – Input: Better than 1.3:1
Return Loss (VSWR) – Output: Better than 1.3:1
Impedance:
50 ς
Power Rating – splitter: 20 Watts
Power Rating – combiner: 0.5 Watt
Connectors: SMA female
Size: 54 x 44 x 21 mm (including
connectors)
Weight: 200 gm (approximately)
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7.4 1 Watt 3dB Broadband Splitter (05-002901)
7.4.1 Description
The 1 Watt, 3dB Splitter/Combiner used is a device for accurately matching two or more RF
signals to single or multiple ports, whilst maintaining an accurate 50Ω load to all inputs/outputs
and ensuring that the VSWR and insertion losses are kept to a minimum. Any unused ports will
be terminated with an appropriate 50Ω load.
7.4.2 Technical Specification
PARAMETER SPECIFICATION
Frequency Range: 100 - 520 MHz
Bandwidth: 380 MHz
Inputs: 1
Outputs: 2
Insertion Loss: 3.5 dB (typical)
Isolation: >18 dB
Return Loss (VSWR) – Input: Better than 1.3:1
Return Loss (VSWR) – Output: Better than 1.3:1
Impedance:
50 ς
Power Rating – Splitter: 20 Watts
Power Rating – Combiner: 1.0 Watt
Connectors: SMA female
Size: 54 x 44 x 21 mm (including
connectors)
Weight: 200 gm (approximately)
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7.5 Crossband Coupler (07-005701)
7.5.1 Description
The purpose of a crossband coupler is to either combine/split transmission signals from
different parts of the frequency spectrum.
The crossband coupler fitted here, is the means by which the separate VHF and UHF
frequency band signals are mixed to form a composite RF signal.
It basically comprises of a 3 port device, two filters, one a low pass the other a high pass, that
are then mixed and fed to a common output. The couplers are built into a machined
aluminium casing having a centre screening wall between the filter sections and lid secured by
screws at frequent intervals over its perimeter to obtain a tight seal and to ensure linearity and
stability of response.
7.5.2 Technical Specification
PARAMETER SPECIFICATION
Passband
250MHz: 70-250MHz
380MHz: 380-960MHz
Power Rating: 50 Watts (CW)
Number of Input ports: 2
Number of Output ports: 1
Insertion loss: 0.5 dB
> 50 dB 70-250MHz
Isolation:
> 50 dB 380-960MHz
(15 dB typical return loss 500-960)
Impedance: 50
Connectors: SMA- female
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7.6 Crossband Coupler (07-005705)
7.6.1 Description
The purpose of a crossband coupler is to either combine/split transmission signals from
different parts of the frequency spectrum.
It basically comprises of a 3 port device, two filters, one a low pass, the other a high pass
feeding a common output. In this case, a VHF spectrum signal source is to be combined with a
band 2 FM source, (many other combinations are also possible). The couplers are built into a
machined aluminium casing having a centre screening wall between the filter sections and lid
secured by screws at frequent intervals over its perimeter to obtain a tight seal and to ensure
linearity and stability of response.
7.6.2 Technical Specification
PARAMETER
Passband
250 MHz:
380 MHz:
70-250MHz
380-960 MHz
SPECIFICATION
Power Rating: 50 Watts (CW)
Number of Input ports: 2
Number of Output ports: 1
Insertion loss: 0.5 dB
> 50 dB 70-250MHz
Isolation:
> 50 dB 380-960MHz
(15 dB typical Return loss 500-960)
Impedance: 50 ohm
Connectors: SMA- female
¼Watt 0- -30 & 0-15dB Switched Attenuator (10-000701 & 10-000901)
7.7
7.7.1 General Application
In many practical applications for Cell Enhancers etc., the gain in each path is found to be
excessive. Therefore, provision is made within the unit for the setting of attenuation in each
path, to reduce the gain.
7.7.2 Switched Attenuators
The AFL switched attenuators are available in two different types; 0 – 30dB in 2 dB steps, or 0
– 15dB in 1 dB steps. The attenuation is simply set using the four miniature toggle switches on
the top of each unit. Each switch is clearly marked with the attenuation it provides, and the total
attenuation in line is the sum of the values switched in. They are designed to maintain an
accurate 50 impedance over their operating frequency at both input and output.
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Page 50
7.8 Low Noise Amplifiers (11-007302 & 11-007402)
7.8.1 Description
The low noise amplifiers used are double stage solid-state low-noise amplifiers. Class A circuitry is
used in the units to ensure excellent linearity over a very wide dynamic range. The two active
devices are very moderately rated to provide a long trouble-free working life. There are no
adjustments on these amplifiers, and in the unlikely event of failure then the entire amplifier should
be replaced.
7.8.2 Technical Specification, 11-007302
PARAMETER SPECIFICATION
Frequency range: 380-500MHz
Bandwidth: <140MHz
Gain: 20-22dB
1dB Compression Point: +23.5dB (typical)
3rd order intercept: +36dB (typical)
Input/Output return loss: >20dB
Noise figure: <1.3dB
Connectors: SMA female
Supply: 200-230mA @ 24V DC
Temperature range:
operational: -10°C to +60°C
storage: -20°C to +70°C
Weight: 0.38kg
Size: 90 x 55 x 30.2 (case only)
7.8.3 Technical Specification, 11-007402
PARAMETER SPECIFICATION
Frequency range: 380-500MHz
Bandwidth: <140MHz
Gain: 30-32dB
1dB Compression Point: +22dBm (typical)
3rd order intercept: +34-35dBm (typical)
Input/Output return loss: >20dB
Noise figure: <1.3dB
Connectors: SMA female
Supply: 300-330mA @ 24V DC
Weight: 0.38kg
Size: 90 x 55 x 30.2 (case only)
Temperature range:
operation: -10°C to +60°C
storage: -20°C to +70°C
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Page 51
7.8.4 LNA ‘D’ Connector Pin-out details
Connector pin Signal
1 +Ve input (10-24V)
2 GND
3 Alarm Relay O/P bad
4 Alarm Relay common
5 Alarm Relay good
6 No connection
7 TTL voltage set
8 TTL alarm/0V (good)
9 O/C good/0V bad
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7.9 1Watt Low Power Amplifier (11-007901)
7.9.1 Description
This amplifier is dedicated to be a 1.0 W driver from 380 MHz to 470 MHz. It is a 2 stage
amplifier where each stage is in balanced configuration. It demonstrates very high linearity and
good input/output VSWR. There is a Current Fault Alarm Function, which indicates failure of
each one of the RF transistors by various alarm output options. The amplifier is housed in an
aluminium case (Alocrom 1200 finish) with SMA connectors for the RF input/output and a
9way D-type connector for DC and alarm outputs.
7.9.2 Technical Specifications
PARAMETER SPECIFICATION
Frequency range: 380-470MHz
Small signal gain: 37.5dB
Gain flatness: ±0.5dB
Gain vs. temperature: 1.5dB
Temperature range:
operational:
storage:
-10°C to +60°C
-20°C to +70°C
Input/output return loss: 18dB
Maximum output power: 30.4dBm (@ 1dB comp. point)
OIP3: 43dBm
Supply voltage: 10-15V DC
Current consumption: 780mA (typical)
Noise Figure: <1.75dB
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7.10 5Watt Medium Power TETRA Amplifier (12-021601)
7.10.1 Description
The power amplifier fitted to this unit is a multi-stage, solid state power amplifier. Class A
circuitry is employed throughout the device to ensure excellent linearity over a wide dynamic
frequency range. All the semi-conductor devices are very conservatively rated to ensure low
device junction temperatures and a long, trouble free working lifetime.
The power amplifier should require no maintenance over its operating life. Under no
circumstances should the cover be removed or the side adjustments disturbed unless it is
certain that the amplifier has failed; since it is critically aligned during manufacture and any realignment will require extensive test equipment.
7.10.2 Technical Specification
PARAMETER SPECIFICATION
Frequency range: 380-470MHz (as required)
Bandwidth: 10-40MHz (typical, tuned to spec.)
Maximum RF output: >5Watts
Gain: >30dB
1dB compression point: +37.5dBm
3rd order intercept point: +50dBm
VSWR: better than 1.5:1
Connectors: SMA female
Supply: 1.9Amps @ 12V DC
Weight: 1kg (excluding heatsink)
Temperature range:
operational:
storage:
-10°C to +60°C
-20°C to +70°C
7.10.3 PA 7-Way Connector Pin-outs
Connector Pin Signal
A1 (large pin) +12V DC
A2 (large pin) GND
1 Alarm relay common
2 TTL alarm/0V good
3 Alarm relay contact (bad)
4 Alarm relay contact (good)
5 O/C good/0V bad (TTL)
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7.10.4 PA Connector Pin-Outs
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7.11 10 & 20W Power Amplifiers (12-016302 & 12-016301)
7.11.1 Description
These amplifiers are Class A 20W power amplifiers operating from 380MHz to 470MHz in
a 1 stage balanced configuration. It demonstrates a very high linearity and a very good
input/output return loss (RL). They have a built in Current Fault Alarm Function.
They are housed is an aluminium case (Alocrom 1200 finish) with SMA connectors for the
RF input/output and a D-Type connector for the power supply and the Current Fault Alarm
Function. Note the large diameter DC power input pins (1 & 2) fitted to reduce voltdrop/arcing.
7.11.2 Technical Specification
PARAMETER SPECIFICATION
Frequency range: 380-470MHz
Small signal gain: 23dB
Gain flatness: ±1.7dB
I/O Return loss: >18dB
1dB compression point:
43dBm (12-016301)
40.5dBm (12-016302)
OIP3: 54dBm (12-016301)
53dBm (12-016302)
Supply voltage: 24V DC
Supply current:
3.7Amps (12-016301)
2.5Amps (12-016301)
Temperature range operational: -10°C to +60°C
storage: -20°C to +70°C
Weight: <2kg (no heatsink)
7.11.3 PA ‘D’ Connector Pin-out details
Connector pin Signal
1 (large pin) +Ve input (10-24V)
2 (large pin) GND
3 Alarm Relay O/P bad
4 Alarm Relay common
5 Alarm Relay good
6 No connection
7 TTL voltage set
8 TTL alarm/0V (good)
9 O/C good/0V bad
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7.12 D.I.P Channel Control Module (17-002101)
7.12.1 Description
The operating frequency for each channel in each repeater is programmed by 16 DIL (Dual
In Line) switches. The programming switches are mounted in the Channel Control Module.
The Channel Selectivity Modules are connected to the Channel Control Module via multiway ribbon cables.
Adjacent to the DIL switches for each channel is a toggle switch to turn on and off
individual channels as required. A green LED indicates the power status of each channel.
A red LED shows the alarm condition for each channel. An illuminated alarm LED
indicates that the synthesiser has not achieved phase lock and that the module is disabled.
There is a problem which requires investigation, often a frequency programmed outside the
operating frequency range.
The following information is necessary before attempting the programming procedure.
1) operating frequency
2) synthesiser channel spacing (step size)
3) synthesiser offset (IF)
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7.12.2 Programming Procedure
Check that the required frequency falls within the operational frequency limits of the Cell
Enhancer.
For each channel required, subtract the synthesiser offset from the required operating
frequency and record the resulting local oscillator frequency.
Divide each local oscillator frequency by the channel spacing and check that the result is an
integer (i.e: no remainder).
If the synthesiser division ratio is not an integer value, check the required operational
frequency and repeat the calculation checking for mistakes.
Convert the required local oscillator frequency to synthesiser programming switch state
patterns according to the following table.
7.12.3 12.5kHz step size switch functions
Switch
Number
Synthesiser offset added when switch in UP
position
1 +12.5kHz
2 +25kHz
3 +50kHz
4 +100kHz
5 +200kHz
6 +400kHz
7 +800kHz
8 +1.6MHz
9 +3.2MHz
10 +6.4MHz
11 +12.8MHz
12 +25.6MHz
13 +51.2MHz
14 +102.4MHz
15 +204.8MHz
16 +409.6MHz
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7.12.4 25kHz step size switch functions
Switch
Number
Synthesiser offset added when switch in UP
position
1 +25kHz
2 +50kHz
3 +100kHz
4 +200kHz
5 +400kHz
6 +800kHz
7 +1.6MHz
8 +3.2MHz
9 +6.4MHz
10 +12.8MHz
11 +25.6MHz
12 +51.2MHz
13 +102.4MHz
14 +204.8MHz
15 +409.6MHz
16 +819.2MHz
7.12.5 Programming Example
Frequency required: 454.000MHz
Channel spacing: 12.5kHz
Synthesiser offset: -21.4MHz
The Local Oscillator frequency is therefore:
454.000 – 21.4 = 432.600MHz
Dividing the LO frequency by the channel spacing of 0.0125MHz:
432.600 = 34608
0.0125
This is an integer value, therefore it is OK to proceed.
Local Oscillator
Frequency
432.600 MHz
Switch settings
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
1 0 0 0 0 1 1 1 0 0 1 1 0 0 0 0
Switch setting: 0 = switch DOWN (ON, frequency ignored )
1 = switch UP (OFF, frequency added )
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7.12.6 17-002101 Controller Module DIP Switch Connector Data
IDC PIN 25-way Connector Function (12.5kHz steps)
1 13 Freq. bit 1 (12.5kHz)
2 25 Freq. bit 2 (25kHz)
3 12 Freq. bit 3 (50kHz)
4 24 Freq. bit 4 (100kHz)
5 11 Freq. bit 5 (200kHz)
6 23 Freq. bit 6 (400kHz)
7 10 Freq. bit 7 (800kHz)
8 22 Freq. bit 8 (1.6MHz)
9 9 Freq. bit 9 (3.2MHz)
10 21 Freq. bit 10 (6.4MHz)
11 8 Freq. bit 11 (12.8MHz)
12 20 Freq. bit 12 (25.6MHz)
13 7 Freq. bit 13 (51.2MHz)
14 19 Freq. bit 14 (102.4MHz)
15 6 Freq. bit 15 (204.8MHz)
16 18 Freq. bit 16 (409.6MHz)
17 5 Module alarm
18 17 Gain bit 1
19 4 Gain bit 2
20 16 Gain bit 3
21 3 Gain bit 4
22 15 +5V
23 2 0V
24 14 Switched 12V
25 1 0V
26 --- ---
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7.12.7 Drg. N. 17-002190, DIP Switch Module Controller Outline Drawing
F
UNLESS OTHERWISE STATED
BM
AL L DIMENSIONS ARE IN mm
DRAWN
CHKD
DJL
1 23456789
APPD
DATE
11/11/94
JD
E
D
C
B
A
12
FINISH : ALOCROM 1200
MATERIAL : FRONT PANEL-ALUMINIUM ALLOY
NO DECIMAL PL ACE ± 1mm
ONE DECIMAL PLACE ± 0.3 mm
TWO DECIMAL PL ACES ± 0.1mm
NTS
Fax : 01494 777002
Tel : 01494 777000
CUSTOMER D RAW ING.No
TO LERANCES
SCALE
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WR I TING
BY AERIAL FACILITIES LTD.
Aerial Facilities Limited
England
THIRD AN GLE PROJECTION
POW ER
16 1
87563421
ALAR M
OFF
ON
POW ER
16 1
8
SWITCH 16
7654321
ALAR M
OFF
ON
POW ER
16 1
8
7654321
ALAR M
OFF
ON
POW ER
16 1
8
7654321
ALAR M
OFF
ON
ON.
PROGRAM
CHANNE L 1
87563421
ON.
PROGRAM
CHANNE L 2
87563421
ON.
PROGRAM
CHANNE L 3
87563421
ON.
PROGRAM
CHANNE L 4
654312
78
ON.
ON.
ON.
ON.
SWITCH 1
3
4
5
CHANNEL CO NTRO L
MODUL E
6
A erial F acilities
TITLE
Limited
CHANNELISED CELL ENHANCER,CHANNEL
CONTROL MODULE,OUTLINE
3A
2A
1
2
CR0779
PRODUCTION ISSUE(CR0629)
ECN2646
PRODUCTION ISSUE (CR0962)
17-002190
ISSUE
11/11/94
10/4/96
25/1/99
1/10/02
SEW
DJL
DJL
BYDATEDESCRI PTIONNo
3
A
F
DJL
E
D
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A
60 of 72
7
89
Page 61
7.13 Channel Selective Modules (17-003033 & 17-010803)
7.13.1 Description
The channel selectivity module is employed when the Cell Enhancer requirement dictates that
very narrow bandwidths (single operating channels), must be selected from within the operating
passband. One channel selectivity module is required for each channel.
The Channel Selectivity Module is an Up/Down frequency converter that mixes the incoming
channel frequency with a synthesised local oscillator, so that it is down-converted to an
Intermediate Frequency (IF) in the upper HF range. An eight pole crystal filter in the IF
amplifier provides the required selectivity to define the operating passband of the Cell Enhancer
to a single PMR channel. The same local oscillator then converts the selected IF signal back to
the channel frequency.
Selectivity is obtained from a fixed bandwidth block filter operating at an intermediate
frequency (IF) in the low VHF range. This filter may be internal to the channel selectivity
module (Crystal or SAW filter) or an externally mounted bandpass filter, (LC or Helical
Resonator). Various IF bandwidths can therefore be accommodated. A synthesized Local
Oscillator is employed in conjunction with high performance frequency mixers, to translate
between the signal frequency and IF.
The operating frequency of each channel selectivity module is set by the programming of
channel selectivity module frequencies and is achieved digitally, via hard wired links, banks of
DIP switches, or via an onboard RS232 control module, providing the ability to remotely set
channel frequencies.
Automatic Level Control (ALC) is provided within each channel selectivity module such that
the output level is held constant for high level input signals. This feature prevents saturation of
the output mixer and of the associated amplifiers.
Alarms within the module inhibit the channel if the synthesised frequency is not locked. The
synthesiser will not usually go out of lock unless a frequency far out of band is programmed.
The channel selectivity module is extremely complex and, with the exception of channel
frequency programming within the design bandwidth, it cannot be adjusted or repaired without
extensive laboratory facilities and the necessary specialised personnel. If a fault is suspected
with any channel selectivity module it should be tested by substitution and the complete, suspect
module should then be returned to AFL for investigation. The channel selective modules fitted
to the VHF cell enhancers in the Weehawken system are all hard-wired and therefore not
adjustable, however, the modules fitted to the UHF and 800MHz enhancers have DIP switch
controller modules fitted, allowing the set frequency to be changed on site. There is no
functionality to change the frequencies remotely.
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7.13.2 Drg. N. 17-003080, Generic Channel Module Block Diagram
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7.14 12 & 24V Relay Boards (20-001601 & 20-001602)
7.14.1 Description
The General Purpose Relay Board allows the inversion of signals and the isolation of circuits.
It is equipped with two dual pole change-over relays RL1 and RL2, with completely isolated
wiring, accessed via screw terminals.
Both relays are provided with polarity protection diodes and diodes for suppressing the
transients caused by "flywheel effect" which can destroy switching transistors or induce spikes
on neighbouring circuits. It’s common use is to amalgamate all the alarm signals into one,
volts-free relay contact pair for the main alarm system.
Note that the board is available for different voltages (12 or 24V) depending on the type of
relays fitted at RL1 and RL2.
7.14.2 Technical Specification
PARAMETER SPECIFICATION
Operating voltage: 8 to 30V (floating earth)
Alarm Threshold: Vcc - 1.20 volt +15%
Alarm output relay contacts:
Max. switch current: 1.0Amp
Max. switch volts: 120Vdc/60VA
Max. switch power: 24W/60VA
Min. switch load: 10.0µA/10.0mV
Relay isolation: 1.5kV
Mechanical life:
>2x107 operations
Relay approval: BT type 56
Connector details: Screw terminals
Temperature range
operational: :-10°C to +55°C
storage: :-40°C to +70°C
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7.15 12 & 24V Single Relay Board (80-008901 & 80-008902)
7.15.1 Description
The General Purpose Relay Board allows the inversion of signals and the isolation of
circuits. It is equipped with a single dual pole change-over relay RL1, with completely
isolated wiring, accessed via a 15 way in-line connector.
The relay is provided with polarity protection diodes and diodes for suppressing the
transients caused by "flywheel effect" which can destroy switching transistors or induce
spikes on neighbouring circuits. It’s common use is to amalgamate all the alarm signals into
one, volts-free relay contact pair for the main alarm system.
Note that the board is available for different voltages (12 or 24V) depending on the type of
relay fitted at RL1.
7.16 24V, 400W Power Supply Pack (96-300054)
7.16.1 Description
The power supply unit is a switched-mode type capable of supplying 24V DC at 17.0Amps
continuously. Equipment of this type typically requires approximately 10.0 Amps at 24V DC,
so the PSU will be used conservatively ensuring a long operational lifetime.
No routine maintenance of the PSU is required. If a fault is suspected, then the output voltage
from the power supply may be measured on its output terminals. This is typically set to 24.5V
using the multi-turn potentiometer mounted close to the DC output studs on the PSU PCB.
All the PSU’s used in AFL Cell Enhancers are capable of operation from either 110 or 220V
nominal AC supplies. The line voltage is sensed automatically, so no adjustment or link
setting is needed by the operator.
7.16.2 Technical Specification
AC Input Supply
Voltages:
110 or 220V nominal
90 to 132 or 180 to 264V (absolute limits)
Frequency: 47 to 63Hz
DC Output Supply:
Voltage:
24V DC (nominal)
20 to 28V (absolute limits)
Maximum current: 17A
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8. INSTALLATION
When this equipment is initially commissioned, please use the equipment set-up record sheet in
Appendix A. This will help both the installation personnel and AFL should these figures be
needed for future reference or diagnosis.
8.1 General Remarks
The size and weight of the equipment racks mean that they represent a significant topple hazard
unless they are securely bolted to the floor though the mounting holes in the base of the unit. In
the interests of safety this should be done before any electrical or RF connections are made.
The equipment must be located on a flat, level surface that is made from a material suitable for
bearing the weight of the rack assembly. If the installer is in any doubt about the suitability of a
site it is recommended that he consult with an appropriately qualified Structural Engineer.
It is important in determining the location of the rack within the room that space is allowed for
access to the front and rear of the equipment. To enable maintenance to be carried out, the
doors must be able to fully open.
The location must be served with a duct to allow the entry of cables into the rack.
The mains power supply is connected to the terminal strip located on the bulkhead at the rear of
the equipment at floor level. It is recommended that the connection is made by a qualified
electrician, who must satisfy himself that the supply will be the correct voltage and of sufficient
capacity.
All electrical and RF connection should be completed and checked prior to power being
applied for the first time.
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8.2 RF Connections
All RF connections are made to the cable termination, located on the bulkhead at the rear of the
equipment at floor level. Care must be taken to ensure that the correct connections are made
with particular attention made to the base station TX/RX ports. In the event that the base
transmitter is connected to the RX output of the rack, damage to the equipment will be done if
the base station transmitter is then keyed.
Ensure that connections are kept clean and are fully tightened.
8.3 Commissioning
Once all connections are made the equipment is ready for commissioning.
To commission the system the test equipment detailed in Section 9.2 will be required.
Using the system diagrams and the end-to-end test specification, the equipment should be
tested to ensure correct operation. Typical RF levels that are not listed in the end-to-end
specification, such as input levels to the fibre transmitters are detailed in the maintenance
section of this manual.
On initial power up the system alarm indicators on the front panels of the equipment should be
checked. A red LED illuminated indicates a fault in that particular shelf that must be
investigated before proceeding with the commissioning. A green LED on each shelf
illuminates, to indicate that the power supply is connected to the shelf.
In the event that any part of the system does not function correctly as expected, check all
connections to ensure that they are to the correct port, that the interconnecting cables are not
faulty and that they are tightened. The majority of commissioning difficulties arise from
problems with the interconnecting cables and connectors.
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9. MAINTENANCE
9.1 Fault Finding
9.1.1 Quick Fault Checklist
All AFL equipment is individually tested to specification prior to despatch. Failure of this type
of equipment is not common. Experience has shown that a large number of fault conditions
relating to tunnel installations result from simple causes often occurring as result of
transportation, unpacking and installation. Below are listed some common problems which have
resulted in poor performance or an indicated non-functioning of the equipment.
• Mains power not connected or not switched on.
• External connectors not fitted or incorrectly fitted.
• Internal connectors becoming loose due to transport vibration.
• Wiring becoming detached as a result of heavy handling.
• Input signals not present due to faults in the aerial and feeder system.
• Base transmissions not present due to fault at the base station.
• Modems fitted with incorrect software configuration.
• Changes to channel frequencies and inhibiting channels.
• Hand held radio equipment not set to repeater channels.
• Hand held radio equipment not set to correct base station.
9.1.2 Fault Isolation
In the event that the performance of the system is suspect, a methodical and logical approach to
the problem will reveal the cause of the difficulty. The System consists of modules fitted in a
wall-mounted, environmentally protected enclosure.
Transmissions from the main base stations are passed though the system to the mobile radio
equipment; this could be a handheld radio or a transceiver in a vehicle. This path is referred to
as the downlink. The return signal path from the mobile radio equipment to the base station is
referred to as the uplink.
The first operation is to check the alarms of each of the active units and determine that the
power supplies to the equipment are connected and active.
This can be achieved remotely (via CEMS, the RS232 C
ystem, if fitted), or locally with the front panel LED’s. The green LED on the front panel
S
overage Enhancement Management
should be illuminated, while the red alarm indicator should be off. If an Alarm is on, then that
individual module must be isolated and individually tested against the original test
specification.
The individual amplifier units within the shelf have a green LED showing through a hole in
their piggy-back alarm board, which is illuminated if the unit is working correctly. If an
amplifier is suspect, check the DC power supply to the unit. If no other fault is apparent use a
spectrum analyser to measure the incoming signal level at the input and then after reconnecting
the amplifier input, measure the output level. Consult with the system diagram to determine the
expected gain and compare result.
In the event that there are no alarms on and all units appear to be functioning it will be
necessary to test the system in a systematic manner to confirm correct operation.
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9.1.3 Downlink
Confirm that there is a signal at the expected frequency and strength from the base station. If
this is not present then the fault may lay outside the system. To confirm this, inject a downlink
frequency signal from a known source at the 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.
9.1.4 Uplink
Testing the uplink involves a similar procedure to the downlink except that the frequencies
used are those transmitted by the mobile equipment.
9.1.5 Checking service
Following the repair of any part of the system it is recommended that a full end-to-end test is
carried out in accordance with the test specification and that the coverage is checked by survey.
It is important to bear in mind that the system includes a radiating cable network and base
stations that may be faulty or may have been damaged.
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9.1.6 Fault repair
Once a faulty component has been identified, a decision must be made on the appropriate
course to carry out a repair. A competent engineer can quickly remedy typical faults such as
faulty connections or cables. The exceptions to this are cable assemblies connecting bandpass
filter assemblies that are manufactured to critical lengths to maintain a 50-ohm system. Care
should be taken when replacing cables or connectors to ensure that items are of the correct
specification. The repair of component modules such as amplifiers and bandpass filters will not
usually be possible in the field, as they frequently require specialist knowledge and test
equipment to ensure correct operation. It is recommended that items of this type are replaced
with a spare unit and the faulty unit returned to AFL for repair.
9.1.7 Service Support
Advice and assistance with maintaining and servicing this system are available by contacting
Aerial Facilities Ltd.
NOTE
Individual modules are not intended to be repaired on site and attempts at repair will
invalidate active warranties. Company policy is that individual modules should be
repaired by replacement. Aerial Facilities Ltd maintains a high level of stock of most
modules which can usually be despatched at short notice to support this policy.
9.2 Tools & Test Equipment
The minimum tools and test equipment needed to successfully service this AFL 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.
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9.3 Care of Modules
9.3.1 General Comments
Many of the active modules contain semiconductor devices utilising MOS technology, which
can be damaged by electrostatic discharge. Correct handling of such modules is mandatory to
ensure their long-term reliability.
To prevent damage to a module, it must be withdrawn/inserted with care. The module may have
connectors on its underside, which might not be visible to the service operative.
9.3.2 Module Removal (LNA’s, general procedure):
The following general instructions should be followed to remove a module:
1 Remove power to the unit
2 Remove all visible connectors (RF, DC & alarm)
3 Release module retaining screws.
4 Slowly but firmly, pull the module straight out of its position. Take care not to twist/turn the
module during withdrawal. (When the module is loose, care may be needed, as there may be
concealed connections underneath).
9.3.3 Module Replacement (general):
1 Carefully align the module into its location then slowly push the module directly straight
into its position, taking care not to twist/turn it during insertion.
2 Reconnect all connectors, RF, alarm, power etc.,(concealed connectors may have to be
connected first).
3 Replace retaining screws (if any).
4 Double-check all connections before applying power.
9.3.4 Power Amplifiers
1) Remove power to the unit. (Switch off @ 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)
If alarm board removal is not required, go to step 5.
4) There is (usually) a plate attached to the alarm board which fixes it to the amplifier, remove
its retaining screws and the alarm board can be withdrawn from the amplifier in its entirety.
On certain types of amplifier the alarm board is not
mounted on a dedicated mounting plate;
in this case it will have to firstly be removed by unscrewing it from the mounting pillars, in
most cases, the pillars will not have not have to be removed before lifting the amplifier.
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5) If the amplifier to be removed has a heatsink attached, there may be several different ways it
can have been assembled. The most commonly used method, is screws through the front of
the heatsink to threaded screw holes (or nuts and bolts), into the amplifier within the main
case. If the heatsink is mounted on the rear of the main case (e.g., against a wall in the case
of wall mounted enclosures), then the fixing method for the heatsink will be from within the
case, (otherwise the enclosure would have to be removed from the wall in order to remove
the heatsink).
When the heatsink has been removed, the amplifier may be unscrewed from the main casing
by its four corner fixings and gently withdrawn.
Fitting a new power amplifier module will be the exact reverse of the above.
Note: Do not forget to apply fresh heatsink compound to the heatsink/main case joint
and also between the amplifier and the main case.
9.3.5 Low Power Amplifier Replacement
1 Disconnect the mains power supply and disconnect the 24V dc supply connector for the
LPA.
2 Disconnect the RF input and output cables from the LPA.
3 Disconnect the alarm connector.
4 Remove the alarm monitoring wires from (D type connector) pins 9 and 10.
5 Remove the LPA module by removing the four retaining screws, replace with a new LPA
module and secure it with the screws.
6 Connect the RF cables to the LPA input and output connectors. Reconnect the wires to the
alarm board connector pins 9 and 10.
7 Reconnect the DC supply connector and turn the mains switch on.
Note: Tighten SMA connectors using only a dedicated SMA torque spanner. If SMA
connectors are over-tightened, irreparable damage will occur. . Do not use adjustable pliers
to loosen/tighten SMA connectors.
Also take care not to drop or knock the module as this can damage (or misalign in the case
of tuned passive modules) sensitive internal components. Always store the modules in an
environmentally friendly location
9.3.6 Module Transportation:
To maintain the operation, performance and reliability of any module it must be stored and
transported correctly. Any module not installed in a whole system must be kept in an anti-static
bag or container. These bags or containers are normally identified by being pink or black, and
are often marked with an ESD label. Any module sent back to AFL for investigation/repair must
be so protected. Please contact AFL’s quality department before returning a module.
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APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS
GENERAL INFORMATION
Site Name: Client Name:
Date: AFL Equip. Model N.
ANTENNA SYSTEMS
A - Service Antenna
B – Donor Antenna
C – Service Feeder
D – Donor Feeder
G – Input signal level from donor BTS
Parameter Comments Value
Input signal level (G)
CE max. o/p power (E)
Service antenna gain (A)
Service antenna feeder loss (C)
Effective radiated power (ERP)
Model Gain Azimuth Comments
Type Loss Length Comments
INITIAL PARAMETERS
E – CE Output Power
F – Antenna Isolation
Operating Voltage V
DOWNLINK CALCULATIONS
dBm
dBm
Gain setting
Isolation required (Gain + 10dB) dB
Attenuator setting CE gain-gain setting dB
E - G
dB
dB
E+A-C
dBm
dB
dBm
dBm
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)
Gain setting dB
Required isolation dB
Donor antenna gain (B)
Donor antenna feeder loss (D)
Effective radiated power (ERP)
Attenuator setting (CE gain-gain setting) dB
dBm
dB
dB
E+B-D
dBm
dB
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