9 Channel, Channelised
UHF Cell Enhancer
Maintenance Handbook
For
Terry Consulting
AFL Works Order N.: Q10965
AFL product part N.: 50-025301
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
1 of 69
Table of Contents
AMENDMENT LIST RECORD SHEET .................................................................................................5
INTRODUCTION ....................................................................................................................................... 6
Scope...........................................................................................................................................................................6
Purpose.......................................................................................................................................................................6
Glossary of Terms .....................................................................................................................................................7
Key to AFL RF Module Drawing Symbols.............................................................................................................8
1. SAFETY CONSIDERATIONS ....................................................................................................... 9
1.1 Earthing of Equipment................................................................................................................................9
1.2 Electric Shock Hazard .................................................................................................................................9
1.3 RF Radiation Hazard...................................................................................................................................9
1.4 Chemical Hazard........................................................................................................................................10
1.5 Emergency Contact Numbers ...................................................................................................................10
2. OVERVIEW/SYSTEM DESCRIPTION .....................................................................................11
3. SPECIFICATION ..........................................................................................................................12
3.1 9 Channel Channelised Cell Enhancer 50-025301 Parts Lists ...............................................................12
3.1.1 VTA-Downlink Duplexer Shelf 50-025302 Parts List ............................................................................12
3.1.2 VTA Downlink Amplifier Shelf 50-025303 Parts List............................................................................13
3.1.3 VTA Downlink Channel Shelf 50-025304 Parts List ..............................................................................14
3.1.4 VTA Uplink Duplexer Shelf 50-025305 Parts List..................................................................................14
3.1.5 VTA Uplink Amplifier Shelf 50-025306 Parts List.................................................................................15
3.2 Technical Specification ..............................................................................................................................16
3.3 Mechanical Specification ...........................................................................................................................17
4. SYSTEM DRAWINGS ..................................................................................................................18
4.1 Drg. Nō. 50-025381, Channelised CE System Diagram ..........................................................................18
5. SUB-UNIT MODULES .................................................................................................................. 19
5.1 VTA Downlink Duplexer Shelf 60-025302 (4U chassis)..........................................................................19
5.1.1 Bandpass Filters (02-011204 & 02-013401)............................................................................................19
5.1.1.1 Description.......................................................................................................................................19
5.1.1.2 Technical Specification (02-011204) ...............................................................................................19
5.1.1.3 Technical Specification (02-013401) ...............................................................................................19
5.2 VTA Downlink Amplifier Shelf (50-025303, 8U Chassis).......................................................................20
5.2.1 UHF 3dB Splitter (05-002603) ................................................................................................................20
5.2.1.1 Description.......................................................................................................................................20
5.2.1.2 Technical Specification ....................................................................................................................20
5.2.2 ¼Watt 0- -30dB Switched Attenuator (10-000701).................................................................................20
5.2.2.1 General Application .........................................................................................................................20
5.2.2.2 Switched Attenuators........................................................................................................................20
5.2.3 Low Noise Amplifier (11-006102) ..........................................................................................................21
5.2.3.1 Description.......................................................................................................................................21
5.2.3.2 Technical Specification ....................................................................................................................21
5.2.3.3 Drg. Nō. 11-006170, LNA Circuit Diagram (RF)............................................................................22
5.2.3.4 Drg. Nō. 11-006171, LNA Schematic Diagram (DC) ......................................................................23
5.2.4 Low Noise Amplifiers (11-007302 & 11-007402) ..................................................................................24
5.2.4.1 Description.......................................................................................................................................24
5.2.4.2 Technical Specification, (11-007302) ..............................................................................................24
5.2.4.3 Technical Specification (11-007402) ...............................................................................................24
5.2.4.4 Drg. Nō. 11-007302, LNA Assembly With Alarm Relay ..................................................................25
5.2.4.5 Drg. Nō. 11-007370, LNA RF Circuit Diagram...............................................................................26
5.2.4.6 Drg. Nō. 11-007371, LNA DC Wiring Diagram ..............................................................................27
5.2.5.7 Drg. Nō. 11-003971, LNA DC Circuit Diagram..............................................................................28
5.2.6 3 Stage Amplifier Alarm Boards (12-002201).........................................................................................29
5.2.6.1 Description.......................................................................................................................................29
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5.2.6.2 Technical Specification ....................................................................................................................30
5.2.6.3 Drg. Nō. 12-002201, 3 Stage Alarm Board Assembly Drawing & Parts List..................................31
5.2.6.4 Drg. Nō. 12-002270, 3 Stage Alarm Board Circuit Diagram..........................................................32
5.2.6.5 Generic Rack Shelf Enclosure Alarm Wiring Sketch .......................................................................33
5.2.7 450MHz 20W Power Amplifier (12-004201)..........................................................................................35
5.2.7.1 Description.......................................................................................................................................35
5.2.7.2 Technical Specification ....................................................................................................................35
5.2.7.3 Drg. Nō. 12-004201, PA General Assembly ....................................................................................36
5.2.7.4 Drg. Nō. 12-004270, PA Circuit Diagram.......................................................................................37
5.2.7.5 Drg. Nō. 12-004270C1, PA Parts List(1).........................................................................................38
5.2.7.6 Drg. Nō. 12-004270C2, PA Parts List(2).........................................................................................39
5.2.7.7 Drg. Nō. 12-003670, PA to Alarm Wiring Details...........................................................................40
5.2.8 Single DC/DC Converter (13-001702) ....................................................................................................41
5.2.8.1 Description.......................................................................................................................................41
5.2.8.2 Technical Specification ....................................................................................................................41
5.2.8.3 Drg. Nō. 13-001702, 12.8V Regulator Assembly Drawing & Parts List.........................................42
5.2.8.4 Drg. Nō. 13-001771, 12.8V Single Regulator Circuit Diagram ......................................................43
5.2.9 24V Single Relay Board (80-008902)......................................................................................................44
5.2.9.1 Description.......................................................................................................................................44
5.2.9.2 Drg. Nō. 80-008970, Single Relay Board Circuit Diagram.............................................................45
5.2.10 24V 410W Power Supply (96-300054)................................................................................................46
5.2.10.1 Description...................................................................................................................................46
5.2.10.2 Technical Specification ................................................................................................................46
5.3 VTA Downlink Channel Shelf (50-025304)..............................................................................................47
5.3.1 UHF 3dB Splitter (05-002603) See section 5.2.1 ....................................................................................47
5.3.2 4-Way Splitter (05-003401) .....................................................................................................................47
5.3.2.1 Description.......................................................................................................................................47
5.3.2.2 Technical Specification ....................................................................................................................47
5.3.3 Channel Control Module (17-002101).....................................................................................................48
5.3.3.1 Description.......................................................................................................................................48
5.3.3.2 Technical Specification ....................................................................................................................48
5.3.3.3 VHF/ UHF Programming Procedure ..............................................................................................49
5.3.3.4 VHF/ UHF Programming Example .................................................................................................50
5.3.4 Channel Selectivity Module (17-010601)................................................................................................51
5.3.4.1 Description.......................................................................................................................................51
5.3.4.2 Drg. Nō. 17-003080, Generic Channel Module Block Diagram .....................................................52
5.4 VTA Uplink Duplexer Shelf (50-025305, 4U Chassis) ............................................................................53
5.4.1 Bandpass Filters (02-011204 & 02-013401) See section 5.1.1................................................................53
5.5 VTA Uplink Amplifier Shelf (50-025306, 8U Chassis)............................................................................53
5.5.1 20Watt Class A Power Amplifier (12-016301)........................................................................................53
5.5.1.1 Description.......................................................................................................................................53
5.5.1.2 Technical Specification ....................................................................................................................53
5.5.1.3 Drg. Nō. 12-016370, 20W PA Circuit Diagram ..............................................................................54
5.5.2 Automatic Gain Control (17-001101, Det. & 17-001201, Atten.) ...........................................................55
5.5.2.1 Description.......................................................................................................................................55
5.5.2.2 Technical Specification ....................................................................................................................56
5.5.2.3 Drg. Nō. 17-001101, ACG Detector Assembly ................................................................................57
5.5.2.4 Drg. Nō. 17-001171, AGC Detector Circuit Diagram.....................................................................58
5.5.2.5 Drg. Nō. 17-001171C, AGC Detector Parts List .............................................................................59
5.5.2.6 Drg. Nō. 17-001201, AGC Attenuator Assembly Drawing ..............................................................60
5.5.2.7 Drg. Nō. 17-001270, AGC Attenuator Circuit Diagram..................................................................61
5.5.2.8 Drg. Nō. 17-001270C, AGC Attenuator Parts List ..........................................................................62
6. INSTALLATION............................................................................................................................ 63
6.1 Initial Installation Record .........................................................................................................................63
7. MAINTENANCE............................................................................................................................ 64
7.1 General Procedures....................................................................................................................................64
7.1.1 Basic Fault Finding ..................................................................................................................................64
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7.1.2 Downlink..................................................................................................................................................65
7.1.3 Uplink.......................................................................................................................................................65
7.1.4 Fault repair ...............................................................................................................................................65
7.1.5 Checking service ......................................................................................................................................66
7.1.6 Service Support ........................................................................................................................................66
7.2 Tools & Test Equipment............................................................................................................................66
7.3 Care of Modules .........................................................................................................................................67
7.3.1 General Comments...................................................................................................................................67
7.3.2 Module Removal (LNA’s, general procedure): .......................................................................................67
7.3.3 Module Replacement (general): ...............................................................................................................67
7.3.4 Power Amplifiers .....................................................................................................................................67
7.3.5 Low Power Amplifier Replacement.........................................................................................................68
7.3.6 Module Transportation:............................................................................................................................68
APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS............................................... 69
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Maintenance Handbook
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AMENDMENT LIST RECORD SHEET
Issue
Nō.
Date Incorporated
by
Page No.’s
Amended
Reason for new issue
1 04/08/2003 CMH 1st Issue
Document Ref:-50-025301HBKM
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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. 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.
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 ISO 9001: 1994 and to the
R&TTE Directive of the European Parliament. Copies of the relevant certificates and the
company Quality Manual can be supplied on application to the Quality Manager.
This document fulfils the relevant requirements of Article 6 of the R&TTE Directive.
Limitation of Information Notice
This manual is written for the use of technically competent operators/service persons. No
liability is accepted by AFL for use or misuse of this manual, the information contained
therein, or the consequences of any actions resulting from the use of the said information,
including, but not limited to, descriptive, procedural, typographical, arithmetical, or listing
errors.
Furthermore, AFL does not warrant the absolute accuracy of the information contained
within this manual, or it’s completeness, fitness for purpose, or scope.
AFL has a policy of continuous product development and enhancement, and as such,
reserves the right to amend, alter, update and generally change the contents, appearance and
pertinence of this document without notice.
All AFL products carry a twelve month warranty from date of shipment. The warranty is
expressly on a return to base repair or exchange basis and the warranty cover does not
extend to on-site repair or complete unit exchange.
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Maintenance Handbook
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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, remotely set by computer, or on-site programmable.
BTS Base Transceiver Station
C/NR Carrier-to-Noise Ratio
Downlink (D.L.) RF signals transmitted from the BTS and to the MS
Uplink (U.L.) RF signals transmitted from the MS to the BTS
EMC Electromagnetic Compatibility
GND Ground
DC Direct Current
AC Alternating Current
ID Identification Number
OIP3 Output Third Order Intercept Point = RF
+(C/I)/2
out
LED Light Emitting Diode
M.S. Mobile Station
N/A Not Applicable
N/C No Connection
NF Noise Figure
RF Radio Frequency
Rx Receiver
Tx Transmitter
S/N Serial Number
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Maintenance Handbook
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Key to AFL RF Module Drawing Symbols
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Maintenance Handbook
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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.
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
The AFL Channel Selective Cell Enhancer is a 2-way on-band repeater. Various models are
available to cover frequency bands from 50MHz to 3000MHz. Its main sphere of
applications is in urban areas where the topology is such that shadows occur in the
propagation pattern (for example within large buildings, conference centres and tunnels,
etc.,)
The Channel Selective Cell Enhancer is a 4-port device with direct connection to two
antennas, a highly directional Yagi or similar aligned towards the base site (for the nine
downlink channels) and a dedicated uplink antenna for the mobiles. The frequency bands
that are passed by the Cell Enhancer are set as per the specific customer requirements.
AFL manufacture a wide range of Cell Enhancers, configured for each customer's specific
requirements. Two basic physical variants are available, a rack mounted version to fit in a
standard 19" rack and an environmentally sealed wall mounted version which requires no
further enclosure.
The rack-mounted version is supplied in this instance in 5 shelf units. Each shelf/tray unit
containing active modules has a ‘D.C. on’ indicator on the front panel and the PSU (in the
downlink amplifier shelf) also has an ‘A.C. on’ indicator.
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3. SPECIFICATION
3.1 9 Channel Channelised Cell Enhancer 50-025301 Parts Lists
AFL Part N. Description Qty.
50-025302 VTA-Downlink Duplexer Shelf 1
50-025303 VTA-Downlink Amplifier Shelf 1
50-025304 VTA-Downlink Channel Shelf 1
50-025305 VTA-Uplink Duplexer Shelf 1
50-025306 VTA-Uplink Amplifier Shelf 1
3.1.1 VTA-Downlink Duplexer Shelf 50-025302 Parts List
02-011204 6P TETRA C/L FILT (NARROW) SMA 2
02-013401 6P CL FLTR(0.5 min BW)LARGE SMA ASSY 2
19-001021 4U 19" UNIT 400 DEEP CHASSIS + BKT 1
19-001024 4U 19" UNIT FRONT PANEL FAB 1
91-020004 N JACK PANEL UT-141 6
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3.1.2 VTA Downlink Amplifier Shelf 50-025303 Parts List
AFL Part N. Description Qty.
05-002603 UHF 3dB SPLITTER SMA 2
10-000701 1/4W0-30dB SWITCHED ATTENUATOR 2
11-006102 LNA 380-500MHz 1W WITH RELAY 2
11-007302 LNA. 380-500MHz 20dB (C/W RELAY) GA 1
11-007402 LNA. 380-500MHz 30dB (C/W RELAY) GA 3
12-002201 3 STAGE AMPLIFIER ALARM BOARD 2
12-002220 3 STAGE ALARM PCB COVER 2
12-004201 PWR AMP.450MHz 20W version CLASS A 2
13-001702 VOLTAGE REGULATOR Board 12V 2
50-012820 CCE RACK MOUNTED 8U CHASSIS 1
50-012822 CCE RACK MOUNTED LID 1
50-012825 CCE RACK MOUNTED HEATSINK BRACKET 4
50-027720 RACK MTD CHAN C.E. MODIFIED HEATSIN 2
80-008902 24V RELAY PCB ASSEMBLY 1
80-032320 10W PA HEATSINK (NEEDS 17-000526) 1
80-090822 C/E 8U FRONT PANEL, AFL (RAL7035) 1
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 8
91-100003 SMA PLUG ELBOW UT-141 4
91-130001 SMA ADAPT 'T' ALL FEMALE 3 GHZ 1
91-520003 POWER SWITCHD/FUSED MAINS INL. 1
91-600014 'D' 9 WAY SOCKET S/B (NON FILTERED) 2
91-600015 'D' 9 WAY PLUG S/B (NON FILTERED) 1
91-700017 ICD 15 WAY 0.1' CONNECTOR 5
93-540035 1K3 0.25W 1% RES MRS25 M:F 2
96-300054 24V 17A PSU 400W (XP BCC) 1
96-500005 DC INPUT FILTERS 1
96-700002 LED.GREEN 5mm SEALED IP66 1
96-700005 LED.RED 5mm SEALED IP66 1
97-400002 HANDLE TYPE H6803 4U.[ALLOY] 2
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3.1.3 VTA Downlink Channel Shelf 50-025304 Parts List
05-002603 UHF 3dB SPLITTER SMA 2
05-003302 4 WAY SPLITTER GSM 900MHz 4
05-003401 4 WAY SPLITTER LOW POWER 4
17-002101 CHANNEL CONTROL MODULE 3
17-003022 MODULE PATTERNED LEAVE 8
17-003023 SUBRACK SIDE PANEL 4
17-003024 SUBRACK REAR BRACKET 8
17-003025 BOTTOM MODULE GUIDE 8
17-003028 MODULE SQUARE LEAVE 8
17-003029 TOP MODULE GUIDE 8
17-010601 CHAN MOD 480MHz, 15kHz B/W 9
97-000002 BLACK MODULE CAGE RUNNER 16
97-600001 SUBRACK FRONT HORIZ 4
97-600002 SUBRACK M2.5 STD TAP 4
3.1.4 VTA Uplink Duplexer Shelf 50-025305 Parts List
02-011204 6P TETRA C/L FILT (NARROW) SMA 2
02-013401 6P CL FLTR(0.5 min BW)LARGE SMA ASSY 2
19-001021 4U 19" UNIT 400 DEEP CHASSIS + BKT 1
19-001024 4U 19" UNIT FRONT PANEL FAB 1
91-020004 N JACK PANEL UT-141 6
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3.1.5 VTA Uplink Amplifier Shelf 50-025306 Parts List
02-011204 6P TETRA C/L FILT (NARROW) SMA 1
02-013401 6P CL FLTR(0.5 min BW)LARGE SMA ASSY 1
10-000701 1/4W0-30dB SWITCHED ATTENUATOR 2
11-006102 LNA 380-500MHz 1W WITH RELAY 1
11-007302 LNA. 380-500MHz 20dB (C/W RELAY) GA 3
11-007402 LNA. 380-500MHz 30dB (C/W RELAY) GA 3
12-016301 PA 380-470MHz 20W CLASS A 1
13-001702 VOLTAGE REGULATOR Board 12V 2
13-003011 DC/DC CONVERTER 24-12V 8A PCB ASSY 1
17-001101 CELL ENHANCER AGC DETECTOR/AMP ASS 2
17-001201 C/E AGC UNIT ATTENUATOR ASSY 2
50-012820 CCE RACK MOUNTED 8U CHASSIS 1
50-012822 CCE RACK MOUNTED LID 1
50-012825 CCE RACK MOUNTED HEATSINK BRACKET 4
50-027720 RACK MTD CHAN C.E. MODIFIED HEATSIN 2
80-008902 24V RELAY PCB ASSEMBLY 1
80-032320 10W PA HEATSINK (NEEDS 17-000526) 1
80-090822 C/E 8U FRONT PANEL, AFL (RAL7035) 1
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 4
91-100003 SMA PLUG ELBOW UT-141 4
91-130001 SMA ADAPT 'T' ALL FEMALE 3 GHZ 1
91-520003 POWER SWITCHD/FUSED MAINS INL. 1
91-600014 'D' 9 WAY SOCKET S/B (NON FILTERED) 2
91-600015 'D' 9 WAY PLUG S/B (NON FILTERED) 1
93-540035 1K3 0.25W 1% RES MRS25 M:F 2
96-300054 24V 17A PSU 400W (XP BCC) 1
96-500005 DC INPUT FILTERS 1
96-700002 LED.GREEN 5mm SEALED IP66 1
96-700005 LED.RED 5mm SEALED IP66 1
97-400002 HANDLE TYPE H6803 4U.[ALLOY] 2
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3.2 Technical Specification
PARAMETER SPECIFICATION
Downlink Frequency Range: 491.4-492.2MHz
Single Downlink Channel Frequency: 485.5875MHz
Uplink Frequency Range: 488.4-489.6MHz
Single Uplink Frequency: 485.5875MHz
12.5kHz adjacent channel >20dBChannel Bandwidth selectivity:
25kHz adjacent channel >80dB
Number of Channels: 9
Number of ports: 4
RF Connectors: N type, female
Impedance: 50
VSWR: Better than 1.5:1
Sensitivity: 0.35 microvolts @ 12dB SINAD
Downlink Output Power: 40 Watts
Uplink Output Power: 20Watts
Uplink TOI: 50dBm
Downlink TOI: 50dBm
RF level per carrier: >+23dBm
Passband ripple: <±1.5dB
Noise figure: <6dB (@max gain)
Gain: 96dB
Gain adjustment: 0-30dB (in 2dB steps)
In band spurious: Better than –36dBm
Spurious up to 3GHz: Better than –90dBc
Input AC Supply: 120V AC
Consumption: 300 Watts
Alarms:
(Volt-free relay contacts)
Amplifiers
Channel phase unlock
PSU Failure
MTBF: 80,000 Hrs.
Housing: 19” Rack mounted
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
16 of 69
3.3 Mechanical Specification
PARAMETER SPECIFICATION
(excluding heatsinks, connectors, handles and feet)
Temperature Range:
RF Connectors: N type female
Environmental Protection: IP54
Height: Eurorack Shelves(1U=44.5mm)
Width: 19"Case Size:
Depth: <500mm
operational: -10°C to +55°C
storage: -40°C to +70°C
Weight: <15kg*
Humidity: 5 – 95% non-condensing
Case: Alocrom
Heatsinks: Matt blackFinish:
Handles: Alocrom
Unit supplied with suitable supply input
Supply Cable:
leads with connector and specified length
of cable (where appropriate)
* Note: Individual shelf weights unspecified.
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
17 of 69
4. SYSTEM DRAWINGS
4.1 Drg. N. 50-025381, Channelised CE System Diagram
A
02-013401
485.5875MHz
BANDPASS FILTER
11-006102
LNA LNA
11-007402
B
LCX
DOWNL INK
PA
12-004201
C
02-011204
491.4-492.2MHz
BANDPASS FILTER
CO MBI NER
05-002603
SPLITTER
05-002603
LNA
11-006102
D
PA
12-004201
E
50-025302
50-025303
F
G
H
2
A
50-025381
LCX
UPL INK
11 CHANNE L CHANNELIS ED CE (CSIC)
50-025305
02-013401
485.5875MHz
BANDPASS FILTE R
LNA
11-007402
02-01340111-007402
BANDPASS FILTE R
LNA
50-025306
SYSTEM DIAGRAM
TI TLE
CUSTOMER DRAWING No
England
Tel : 01494 777000
Fax : 01494 777002
02-013401
485.5875MHz
BANDPASS FILTER
LNA
11-007402
02-013401
488.4-489.6MHz
BANDPASS FILTER
LNA 488.4-489.6MHz
11-007302
Aerial Facili ties Limited
LNA
11-007302
COM BI NER
COM BINER
05-003401
485.5875M H z
B/W=15kHz
17-010601
CHANNEL M O DULE
dB
0-30dB
10-000701
ATTENUATO R
LNA
11-007402
02-013401
485.5875MHz
BANDPASS FILT ER
491.6375M H z
491.8375M H z
B/W=15kHz
B/W=15kHz
17-010601
FREQUENCY PROGRAMMING DATA
FREQUENCY PROGRAMMING DATA
8 x CHANNEL MODULE
SPLITTER
05-003401
05-002603
492.0375M H z
491.6175M H z
492.1750M H z
491.6625M H z
FREQUENCY PROGRAMMING DATA
FREQUENCY PROGRAMMING DATA
FREQUENCY PROGRAMMING DATA
SPLITT ER
05-002603
dB
0-30dB
10-000701
ATTENUATOR
LNA
11-007402
02-011204
491.4-492.2MHz
BANDPASS FILT ER
B/W=15kHz
B/W=15kHz
B/W=15kHz
492.0125M H z
B/W=15kHz
B/W=15kHz
FREQUENCY PROGRAMMING DATA
FREQUENCY PROGRAMMING DATA
50-025304
491.4125M H z
B/W=15kHz
FREQUENCY PROGRAMMING DATA
FREQUENCY PROGRAMMING DATA
0-30dB
dBdB
AGC ATT .
LNA
11-007302
10-000701
ATTENUATO R
LNA
11-006102
AGC
AGC DET.
17-001101 17-001201
02-013401
485.5875MHz
BANDPASS FILTE R
0-30dB
AGC ATT .
17-001201
LNA
11-00730212-016301
dBAGC dB
10-000701
ATTENUATO R
REP RODUCTION OR US E OF THIS DESI GN BY OTHERS IS
PA
AGC DET.
17-001101
02-013401
488.4-489.6MHz
BANDPASS FILTE R
UPL INK
ANTENNA
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
DATEDRAWN
1:1
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AE RIAL FACILITIES LTD.
TWO DECIMAL PLACES ± 0.1mm
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TOLE RANCES SCALE
UNLESS OTHERWISE STATED
ALL DIMENSIONS A RE IN mm
PB G D
MNR 30/07/03
CHKD APPD
DATEDESCRIP TIONNo
30/ 07 / 03
ISSUE
PRODUCT ION ISS UE MNR
1A
1 23 45 6 78 9101112
A
B
ANT ENNA
DO WNLI NK
C
H/book Number:-50-025301HBKM
D
E
F
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
G
18 of 69
1 23 45 6 78 9101112
THIRD ANGLE PROJECTION
H
5. SUB-UNIT MODULES
5.1 VTA Downlink Duplexer Shelf 60-025302 (4U chassis)
5.1.1 Bandpass Filters (02-011204 & 02-013401)
5.1.1.1 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.
5.1.1.2 Technical Specification (02-011204)
PARAMETER SPECIFICATION
Passband 491.4-492.2 MHz
Insertion Loss 1.9 dB typical
> 485 MHz > 55 dB
Rejection
> 458-459 MHz > 60 dB
Power Rating 50 Watt
Impedance 50 ohm
VSWR Better than 1.2:1
5.1.1.3 Technical Specification (02-013401)
Passband 485.5875MHz
Insertion Loss 1.9 dB typical
> 492 MHz > 60 dB
Rejection
> 488-489 MHz > 55 dB
Power Rating 50 Watt
Impedance 50 ohm
VSWR Better than 1.2:1
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
19 of 69
5.2 VTA Downlink Amplifier Shelf (50-025303, 8U Chassis)
5.2.1 UHF 3dB Splitter (05-002603)
5.2.1.1 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.
5.2.1.2 Technical Specification
PARAMETER SPECIFICATION
Frequency Range:
400-500 MHz
Power Rating: 5 Watts
Insertion Loss: 5.2dB Typical
VSWR: 1.2:1
Impedance: 50 Ohms
Connectors: SMA
Weight: <0.5Kgs
Mechanical: Drawing No. 07-003890
5.2.2 ¼Watt 0- -30dB Switched Attenuator (10-000701)
5.2.2.1 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.
5.2.2.2 Switched Attenuators
The AFL switched attenuators are available in two different types; 0 – 30dB in 2 dB steps
(as in this case), 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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
20 of 69
5.2.3 Low Noise Amplifier (11-006102)
5.2.3.1 Description
The 15dB gain low noise amplifier used in the unit is a double stage solid-state low noise
amplifier. Class A circuitry is used throughout the units to ensure excellent linearity over
a very wide dynamic range. The 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 a failure, then the complete amplifier should be replaced.
5.2.3.2 Technical Specification
PARAMETER SPECIFICATION
Frequency range: 380-500MHz
Bandwidth: <150MHz
Gain: 15.5dB ±0.5dB
1dB compression point: 31dBm
IP3: 46dBm
I/O return loss: >18dB
Noise figure: <1.3dB
Supply requirement: 10 – 24V, DC
Consumption: 510-540mA @ (10 – 24V)
storage: -20°C to +55°CTemperature
range
operation: -40°C to +70°
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
21 of 69
5.2.3.3 Drg. N. 11-006170, LNA Circuit Diagram (RF)
A
B
C
D
E
F
G
H
2
A
RF O UT
0R0
R1 6
R1 7
RF O UT
(OPTIONAL)
11-006170
C17
8.2pF
L13
C1 3
220pF
6.8pF
C1 0
L8
7.5nH
L14
18nH
18nH
3.3pF
C1 6
100R
R1 5
220pF
C9
C1 5
6.8pF
L12
18nH
L11
18nH
C1 4
220pF
6.8pF
C1 2
220pF
C1 1
L10
7.5nH
380-500MHz 1W AMPLIFIER
(RF) CIRCUIT DIAGRAM
TI TLE
CUSTOMER DRAWI NG No
England
Tel : 01494 777000
Fax : 01494 777002
Aerial Facilities Limited
123456789101112
L7
180nH
S
D
G
T1
CYL 5
56R
R5
L5
1nF
C5
220pF
C6
L4
18nH
6.8nH
R9 R1 0
10K 0R0
R7 R8
L3
18nH
C4
6.8pF
R1 3 R1 4
10K 0R0
R1 1 R1 2
100R
R4
3.3pF
C3
L2
L1
18nH
C2
8.2pF
L9
180nH
S
D
G
CYL 5
T2
56R
R6
L6
6.8nH
C7
C8
1nF
18nH
R3
910R
5R6
R2
220pF
R1
910R
ANY CO MP ONE NTS IN ARE NO T US ED IN THIS BUIL D
C1
REP RODUCTION OR US E OF THIS D ESIGN B Y OTH ERS IS
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
DATEDRAWN
N.T.S
BY AERIAL FACILITIES LTD.
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
TWO DECIMAL PLACES ± 0.1mm
NO DECIMAL P LACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TOLERANCES SCALE
IB
UNLESS OTHERWISE STATED
ALL DIMENSIONS ARE IN mm
CB
MNR 23/01/02
CHKD APPD
MNR
DATEDESCRIPTIONNo
23/ 01/ 02
ISSUE
PRODUCTION ISSUE
1A
123456789101112
A
B
C
H/book Number:-50-025301HBKM
D
E
F
RF IN
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
G
THIRD ANGLE PROJECTION
H
22 of 69
5.2.3.4 Drg. N. 11-006171, LNA Schematic Diagram (DC)
A
CO N1
9 WAY 'D'
PIN OUTS
89
B
RELAY CONT ACT BAD
+12V DC I/P
1
A
GROUND
3
2
3 CON1
2 CON1
C
*
*
D
*
E
BYDAT EDESCRIP TIO NNo
MNR
F
3
A
23/01/02
REL AY CO NT ACT G OO D
REL AY CO MM ON
5
4
687
TTL VOL TAG E SET
TTL ALARM/0 v GO OD
OC GOOD/0v BAD9 CON1
9
RF
OUT
ISSUE
11-006171
7 CON1
5 CON1
4 CON1
8 CON1
PRODUCTION ISSUE
7
1A
C
+8V
O
G
REG 3
LM7808CT
6
I
DC PCB
SEE 11-003971
BA
FOR CIRCUIT DIAGRAM
J4 2
J5 1
J4 1
J5 2
= ONLY APPLIES TO 11-006802
5
CO N2 - J4
CO N2 - J5
*
380-500MHz 1W AMPLIF IER
SCHEMATIC DIAGRAM
TITLE
CUSTO M ER DRAWING .No
England
Tel : 01494 777000
Aerial Facilities Limited
Fax : 01494 777002
4
+6V 220mA
-ve
+6V 220mA
3
DC INPUT DC OUT PUT
-ve
SCALE
SEE 11-006170
RF PCB
FOR CIRCUIT DIAGRAM
12
A
B
H/book Number:-50-025301HBKM
C
Issue No:-
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES L TD.
REPRO DUCT IO N OR USE O F T HIS DE SIG N BY OT HERS IS
PERMISSIBLE O NLY IF EXPRESSLY AUTHO RISED IN WRITING
BY AERIAL FACILIT IES LTD.
23/01/02
APPD
DAT E
IN
RF
D
E
MNR
CHKD
DRAWN
F
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Date:-04/07/2003
1
Page:-
23 of 69
TO L ERA NCES
IB
CB
NO DECIM AL PL ACE ± 1 m m
ONE DECIMAL PL ACE ± 0.3 mm
TWO DECIMAL PLACES ± 0.1 mm
1 23456789
AL L DIMENS IO NS ARE IN m m
UNLESS OT HERWISE STATED
5.2.4 Low Noise Amplifiers (11-007302 & 11-007402)
5.2.4.1 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 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. The two amplifiers are very similar in construction,
the only difference is the biasing, which changes the gain figure, see tables below.
5.2.4.2 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 +55°C
storage: -30°C to +70°C
Weight: <300gms
Size: 90 x 55 x 30.2 (case only)
5.2.4.3 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
Temperature range:
operational: -10°C to +55°C
storage: -30°C to +70°C
Weight: <300gms
Size: 90 x 55 x 30.2 (case only)
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
24 of 69
5.2.4.4 Drg. N. 11-007302, LNA Assembly With Alarm Relay
12345
678
9
A
B
C
D
E
F
A
BYDATEDESCRI PTI ONNo
DBS
3
IN 3 PLACES
RF PCB
9/7/02
6
2
7 32
25
3
33
4
DC PCB
2
17 24
10
2 25
ISSUE
11-007302
PRODUCTION ISSUE
IN 2 PLACES
24
1A
LOW NOI SE AMPLIFIER 380-500MHz
(20dB) ASSEMBLY DRAWING (WITH RELAY)
TITLE
CUSTO ME R DRG .No
England
2
Aerial Facilities Ltd
Tel : 01494 777000
Fax : 01494 777002
268 30
5
27
5
27
20
15
16 23
W1
C12
J31 J32
R4
W2
2
2
W5
W6
C21
W7
RF O UT
R19
+
L5
TR1
R16
C9
L3
C8
R2
L1
C5
C4
C2
C1
CPL 1
R1
R44R43
R50 R49
J3 J1J2
RL1
R39
REG 3
CON1
4
2
5
21
22
2
1
IN 4 PLACES
see note 2
31
AFL
see note 2
35
1 23 456 78 9
COMPONENTS TO BE ADDED TO 11-003912,ITEM 15,DC PCB SUB-ASSEMBLY
A
B
H/book Number:-50-025301HBKM
LABEL DETAILS - SCALE 1:1
1.5: 1
see note 2
2819
AFL
34
DEVICES
SENSITIVE
FOR HANDLING
E LE C TRO STA TI C
OBSERVE PRECAUTIONS
ATTENTION
AFL
C
IN
OUT
0086
THIS IS A PROPRIETARY DESIGN OF AERIAL F ACILITIES LT D.
********
11-007302
380-500MHz
20dB 10-24V DC
**/**/20 **
REF .
FREQ.
GAIN
S/N
DAT E
1. SOLDER JOINTS TO BE MADE USING OR
D
E
2. LIDS,ITEMS 2 & 3 AND LABELS,ITEMS 31,34 & 35,TO BE FITTED ON TEST
DAT E
DRAWN
SCALE
BY A ERIAL F ACIL IT IES LT D.
PERMISSIBLE O NLY IF EXPRESSL Y AUTHORISED IN WRITING
REPRODUCTION OR USE OF T HIS DESIGN BY OTHERS IS
DBS 9/7/0 2
TWO DECIMAL PL ACES ± 0 .1mm
ONE DECIMAL PL ACE ± 0 .3m m
NO DECIMA L P LA CE ± 1 mm
TO L ERA NCES
APPD
CB IB
AL L DIME NSIO NS A RE IN m m
UNL ESS O T HERWISE STA TED
CHKD
F
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
25 of 69
5.2.4.5 Drg. N. 11-007370, LNA RF Circuit Diagram
A
89
7
B
C
D
E
BYDAT EDESCRIP TIO NNo
DBS
5/7/02
19/9/02
ISSUE
F
3
A
11-007370
PRODUCTION ISSUE
ECN271 8 DB S
2A
1A
LOW NOISE AMPLIFIER 380-500MHz
(20dB) RF PCB CIRCUIT DIAGRAM
ATTENUATOR GROUP
(Select values on Test)
6
W2
W5
0R0
5
0R0
W6
0R 0
W7
0R 0
4
0R 0
R19
W1
0R 0
R2 R5
3
0R 0
R10
R9
R11
R8
CPL2
11303- 3
J31
HEADER PIN
10K
C5
1nF
100R
J32
HEADER PIN
1nF
1nF
C13
R4
C9
1nF
L5
GS
L3
330nH
L1
C12
560R
100nH
D
TR 1
CLY2
Ø1.6x6 turns
51R
J12
HEADER PIN
R7
560R
1nF
C10
1nF
C6
L6
100nH
D
G S
TR 2
CLY2
L4
330nH
L2
Ø1.6x6 turns
TITLE
J11
HEADER PIN
R6
R3
100R 10 K
CUSTO M ER DRAWING .No
England
Tel : 01494 777000
Aerial Facilities Limited
Fax : 01494 777002
-
SCALE
RF OUTPUT
C4
3. 3pF
1nF
C1
C7
3. 3pF
1nF
C3
12
A
B
H/book Number:-50-025301HBKM
R1
C
Issue No:-
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES L TD.
REPRO DUCT IO N OR USE O F T HIS DE SIG N BY OT HERS IS
PERMISSIBLE O NLY IF EXPRESSLY AUTHO RISED IN WRITING
BY AERIAL FACILIT IES LTD.
11303- 3
51R
CPL1
5/7/02
DAT E
RF INPUT
D
E
DBS
DRAWN
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Date:-04/07/2003
1
Page:-
26 of 69
TO L ERA NCES
NO DECIM AL PL ACE ± 1 m m
ONE DECIMAL PL ACE ± 0.3 mm
TWO DECIMAL PLACES ± 0.1 mm
APPD
1 23456789
AL L DIMENS IO NS ARE IN m m
CB IB
UNLESS OT HERWISE STATED
CHKD
F
5.2.4.6 Drg. N. 11-007371, LNA DC Wiring Diagram
A
CO N1
9 WAY 'D'
PIN OUTS
89
B
RELAY CONT ACT BAD
10-24V DC I/P
1
A
GROUND
3
2
3 CON1
2 CON1
C
D
E
BYDAT EDES CRIPT IO NNo
DBS
F
3
A
8/7/02
REL AY CONT ACT G OO D
REL AY CO MM ON
5
4
687
TTL VOL TAG E SET
TTL ALARM/0 v GO OD
OC GOOD/0v BAD9 CO N1
9
RF
OUT
ISSUE
11-007371
7 CON1
5 CON1
4 CON1
8 CON1
PRODUCTION ISSUE
7
1A
C
+8V
O
G
REG 3
LM7808CT
6
I
DC PCB
SEE 11-003971
BA
J31 1
J32 2
FOR CIRCUIT DIAGRAM
J12 2
J11 15V 75mA
5
J31 - J32
J11 - J12
LOW NOISE AMPLIFI ER. 380-500MHz
(20dB) RF SCHEMATIC DIAGRAM
TITLE
CUSTO M ER DRAWING. No
England
Tel : 01494 777000
Aerial Facilities Limited
Fax : 01494 777002
4
-
-ve
3
5V 75mA
DC INPUT DC OUTP UT
-ve
SCALE
SEE 11-007370
RF PCB
FOR CIRCUIT DIAGRAM
12
A
B
H/book Number:-50-025301HBKM
C
Issue No:-
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES L TD.
REPRO DUCT IO N OR USE O F T HIS DE SIG N BY OT HERS IS
PERMISSIBLE O NLY IF EXPRESSLY AUTHO RISED IN WRITING
BY AERIAL FACILIT IES LTD.
8/7/02
APPD
DAT E
IN
RF
D
E
DBS
CHKD
DRAWN
F
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Date:-04/07/2003
1
Page:-
27 of 69
TO L ERA NCES
NO DECIM AL PL ACE ± 1 m m
ONE DECIMAL PL ACE ± 0.3 mm
TWO DECIMAL PLACES ± 0.1 mm
1 23456789
AL L DIMENS IO NS ARE IN m m
CB IB
UNLESS OT HERWISE STATED
5.2.5.7 Drg. N. 11-003971, LNA DC Circuit Diagram
A
89
7
6
5
4
3
C5
+
R28
0R
C4
+
1
12
BCA
V_OUT
J2 2
V_IN
CON 1
A
B
R18
22K
R17
2K 2
TR 6
FZT751
BCW71
TR 5
R16
1K
BCW71
TR 4
R14
3K
1U
C3
+
R13
4K 7
D1
R8
270K
10
R7
1
LM324M
IC1:A
+
R57
*
3
R1
1K 8
7
1
4
8
*
IC4:B
IC4:A
+
-
5
6
*
R53
C19
100n
*
R42
VR1
*
R41
*
1u
1u
2
>12V DC I/P
J2 1
CON 1
*
-
2+3
*
*
R54
R55
***
R43 R44 R45
A
REG1
IO
C7
470p
*
C6
10u
1K
R47
*
R39 R40
+
I C L7660C
R38
100R
853
IC2
4
2
10u
C8
+
P1
B
C
CON 18
P5
7CON 1
R58
1K
*
R59
*
1
R24
ZD 2
3V 3
R19
560R
R15
2K 4
LL4148
8
LM324M
IC1:C
+
9
1K
R6
100K
-
2
R46
1K
LM337LM
10u
C9
+
RL1
P3
D3
LL4148
56R
R27
R36
4K 7
R32
R35
1K
LE D 1
D2
LL4148
7
270K
R10
IC1:B
-
+
5
R9
1K
R11
C2
100n
14
11
4
IC1:D
+
-
LM324M
R4
12
13
100K
R5
100K
R3
100K
R2
120R
0R
R29
R56
470R
R48
1K
P2
1u
+
C12
10u
C10
+
100n
C11
1J1
2J5
R49
R51 R50
I C L7660C
2J1
1J5
C
D
P4
9CON 1
TR 3
BCW71
R25
4K 7
10K
TR 2
BCW71
R23
R22
4K 7
10K
TR 1
R21
4K 7
R20
10K
TR 8
BCW71
R31
4K 7
10K
TR 7
BCW71
R33
4K 7
R34
10K
LM324M
6
R12
3K 6
120R
1u
C1
+
ZD 1
1. 23V
***
A
REG2
LM337L M
IO
1K
R52
+
C15
10u
5
3
8
IC3
4
2
10u
C14
+
ZD 3
5. 1V
C13
10u
+
D
5CON 1
RL1/1
4CON 1
P8
P7
RL1/2
C18
1u
+
10u
C16
100n
C17
1J3
2J4
2J3
1J4
E
BYDAT EDES CRIPT IO NNo
DJL
TAS1A
DJL
DJL
CON 13
2 4 /9/0 1
26/11/01
1 7 /4/0 2
2 5 /7/0 2
F
A
3
ISSUE
P6
ECN2686
3A
PROTOTYPE ISSUEAA
PRODUCTION ISSUE(ECN2359)
2A ECN25 18
DC PCB FOR LNA's AND LPA's,
TITLE
11-003971
CIRCUIT DIAGRAM
CUSTO M ER DRAWING.No
THIRD ANGL E PROJECTION
England
Fax (01494)778910
Chesham(01494)778301
Aerial Facilities Limited
SCALE
BY AERIAL FACILIT IES LTD.
PERMISSIBLE O NLY IF EXPRESSLY AUTHO RISED IN WRITING
REPRO DUCT IO N OR USE O F T HIS DE SIG N BY OT HERS IS
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES L TD.
DAT E
1. * IF APPLICABLE, VALUES WILL BE DETERMINED AT A HIGHER LEVEL BOM
2. CONNECTORS J1-5 TO BE FITTED AS NECESSARY
DRAWN
E
TO L ERA NCES
TWO DECIMAL PLACES ± 0.1 mm
ONE DECIMAL PL ACE ± 0.3 mm
NO DECIM AL PL ACE ± 1 m m
IB
24/09/01
APPD
1 23456789
CB
AL L DIMENS IO NS ARE IN m m
DJL
UNLESS OT HERWISE STATED
CHKD
F
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
28 of 69
5.2.6 3 Stage Amplifier Alarm Boards (12-002201)
5.2.6.1 Description
Amplifier Alarm Boards are fitted to monitor the bias conditions of AFL Class A
amplifiers which remain constant in normal operation. Any departure from normal bias
conditions is a result of device failure, excess temperature, over-driving or oscillation
(excessive power).
In normal operation, the Class A bias circuit of the amplifier develops a constant voltage
of 1.20V across the collector current setting resistor. The Amplifier Alarm Board is a
window comparator device, which is adjusted to sense a departure from this condition.
Several different alarm outputs are provided to simplify interfacing, (Relay Contact, Open
Collector, and TTL Logic Levels)
The basic version of the Alarm Board (12-002801) monitors a single amplifier stage. A
three-stage version (12-002201) is used on complex amplifiers where three separate
comparators have their outputs logically combined to a common output stage. Failure of
any one stage will activate the alarms.
Note that the alarm board has a green Light Emitting Diode located near to the centre of
the printed circuit board, which is illuminated on ‘Good’, and extinguished on ‘Alarm’. It
is therefore a simple matter to identify an active module failure, by searching for an
Alarm Board which has its green LED extinguished. A simple test of the alarm board is
possible by shorting across the monitor inputs, pins 1 and 2, 3 and 4 or across pins 5 and
6. This last monitor input is inactive if the board has been converted to a two way alarm
board. (Refer to relevant amplifier alarm wiring diagram.)
1) Volt-free change over relay contacts.
2) Open collector NPN transistor pulls low on alarm.
3) TTL driver.
The use of precision voltage sources and resistors has eliminated the need for initial
adjustment or calibration, and the board will function correctly with a wide variation in
power supply voltage (8 to 30 volts, nominal supply is 12 or 24Volts).
There are two selectable link options on the three-way board:
LINK1 - Removed to convert to two-way alarm board.
LINK2 - Removed to isolate 0V from chassis earth.
The one way alarm board only has the 0V isolation link (LINK2) fitted.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
29 of 69
5.2.6.2 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:
Relay approval: BT type 56
Connector details: 15-way 0.1" pitch
Temperature range:
operational: -10°C to +55°C
storage: -40°C to +70°C
PCB Size:
>2x107 operations
74 x 56mm (3 stage)
54 x 56mm (1 stage)
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
30 of 69
5.2.6.3 Drg. N. 12-002201, 3 Stage Alarm Board Assembly Drawing & Parts
List
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
31 of 69
5.2.6.4 Drg. N. 12-002270, 3 Stage Alarm Board Circuit Diagram
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
32 of 69
A
17 18
16
15
B
C
CONN
7
+8v TO +30v
FZT751
TR 6
VCC
D
R41
22K
R40
2K 2
1K
R38
3K
R36
E
D9
3v3
TR 4
TR 4
R39
BCW71 BCW71
R37
1. 0
C8
F
100n
C6
LK 2
560R
2K 4
R26
0v
R25
1K
G
D6
14
270K
+-IC1
12
13
R24
100K
CONN8
4111
+
3
H
ALARM
CONTACTS
CONN10
9CONN
6
7
8
R27
1K
RL1/2
C4
IC1
-
2
14
LOW
CONN6
INPUT
CONN5
13
MONI TOR 3
100K
R23
R21
100K
D4
I
D7
8
OP AMP
R28
+-IC1
270K
10
9
100n
100K
R22
D5
J
LK 1
CONN11
TTL ALARM
K
L
M
1
A
18
0V15CONN
CONN
CONN
O/C ALARM
13
+5v TTL I N
12
R35
1K
10K
R33
10K
R31
2
+7. 5v
CONN
14
ALARM 0v
12-002270
17
TR 3
BCW71BCW71
4K 7
R34
TR 2
4K 7
R32
LE D 1
D8
RL1
REL
-
+
BCW71
TR 1
2K 2
R30
3 ST AGE AM PLIFIER ALARM BOARD
CIRCUIT DIAG RAM
TI TL E
CUSTOMER DRAWING No
Eng lan d
3
4
2
RL2/2
NOT USE D
Tel : 01494 777000
Fax : 01494 777002
Ae ria l F acil itie s Lim ite d
N.T.S
10 11 12
78 9
6
1234 5
A
14
R18
270K
-
IC2
+
12
1K
R17
LOW HI
CONN4
INPUT
CONN3
MONITOR 2
R9
+7. 5v +7. 5v
CONN2
INPUT
1CONN
MONITOR 1
HI LOW HI
B
C
D
VCC VCC
7
-
IC3
+
5
6
R1
1K 8
E
F
13
R19
R16
100K
1
4
11
+-IC2
3
100K
R15
R13
100K
D2
14
IC3
R10
+
270K
12
1K
R8
R7
100K
R5
100K
2
-
13
R11
1K
C2
100K
1
4
11
+-IC3
2
3
R2
120R
G
H
8
R20
270K
-
IC2
+
10
1K
100n
9
100n
C3
100K
R14
D3
8
R12
IC3
270K
+
-
10
9
R6
100K
7
IC2
+
-
6
5
R3
120R
R4
3K 6
C1
1uF
+
D1
1. 23v
I
SR12D
J
5.2.6.5 Generic Rack Shelf Enclosure Alarm Wiring Sketch
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
R29
4K 7
7
-
IC1
+
5
6
1u
C7
R42
4K 7
+7. 5v
0v 0v
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
BY AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
NO DECIMAL PLACE ± 1mm
TWO DECIMAL PLACES ± 0.1mm
ONE DECIMAL PLACE ± 0.3mm
TOLERANCES SCALE
APPD
DATE
RB RB
MR B 11/8/ 93
UNLESS OTHERWISE STATED
ALL DIMENSIONS ARE IN mm
DRAWN
CHKD
BYDA TEDESCRIPTIONNo
ISSUE
CR0508 14/1/94 MRB
PRODUCTION ISS UE 11/9/93 MRB
PRODUCTION ISS UE 29/8/00 MNR
1
2
2A
IC1 , IC2 & IC3 = LM324AM
ALL DIODES = LL4148 UNLESS MARKED OTHERWISE
1 2 3 4 5 6 7 8 9 101112131415 16
K
L
M
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
33 of 69
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
34 of 69
5.2.7 450MHz 20W Power Amplifier (12-004201)
5.2.7.1 Description
The power amplifiers fitted to this unit are multi-stage, solid state power amplifiers. Class
A circuitry is employed throughout the units 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 amplifiers should require no maintenance over their operating lives. Under no
circumstances should the cover be removed or the side adjustments disturbed unless it is
certain that an amplifier has failed; since they are critically aligned during manufacture
and any re-alignment will require extensive test equipment.
5.2.7.2 Technical Specification
PARAMETER SPECIFICATION
Frequency Range: 350 – 550MHz (tuned to spec.)
Bandwidth: 20MHz (tuned to spec.)
Maximum Output Power: >20W (each)
Gain: 30dB
1dB Compression Point: <+43dBm
3rd Order Intercept Point: <+54dBm
VSWR: better than 1.45:1
Connectors: SMA female
Supply: 3.50A @ 24V DC
Size: 276 x 78 x 40mm (ex. Cons. & h’sink)
Weight: 1.5 kg (approx., excl. h’sink)
operational: -10°C to +55°CTemperature
range:
storage: -40°C to +70°C
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
35 of 69
5.2.7.3 Drg. N. 12-004201, PA General Assembly
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
36 of 69
5.2.7.4 Drg. N. 12-004270, PA Circuit Diagram
A
B
C
D
E
BYDAT EDESCRI PT IO NNo
PDC
DBS1B
F
3
A
RF OUTPUT
C2 7
56pF
ALARM
DET.2
R4
1KR
C18
+24v
C31
*
1nF
R3
470R
+
C19
D1
2OCTQ4 5
56pF 1uF
R5
R4 7
ADJ
REG .2
ALARM
DET.1
ALARM
REF
C30
1000pF
C2 1
+
1uF 56pF
C20
OUT
IN
+
C1 4
4.7uF
R2
1KR
C23
15pF
FB4FB3FB2FB1
*
TR2
PTB2 00 31
*
C1 6
27pF
C2 8
18pF
C12
56pF
1-14pF
C25 C26
C24
15pF
C22
1-14pF
*
C17
27pF
C29
18pF
C15
1-14pF 1-14pF
C1 3
1-14pF
C11
1-14pF
C1 0
1-14pF
16/5/00
CR1679
3/8/98
PRODUC TION ISSUE
1A
*
ISSUE
12-004270
CIRCUIT DIAGRAM
POWER AMPLIFIER 450MHz 10/20W CLASS A
TITLE
CUSTO MER DRAWING.No
England
Fax (01494)777002
Tel: (01494) 777000
Aerial Facilities Limited
-
R1
1R2
+
ADJ
C3
1uF
OUT
IN
REG .1
LM337T LM337T
123456789
A
B
H/book Number:-50-025301HBKM
SCALE
*
TR1
TP5012
C6
*
56pF
47pF
C4
1-14pF
C2
1-14pF
THIS IS A PROPRIETARY DESIGN OF AERIAL F ACILITIES LT D.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE O NLY IF EX PRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
NO DECIM AL PL ACE ± 1m m
ONE DECIMAL PL ACE ± 0 .3mm
TWO DECIMAL PLACES ± 0 .1mm
TO L ERANCES
3/8/98DB S
APPD
DAT E
C7
1nF
*
C5
*
47pF
L1 L3 L4 L5
C8
220pF
L2
1uH
C1
123456789
+
C9
1uF
C
RF INPUT
D
CONDUCTORS S HOWN THUS: ARE 50 ohm STRIPLINES
REFER TO 12-004211 FOR COMPONENT P OSITIONS EXCEPT FOR THOSE MARKED
(THEY ARE SP ECIFIED ON 12-004201)
DRAWN
E
AL L DIME NSIO NS ARE IN mm
GB BB
UNLESS OTHERWISE STATED
CHKD
F
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
37 of 69
5
A
B
C
D
E
5.2.7.5 Drg. N. 12-004270C1, PA Parts List(1)
1234
CIRC.
REF.
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
AFL ST OCK REF.
93-200006 56pF CHIP CAP 10% TOL.(MIN)
93-130023 PCB MOUNT AI R TRIMMER 1-14pF
93-240003 1uF TANTALUM CHIP CAP 35V
93-130023 PCB MOUNT AI R TRIMMER 1-14pF
REFER TO GA 12-004201 FOR DETAILS
REFER TO GA 12-004201 FOR DETAILS
93-200020 1nF CHIP CAP 63V 10%
93-200014 220pF C HI P CAP 10% TOL (MIN)
93-240004 1uF TANTALUM CHIP CAP 35V
NOT FITTEDNOT FITTED
93-130023 PCB MOUNT AI R TRIMMER 1-14pF
56pF C HI P CAP 10% TOL.(MIN)93-200006
93-130023 PCB MOUNT AI R TRIMMER 1-14pF
4.7uF TANTALUM CHI P CAP 35V93-240006
93-130023
REFER TO GA 12-004201 FOR DETAILS
REFER TO GA 12-004201 FOR DETAILS
93-240003 1uF TANTALUM CHIP CAP 35V
93-200006 56pF CHIP CAP 10% TOL.(MIN)
93-240004 1uF TANTALUM CHIP CAP 35V
93-200006 56pF CHIP CAP 10% TOL.(MIN)
93-130023 PCB MOUNT AI R TRIMMER 1-14pF
93-200005 15pF CHIP CAP 10% TOL.(MIN)
93-130023 PCB MOUNT AI R TRIMMER 1-14pF
93-130023 PCB MOUNT AI R TRIMMER 1-14pF
93-200006 56pF CHIP CAP 10% TOL.(MIN)
93-200004 18pF CHIP CAP 10% TOL.(MIN)
93-200016 1000pF (1nF) CHIP CAP 10% TOL.(MIN )
REFER TO GA 12-004201 FOR DETAILS
PCB MOUN T AIR TRI MMER 1-14pF
15pF C HI P CAP 10% TOL.(MIN)93-200005
18pF C HI P CAP 10% TOL.(MIN)93-200004
DES CRIPT ION
A
B
C
D
E
F
2A
5/5/ 00
5/8/ 98
1A
ISSUE
G
DRAWN DAT E
PDC
CR1679
PROD. ISS.
DAT E ISSUEISSUEISSUE
Aerial Facilities Limited
CHKD
5/8/ 98
GB BB
APPD
DAT E
TITLE
CUST OMER
CHANGE NoCHANGE NoCHANGE NoCHANGE No DAT EDAT E
POWER AMPLIFIER,450MHz,10/20W
CIRCUIT COMPONENT LIST
COMPONENT LIST FOR
12-004270C1
F
G
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
38 of 69
5.2.7.6 Drg. N. 12-004270C2, PA Parts List(2)
5
1234
CIRC.
REF.
TR1
A
TR2
REG1
REG2
D1 94-120006 2OTQ45 45V DUAL SCHOTTKY DIODE
AFL ST OCK REF.
REFER TO GA 12-004201 FOR DETAILS
REFER TO GA 12-004201 FOR DETAILS
94-300002 LM337T, VOLTAGE REGULATOR
LM337T, VOLTAGE REGU LATOR94-300002
B
R1
93-540075 1R2 2.5W RESISTOR
R2
R3
R4
R5
1KR CHIP RESISTOR93-630037
470R C HI P RESISTOR93-630032
1KR CHIP RESISTOR93-630037
47R 6W RESISTOR93-540083
C
90-500012 1. 25 ENAMELLED COPPER WIR E
L1
93-910001 FERRITE BEAD
L2 93-400004 1.0uH CH OKE SIGMA SC10 SERIES
1.25 EN AMELLED COPPER WI RE90-500012
FERRITE BEAD93-910001
1.25 EN AMELLED COPPER WI RE90-500012
FERRITE BEAD93-910001
1.25 EN AMELLED COPPER WI RE90-500012
FERRITE BEAD93-910001
D
L3
L4
L5
DES CRIPT ION
A
B
C
D
E
F
5/5/ 002A CR1679
1A
5/8/ 98
ISSUE
G
DRAWN DAT E
DAT E ISSUEISSUEISSUE
Aerial Facilities Limited
PDC
H/book Number:-50-025301HBKM
5/8/ 98
PROD. ISS.
CHKD
GB BB
APPD
DAT E
TITLE
POWER AMPLIFIER,450MHz,10\20W
CIRCUIT COMPONENT LIST
CUST OMER
COMPONENT LIST FOR
12-004270C2
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
E
F
CHANGE NoCHANGE NoCHANGE NoCHANGE No DAT EDAT E
G
39 of 69
5.2.7.7 Drg. N. 12-003670, PA to Alarm Wiring Details
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
40 of 69
5.2.8 Single DC/DC Converter (13-001702)
5.2.8.1 Description
This unit it is used to derive a fixed voltage power supply rail from some higher voltage.
Typically, it is used to derive 5V, 8V, 12V or 15V from a 24V input. This particular
regulator is dedicated to supply 12.8V DC.
The circuit is based upon an LM317 variable voltage regulator, which is capable of
supplying a maximum of 1.5A output current. Note that at full output current the
dissipation of the device must remain in limits, bearing in mind the voltage which is
being dropped across it. The maximum allowable dissipation will also depend on the
efficiency of the heatsink on which the device is mounted.
The output voltage of the unit is programmed by the resistive divider which is fitted
between the output terminal, the reference terminal and ground. R1 is the reference
programming resistor and is fixed in all versions. R2 is fitted on 12V versions while R3,
(which is in parallel with R2) is fitted on 8V and 5V versions.
5.2.8.2 Technical Specification
PARAMETER SPECIFICATION
Operating Voltage: 21 – 27V DC
Temperature
range:
Output Voltages: 12.4V (typical)
Output Current: 1.0A (maximum per o/p)
Connections: Screw Terminal Block
operational:
storage:
-10ΒC to +55ΒC
-40ΒC to +70ΒC
PCB Size: 47 x 30mm
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
41 of 69
5.2.8.3 Drg. N. 13-001702, 12.8V Regulator Assembly Drawing & Parts List
A
3
BYDAT EDESCRIPTIONNo
MNR
ISS
1 2/7 /0 0
ISSUE
13-001702 1A
10 0n F 6 3V PO LYESTER CAP FILM
1A PRODUCTION ISSUE
AFL ST OCK REF. DESCRIPTION
REF.
COM P.
93-140002 2.2uF 35V TANTALUM CAP
9 3- 1 4 0 00 2 2 .2 uF 3 5V TANT AL UM CA P
C1
TB 1 9 1 - 7 00 0 0 3 3 WAY P RINTE D CIRCUIT CO N
C2 93 - 1 4 00 0 4 1 0 uF 3 5 V TA NTAL UM CA P
C3
C4 93-120003
D1 94-100006 DIODE 1N4003 [1N4000
93-540039 2K2 0.25W 1% RES MRS25 M:F
94-300001REG 1 L M 31 7 T N. S.C/MO T VO LT AG E REG
R1 93-540024 240R 0.25W 1% RES MRS25 M:F
R2
12.8v REGULATOR,ASSEMBLY
TITLE
CUSTOM ER DRG.No
23
PART SECTION SHOWING
26
25
POSITION OF C/BORE
1
1
IN 2 PLACES
England
Fax : (01494)777002
Aerial Facilities Ltd
Tel : (01494)777000
2624
REG1
R3 R2 R1
13-001725
THIRD ANG LE PROJECTION
123456
TB1
+
AFL Ltd
C3 C2
+
D1
C1
C4
+
2 3
NOTE
1: ALL SOLDERED CONNECTIONS TO BE MADE USING ITEM
(SEE B.o.M FOR BALLOON IDENTS)
2: WHERE INDIVIDUAL ITEMS ARE NOT BALLOONED THE COMPONENT IS IDENTIFIED
ON BOTH THE COMPONENT LIST AND THE DRAWING BY ITS COMPONENT REF.
2:1
1
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES L TD.
REPRODUCTIO N OR USE OF THIS DESIG N BY OT HERS IS
PERMISSIBLE ONLY IF EXPRESSL Y AUTHORISED IN WRITING
BY AE RIAL FA CILI TIES LT D.
NO DE CIMAL PL ACE ± 1 m m
ONE DECIMAL PLACE ± 0 .3m m
TWO DECIM AL PL ACES ± 0 .1 mm
TO L ERANCE S SCAL E
R1
REG1
R3R 2
C2C3
+
13-001725
A FL Ltd
+
D1
C4
+
C1
USED O N
TB1
DATE
ACTUAL SIZE
DRAWN
BB
APPD
AL L DIM ENSIO NS ARE IN mm
MNR 12/7/00
CHKD
UNLESS O THERWISE STATED
GB
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
1
Page:-
42 of 69
5.2.8.4 Drg. N. 13-001771, 12.8V Single Regulator Circuit Diagram
A
B
C
D
E
BYDA TEDESCRIPTIONNo
MNR
13/7/00
ISSUE
F
3
A
13-001771
8 9
12.8v OUTPUT
6 TB1
5 TB1
3 TB1
4 TB1
CR1679
1A
7
12.8v REGULATOR, CIRCUIT DIAGRAM
TITLE
++
C3
R2
2K2
R1
240R
VOUT
ADJ
REG1
LM317T
C4
100n
CUSTO ME R DRAWING.No
6
England
Aerial Facilities Limited
5
Fax : (01494)777002
Tel : (01494)777000
4
VIN
D1
1N4003
TB1 1
1 234 5 678 9
A
B
H/book Number:-50-025301HBKM
+
C1 C2
2u2 10u 2u2
SCALE
3
2
TB1 2
18-30V INPUT
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES L TD.
REPRO DUCTIO N OR USE O F T HIS DESIG N BY O THERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AE RIAL FACIL IT IES L TD.
TO L ERANCES
NO DE CIMAL PL ACE ± 1 m m
ONE DECIMAL PLACE ± 0 .3mm
TWO DECIM AL PL ACES ± 0 .1 mm
APPD
DATE
1
AL L DIM ENSIO NS ARE IN mm
MNR 13/7/00
CHKD
C
D
E
DRAWN
UNLESS O THERWISE STATED
GB B B
F
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
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5.2.9 24V Single Relay Board (80-008902)
5.2.9.1 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.
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
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5.2.9.2 Drg. N. 80-008970, Single Relay Board Circuit Diagram
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
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5.2.10 24V 410W Power Supply (96-300054)
5.2.10.1 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 8.0 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.
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. No drawings of the PSU are available.
5.2.10.2 Technical Specification
AC Input Supply:
Voltage: 110 or 220V nominal - 90 to 132 or 180 to
264V (single phase, absolute limits)
Frequency: 47 to 63Hz
DC Output Supply:
Voltage: 24V DC (nominal), 22 to 26V
(absolute limits)
Current: 17.0A
Temperature
range:
operational:
storage:
-10ΒC to +55ΒC
-40ΒC to +70ΒC
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9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
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5.3 VTA Downlink Channel Shelf (50-025304)
5.3.1 UHF 3dB Splitter (05-002603) See section 5.2.1
5.3.2 4-Way Splitter (05-003401)
5.3.2.1 Description
The Splitter/Combiners used are devices 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.
5.3.2.2 Technical Specification
PARAMETER SPECIFICATION
Frequency range: 170 – 550MHz
Bandwidth: 280MHz
Rejection: >14dB
Insertion loss: 6.5dB (in band, typical)
Connectors: SMA
Weight: <1.5Kgm
Temperature
range:
operational
storage
-10ΒC to +55ΒC
:
-40ΒC to +70ΒC
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
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5.3.3 Channel Control Module (17-002101)
5.3.3.1 Description
The purpose of the channel control modules is to change the channel selective module
frequencies by means of a series of D.I.P switch banks, each switch corresponding to a
different ‘frequency bit’.
5.3.3.2 Technical Specification
Below shows the pin assignments for each switch on a channel control module.
IDC PIN 25-way Connector Function
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
19 4
20 16
N/C
21 3
22 15 +5V
23 2 0V
24 14 Switched 12V
25 1 0V
26 --- ---
H/book Number:-50-025301HBKM
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Maintenance Handbook
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5.3.3.3 VHF/ UHF 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.
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
H/book Number:-50-025301HBKM
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Maintenance Handbook
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5.3.3.4 VHF/ UHF Programming Example
Frequency required: 465.5MHz
Channel spacing: 12.5 kHz
Synthesiser offset: 21.4MHz
The Local Oscillator frequency is therefore:
465.4 – 21.4 = 444.0MHz
Dividing the LO frequency by the channel spacing of 0.0125MHz:
444.0 = 35520
0.0125
This is an integer value, therefore it is OK to proceed.
Local Oscillator
Frequency of
444.0MHz
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
1 0 0 0 1 0 1 0 1 1 0 0 0 0 0 0
Switch settings
Switch setting: 0 = switch DOWN (on, frequency ignored)
1 = switch UP (off, frequency added)
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Maintenance Handbook
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5.3.4 Channel Selectivity Module (17-010601)
5.3.4.1 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 downconverted 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 (see section 5.3.3), 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.
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Issue No:-
Date:-04/07/2003
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5.3.4.2 Drg. N. 17-003080, Generic Channel Module Block Diagram
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
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5.4 VTA Uplink Duplexer Shelf (50-025305, 4U Chassis)
5.4.1 Bandpass Filters (02-011204 & 02-013401) See section 5.1.1
5.5 VTA Uplink Amplifier Shelf (50-025306, 8U Chassis)
5.5.1 20Watt Class A Power Amplifier (12-016301)
5.5.1.1 Description
This amplifier is a Class A 20W power amplifier with a frequency range 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). It has built in a Current Fault Alarm Function.
Its housing 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.
5.5.1.2 Technical Specification
Parameters Guaranteed Guaranteed Units
Temperature
Frequency Range 380 - 470 MHz
Small Signal Gain
Gain Flatness 1.5 1.7 dB p-p Max
∆Gain vs. Temperature
In/Out RL 18 18 dB Min
Output Power @ 1dB
Compression Point
Output 3rd Order IP 55.3 55.0 dBm Min
DC Supply Voltage
DC Supply Current 3700 typical 3800 mA Max
+25
≥23.0
43.2 43.0 dBm Min
24 ± 0.5
-10 to +60
1.0 dB Max
°C
dB
Vdc
H/book Number:-50-025301HBKM
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Maintenance Handbook
Issue No:-
Date:-04/07/2003
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5.5.1.3 Drg. N. 12-016370, 20W PA Circuit Diagram
A
R62
22K
2K 2
R43
TR 7
FZT751
BCW71BCW71
TR 9
1K
TR 10
R61 R60
3K
1U
C34
+
LE D 1 R63
4K 7
R57
270K
R66
R64
LM324M
3
1K 8
R58
good
4CON 1
RL1/1
150R
D1
8
IC1:C
+9-
10
1K
R65
1
IC1:A
-
+
2
B
bad
3CON 1
CON 1
common
1
3V 3
ZD 4
R50 R49
2K 4 560R
1
RL1
D3
LL4148
10K
R47
LL4148
LM324M
82K
LM324M
R56
270K
R69
1K
R76
100n
C36
14
11
4
IC1:D
+
-
R59
82K
13
12
100K
R55R44
100K
470R
C
oc good/ 0v bad
TTL al ar m
CON 1
CON 1
5
2
TR 11
BCW71
R74
4K 7
10K
R73
TR 8
BCW71
R48R53
TR 12
BCW71
4K 7 4 K 7
10K
R54
D2
LL4148
7
LM324M
IC1:B
+
6-5
3K 6
R68
8K 2
R67
C35
1u
+
ZD 3
1. 23V
D
1K
R42
C28 C27
100p 47p
+
C29
100u
R39R38R37R36
1R 5
2R 2 2R 2 1R 5
TR 6
TR 5
FZT651
R31
0R 0
330R
R32
R30
ZD 2
E
RF OUTPUT
R46
0R 0
470p
C23
C22C20 C21
10p 7.5p 2.2p
D
G S
TR 4
MRF9045
R23
27R
C24C25
1n 100p
C26
100u
+
R24
270R
C18
680R
R25
FZT751
6K 8
R26
R28R29 R27
6K 8 6K86K 8
1K 8
R33
3K 3
5. 1v
18p
C17
4. 7p
C16
15p
F
G
H
2
A
12-016370
POWE R AMPLIFIER,380-470MHz,20W,CLASS A,
CIRCUIT DIAGRAM
TI TLE
CUSTOMER DRAWI NG No
R40
50R
CPL2
HY45B
470p
1K
R41
C13 C12
100p 47p
+
100u
C14
R22R20R19 R21
1R 5
2R 2 2R 2 1R 5
TR 2
FZT651
R14
0R 0
R13
R15
330R
ZD 1
+24V
C8
C5 C6 C7
10p 7. 5p 2. 2p
D
G S
TR 1
MRF9045
R6
27R
C9C10
1n 100p
100u
C11
+
R7
270R
R8
680R
FZT751
TR 3
6K 8
R9
R11R12 R10
6K 8 6K 8 6K 8
R16
3K 3
1K 8
5. 1v
C3
18p
C2
4. 7p
C1
15p
England
Tel : 01494 777000
Fax : 01494 777002
Aerial Facilities Limited
BY AERIAL FACILITIES LTD.
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
REP RODUCTION OR US E OF THIS D ESIGN B Y OTH ERS IS
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
DATEDRAWN
TWO DECIMAL PLACES ± 0.1mm
NO DECIMAL P LACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TOLERANCES SCALE
UNLESS OTHERWISE STATED
ALL DIMENSIONS ARE IN mm
MI IB
DJL 06/08/02
CHKD APPD
DJL
DJL
DATEDESCRIPTIONNo
17/ 10/ 02
28/4/03
ISSUE
R45
0R 0
123456789101112
A
B
C
H/book Number:-50-025301HBKM
+
100u
C15
+24V
A2
A1
CON 1
CON 1
D
Issue No:-
HY45B
CPL1
R4R5
100R100R
E
F
R3
SAT
R2
0R 0
R1
SAT
RF INPUT
G
9 Way Channelised UHF Cell Enhancer
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Date:-04/07/2003
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ECN2882
AA PROTO TYPE ISSUE 6 /8/0 2 DJL
1 A PRO DUCTI ON I SSUE( E CN27 3 7 )
2A
123456789101112
THIRD ANGLE PROJECTION
H
5.5.2 Automatic Gain Control (17-001101, Det. & 17-001201, Atten.)
5.5.2.1 Description
The equipment is fitted with an Automatic Gain Control (AGC) system. This is generally
fitted in the Uplink path (not usually needed in the downlink path, as the signal here is at an
almost constant level), to avoid overloading the amplifiers (with the associated performance
degradation) should a mobile be operated very close to the unit.
Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors the
RF level being delivered by the power amplifier, and when a certain threshold is reached it
begins to increase the value of the attenuator to limit the RF output to the (factory set)
threshold. Therefore overloading of the power amplifier is avoided.
The factory set threshold is 1dB below the Enhancer 1dB compression point. Some
adjustment of this AGC threshold level is possible, a 10dB range is mostly achieved. It is
not recommended under any circumstances to adjust the AGC threshold to a level greater
than the 1dB compression point as system degradation will occur.
The detector comprises of a 50 transmission line with a resistive tap which samples a
small portion of the mainline power. The sampled signal is amplified and fed to a
conventional half wave diode rectifier, the output of which is a DC voltage proportional to
the RF input signal.
This DC voltage is passed via an inverting DC amplifier with integrating characteristics, to
the output, which drives the attenuation control line of the corresponding AGC attenuator.
This unit is fitted at some earlier point in the RF circuit.
The unit contains a 12V DC regulator in the detector module, which supplies stabilised
voltage to the DC amplifier and via an external cableform to the AGC attenuator.
For small signals, below AGC onset, the output control line will be close to 12V and the
AGC attenuator will have minimum attenuation. As the signal level increases the control
line voltage will fall, increasing the attenuator value and keeping the system output level at a
constant value.
The AGC onset level is adjusted by the choice of sampler resistor R1 and by the setting of
potentiometer VR1.
The attenuator comprises a 50 P.I.N diode, voltage-variable attenuator with a range of 3 to
30dB. The attenuation is controlled by a DC voltage which is derived from the associated
AGC detector unit.
H/book Number:-50-025301HBKM
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Maintenance Handbook
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5.5.2.2 Technical Specification
PARAMETER SPECIFICATION
Frequency Range: up to 1000MHz
Attenuation Range: 3 to 30dB
Attenuation Steps: continuously variable
VSWR: better than 1.2:1
RF Connectors: SMA female
attenuator: 1WPower Handling:
detector/amp: >30W (or as required)
operation: -10°C to +55°CTemperature Range:
storage: -40°C to +70°C
Size:
Weight:
attenuator pcb 50 x 42 x 21mm
detector/amp pcb 54 x 42 x 21mm
attenuator: 90g
detector/amp: 100g
H/book Number:-50-025301HBKM
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Maintenance Handbook
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5.5.2.3 Drg. N. 17-001101, ACG Detector Assembly
H/book Number:-50-025301HBKM
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Maintenance Handbook
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5.5.2.4 Drg. N. 17-001171, AGC Detector Circuit Diagram
H/book Number:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
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5.5.2.5 Drg. N. 17-001171C, AGC Detector Parts List
H/book Number:-50-025301HBKM
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5.5.2.6 Drg. N. 17-001201, AGC Attenuator Assembly Drawing
H/book Number:-50-025301HBKM
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5.5.2.7 Drg. N. 17-001270, AGC Attenuator Circuit Diagram
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5.5.2.8 Drg. N. 17-001270C, AGC Attenuator Parts List
All other modules in this shelf are described elsewhere in this document.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
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6. INSTALLATION
6.1 Initial Installation Record
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.
Installation will be a matter of securing each shelf into its appropriate place in the rack
cabinet, connecting all the cables (RF, Antennas, DC and alarm ) to their correct
ports/connectors and system testing (at the customer’s discretion) to prove the original
specification. Power should not be applied until all connections have been double-checked
and verified.
Refer to the system drawing(s) in section 4. for cabling details.
H/book Number:-50-025301HBKM
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Maintenance Handbook
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7. MAINTENANCE
7.1 General Procedures
7.1.1 Basic Fault Finding
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
within shelves or trays and all housed within a standard 19” rack type cabinet.
Transmissions from the main base stations are passed though the system (via air interface
antennas) 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 Cell Enhancer Management System,
if fitted), or locally with the front panel LED’s. The green LED on the front panels of
shelves containing active components should be illuminated, while the red alarm indicator
should be off.
If an Alarm is on, then that individual shelf must be 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.
H/book Number:-50-025301HBKM
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7.1.2 Downlink
Confirm that there is a signal at the expected frequency and strength from the base station. If
this is not present then the fault may lay outside the system. To confirm this, inject a
downlink frequency signal from a known source at the master site BTS input and check for
output at the remote site feeder output.
If a signal is not received at the output it will be necessary to follow the downlink path
through the system to find a point at which the signal is lost. The expected downlink output
for the given input can be found in the end-to-end test specification.
7.1.3 Uplink
Testing the uplink involves a similar procedure to the downlink except that the frequencies
used are those transmitted by the mobile equipment.
7.1.4 Fault repair
Once a faulty component has been identified, a decision must be made on the appropriate
course to carry out a repair. A competent engineer can quickly remedy typical faults such as
faulty connections or cables. The exceptions to this are cable assemblies connecting
bandpass filter assemblies that are manufactured to critical lengths to maintain a 50-ohm
system. Care should be taken when replacing cables or connectors to ensure that items are of
the correct specification. The repair of component modules such as amplifiers and bandpass
filters will not usually be possible in the field, as they frequently require specialist
knowledge and test equipment to ensure correct operation. It is recommended that items of
this type are replaced with a spare unit and the faulty unit returned to AFL for repair.
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7.1.5 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.
7.1.6 Service Support
Advice and assistance with maintaining and servicing this system are available by contacting
Aerial Facilities Ltd.
7.2 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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7.3 Care of Modules
7.3.1 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.
7.3.2 Module Removal (LNA’s, general procedure):
The following general rules should be followed to remove a module:
1 Remove power to the unit
2 Remove all visible connectors (RF, DC & alarm)
3 Release module retaining screws.
4 Slowly but firmly, pull the module straight out of its position. Take care not to twist/turn
the module during withdrawal. (When the module is loose, care may be needed, as there
may be concealed connections underneath).
7.3.3 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.
7.3.4 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.
7.3.5 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
7.3.6 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 antistatic 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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
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Date:-04/07/2003
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APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS
GENERAL INFORMATION
Site Name: Client Name:
Date: AFL Equip. Model N.
ANTENNA SYSTEMS
Model Gain Azimuth Comments
A - Service Antenna
B – Donor Antenna
Type Loss Length Comments
C – Service Feeder
D – Donor Feeder
INITIAL PARAMETERS
E – CE Output Power
F – Antenna Isolation
G – Input signal level from donor BTS
Operating Voltage V
DOWNLINK CALCULATIONS
Parameter Comments Value
Input signal level (G)
CE max. o/p power (E)
Gain setting
Isolation required (Gain + 10dB) dB
Service antenna gain (A)
Service antenna feeder loss (C)
Effective radiated power (ERP)
Attenuator setting CE gain-gain setting dB
E - G
E+A-C
dBm
dB
dBm
dBm
dBm
dB
dB
dB
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
E+B-D
dBm
dB
dB
dBm
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
Date:-04/07/2003
1
Page:-
69 of 69
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