Axell Wireless 50-0253SERIES UHF Signal Extender User Manual RECEIVER MULTICOUPLER

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9 Channel, Channelised
UHF Cell Enhancer
Maintenance Handbook
For
Terry Consulting
AFL Works Order Nō.:
Q10965
AFL product part Nō.:
50-025301
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
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.
1.1
1.2
1.3
1.4
1.5
2.
3.
SAFETY CONSIDERATIONS ....................................................................................................... 9
Earthing of Equipment ................................................................................................................................9
Electric Shock Hazard .................................................................................................................................9
RF Radiation Hazard...................................................................................................................................9
Chemical Hazard........................................................................................................................................10
Emergency Contact Numbers ...................................................................................................................10
OVERVIEW/SYSTEM DESCRIPTION ..................................................................................... 11
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.
4.1
5.
SYSTEM DRAWINGS .................................................................................................................. 18
Drg. Nō. 50-025381, Channelised CE System Diagram ..........................................................................18
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
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-2 of 69
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.
6.1
7.
INSTALLATION............................................................................................................................ 63
Initial Installation Record .........................................................................................................................63
MAINTENANCE............................................................................................................................ 64
7.1
General Procedures....................................................................................................................................64
7.1.1
Basic Fault Finding ..................................................................................................................................64
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-3 of 69
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
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-4 of 69
AMENDMENT LIST RECORD SHEET
Issue
Nō.
Date
04/08/2003
Incorporated
by
CMH
Page No.’s
Amended
Reason for new issue
1st Issue
Document Ref:-50-025301HBKM
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-5 of 69
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-6 of 69
Glossary of Terms
Repeater or
Cell Enhancer
Band Selective Repeater
Channel Selective
Repeater
BTS
C/NR
Downlink (D.L.)
Uplink (U.L.)
EMC
GND
DC
AC
ID
OIP3
LED
M.S.
N/A
N/C
NF
RF
Rx
Tx
S/N
A Radio Frequency (RF) amplifier which can simultaneously
amplify and re-broadcast Mobile Station (MS) and Base
Transceiver Station (BTS) signals.
A Cell Enhancer designed for operation on a range of channels
within a specified frequency band.
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.
Base Transceiver Station
Carrier-to-Noise Ratio
RF signals transmitted from the BTS and to the MS
RF signals transmitted from the MS to the BTS
Electromagnetic Compatibility
Ground
Direct Current
Alternating Current
Identification Number
Output Third Order Intercept Point = RFout +(C/I)/2
Light Emitting Diode
Mobile Station
Not Applicable
No Connection
Noise Figure
Radio Frequency
Receiver
Transmitter
Serial Number
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-7 of 69
Key to AFL RF Module Drawing Symbols
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-8 of 69
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 50Ω, and that of free space at 377Ω, which would
severely mitigate against the efficient radiation of RF power. Radio frequency burns could
also be a hazard, if any RF power carrying components were to be carelessly touched!
Antenna positions should be chosen to comply with requirements (both local & statutory)
regarding exposure of personnel to RF radiation. When connected to an antenna, the unit is
capable of producing RF field strengths, which may exceed guideline safe values especially if
used with antennas having appreciable gain. In this regard the use of directional antennas
with backscreens and a strict site rule that personnel must remain behind the screen while the
RF power is on, is strongly recommended.
Where the equipment is used near power lines, or in association with temporary masts not
having lightning protection, the use of a safety earth connected to the case-earthing bolt is
strongly advised.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-9 of 69
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
Fax
e-mail
+44 (0)1494 777000
+44 (0)1494 777002
qa@aerial.co.uk
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-10 of 69
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-11 of 69
3.
SPECIFICATION
9 Channel Channelised Cell Enhancer 50-025301 Parts Lists
3.1
AFL Part Nō.
50-025302
50-025303
50-025304
50-025305
50-025306
3.1.1
Description
VTA-Downlink Duplexer Shelf
VTA-Downlink Amplifier Shelf
VTA-Downlink Channel Shelf
VTA-Uplink Duplexer Shelf
VTA-Uplink Amplifier Shelf
Qty.
VTA-Downlink Duplexer Shelf 50-025302 Parts List
02-011204
02-013401
19-001021
19-001024
91-020004
6P TETRA C/L FILT (NARROW) SMA
6P CL FLTR(0.5 min BW)LARGE SMA ASSY
4U 19" UNIT 400 DEEP CHASSIS + BKT
4U 19" UNIT FRONT PANEL FAB
N JACK PANEL UT-141
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-12 of 69
3.1.2
VTA Downlink Amplifier Shelf 50-025303 Parts List
AFL Part Nō.
05-002603
10-000701
11-006102
11-007302
11-007402
12-002201
12-002220
12-004201
13-001702
50-012820
50-012822
50-012825
50-027720
80-008902
80-032320
80-090822
91-030002
91-100003
91-130001
91-520003
91-600014
91-600015
91-700017
93-540035
96-300054
96-500005
96-700002
96-700005
97-400002
Description
UHF 3dB SPLITTER SMA
1/4W0-30dB SWITCHED ATTENUATOR
LNA 380-500MHz 1W WITH RELAY
LNA. 380-500MHz 20dB (C/W RELAY) GA
LNA. 380-500MHz 30dB (C/W RELAY) GA
3 STAGE AMPLIFIER ALARM BOARD
3 STAGE ALARM PCB COVER
PWR AMP.450MHz 20W version CLASS A
VOLTAGE REGULATOR Board 12V
CCE RACK MOUNTED 8U CHASSIS
CCE RACK MOUNTED LID
CCE RACK MOUNTED HEATSINK BRACKET
RACK MTD CHAN C.E. MODIFIED HEATSIN
24V RELAY PCB ASSEMBLY
10W PA HEATSINK (NEEDS 17-000526)
C/E 8U FRONT PANEL, AFL (RAL7035)
N ADAPTOR PANEL FEMALE:FEMALE
SMA PLUG ELBOW UT-141
SMA ADAPT 'T' ALL FEMALE 3 GHZ
POWER SWITCHD/FUSED MAINS INL.
'D' 9 WAY SOCKET S/B (NON FILTERED)
'D' 9 WAY PLUG S/B (NON FILTERED)
ICD 15 WAY 0.1' CONNECTOR
1K3 0.25W 1% RES MRS25 M:F
24V 17A PSU 400W (XP BCC)
DC INPUT FILTERS
LED.GREEN 5mm SEALED IP66
LED.RED 5mm SEALED IP66
HANDLE TYPE H6803 4U.[ALLOY]
Qty.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-13 of 69
3.1.3
VTA Downlink Channel Shelf 50-025304 Parts List
05-002603
05-003302
05-003401
17-002101
17-003022
17-003023
17-003024
17-003025
17-003028
17-003029
17-010601
97-000002
97-600001
97-600002
3.1.4
UHF 3dB SPLITTER SMA
4 WAY SPLITTER GSM 900MHz
4 WAY SPLITTER LOW POWER
CHANNEL CONTROL MODULE
MODULE PATTERNED LEAVE
SUBRACK SIDE PANEL
SUBRACK REAR BRACKET
BOTTOM MODULE GUIDE
MODULE SQUARE LEAVE
TOP MODULE GUIDE
CHAN MOD 480MHz, 15kHz B/W
BLACK MODULE CAGE RUNNER
SUBRACK FRONT HORIZ
SUBRACK M2.5 STD TAP
16
VTA Uplink Duplexer Shelf 50-025305 Parts List
02-011204
02-013401
19-001021
19-001024
91-020004
6P TETRA C/L FILT (NARROW) SMA
6P CL FLTR(0.5 min BW)LARGE SMA ASSY
4U 19" UNIT 400 DEEP CHASSIS + BKT
4U 19" UNIT FRONT PANEL FAB
N JACK PANEL UT-141
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-14 of 69
3.1.5
VTA Uplink Amplifier Shelf 50-025306 Parts List
02-011204
02-013401
10-000701
11-006102
11-007302
11-007402
12-016301
13-001702
13-003011
17-001101
17-001201
50-012820
50-012822
50-012825
50-027720
80-008902
80-032320
80-090822
91-030002
91-100003
91-130001
91-520003
91-600014
91-600015
93-540035
96-300054
96-500005
96-700002
96-700005
97-400002
6P TETRA C/L FILT (NARROW) SMA
6P CL FLTR(0.5 min BW)LARGE SMA ASSY
1/4W0-30dB SWITCHED ATTENUATOR
LNA 380-500MHz 1W WITH RELAY
LNA. 380-500MHz 20dB (C/W RELAY) GA
LNA. 380-500MHz 30dB (C/W RELAY) GA
PA 380-470MHz 20W CLASS A
VOLTAGE REGULATOR Board 12V
DC/DC CONVERTER 24-12V 8A PCB ASSY
CELL ENHANCER AGC DETECTOR/AMP ASS
C/E AGC UNIT ATTENUATOR ASSY
CCE RACK MOUNTED 8U CHASSIS
CCE RACK MOUNTED LID
CCE RACK MOUNTED HEATSINK BRACKET
RACK MTD CHAN C.E. MODIFIED HEATSIN
24V RELAY PCB ASSEMBLY
10W PA HEATSINK (NEEDS 17-000526)
C/E 8U FRONT PANEL, AFL (RAL7035)
N ADAPTOR PANEL FEMALE:FEMALE
SMA PLUG ELBOW UT-141
SMA ADAPT 'T' ALL FEMALE 3 GHZ
POWER SWITCHD/FUSED MAINS INL.
'D' 9 WAY SOCKET S/B (NON FILTERED)
'D' 9 WAY PLUG S/B (NON FILTERED)
1K3 0.25W 1% RES MRS25 M:F
24V 17A PSU 400W (XP BCC)
DC INPUT FILTERS
LED.GREEN 5mm SEALED IP66
LED.RED 5mm SEALED IP66
HANDLE TYPE H6803 4U.[ALLOY]
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-15 of 69
3.2
Technical Specification
PARAMETER
Downlink Frequency Range:
Single Downlink Channel Frequency:
Uplink Frequency Range:
Single Uplink Frequency:
Channel Bandwidth selectivity:
Number of Channels:
Number of ports:
RF Connectors:
Impedance:
VSWR:
Sensitivity:
Downlink Output Power:
Uplink Output Power:
Uplink TOI:
Downlink TOI:
RF level per carrier:
Passband ripple:
Noise figure:
Gain:
Gain adjustment:
In band spurious:
Spurious up to 3GHz:
Input AC Supply:
Consumption:
Alarms:
(Volt-free relay contacts)
MTBF:
Housing:
SPECIFICATION
491.4-492.2MHz
485.5875MHz
488.4-489.6MHz
485.5875MHz
12.5kHz adjacent channel >20dB
25kHz adjacent channel >80dB
N type, female
50Ω
Better than 1.5:1
0.35 microvolts @ 12dB SINAD
40 Watts
20Watts
50dBm
50dBm
>+23dBm
<±1.5dB
<6dB (@max gain)
96dB
0-30dB (in 2dB steps)
Better than –36dBm
Better than –90dBc
120V AC
300 Watts
Amplifiers
Channel phase unlock
PSU Failure
80,000 Hrs.
19” Rack mounted
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-16 of 69
3.3
Mechanical Specification
PARAMETER
SPECIFICATION
Height: Eurorack Shelves(1U=44.5mm)
Case Size:
Width: 19"
Depth: <500mm
(excluding heatsinks, connectors, handles and feet)
operational: -10°C to +55°C
Temperature Range:
storage: -40°C to +70°C
Weight: <15kg*
Humidity: 5 – 95% non-condensing
RF Connectors: N type female
Environmental Protection: IP54
Case: Alocrom
Finish:
Heatsinks: Matt black
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-17 of 69
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-18 of 69
THIRD ANGLE PROJECTION
DOWNLINK
ANTENNA
No
1A
DE S CRI P TION
PRODUCTION ISSUE
UPLINK
ANTENNA
BANDPASS FILTER
491.4-492.2MHz
02-011204
BANDPASS FILTER
485.5875MHz
02-013401
IS S UE
LNA
11-007402
LNA
11-007402
DA TE
30/07/03
MNR
CHK D
DRA WN
BANDPASS FILTER
488.4-489.6MHz
02-013401
485. 5875MH z
B / W=15kH z
FR E QU E N C Y P R OG R A MMI N G D A TA
GD
dB
0-30dB
ATTENUATOR
10-000701
dB
0-30dB
ATTENUATOR
10-000701
LNA
11-007302
LNA
11-007302
50-025304
COMBINER
05-002603
COMBINER
05-003401
NO DE CIMA L P LA CE ± 1mm
ONE DE CIMA L P LA CE ± 0.3mm
TWO DE CIMA L P LA CE S ± 0.1mm
TOLE RA NCE S
S CA LE
THIS IS A P ROP RIE TA RY DE S IGN OF A E RIA L FA CILITIE S LTD.
RE P RODUCTION OR US E OF THIS DE S IGN B Y OTHE RS IS
P E RMIS S I B LE ONLY IF E X P RE S S LY A UTHORIS E D I N WRI TING
B Y A E RIA L FA CI LITIE S LTD.
PA
12-016301
LNA
11-006102
FR E QU E N C Y P R OG R A MMI N G D A TA
B / W=15kH z
491. 4125MH z
FR E QU E N C Y P R OG R A MMI N G D A TA
B / W=15kH z
492. 0125MH z
FR E QU E N C Y P R OG R A MMI N G D A TA
B / W=15kH z
491. 6625MH z
FR E QU E N C Y P R OG R A MMI N G D A TA
B / W=15kH z
492. 1750MH z
FR E QU E N C Y P R OG R A MMI N G D A TA
B / W=15kH z
491. 6175MH z
FR E QU E N C Y P R OG R A MMI N G D A TA
B / W=15kH z
492. 0375MH z
FR E QU E N C Y P R OG R A MMI N G D A TA
B / W=15kH z
491. 8375MH z
FR E QU E N C Y P R OG R A MMI N G D A TA
B / W=15kH z
491. 6375MH z
8 x CHANNEL MODULE
17-010601
A LL DIME NS IONS A RE IN mm
UNLE S S OTHE RWIS E S TA TE D
PB
APPD
CHANNEL MODULE
17-010601
30/07/03
DA TE
AGC
AGC DET.
17-001101
AGC
AGC DET.
17-001101
MNR
SPLITTER
05-002603
SPLITTER
05-003401
BANDPASS FILTER
485.5875MHz
02-013401
dB
ATTENUATOR
10-000701
0-30dB
dB
0-30dB
ATTENUATOR
10-000701
1:1
dB
AGC ATT.
17-001201
dB
AGC ATT.
17-001201
LNA
11-007302
LNA
11-007302
LNA
11-007402
LNA
11-007402
LNA
11-006102
50-025306
LNA
11-007402
Tel : 01494 777000
Fax : 01494 777002
England
CUS TOME R
TITLE
10
UPLINK
LCX
11
DOWNLINK
LCX
10
DRA WING No
SYSTEM DIAGRAM
11
50-025381
11 CHANNEL CHANNELISED CE (CSIC)
50-025302
BANDPASS FILTER
491.4-492.2MHz
02-011204
BANDPASS FILTER
485.5875MHz
02-013401
50-025305
BANDPASS FILTER
488.4-489.6MHz
02-013401
BANDPASS FILTER
485.5875MHz
02-013401
50-025303
COMBINER
05-002603
Aerial Facilities Limited
BANDPASS FILTER
488.4-489.6MHz
02-013401
LNA
11-007402
PA
12-004201
PA
12-004201
BANDPASS FILTER
485.5875MHz
02-013401
SPLITTER
05-002603
LNA
11-006102
12
12
4.
SYSTEM DRAWINGS
4.1
Drg. Nō. 50-025381, Channelised CE System Diagram
5.
SUB-UNIT MODULES
VTA Downlink Duplexer Shelf 60-025302 (4U chassis)
5.1
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 50Ω load at the input
and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life
and require no maintenance. Should a filter be suspect, it is usually most time efficient to
replace the module rather than attempt repair or re-tuning.
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
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
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 50Ω 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:-1
Date:-04/07/2003
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
Frequency range:
Bandwidth:
Gain:
1dB compression point:
IP3:
I/O return loss:
Noise figure:
Supply requirement:
Consumption:
Temperature
storage:
range
operation:
SPECIFICATION
380-500MHz
<150MHz
15.5dB ±0.5dB
31dBm
46dBm
>18dB
<1.3dB
10 – 24V, DC
510-540mA @ (10 – 24V)
-20°C to +55°C
-40°C to +70°
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-21 of 69
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
C1
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-22 of 69
THIRD ANGL E PROJECTION
RF IN
No
1A
R1
IS S UE
C2
8.2pF
DE S CRIP TI ON
PRODUCTION ISSUE
910R
R2
5R6
910R
R3
DA TE
23/01/02
18nH
L1
18nH
L2
MNR
CHK D
DRA WN
C3
3.3pF
L3
18nH
L4
18nH
R4
100R
C8
1nF
APPD
IB
2 3/01 /02
DA TE
A LL DIME NS IONS A RE IN mm
UNLE S S OTHE RWIS E S TA TE D
CB
MNR
6.8pF
C4
R6
56R
R12
10K
R8
10K
NO DE CIMA L P LA CE ± 1mm
ONE DE CIMA L P LA CE ± 0. 3mm
TWO DE CI MA L P LA CE S ± 0.1mm
TOLE RA NCE S
L9
180nH
R13
0R0
R9
0R0
L7
180nH
R14
R10
S CA LE
N.T.S
ARE NOT USED IN THIS BUILD
T2
CYL5
ANY COMPONENTS IN
L6
6.8nH
L5
6.8nH
R5
56R
T1
CYL5
THIS IS A P ROP RIE TA RY DE S IGN OF A E RIA L FA CILITI E S LTD.
RE P RODUCTION OR US E OF THI S DE S I GN B Y OTHE RS I S
P E RMIS S IB LE ONLY I F E X P RE S S LY A UTHORIS E D I N WRITI NG
B Y A E RI A L FA CI LI TI E S LTD.
220pF
C7
R11
R7
C6
1nF
220pF
C5
L8
L10
7.5nH
C11
220pF
C9
220pF
7.5nH
220pF
C14
220pF
C13
L11
18nH
L12
18nH
Tel : 01494 777000
Fax : 01494 777002
England
Aerial Facilities Limited
C12
6.8pF
C10
6.8pF
CUS TOME R
TITLE
6.8pF
C15
R15
100R
L13
C17
8.2pF
10
DRA WI NG No
(RF) CIRCUIT DIAGRAM
R17
R16
0R0
11
11-006170
11
380-500MHz 1W AMPLIFIER
18nH
L14
C16
3.3pF
18nH
10
12
(OPTIONAL)
RF OUT
RF OUT
12
5.2.3.3
Drg. Nō. 11-006170, LNA Circuit Diagram (RF)
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
CHKD
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-23 of 69
APPD
IB
23/01/02
DATE
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
CB
MNR
DRAWN
RF
IN
-ve
+6V 220mA
-ve
+6V 220mA
DC INPUT
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
SCALE
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
RF PCB
FOR CIRCUIT DIAGRAM
SEE 11-006170
CON2 - J5
CON2 - J4
Tel : 01494 777000
Fax : 01494 777002
DC PCB
+8V
SCHEMATIC DIAGRAM
DRAWING.No
RF
OUT
DATE
23/01/02
OC GOOD/0v BAD
TTL ALARM/0v GOOD
TTL VOLTAGE SET
BY
MNR
RELAY CONTACT GOOD
RELAY COMMON
RELAY CONTACT BAD
GROUND
+12V DC I/P
9 WAY 'D'
PIN OUTS
CON1
11-006171
ISSUE
DESCRIPTION
PRODUCTION ISSUE
9 CON1
8 CON1
7 CON1
5 CON1
4 CON1
3 CON1
2 CON1
380-500MHz 1W AMPLIFIER
CUSTOMER
TITLE
No
1A
FOR CIRCUIT DIAGRAM
SEE 11-003971
REG3
LM7808CT
= ONLY APPLIES TO 11-006802
J5 2
J5 1
J4 2
J4 1
DC OUTPUT
Aerial Facilities Limited
England
5.2.3.4
Drg. Nō. 11-006171, LNA Schematic Diagram (DC)
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
Frequency range:
Bandwidth:
Gain:
1dB Compression Point:
3rd order intercept:
Input/Output return loss:
Noise figure:
Connectors:
Supply:
operational:
Temperature range:
storage:
Weight:
Size:
5.2.4.3
SPECIFICATION
380-500MHz
<140MHz
20-22dB
+23.5dB (typical)
+36dB (typical)
>20dB
<1.3dB
SMA female
200-230mA @ 24V DC
-10°C to +55°C
-30°C to +70°C
<300gms
90 x 55 x 30.2 (case only)
Technical Specification (11-007402)
PARAMETER
Frequency range:
Bandwidth:
Gain:
1dB Compression Point:
3rd order intercept:
Input/Output return loss:
Noise figure:
Connectors:
Supply:
operational:
Temperature range:
storage:
Weight:
Size:
SPECIFICATION
380-500MHz
<140MHz
30-32dB
+22dBm (typical)
+34-35dBm (typical)
>20dB
<1.3dB
SMA female
300-330mA @ 24V DC
-10°C to +55°C
-30°C to +70°C
<300gms
90 x 55 x 30.2 (case only)
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-24 of 69
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
11-007302
380-500MHz
20dB 10-24V DC
********
**/**/20**
DE V ICE S
0086
AFL
19
OUT
IN
34
IN 4 PLACES
see note 2
28
see note 2
31
CHKD
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-25 of 69
APPD
IB
9/7/02
DATE
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
CB
DBS
DRAWN
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
SCALE
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
1.5:1
2. LIDS,ITEMS 2 & 3 AND LABELS,ITEMS 31,34 & 35,TO BE FITTED ON TEST
OR
E LE C TR OS TA TI C
S E N S I TI V E
FOR H A ND LI N G
OB S E R V E P RE C A U TI ON S
1. SOLDER JOINTS TO BE MADE USING
REF.
FREQ.
GAIN
S/N
DATE
AFL
see note 2
ATTENTION
35
22
21
CPL1
W7
C2
C1
RL1
England
W2
L5 R4
TR1 +
C8 R16
27
L3
R2 C9
L1
W5
30
Aerial Facilities Ltd
C5
C4
20
C21 W6
15
26
IN 2 PLACES
R1
R19
RF OUT
R39
Tel : 01494 777000
Fax : 01494 777002
24
CON1
REG3
J1
J3 J2
AFL
COMPONENTS TO BE ADDED TO 11-003912,ITEM 15,DC PCB SUB-ASSEMBLY
LABEL DETAILS - SCALE 1:1
J31
J32
C12
27
No
1A
10
25
24
33
ISSUE
DESCRIPTION
PRODUCTION ISSUE
17
DC PCB
25
32
LOW NOISE AMPLIFIER 380-500MHz
23
IN 3 PLACES
CUSTOMER
DRG.No
11-007302
(20dB) ASSEMBLY DRAWING (WITH RELAY)
TITLE
W1
16
R50 R49
R43 R44
DATE
9/7/02
RF PCB
BY
DBS
5.2.4.4
Drg. Nō. 11-007302, LNA Assembly With Alarm Relay
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
CHKD
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-26 of 69
APPD
IB
5/7/02
DATE
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
CB
DBS
DRAWN
RF INPUT
51R
R1
11303-3
CP L1
C4
1nF
C3
3.3pF
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
L4
330nH
Ø1.6x6 turns
SCALE
L2
CLY 2
TR2
CLY 2
1nF
TR1
Ø1. 6x6 t urns
L1
L3
330nH
L5
C5
C6
R6
10K
R3
100R
1nF
1nF
R7
560R
1nF
C13
1nF
C12
L6
C10
R4
560R
100nH
100nH
1nF
C9
10K
1nF
R5
R2
0R0
100R
W7
0R0
R19
C1
C7
3.3pF
RF OUTPUT
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
CP L2
11303-3
R8
51R
R9
R11
W2
0R0
W1
0R0
W5
0R0
Tel : 01494 777000
Fax : 01494 777002
Aerial Facilities Limited
England
HE A DE R P IN
J11
HE A DE R P IN
J12
HE A DE R P IN
J32
HE A DE R P IN
J31
0R0
W6
0R0
R10
CUSTOMER
TITLE
2A
No
1A
ISSUE
DESCRIPTION
PRODUCTION ISSUE
ECN2718
DRAWING.No
11-007370
(20dB) RF PCB CIRCUIT DIAGRAM
LOW NOISE AMPLIFIER 380-500MHz
ATTENUATOR GROUP
(Select values on Test)
DATE
5/7/02
19/9/02
BY
DBS
DBS
5.2.4.5
Drg. Nō. 11-007370, LNA RF Circuit Diagram
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
CHKD
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-27 of 69
APPD
IB
8/7/02
DATE
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
CB
DBS
DRAWN
RF
IN
-ve
5V 75mA
-ve
5V 75mA
DC INPUT
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
SCALE
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
RF PCB
FOR CIRCUIT DIAGRAM
SEE 11-007370
J11 - J12
J31 - J32
J12 2
J11 1
J32 2
J31 1
DC OUTPUT
Tel : 01494 777000
Fax : 01494 777002
Aerial Facilities Limited
England
DC PCB
+8V
ISSUE
DESCRIPTION
PRODUCTION ISSUE
9 CON1
8 CON1
7 CON1
5 CON1
4 CON1
3 CON1
2 CON1
DRAWING.No
RF
OUT
DATE
8/7/02
OC GOOD/0v BAD
TTL ALARM/0v GOOD
TTL VOLTAGE SET
BY
DBS
RELAY CONTACT GOOD
RELAY COMMON
RELAY CONTACT BAD
GROUND
10-24V DC I/P
9 WAY 'D'
PIN OUTS
CON1
11-007371
(20dB) RF SCHEMATIC DIAGRAM
LOW NOISE AMPLIFIER. 380-500MHz
CUSTOMER
TITLE
No
1A
FOR CIRCUIT DIAGRAM
SEE 11-003971
REG3
LM7808CT
5.2.4.6
Drg. Nō. 11-007371, LNA DC Wiring Diagram
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
CHKD
V _IN
J1
J5
J4
J3
J4
J5
J3
J1
P1
J2
>12V DC I/P
J2
C13
10u
1u
C4
ZD3
5.1V
10u
C14
C8
10u
0R
R28
C5
1u
IC3
IC2
100n
C11
100n
C17
I CL7660C
I CL7660C
100R
R38
C15
10u
C9
10u
10u
C16
10u
C10
1K
R52
1K
R47
C7
470p
C6
10u
R40
R39
C18
1u
LM337LM
RE G2
LM337LM
RE G1
C12
1u
R41
R50
R51
R44
R43
V R1
R42
P2
R49
R45
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-28 of 69
IB
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
APPD
24/09/01
DATE
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
SCALE
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
1. * IF APPLICABLE, VALUES WILL BE DETERMINED AT A HIGHER LEVEL BOM
2. CONNECTORS J1-5 TO BE FITTED AS NECESSARY
CON 1
CON 1
CB
DJL
DRAWN
V _OUT
100n
C19
R46
1K
R48
1K
470R
R56
R55
R54
R53
I C4:A
0R
R29
I C4:B
ZD1
1.23V
120R
R2
R1
1K 8
R3
C1
1u
100K
R5
100K
R4
12
13
IC1:D
LM324M
11
14
100K
R6
THIRD ANGLE PROJECTION
100K
LM324M
IC1: A
R57
Chesham(01494)778301
Fax (01494)778910
Aerial Facilities Limited
England
120R
R11
C2
100n
1K
R7
9 -
3K 6
R12
10
R9
1K
I C1: B
D1
LL4148
D2
LL4148
CUSTOMER
TITLE
LM324M
270K
R10
LM324M
I C1: C
270K
R8
10K
R32
D3
R23
DRAWING.No
CIRCUIT DIAGRAM
11-003971
ISSUE
DESCRIPTION
DC PCB FOR LNA's AND LPA's,
No
DATE
BY
DJL
TAS
24/9/01
26/11/01
CON 1
CON 1
CON 1
PROTOTYPE ISSUE
P4
CON 1
PRODUCTION ISSUE(ECN2359)
B CW71
TR3
P5
1A
CON 1
R58
1K
AA
RL1/1
4K 7
R25
R59
DJL
4K 7
10K
B CW71
TR2
R24
CON 1
DJL
P6
P8
R22
10K
P3
RL1
17/4/02
TR1
LL4148
ZD2
3V 3
R18
22K
25/7/02
56R
R27
560R
R19
TR5
B CW71
2K 2
R17
ECN2686
P7
4K 7
R21
10K
R20
2K 4
R15
TR4
B CW71
1K
R16
ECN2518
RL1/2
B CW71
TR8
4K 7
R36
C3
1U
3K
R14
TR6
FZT751
3A
4K 7
2A
R31
4K 7
B CW71
TR7
1K
R35
R33
10K
R34
LE D1
4K 7
R13
5.2.5.7
Drg. Nō. 11-003971, LNA DC Circuit Diagram
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)
2)
3)
Volt-free change over relay contacts.
Open collector NPN transistor pulls low on alarm.
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:-1
Date:-04/07/2003
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: >2x107 operations
Relay approval: BT type 56
Connector details: 15-way 0.1" pitch
operational: -10°C to +55°C
Temperature range:
storage: -40°C to +70°C
74 x 56mm (3 stage)
PCB Size:
54 x 56mm (1 stage)
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-30 of 69
5.2.6.3
List
Drg. Nō. 12-002201, 3 Stage Alarm Board Assembly Drawing & Parts
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-31 of 69
5.2.6.4
Drg. Nō. 12-002270, 3 Stage Alarm Board Circuit Diagram
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-32 of 69
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Generic Rack Shelf Enclosure Alarm Wiring Sketch
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-33 of 69
D1
1.23v
S R12D
C1
1uF
R2
120R
R1
1K 8
I C3
IC2
IC1 , IC2 & IC3 = LM324A M
A LL DIODE S = LL4148 UNLE S S MA RK E D OTHE RWIS E
R4
3K 6
R3
120R
HI
R6
100K
CON N
R5
100K
CON N
MONITOR 1
INP UT
R7
100K
LOW
IC3
11
R8
100K
C2
100n
R11
1K
V CC
+7. 5v
0v
10
I C3
R12
13
12
270K
R9
1K
+7. 5v
IC3
270K
R10
14
No
HI
R13
100K
IS S UE
D E S C R I P TI ON
CR0508
P RODUCTION I S S UE
P RODUCTION I S S UE
2A
4K 7
R42
D3
D2
C7
1u
R14
100K
MONITOR 2
I NP UT
LOW
R15
100K
D A TE
14/1/94
11/ 9/ 93
29/8/00
CON N
CON N
I C2
BY
MRB
MRB
MNR
RB
I C1
RB
11/ 8/ 93
APPD
D A TE
C3
100n
10
A LL D I ME N S I ON S A R E I N mm
U N LE S S OTH E R WI S E S TA TE D
CHK D
MRB
D R A WN
11
100K
R16
10
10
R20
IC2
270K
IC2
270K
13
12
R18
4K 7
R29
V CC
+7.5v
14
12
R30
2K 2
D5
D4
11
N O D E C I MA L P LA C E ± 1mm
ON E D E C I MA L P LA C E ± 0. 3mm
TWO D E C I MA L P LA C E S ± 0. 1mm
TOLE R A N C E S
B Y A E R I A L FA C I LI TI E S LTD .
12
S C A LE
N.T.S
TH I S I S A P R OP R I E TA R Y D E S I GN OF A E R I A L FA C I LI TI E S LTD .
R E P R OD U C TI ON OR U S E OF TH I S D E S I GN B Y OTH E R S I S
P E R MI S S I B LE ON LY I F E X P R E S S LY A U TH OR I S E D I N WR I TI N G
R19
1K
R17
1K
11
R21
100K
HI
13
RL2/ 2
NOT US E D
B CW71
R22
100K
MONI TOR 3
INP UT
TR1
13
CON N
CON N
5.2.6.5
R23
100K
RE L
RL1
D8
+7.5v
I C1
LE D1
14
Tel : 01494 777000
Fax : 01494 777002
Aerial Facilities Limited
England
LOW
14
11
15
C8
1. 0
R27
1K
RL1/2
B CW71
TR2
R25
1K
0v
R36
3K
V CC
10
13
12
R26
IC1
270K
R34
4K 7
R33
10K
IC1
270K
R28
TR4
B CW71
R38
1K
R37
2K 4
16
0v
1K
R35
CONN
CONN
CONN
B CW71
TR3
OP A MP
10
14
TR4
D7
D6
R40
LK 2
D9
3v3
16
D R A WI N G N o
CIRCUIT DIAGRAM
15
0V
CONN
A LA RM 0v
14
CONN
O/ C A LA RM
13
CONN
+5v TTL IN
12
CONN
12-002270
17
R41
22K
TTL A LA RM
11
CONN
A LA RM
CONTA CTS
2K 2
FZT751
B CW71
R39
560R
TR6
17
3 STAGE AMPLIFIER ALARM BOARD
C U S TOME R
TI TLE
R32
4K 7
R31
10K
R24
100K
C4
100n
15
LK 1
18
C6
100n
+8v TO +30v
7 CONN
18
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
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
Frequency Range:
Bandwidth:
Maximum Output Power:
Gain:
1dB Compression Point:
3rd Order Intercept Point:
VSWR:
Connectors:
Supply:
Size:
Weight:
Temperature
operational:
range:
storage:
SPECIFICATION
350 – 550MHz (tuned to spec.)
20MHz (tuned to spec.)
>20W (each)
30dB
<+43dBm
<+54dBm
better than 1.45:1
SMA female
3.50A @ 24V DC
276 x 78 x 40mm (ex. Cons. & h’sink)
1.5 kg (approx., excl. h’sink)
-10°C to +55°C
-40°C to +70°C
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-35 of 69
5.2.7.3
Drg. Nō. 12-004201, PA General Assembly
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-36 of 69
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
RF INPUT
C8
220pF
C1
56pF
C3
1uF
C2
1-14pF
FB1
IN
REG.1
LM337T
C4
1-14pF
C5
47pF
R1
1R2
C6
47pF
C7
1nF
TR1
TP5012
ARE 50 ohm STRIPLINES
L2
1uH
L1
OUT
ADJ
FB2
C10
1-14pF
L3
R2
1KR
ALARM
REF
R3
470R
CHKD
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-37 of 69
APPD
BB
3/8/98
DATE
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
GB
DBS
DRAWN
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
SCALE
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
REFER TO 12-004211 FOR COMPONENT POSITIONS EXCEPT FOR THOSE MARKED
(THEY ARE SPECIFIED ON 12-004201)
CONDUCTORS SHOWN THUS:
C9
1uF
C11
1-14pF
C12
56pF
ALARM
DET.1
C14
4.7uF
C13
1-14pF
C28
18pF
L4
OUT
C15
1-14pF
IN
C29
18pF
C20
1uF
R5
R47
C16
27pF
C17
27pF
Tel: (01494) 777000
Fax (01494)777002
C21
56pF
C19
56pF
D1
2OCTQ45
Aerial Facilities Limited
England
FB3
REG.2
LM337T
ADJ
+24v
C30
1000pF
C18
1uF
No
1A
1B
FB4
ISSUE
DESCRIPTION
CUSTOMER
DRAWING.No
CIRCUIT DIAGRAM
12-004270
DATE
3/8/98
C26
1-14pF
BY
PDC
DBS
RF OUTPUT
16/5/00
C25
1-14pF
C27
56pF
PRODUCTION ISSUE
C24
15pF
C23
15pF
ALARM
DET.2
CR1679
C22
1-14pF
L5
R4
1KR
POWER AMPLIFIER 450MHz 10/20W CLASS A
TITLE
TR2
PTB20031
C31
1nF
5.2.7.4
Drg. Nō. 12-004270, PA Circuit Diagram
5.2.7.5
CIRC.
REF.
Drg. Nō. 12-004270C1, PA Parts List(1)
C1
93-200006
56pF CHIP CAP 10% TOL.(MIN)
C2
93-130023
PCB MOUNT AIR TRIMMER 1-14pF
C3
93-240003
1uF TANTALUM CHIP CAP 35V
C4
93-130023
PCB MOUNT AIR TRIMMER 1-14pF
C5
REFER TO GA 12-004201 FOR DETAILS
C6
REFER TO GA 12-004201 FOR DETAILS
C7
93-200020
1nF CHIP CAP 63V 10%
C8
93-200014
220pF CHIP CAP 10% TOL (MIN)
C9
93-240004
1uF TANTALUM CHIP CAP 35V
NOT FITTED
NOT FITTED
C11
93-130023
PCB MOUNT AIR TRIMMER 1-14pF
C12
93-200006
56pF CHIP CAP 10% TOL.(MIN)
C13
93-130023
PCB MOUNT AIR TRIMMER 1-14pF
C C14
93-240006
4.7uF TANTALUM CHIP CAP 35V
C15
93-130023
PCB MOUNT AIR TRIMMER 1-14pF
C16
REFER TO GA 12-004201 FOR DETAILS
DESCRIPT ION
AFL ST OCK REF.
C10
C17
REFER TO GA 12-004201 FOR DETAILS
C18
93-240003
1uF TANTALUM CHIP CAP 35V
C19
93-200006
56pF CHIP CAP 10% TOL.(MIN)
C20
93-240004
1uF TANTALUM CHIP CAP 35V
C21
93-200006
56pF CHIP CAP 10% TOL.(MIN)
C22
93-130023
PCB MOUNT AIR TRIMMER 1-14pF
C23
93-200005
15pF CHIP CAP 10% TOL.(MIN)
C24
93-200005
15pF CHIP CAP 10% TOL.(MIN)
C25
93-130023
PCB MOUNT AIR TRIMMER 1-14pF
C26
93-130023
PCB MOUNT AIR TRIMMER 1-14pF
C27
93-200006
56pF CHIP CAP 10% TOL.(MIN)
C28
93-200004
18pF CHIP CAP 10% TOL.(MIN)
C29
93-200004
18pF CHIP CAP 10% TOL.(MIN)
C30
93-200016
1000pF (1nF) CHIP CAP 10% TOL.(MIN)
C31
REFER TO GA 12-004201 FOR DETAILS
2A
5/5/00
CR1679
1A
5/8/98
PROD. ISS.
DAT E
ISSUE
CHANGE No
ISSUE
DAT E
CHANGE No
ISSUE
DAT E
CHANGE No
ISSUE
DAT E
CHANGE No
TITLE
POWER AMPLIFIER,450MHz,10/20W
Aerial Facilities Limited
DRAWN
DATE
PDC
5/8/98
CIRCUIT COMPONENT LIST
APPD
CHKD
GB
CUSTOMER
BB
COMPONENT LIST FOR
12-004270C1
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-38 of 69
5.2.7.6
CIRC.
REF.
Drg. Nō. 12-004270C2, PA Parts List(2)
DESCRIPT ION
AFL ST OCK REF.
TR1
REFER TO GA 12-004201 FOR DETAILS
TR2
REFER TO GA 12-004201 FOR DETAILS
REG1
94-300002
LM337T, VOLTAGE REGULATOR
REG2
94-300002
LM337T, VOLTAGE REGULATOR
D1
94-120006
2OTQ45 45V DUAL SCHOTTKY DIODE
R1
93-540075
1R2 2.5W RESISTOR
R2
93-630037
1KR CHIP RESISTOR
R3
93-630032
470R CHIP RESISTOR
R4
93-630037
1KR CHIP RESISTOR
R5
93-540083
47R 6W RESISTOR
L1
90-500012
93-910001
1.25 ENAMELLED COPPER WIRE
FERRITE BEAD
L2
93-400004
1.0uH CHOKE SIGMA SC10 SERIES
L3
90-500012
93-910001
1.25 ENAMELLED COPPER WIRE
FERRITE BEAD
90-500012
1.25 ENAMELLED COPPER WIRE
93-910001
FERRITE BEAD
90-500012
1.25 ENAMELLED COPPER WIRE
93-910001
FERRITE BEAD
L4
L5
2A
5/5/00
CR1679
1A
5/8/98
PROD. ISS.
DAT E
ISSUE
CHANGE No
ISSUE
DAT E
CHANGE No
ISSUE
DAT E
CHANGE No
ISSUE
DAT E
CHANGE No
TITLE
POWER AMPLIFIER,450MHz,10\20W
Aerial Facilities Limited
DRAWN
DATE
PDC
5/8/98
CIRCUIT COMPONENT LIST
APPD
CHKD
GB
CUSTOMER
COMPONENT LIST FOR
BB
12-004270C2
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-39 of 69
5.2.7.7
Drg. Nō. 12-003670, PA to Alarm Wiring Details
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
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
Operating Voltage:
Output Voltages:
Output Current:
Connections:
Temperature
operational:
range:
storage:
PCB Size:
SPECIFICATION
21 – 27V DC
12.4V (typical)
1.0A (maximum per o/p)
Screw Terminal Block
-10ΒC to +55ΒC
-40ΒC to +70ΒC
47 x 30mm
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-41 of 69
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
MNR
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-42 of 69
13-001725
C3 + C2
A FL Ltd
BB
APPD
12/7/00
DATE
REG1
R3R2 R1
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
GB
CHKD
DRAWN
C4
D1
ACTUAL SIZE
C1
TB1
USED ON
NOTE
24
REG1
R3 R2 R1
26
IN 2 PLACES
26
25
23
PART SECTION SHOWING
POSITION OF C/BORE
SCALE
2:1
(SEE B.o.M FOR BALLOON IDENTS)
Fax : (01494)777002
Tel : (01494)777000
England
Aerial Facilities Ltd
2: WHERE INDIVIDUAL ITEMS ARE NOT BALLOONED THE COMPONENT IS IDENTIFIED
ON BOTH THE COMPONENT LIST AND THE DRAWING BY ITS COMPONENT REF.
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
+ C2
1: ALL SOLDERED CONNECTIONS TO BE MADE USING ITEM
C4
13-001725
AFL Ltd
C3
D1
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
C1
TB1
THIRD ANGLE PROJECTION
CUSTOMER
TITLE
DESCRIPTION
PRODUCTION ISSUE
ISSUE
LM317T N.S.C/MOT VOLTAGE REG
13-001702
12.8v REGULATOR,ASSEMBLY
No
1A
94-300001
2K2 0.25W 1% RES MRS25 M:F
DRG.No
REG1
R2
DIODE 1N4003 [1N4000
240R 0.25W 1% RES MRS25 M:F
94-100006
D1
100nF 63V POLYESTER CAP FILM
2.2uF 35V TANTALUM CAP
93-540039
93-120003
C4
10uF 35V TANTALUM CAP
2.2uF 35V TANTALUM CAP
3 WAY PRINTED CIRCUIT CON
DESCRIPTION
93-540024
93-140002
C3
R1
93-140002
93-140004
C1
C2
91-700003
AFL STOCK REF.
TB1
COMP.
REF.
DATE
12/7/00
1A
ISS
BY
MNR
5.2.8.3
Drg. Nō. 13-001702, 12.8V Regulator Assembly Drawing & Parts List
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-43 of 69
BB
APPD
13/7/00
DATE
D1
C1
2u2
1N4003
VIN
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
SCALE
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
TB1 2
TB1 1
TOLERANCES
18-30V INPUT
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
GB
CHKD
MNR
DRAWN
C2
10u
ADJ
REG1
LM317T
VOUT
R2
2K2
Tel : (01494)777000
Fax : (01494)777002
England
Aerial Facilities Limited
R1
240R
C4
100n
C3
2u2
CUSTOMER
TITLE
CR1679
DESCRIPTION
12.8v OUTPUT
ISSUE
DRAWING.No
13-001771
12.8v REGULATOR, CIRCUIT DIAGRAM
No
1A
3 TB1
4 TB1
6 TB1
5 TB1
DATE
13/7/00
BY
MNR
5.2.8.4
Drg. Nō. 13-001771, 12.8V Single Regulator Circuit Diagram
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-44 of 69
5.2.9.2
Drg. Nō. 80-008970, Single Relay Board Circuit Diagram
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-45 of 69
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 operational: -10ΒC to +55ΒC
range:
storage:
-40ΒC to +70ΒC
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-46 of 69
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
Frequency range:
Bandwidth:
Rejection:
Insertion loss:
Connectors:
Weight:
operational
Temperature
range:
storage
SPECIFICATION
170 – 550MHz
280MHz
>14dB
6.5dB (in band, typical)
SMA
<1.5Kgm
-10ΒC to +55ΒC
-40ΒC to +70ΒC
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-47 of 69
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
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
25-way Connector
13
25
12
24
11
23
10
22
21
20
19
18
17
16
15
14
---
Function
Freq. bit 1 (12.5kHz)
Freq. bit 2 (25kHz)
Freq. bit 3 (50kHz)
Freq. bit 4 (100kHz)
Freq. bit 5 (200kHz)
Freq. bit 6 (400kHz)
Freq. bit 7 (800kHz)
Freq. bit 8 (1.6MHz)
Freq. bit 9 (3.2MHz)
Freq. bit 10 (6.4MHz)
Freq. bit 11 (12.8MHz)
Freq. bit 12 (25.6MHz)
Freq. bit 13 (51.2MHz)
Freq. bit 14 (102.4MHz)
Freq. bit 15 (204.8MHz)
Freq. bit 16 (409.6MHz)
Module alarm
N/C
+5V
0V
Switched 12V
0V
---
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-48 of 69
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
10
11
12
13
14
15
16
Synthesiser offset added when switch in UP position
+12.5kHz
+25kHz
+50kHz
+100kHz
+200kHz
+400kHz
+800kHz
+1.6MHz
+3.2MHz
+6.4MHz
+12.8MHz
+25.6MHz
+51.2MHz
+102.4MHz
+204.8MHz
+409.6MHz
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-49 of 69
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
Switch setting:
Switch settings
16 15 14 13 12 11 10 9 8 7 6
0 0 0 1 0 1 0 1 1 0
0 = switch
1 = switch
DOWN
UP
(on, frequency ignored)
(off, frequency added)
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-50 of 69
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-51 of 69
5.3.4.2
Drg. Nō. 17-003080, Generic Channel Module Block Diagram
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-52 of 69
5.4
VTA Uplink Duplexer Shelf (50-025305, 4U Chassis)
5.4.1
5.5
Bandpass Filters (02-011204 & 02-013401) See section 5.1.1
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
Temperature
Frequency Range
Small Signal Gain
Gain Flatness
∆Gain vs. Temperature
In/Out RL
Output Power @ 1dB
Compression Point
Output 3rd Order IP
DC Supply Voltage
DC Supply Current
Guaranteed
+25
Guaranteed
-10 to +60
380 - 470
Units
°C
18
1.7
1.0
18
MHz
dB
dB p-p Max
dB Max
dB Min
43.2
43.0
dBm Min
55.0
dBm Min
Vdc
mA Max
≥23.0
1.5
55.3
24 ± 0.5
3700 typical
3800
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-53 of 69
Issue No:-1
Date:-04/07/2003
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
Page:-54 of 69
THIRD ANGL E PROJECTION
RF I NP UT
CON 1
CON 1
A2
A1
DE S CRIP TI ON
IS S UE
PROTOTYPE ISSUE
AA
No
ECN2882
R3
SAT
CP L1
HY 45B
PRODUCTION ISSUE(ECN2737)
R4
100R
+24V
ZD2
5. 1v
R31
ZD1
5. 1v
DA TE
6/8/02
17/10/02
28/4/03
R16
3K 3
R15
1K 8
R13
330R
R33
3K 3
R32
1K 8
0R0
R14
0R0
DJL
DJL
DJL
100K
R30
330R
15p
C1
15p
C16
LM324M
IC1: A
470R
1A
0R0
R2
R5
100R
C15
100u
2 -
R55
ZD3
1. 23V
R58
1K 8
R44
2A
R1
SAT
+24V
R45
0R0
1u
C17
4.7p
R11
6K 8
R28
6K 8
11
R65
R9
6K 8
R26
6K 8
8K 2
R67
C36
100n
1K
APPD
IB
0 6/08 /02
DA TE
R10
6K 8
R27
6K 8
14
82K
R64
A LL DIME NS IONS A RE IN mm
UNLE S S OTHE RWIS E S TA TE D
MI
DJL
C2
4.7p
R12
6K 8
TR2
FZT651
CHK D
82K
R59
12
IC1:D
LM324M
13
R29
6K 8
TR5
FZT651
DRA WN
C35
100K
R56
C18
18p
C3
18p
R20
2R2
R38
1R5
R7
270R
R21
1R5
R24
270R
LM324M
C11
100u
R22
1R5
C26
100u
R39
1R5
LL4148
D2
LL4148
D1
NO DE CIMA L P LA CE ± 1mm
ONE DE CIMA L P LA CE ± 0. 3mm
TWO DE CI MA L P LA CE S ± 0.1mm
TOLE RA NCE S
680R
R8
680R
R37
2R2
IC1:B
270K
R69
LM324M
IC1:C
270K
R66
C28
100p
C10
1n
C14
100u
C25
1n
C9
100p
C13
100p
C24
100p
R23
27R
TR1
MRF9045
R6
27R
C12
47p
TR4
MRF9045
C27
47p
R48
4K 7
S CA LE
LL4148
4K 7
C29
100u
B CW71
TR12
10K
R47
R53
10K
R54
4K 7
R57
THIS IS A P ROP RIE TA RY DE S IGN OF A E RIA L FA CILITI E S LTD.
RE P RODUCTION OR US E OF THI S DE S I GN B Y OTHE RS I S
P E RMIS S IB LE ONLY I F E X P RE S S LY A UTHORIS E D I N WRITI NG
B Y A E RI A L FA CI LI TI E S LTD.
R25
3K 6
TR3
FZT751
R19
2R2
R68
TR6
FZT751
R36
2R2
1K
R76
10
H/book Number:-50-025301HBKM
D3
C5
10p
C20
10p
LE D1
C6
7. 5p
C21
7. 5p
1K
R41
1K
R42
RL1
B CW71
TR8
C7
2. 2p
C22
2. 2p
470p
C8
470p
C23
150R
R63
R46
0R0
C34
1U
R40
50R
R49
RF OUTP UT
560R
ZD4
3V 3
TR7
FZT751
10K
R73
2K 2
R43
Tel : 01494 777000
Fax : 01494 777002
England
Aerial Facilities Limited
CP L2
HY 45B
2K 4
R50
TR9
B CW71
1K
3K
TR10
B CW71
R60
R61
4K 7
R74
common
RL1/1
B CW71
TR11
CON 1
CON 1 oc good/0v bad
CON 1 TTL al arm
CON 1 bad
CON 1 good
11
CUS TOME R
10
DRA WI NG No
CIRCUIT DIAGRAM
11
12-016370
POWER AMPLIFIER,380-470MHz,20W,CLASS A,
TITLE
22K
R62
10
12
12
5.5.1.3
Drg. Nō. 12-016370, 20W PA Circuit Diagram
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 50Ω 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 50Ω 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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-55 of 69
5.5.2.2
Technical Specification
PARAMETER
Frequency Range:
Attenuation Range:
Attenuation Steps:
VSWR:
RF Connectors:
Power Handling:
attenuator:
detector/amp:
Temperature Range: operation:
storage:
attenuator pcb
Size:
detector/amp pcb
attenuator:
Weight:
detector/amp:
SPECIFICATION
up to 1000MHz
3 to 30dB
continuously variable
better than 1.2:1
SMA female
1W
>30W (or as required)
-10°C to +55°C
-40°C to +70°C
50 x 42 x 21mm
54 x 42 x 21mm
90g
100g
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-56 of 69
5.5.2.3
Drg. Nō. 17-001101, ACG Detector Assembly
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-57 of 69
5.5.2.4
Drg. Nō. 17-001171, AGC Detector Circuit Diagram
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-58 of 69
5.5.2.5
Drg. Nō. 17-001171C, AGC Detector Parts List
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-59 of 69
5.5.2.6
Drg. Nō. 17-001201, AGC Attenuator Assembly Drawing
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-60 of 69
5.5.2.7
Drg. Nō. 17-001270, AGC Attenuator Circuit Diagram
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-61 of 69
5.5.2.8
Drg. Nō. 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
Issue No:-1
Date:-04/07/2003
Page:-62 of 69
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-63 of 69
7.
MAINTENANCE
7.1
7.1.1
General Procedures
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-64 of 69
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-65 of 69
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:
Signal Generator:
Attenuator:
Test Antenna:
Digital multi-meter:
Test cable x 2:
Test cable x 2:
Hand tools:
100kHz to 2GHz (Dynamic range = 90dB).
30MHz to 2GHz (-120dBm to 0dBm o/p level).
20dB, 10W, DC-2GHz, (N male – N female).
Yagi or dipole for operating frequency.
Universal Volt-Ohm-Amp meter.
N male – N male, 2M long RG214.
SMA male – N male, 1m long RG223.
Philips #1&2 tip screwdriver.
3mm flat bladed screwdriver.
SMA spanner and torque setter.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-66 of 69
7.3
7.3.1
Care of Modules
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:
Remove power to the unit
Remove all visible connectors (RF, DC & alarm)
Release module retaining screws.
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):
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.
Reconnect all connectors, RF, alarm, power etc.,(concealed connectors may have to be
connected first).
Replace retaining screws (if any).
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.
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-67 of 69
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
Disconnect the mains power supply and disconnect the 24V dc supply connector for the
LPA.
Disconnect the RF input and output cables from the LPA.
Disconnect the alarm connector.
Remove the alarm monitoring wires from (D type connector) pins 9 and 10.
Remove the LPA module by removing the four retaining screws, replace with a new
LPA module and secure it with the screws.
Connect the RF cables to the LPA input and output connectors. Reconnect the wires to
the alarm board connector pins 9 and 10.
Reconnect the DC supply connector and turn the mains switch on.
Note:
Tighten SMA connectors using only a dedicated SMA torque spanner. If
SMA connectors are over-tightened, irreparable damage will occur. . Do not use
adjustable pliers to loosen/tighten SMA connectors.
Also take care not to drop or knock the module as this can damage (or misalign in the
case of tuned passive modules) sensitive internal components. Always store the modules
in an environmentally friendly location
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
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-68 of 69
APPENDIX A
INITIAL EQUIPMENT SET-UP CALCULATIONS
GENERAL INFORMATION
Client Name:
AFL Equip. Model Nō.
Site Name:
Date:
Model
ANTENNA SYSTEMS
Gain
Azimuth
Comments
Type
Loss
Comments
A - Service Antenna
B – Donor Antenna
Length
C – Service Feeder
D – Donor Feeder
INITIAL PARAMETERS
E – CE Output Power
F – Antenna Isolation
G – Input signal level from donor BTS
Operating Voltage
DOWNLINK CALCULATIONS
Parameter
Comments
Input signal level (G)
CE max. o/p power (E)
Gain setting
E-G
Isolation required
(Gain + 10dB)
Service antenna gain (A)
Service antenna feeder loss (C)
Effective radiated power (ERP)
E+A-C
Attenuator setting
CE gain-gain setting
dBm
dB
dBm
Value
dBm
dBm
dB
dB
dB
dB
dBm
dB
If the input signal level in the uplink path is known and steady, use the following calculation
table to determine the gain setting. If the CE features Automatic Gain Control the attenuator
should be set to zero and if not, then the attenuation setting for both uplink and downlink
should be similar.
UPLINK CALCULATIONS
Parameter
Comments
Input signal level
CE max. o/p power (E)
Gain setting
Required isolation
Donor antenna gain (B)
Donor antenna feeder loss (D)
Effective radiated power (ERP)
E+B-D
Attenuator setting
(CE gain-gain setting)
Value
dBm
dBm
dB
dB
dB
dB
dBm
dB
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-1
Date:-04/07/2003
Page:-69 of 69

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