Glossary of Terms................................................................................................ ............................................ 7
AFL Drawing Symbol Keys................................................................................................ ............................. 8
3.1 Parts Lists................................................................ .......................................................................... 12
3.1.1 Location 2 Equipment Parts List...................................................................................................... 12
3.1.2 Unit 1 Fibre Fed Tunnel Amplifier 60-056101 Parts List................................................................ . 12
3.1.3 Unit 2 Fibre Fed Tunnel Amplifier 60-056102 Parts List................................................................ . 14
3.1.4 800MHz Bi-directional Air Interface Amplifier Parts List................................................................ 16
7.1.5 Checking service ............................................................................................................................. 92
7.1.6 Service Support ............................................................................................................................... 92
7.2 Tools & Test Equipment.................................................................................................................... 92
7.3 Care of Modules ................................................................................................................................ 93
7.3.1 General Comments.......................................................................................................................... 93
7.3.2 Module Removal (LNA’s, general procedure):................................................................................. 93
APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS ..........................................95
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-4 of 4
AMENDMENT LIST RECORD SHEET
Issue
No.
Date Incorporated
by
Page No.’s
Amended
1 CMH
Reason for new issue
Document Ref:-
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-5 of 5
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.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-6 of 6
Glossary of Terms
Repeater or
Cell Enhancer A Radio Frequency (RF) amplifier which can simultaneously
amplify and re-broadcast Mobile Station (MS) and Base Transceiver
Station (BTS) signals.
Band SelectiveRepeater A Cell Enhancer designed for operation on a range of channels
within a specified frequency band.
Channel Selective
Repeater A Cell Enhancer, designed for operation on specified channel(s)
within a specified frequency band. Channel frequencies may be
factory set or on-site programmable.
BTS Base Transceiver Station
C/NR Carrier-to-Noise Ratio
Downlink (D.L.) RF signals transmitted from the BTS and to the MS
Uplink (U.L.) RF signals transmitted from the MS to the BTS
EMC Electromagnetic Compatibility
GND Ground
DC Direct Current
AC Alternating Current
ID Identification Number
OIP3 Output Third Order Intercept Point = RF
+(C/I)/2
out
LED Light Emitting Diode
M.S. Mobile Station
N/A Not Applicable
N/C No Connection
NF Noise Figure
RF Radio Frequency
Rx Receiver
Tx Transmitter
S/N Serial Number
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-7 of 7
AFL Drawing Symbol Keys
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-8 of 8
1. SAFETY CONSIDERATIONS
1.1 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.
1.2 RF Radiation Hazard
“CAUTION: This equipment is approved for antennas mounted on fixed outdoor permanent
structures. A minimum separation distance of 2 metres must be maintained between the
radiating elements and any nearby persons. A maximum antenna gain of 21 dBi may be used.
Operating this equipment without regard to these restrictions will result in RF exposure levels
above the limits allowed by FCC rules.”
This equipment complies with part 90 of the FCC rules. Any changes or modifications not
expressly approved by the manufacturer could void the user’s authority to operate the equipment.
RF radiation, (especially at UHF frequencies) arising from transmitter outputs connected to
AFL’s equipment, must be considered a safety hazard.
This condition might only occur in the event of cable disconnection, or because a ‘spare’
output has been left unterminated. Either of these conditions would impair the system’s
efficiency. No investigation should be carried out until all RF power sources have been
removed. This would always be a wise precaution, despite the severe mismatch between the
impedance of an N type connector at 50?, and that of free space at 377?, which would
severely mitigate against the efficient radiation of RF power. Radio frequency burns could also
be a hazard, if any RF power carrying components were to be carelessly touched!
Antenna positions should be chosen to comply with requirements (both local & statutory)
regarding exposure of personnel to RF radiation. When connected to an antenna, the unit is
capable of producing RF field strengths, which may exceed guideline safe values especially if
used with antennas having appreciable gain. In this regard the use of directional antennas with
backscreens and a strict site rule that personnel must remain behind the screen while the RF
power is on, is strongly recommended.
Where the equipment is used near power lines, or in association with temporary masts not
having lightning protection, the use of a safety earth connected to the case-earthing bolt is
strongly advised.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-9 of 9
1.3 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.
1.4 Emergency Contact Numbers
The AFL Quality Department can be contacted on:
Telephone +44 (0)1494 777000
Fax +44 (0)1494 777002
e-mail qa@aerial.co.uk
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-10 of 10
2. OVERVIEW/SYSTEM DESCRIPTION
The AFL Fibre feed Amplifiers for the Pasadena Blue line project are 2 way on-band RF
amplifiers. Their application is as an interface between the fibre optical link from the off air
amplifiers and the tunnel antenna/leaky feeder system. There are two units one designated
‘UNIT 1’ for the frequencies in the 470-473MHz range , the other ‘UNIT 2’ for the
frequencies in the 483-486MHz range.
Each unit is housed in an environmentally protected IP65 steel wall-mount case. Handles are
provided for carrying the unit and the door is fitted with locks. The unit interfaces with ‘N’
type female connectors for RF connections and heavy duty connectors for routing of AC
power supply input and alarm output wiring. Cable glands are provided for routing of the
Fibre optic cable in to the unit.
To provide adequate selectivity in the Downlink and Uplink paths, combline design duplexers
are used at the input and output ports. To provide the required gain to reach the required
signal levels, low-noise amplifiers (LNA’s) are used in each path, these being followed by
power amplifier modules in the uplink to provide the required intermodulation performance.
Gain adjustment is available locally using switched attenuators.
Note that “Downlink” refers to the RF path from FO receiver to the leaky feeder port and that
“Uplink” refers to the RF path from the leaky feeder port to the FO transmitter.
The AFL 800MHz Off Air Amplifier for the Pasadena Blue line project is a 2 way on-band RF
amplifier. It’s application is as an air interface between the donor radio site and the tunnel
leaky feeder system. Each unit is housed in an environmentally protected IP65 steel wallmount case. Handles are provided for carrying the unit and the door is fitted with locks. The
unit interfaces with ‘N’ type female connectors for RF connections and heavy duty connectors
for routing of AC power supply input and alarm output wiring.
Noise Figure: Downlink <5 dB at maximum gain
Noise Figure: Uplink <12dB at maximum gain
Better than –13dBm downlink
In-Band Spurious:
Better than –13dBm uplink
(measure with 30KHz BW with max gain setting)
Out-band Spurious up to 3GHz: Better than –90dBc
Uplink Channels:
486.0625MHz
486.2875MHz
486.3125MHz
486.5625MHz
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
H/book Number:-60-056100HBKM
Issue No:-1
Date:-13/02/2003
Page:-20 of 20
3.2.4 UHF TWO to Location TWO Technical Specification
Frequency Range: Downlink Channels:
483.0625MHz
483.2875MHz
483.3125MHz
483.5625MHz
Uplink Channels:
486.0625MHz
486.2875MHz
486.3125MHz
486.5625MHz
Band Width: Downlink :15kHz
Uplink : 25kHz ,486.0625MHz, 486.5625MHz
15kHz ,486.2875MHz, 486.3125MHz
No. of Paths: 2
RF Connector: N type female
RF Impedance:
50Ω
VSWR: Better than 1.5:1
Downlink Gain: 90 dB min
Uplink Gain: 78 dB min
Gain Adjustment: 0 to 30 in 2dB steps
Downlink PA: 20W Class A Linear
Uplink PA: 20W Class A Linear
Duplexer UP/DN Isolation: >80 dB
Passband Ripple: <±1.5 dB
Noise Figure: Downlink <5 dB at maximum gain
Noise Figure: Uplink <12 dB at maximum gain
In-Band Spurious: Better than –13dBm downlink
Better than –13dBm uplink
(measure with 30KHz BW & max gain setting)
Out-band Spurious up to 3GHz: Better than –90dBc
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-21 of 21
3.2.5 800MHz Bi-directional Amplifier to Location TWO Technical Specification
Frequency Range: Downlink Channels:
857.9375MHz
859.7625MHz
Band Width: Downlink :15kHz
Uplink : 25kHz
No. of Paths: 2
No. of RF Ports: 2
No. of Fibre Connections: N/A
RF Connector: N type female
RF Impedance:
50Ω
VSWR: Better than 1.5:1
Downlink Gain: 78 dB min
Uplink Gain: 80 dB min
Gain Adjustment: 0 to 30 in 2dB steps
Downlink PA: 5W Class A Linear
Downlink Power: 2 Carriers at +18dBm
Uplink PA: 5W Class A Linear
Uplink Power: 2 Carriers at +18dBm
Duplexer UP/DN Isolation: >80 dB
Passband Ripple: <±1.5 dB
Noise Figure: Uplink <6 dB at maximum gain
Downlink <5 dB at maximum gain
In-Band Spurious: Better than –13dBm downlink
Better than –13dBm uplink
(measure with 30KHz BW with max gain setting)
MTBF: >50,000 hours
Supply Input Voltage: 110V AC
Alarms Fitted: Alarm: Volts free contacts
Alarm indicator- Red LED
Power Indicator-Green LED
Uplink Channels:
812.9375MHz
814.7625MHz
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-22 of 22
3.3 Mechanical Specification
3.3.1 Unit 1, Unit 2, + 800MHz BDA
Size:
(excluding connectors, heatsinks, handles and feet)
Fixings:
Weight:
Temperature Range:
Humidity:
Environmental Protection:
Finish:
Case:
Heatsinks:
Handles:
Supply Cable: Unit supplied with 3-pin IP68 connector for
height:
width:
depth:
operational:
storage:
620 mm
420 mm
250 mm
4 holes on 500 mm (h) x 467 mm (w)
kg (approx.)
50
-20°C to +50°C
-40°C to +70°C
10% to 95% non-condensing
IP65 (with door closed and all ports terminated)
RAL 7032
Black anodised
Black (where fitted)
customer interface with AC input.
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
H/book Number:-60-056100HBKM
Issue No:-1
Date:-13/02/2003
Page:-23 of 23
4. SYSTEM DRAWINGS
4.1 Drg. No. 60-056190, Location 2 Unit 1 Case Outline Drawing
A
B
C
D
E
DBSDECIMAL EQUIV'S
DBSECN27472A
21/10/02
30/10/02
BYDATEDESCRIPTIONNo
DBS
15/10/02
F
3
A
89
7
6
5
4
460 [1'-6.1"]
420 [1'-4.5"]
470/473MHz INPUT/OUTPUT
Product ref :
Aerial Facilities
Limited
CE- / - N
BPA 470/473MHz
Heavy
CAUTION
500 [1'-7.7"]
485/486MHz INPUT
ISSUE
60-056190
PRODUCTION ISSUE
1A
1B
PASADENA BLUE LINE. LOCATION 2.
483MHz OUTPUT
LOCKABLE
DOOR
CATCH
ALARMS
High
voltage
DANGER
467 [1'-6.4"]
PSU ALARM
M6 EARTH STUD
BDA 470/473MHz. OUTLINE DRAWING
TITLE
CUSTOMER DRAWING.No
England
Fax : 01494 777000
Aerial Facilities Limited
Fax : 01494 777002
3
250 [9.9"]
12
A
B
H/book Number:-60-056100HBKM
709 [2'-3.9"]
620 [2'-0.4"]
115V AC INPUT
CABLE GLANDS (FIBRE OPTICS)
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.
TOLERANCESSCALE
15/10/02
APPD
DATE
MATERIAL: MILD STEEL
FINISH: PAINTED TO RAL 9017
WALL FIXINGS: M8 (5/16")
RF CONNECTORS: N TYPE FEMALE
ENVIRONMENTAL CLASS.: IP65
SEMI-GLOSS TRAFFIC BLACK
DBS
CHKD
C
D
E
DRAWN
F
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-24 of 24
1:8
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
123456789
ALL DIMENSIONS ARE IN mm
PBGD
UNLESS OTHERWISE STATED
4.2 Drg. No. 60-056192, Location 2 Unit 2 Case Outline Drawing
A
B
89
7
C
D
MATERIAL: MILD STEEL
FINISH: PAINTED TO RAL 9017
WALL FIXINGS: M8 (5/16")
RF CONNECTORS: N TYPE FEMALE
ENVIRONMENTAL CLASS.: IP65
SEMI-GLOSS TRAFFIC BLACK
E
DBS
DBSDECIMAL EQUIV'S
DBSECN27472A
15/10/02
21/10/02
30/10/02
PRODUCTION ISSUE
1A
1B
F
3
BYDATEDESCRIPTIONNo
ISSUE
A
60-056191
PASADENA BLUE LINE. LOCATION 2.
BDA 483/485MHz. OUTLINE DRAWING
6
5
4
3
497 [1'-7.6"]
420 [1'-4.5"]
Product ref :
CE- / - N
BPA 483/485MHz
Heavy
CAUTION
470/473MHz
485/486MHz OUTPUT
INPUT
Aerial Facilities
TITLE
500 [1'-7.7"]
Limited
PSUALARM
High
voltage
DANGER
LOCKABLE
DOOR
CATCH
467 [1'-6.4"]
ALARMS
M6 EARTH STUD
CUSTOMER DRAWING.No
England
Fax : 01494 777000
Aerial Facilities Limited
Fax : 01494 777002
1:8
709 [2'-3.9"]
LCX
800MHz
115V AC INPUT
250 [9.9"]
12
483MHz INPUT
A
B
H/book Number:-60-056100HBKM
620 [2'-0.4"]
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.
TOLERANCESSCALE
VHF
C
D
E
15/10/02
DATE
DRAWN
APPD
DBS
CHKD
F
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-25 of 25
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
123456789
ALL DIMENSIONS ARE IN mm
PBGD
UNLESS OTHERWISE STATED
4.3 Drg. No. 60-056192, 800MHz BDA Case Outline Drawing
A
B
C
D
E
BYDATEDESCRIPTIONNo
DBS
DBS2A
15/10/02
30/10/02
F
3
A
89
7
6
5
4
3
420 [1'-4.5"]
500 [1'-7.7"]
CONNECTION TO BDA
Product ref :
Aerial Facilities
Limited
BPA 800MHz
CE- / - N
Heavy
CAUTION
500 [1'-7.7"]
709 [2'-3.9"]
TO ANTENNA
ISSUE
60-056192
PRODUCTION ISSUE
ECN2747
1A
PASADENA BLUE LINE. LOCATION 2.
BDA 800MHz. OUTLINE DRAWING
TITLE
LOCKABLE
DOOR
CATCH
High
voltage
DANGER
467 [1'-6.4"]
PSU ALARM
M6 EARTH STUD
ALARMS
115V AC INPUT
CUSTOMER DRAWING.No
England
Fax : 01494 777000
Aerial Facilities Limited
Fax : 01494 777002
1:8
250 [9.9"]
12
A
B
H/book Number:-60-056100HBKM
620 [2'-0.4"]
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.
TOLERANCESSCALE
15/10/02
APPD
DATE
MATERIAL: MILD STEEL
FINISH: PAINTED TO RAL 9017
WALL FIXINGS: M8 (5/16")
RF CONNECTORS: N TYPE FEMALE
ENVIRONMENTAL CLASS.: IP65
SEMI-GLOSS TRAFFIC BLACK
DBS
CHKD
C
D
E
DRAWN
F
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-26 of 26
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
123456789
ALL DIMENSIONS ARE IN mm
PBGD
UNLESS OTHERWISE STATED
4.3 Complete Pasadena Metro System Diagram
TUNNEL ONE & TWO
J4
J3
U
VHF
LCX
LCX
-50dBm
02-007302
HI
L
H
02-007302
12-00420111-007302
02-013401
28dBm
dB
20dB 30dB
20dBm
483MHz
18dBm
-50dBm
483-486MHz
-50dBm
-57dBm
02-013401
11-00730211-006102 11-007302
dB
AGC
16dB 20dB20dB
AGC
DET
485-486MHz
60-056002
470MHz
02-013401
28dBm
12-00420511-007302
dB
20dB 30dB
UNIT 1
470MHz
02-007302
T7
O
E
-15dBm
02-007302
-15dBm
5
02-013401
11-00740211-006102 11-007302
dB
AGC
16dB 20dB24dB
AGC
DET
483MHz
02-007302
T8
-15dBm
473MHz
473MHz
O
E
02-007302
-15dBm
6
25dBm
-65dBm
485-486MHz
470MHz
02-013401
30dBm
12-00180111-007302
dB
20dB 30dB
UNIT 1
470MHz
02-007302
T5
O
E
-15dBm
02-007302
-15dBm
3
3
02-013401
11-007302
dB
AGC
16dB 20dB20dB
11-006102 11-007302
AGC
DET
483MHz
02-007302
T6
-15dBm
473MHz
473MHz
O
E
02-007302
-15dBm
4
20dBm
18dBm
27dBm
-57dBm
J
470-475MHz
FG
E
-17dBm
485-486MHz
UNIT 2
60-056001
-50dBm
18dBm
20dBm
P
470-475MHz
02-007302
LM
O
K
N
-17dBm
UNIT 2
60-056101
J5
LCX
LCX
18dBm
L
H
L
H
02-007302
12-00420111-007302
-60dBm
-60dBm
02-013401
26dBm
dB
20dB 30dB
-62dBm
483-486MHz
483MHz
R
02-010401
02-010401
VHF
S
800MHz
-65dBm
485-486MHz
02-013401
11-00730111-006102 11-007302
dB
AGC
16dB 20dB20dB
AGC
DET
60-056102
T
19dBm
-63dBm
21dBm
30dB
12-000201
dB
20dB
11-00590211-006702
-25dBm
14dB
857.9375MHz
859.7625MHz
dB
800MHz
-60dBm
30dB
857-860MHz
T10
14dB
857-860MHz
812.9375MHz
-26dBm
J6
-65dBm
14dB
12-00020111-00670211-005902
18dBm
dB
814.7625MHz
20dB
dB
30dB30dB
812-815MHz
14dB
T11
812-815MHz
60-056103
LOCATION TWO
-3dBm
11-007302
15dB
-23dBm
482.2375MHz
dB
32dB20dB
11-00740111-007302
02-013401
UHF 1
dB
470.2625MHz
11-007401
482MHz
-72dBm
20dB
11-007302
20dB
-23dBm
470.2125MHz
dB
32dB
02-013401
20dB
20dB
470MHz
473.2625MHz
-23dBm
-22dBm
T3
12-001801 11-007301
-62dBm
+20dBm
J1
473.2125MHz
5dB
dB
20dB
30dB
02-013401
dB
5dB
-22dBm
11-006101 11-007301
473MHz
485.2375MHz
15dB
-12dBm
dB
20dB
16dB
02-013401
486.3125MHz
6dB
+18dBm
-20dBm
486.2875MHz
T4
EOE
-15dBm
T2
-19dBm
6dB
-20dBm
12-004201 11-007301
02-013401
-15dBm
486.0625MHz
dB
20dB30dB
486MHz
2
O
486.5625MHz
6dB
6dB
-20dBm
-20dBm
LOCATION ONE
60-055902
-19dBm
B
CD
A
-11dBm
-3dBm
32dB
-27dBm
11-007401
20dB
T9
483.3125MHz
485MHz
UHF 2
60-055901
-35dBm
11-007401
483.2875MHz
-15dBm
32dB
20dB
-35dBm
11-007401
02-013401
-82dBm
O
E
dB
11-007401
483.0625MHz
dB
32dB
483MHz
1
-15dBm
T1
32dB
20dB
25dB
-35dBm
11-007401
483.5625MHz
J2
32dB
20dB
-72dBm
-35dBm
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
H/book Number:-60-056100HBKM
Issue No:-1
Date:-13/02/2003
Page:-27 of 27
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-28 of 28
5. SUB-UNIT MODULES
5.1 Location 2, Unit 1 (60-056101)
5.1.1 Bandpass Filters (02-007302, 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 silverplated to reduce surface ohmic losses and maintain a good VSWR figure and 50? load at
the input and output ports.
No adjustments should be attempted without full network sweep analysis facilities to
monitor both insertion loss and VSWR simultaneously.
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.
5.1.2.2 Switched Attenuators
The AFL switched attenuators are available in two different types; 0 – 30dB in 2 dB steps
(as in this case), or 0 – 15dB in 1 dB steps. The attenuation is simply set using the four
miniature toggle switches on the top of each unit. Each switch is clearly marked with the
attenuation it provides, and the total attenuation in line is the sum of the values switched
in. They are designed to maintain an accurate 50? impedance over their operating
frequency at both input and output.
The low noise amplifiers used are double or triple 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. Note that all three amplifiers use similar DC power
circuit boards.
5.1.3.2 Technical Specification (11-006102)
Frequency range: 70 – 500MHz
Bandwidth: <430MHz
Gain: 15.5dB (typical)
1dB Compression Point: +31dBm (typical)
3rd order intercept: +46dBm (typical)
Input return loss: >20dB
Output return loss: >20dB
VSWR: Better than 1.5:1
Noise figure: <4.8dB
Connectors: SMA female
Supply: 530mA @ 10 to 24V DC (typical)
Temperature range:
operational: -10°C to +60°C
storage: -40°C to +70°C
Weight: 260gms
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-30 of 30
5.1.3.3 Drg. No. 11-006102, Low Noise Amplifier General Assembly
123456789
A
10
225
5
27
5
1623
1
see note 3
34
L6
T2
L9
L10
C11
11-006125 Issue.1
C12
R13
C14
R14
L12R12
L11
C15
L14
C17
B
C
D
IN 2 PLACES
DC PCB
6
327
4
25
3
2
424
RF PCB
IN 2 PLACES
2
2
20
1533
R45
REG3
R49
R50R51
J5
J4
R40
A B C
CON1
RL1
R44R43
C9
R9
R10
R15
C16
L13
R17
R16
8263027
2
2
1724
E
22
521
BYDATEDESCRIPTIONNo
MNR
22/03/02
ISSUE
PRODUCTION ISSUE
1A
380-500MHz 1W AMPLIFIER
TITLE
2
2
Aerial Facilities Ltd
F
A
3
11-006102
WITH RELAY ASSEMBLY
CUSTOMER DRG.No
England
Tel : 01494 777000
Fax : 01494 777002
IN 4 PLACES
see note 2
31
AFL
see note 2
35
LABEL DETAILS - SCALE 1:1
DEVICES
SENSITIVE
ELECTROSTATIC
FOR HANDLING
OBSERVE PRECAUTIONS
ATTENTION
see note 2
AFL
34
OUT
0086
1W 12-24vDC
380-500MHz
S/N********INDATE**/**/20**
POWER
FREQ.
AFL
REF.11-006102
2819
BY AERIAL FACILITIES LTD.
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
DATE
ONE DECIMAL PLACE ± 0.3mm
NO DECIMAL PLACE ± 1mm
TOLERANCESSCALE
APPD
TWO DECIMAL PLACES ± 0.1mm
123456789
1.5:1
ALL DIMENSIONS ARE IN mm
COMPONENTS TO BE ADDED TO 11-003912,ITEM 15,DC PCB SUB-ASSEMBLY
A
B
C
1. SOLDER JOINTS TO BE MADE USING OR
D
E
DRAWN
MNR22/03/02
2. LIDS,ITEMS 2 & 3 AND LABELS,ITEMS 31,34 & 35,TO BE FITTED ON TEST
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.
TOLERANCESSCALE
5/7/02
APPD
DATE
CBIB
DBS
CHKD
E
DRAWN
F
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-41 of 41
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
123456789
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
5.1.3.14 Drg. No. 11-007471 LNA DC Wiring Diagram
10-24V DC I/P
1
B
GROUND
3
2
A
CON1
9 WAY 'D'
PIN OUTS
89
A
2 CON1
C
RELAY COMMON
RELAY CONTACT BAD
5
4
4 CON1
3 CON1
RELAY CONTACT GOOD
5 CON1
687
TTL VOLTAGE SET
7 CON1
TTL ALARM/0v GOOD
9
8 CON1
OC GOOD/0v BAD9 CON1
D
E
BYDATEDESCRIPTIONNo
DBS
F
3
A
8/7/02
OUT
RF
ISSUE
11-007471
PRODUCTION ISSUE
7
1A
C
+8V
O
G
REG3
LM7808CT
6
I
DC PCB
SEE 11-003971
BA
J31 1
J32 2
FOR CIRCUIT DIAGRAM
J22 2
J21 1
J11 1
J12 2
5
J11 - J12
J21 - J22
J31 - J32
LOW NOISE AMPLIFIER. 380-500MHz
(30dB) SCHEMATIC DIAGRAM
TITLE
CUSTOMER DRAWING.No
England
Tel : 01494 777000
Aerial Facilities Limited
Fax : 01494 777002
4
-
8V
5V
5V 75mA
3
-ve
DC INPUTDC OUTPUT
-ve
5V 75mA
SEE 11-007470
FOR CIRCUIT DIAGRAM
12
A
B
H/book Number:-60-056100HBKM
RF PCB
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.
TOLERANCESSCALE
8/7/02
APPD
DATE
CBIB
IN
RF
C
D
E
DRAWN
DBS
CHKD
F
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-42 of 42
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
123456789
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
5.1.4 3 Stage Amplifier Alarm Boards (12-002201)
5.1.4.1 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 threestage version (12-002201) is used on complex amplifiers where three separate comparators
have their outputs logically combined to a common output stage. Failure of any one stage will
activate the alarms.
Note that the alarm board has a green Light Emitting Diode located near to the centre of the
printed circuit board, which is illuminated on ‘Good’, and extinguished on ‘Alarm’. It is
therefore a simple matter to identify an active module failure, by searching for an Alarm
Board which has its green LED extinguished. A simple test of the alarm board is possible by
shorting across the monitor inputs, pins 1 and 2, 3 and 4 or across pins 5 and 6. This last
monitor input is inactive if the board has been converted to a two way alarm board. (Refer to
relevant amplifier alarm wiring diagram.)
1) Volt-free change over relay contacts.
2) Open collector NPN transistor pulls low on alarm.
3) TTL driver.
The use of precision voltage sources and resistors has eliminated the need for initial
adjustment or calibration, and the board will function correctly with a wide variation in power
supply voltage (8 to 30 volts, nominal supply is 12 or 24Volts).
There are two selectable link options on the three-way board:
LINK1 - Removed to convert to two-way alarm board.
LINK2 - Removed to isolate 0V from chassis earth.
The one way alarm board only has the 0V isolation link (LINK2) fitted.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-43 of 43
5.1.4.2 Technical Specification
Operating voltage: 8 to 30V (floating earth)
Alarm Threshold: Vcc - 1.20 volt +15%
The power amplifier fitted in this unit is a multi-stage, solid state power amplifier. Class A
circuitry is employed throughout the device to ensure excellent linearity over a wide
dynamic frequency range. All the semi-conductor devices are very conservatively rated to
ensure low device junction temperatures and a long, trouble free working lifetime.
The power amplifier should require no maintenance over its operating life. Under no
circumstances should the cover be removed or the side adjustments disturbed unless it is
certain that the amplifier has failed; since it is critically aligned during manufacture and any
re-alignment will require extensive test equipment.
5.1.5.2 Technical Specification
Frequency range: 350 – 550MHz (tuned to spec.)
Bandwidth: 20MHz (tuned to spec.)
Maximum output power: >10W
Gain: 30dB
1dB compression point: <+43dBm
3rd Order intercept point: <+54dBm
VSWR: better than 1.45:1
Connectors: SMA female
Supply: 2.5A @ 24V DC
operational: -10°C to +55°C Temperature
range:
Size:
Weight:
storage: -40°C to +70°C
276 x 78 x 40mm (ex. connectors &
heatsink)
1.5 kg(approximately, excluding
heatsink)
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-48 of 48
5.1.5.3 Drg. No. 12-004205, 10Watt PA General Assembly
A
B
1916
C
D
E
BYDATEDESCRIPTIONNo
F
3
A
89
17
23
17
114
7
6
PLAN VIEW WITH LID REMOVED
231422
5
IN 3 POSNS
4
29302827
16
17
8/5/00
4
ISSUE
12-004205
D1
+24V
REG 2
C30
C19
+
C18
+
R4
+
R5
C14
R3
REF.
DET.2
C27
2
23
C23
L5
C21
C20
TR2
L4
C28
C22
C16
C17
C29
C13C15
C12
C11
TAB IN DIRECTION
FIT WITH CHAMFERED
C25C26
C24
SHOWN - - >
914
21
2
CR1679+CR1719/20MNR
1A
IN 9 POSNS
POWER AMPLIFIER, 450MHz 10W
CLASS A, GENERAL ASSEMBLY
TITLE
89
CUSTOMER DRAWING.No
67
315
THIRD ANGLE PROJECTION
2
2
C9
+
REG 1
C3
C7
R1
TR1
DET.1
R2
C8
L3
C10
C5C4C6
14
SHOWN - - >
TAB IN DIRECTION
FIT WITH CHAMFERED
1023
5
IN 9 POSNS
AFL
England
Fax : (01494)777002
Tel : (01494)777000
Aerial Facilities Limited
45
L2
L1
12-004225
Aerial Facilities
Limited
SEE NOTE 1
3
2
2
11
3132
723
PLAN VIEW
+24v
NOT SHOWN ON
12
ITEM 31,32
A
B
H/book Number:-60-056100HBKM
C1
IN 2 POSNS
13
6
22SWG WIRE
20
C2
26
4
GRN
DET1
YEL
VIO
DET2 REF
BLU
6 7 8 9
1 2 3 4 5
REF
VIEW ON ARROW A
C
D
2: COMPLETE ALL SOLDERING USING ITEM
1: CUT WIRE TO APPROX LENGTHS - BARE & TIN 3mm BOTH ENDS
3: IDENT LABEL TO BE SUPPLIED AND COMPLETED AT TEST
FIT CENTRALLY ON LID.
E
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-49 of 49
1:1
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.
TOLERANCES
8/5/00
APPD
DATE
3
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
BB
12
ALL DIMENSIONS ARE IN mm
DRAWN
DBS
CHKD
GB
F
UNLESS OTHERWISE STATED
5.1.5.4 Drg. No. 12-004271, 10W PA Circuit Diagram
A
B
C
D
E
BYDATEDESCRIPTIONNo
DBS
F
3
A
RF OUTPUT
C27
ALARM
DET.2
56pF
1-14pF
C25C26
89
R4
1KR
7
+24v
*
C31
1nF
6
D1
5
4
R3
470R
2OCTQ45
+
ADJ
ALARM
REF
C18
C19
56pF1uF
ALARM
R5
R68
REG.2
DET.1
C30
1000pF
C21
+
C20
1uF56pF
OUT
IN
+
C14
4.7uF
R2
1KR
C23
15pF
FB4FB3FB2FB1
*
TR2
PTB20031
*
C16
27pF
C28
18pF
C12
56pF
C24
15pF
C22
1-14pF
*
C17
27pF
C29
18pF
C15
1-14pF1-14pF
C13
1-14pF
C11
1-14pF
17/5/00
ISSUE
PRODUCTION ISSUE
1A
POWER AMPLIFIER 450MHz 10W CLASS A
TITLE
Aerial Facilities Limited
*
12-004271
CIRCUIT DIAGRAM
CUSTOMER DRAWING.No
England
Fax (01494)777002
Tel: (01494) 777000
-
3
R1
1R2
+
ADJ
C3
1uF
REG.1
LM337TLM337T
12
A
B
H/book Number:-60-056100HBKM
TR1
*
TP5012
C6
*
C7
1nF
C5
*
*
47pF
OUT
IN
L1L3L4L5
C8
220pF
L2
1uH
47pF
C4
1-14pF
C2
1-14pF
C1
56pF
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCESSCALE
17/5/00
APPD
DATE
123456789
+
C9
1uF
C
RF INPUT
D
CONDUCTORS SHOWN THUS: ARE 50 ohm STRIPLINES
REFER TO 12-004211 FOR COMPONENT POSITIONS EXCEPT FOR THOSE MARKED
(THEY ARE SPECIFIED ON 12-004205)
DBS
DRAWN
E
GBBB
CHKD
F
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-50 of 50
5.1.5.5 Drg. No. 12-004271C1, 10W PA Parts List(1)
54321
12345
CIRC.
REF.
C1
A
B
C
D
E
93-20000656pF CHIP CAP 10% TOL.(MIN)
C2
93-130023PCB MOUNT AIR TRIMMER 1-14pF
C3
93-2400031uF TANTALUM CHIP CAP 35V
C4
93-130023PCB MOUNT AIR TRIMMER 1-14pF
C5
REFER TO GA 12-004205 FOR DETAILS
C6
REFER TO GA 12-004205 FOR DETAILS
C7
93-2000201nF CHIP CAP 63V 10%
C8
93-200014220pF CHIP CAP 10% TOL (MIN)
C9
93-2400041uF TANTALUM CHIP CAP 35V
C10
C11
93-130023PCB MOUNT AIR TRIMMER 1-14pF
C12
C13
93-130023PCB MOUNT AIR TRIMMER 1-14pF
C14
C15
93-130023PCB MOUNT AIR TRIMMER 1-14pF
C16
REFER TO GA 12-004205 FOR DETAILS
C17
REFER TO GA 12-004205 FOR DETAILS
C18
93-2400031uF TANTALUM CHIP CAP 35V
C19
93-20000656pF CHIP CAP 10% TOL.(MIN)
C20
93-2400041uF TANTALUM CHIP CAP 35V
C21
93-20000656pF CHIP CAP 10% TOL.(MIN)
C22
93-130023PCB MOUNT AIR TRIMMER 1-14pF
C23
C24
93-20000515pF CHIP CAP 10% TOL.(MIN)
C25
93-130023PCB MOUNT AIR TRIMMER 1-14pF
C26
93-130023PCB MOUNT AIR TRIMMER 1-14pF
C27
93-20000656pF CHIP CAP 10% TOL.(MIN)
C28
93-20000418pF CHIP CAP 10% TOL.(MIN)
C29
C30
93-2000161000pF (1nF) CHIP CAP 10% TOL.(MIN)
C31REFER TO GA 12-004205 FOR DETAILS
NOT FITTEDNOT FITTED
56pF CHIP CAP 10% TOL.(MIN)93-200006
4.7uF TANTALUM CHIP CAP 35V93-240006
15pF CHIP CAP 10% TOL.(MIN)93-200005
18pF CHIP CAP 10% TOL.(MIN)93-200004
DESCRIPTIONAFL STOCK REF.
A
B
C
D
E
F
1A
18/5/00
ISSUE
G
Aerial Facilities Limited
DRAWNDATE
DBS
18/5/00
CR1679
CHANGE No
CHKD
GB
APPD
BB
TITLE
POWER AMPLIFIER,450MHz,10W
CIRCUIT COMPONENT LIST
CUSTOMER
COMPONENT LIST FOR
12-004271C1
CHANGE NoCHANGE NoCHANGE No
DATEDATEDATEDATEISSUEISSUEISSUE
F
G
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
H/book Number:-60-056100HBKM
Issue No:-1
Date:-13/02/2003
Page:-51 of 51
5.1.5.6 Drg. No. 12-004271C2, 10W PA Parts List(2)
5.1.6 DC/DC Converter, 24V in, 12V 8A out (13-003011)
5.1.6.1 Description
The DC/DC converter fitted is an AFL assembled, high power PCB unit with an 8 amp @
12V output capability. The circuit is basically an O.E.M semiconductor regulator (one side of
which has a heatsink mounting plate, that is usually bolted to the casing of a Cell Enhancer)
and smoothing components built onto a printed circuit board with screw block terminations.
Note: no circuit diagram of the O.E.M. regulator is available. This unit should not be
repaired, only replaced.
5.1.6.2 Technical Specification
Input Voltage Range: 18-28V DC
Output Voltage: 12V±0.5V
Max. Current Load: 8.0Amps
Operation: -10°C to +55°C Temperature
Range:
Storage: -40°C to +70°C
Size(PCB): 190 x 63mm
Weight (Loaded PCB): 291gms
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-54 of 54
5.1.7 Wide Dynamic Range AGC (17-001101, Det. & 17-001201, Atten.)
5.1.7.1 Description
The equipment is fitted with a wide dynamic range 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.
The AFL wide dynamic range Automatic Gain Control system consists of two units, a
detector/amplifier and an attenuator. The detector/amplifier unit is inserted in the RF path
on the output of the power amplifier, and the attenuator is situated in the RF path between
the 1st and 2nd stages of amplification.
Normally the attenuator is at minimum attenuation. The detector/amplifier unit monitors
the RF level being delivered by the power amplifier, and when a certain threshold is
reached it begins to increase the value of the attenuator to limit the RF output to the
(factory set) threshold. Therefore overloading of the power amplifier is avoided.
The factory set threshold is 1dB below the Enhancer 1dB compression point. Some
adjustment of this AGC threshold level is possible, a 10dB range is mostly achieved. It is
not recommended under any circumstances to adjust the AGC threshold to a level greater
than the 1dB compression point as system degradation will occur.
The detector comprises of a 50? transmission line with a resistive tap which samples a
small portion of the mainline power. The sampled signal is amplified and fed to a
conventional half wave diode rectifier, the output of which is a DC voltage proportional to
the RF input signal.
This DC voltage is passed via an inverting DC amplifier with integrating characteristics, to
the output, which drives the attenuation control line of the corresponding AGC attenuator.
This unit is fitted at some earlier point in the RF circuit.
The unit contains a 12V DC regulator in the detector module, which supplies stabilised
voltage to the DC amplifier and via an external cableform to the AGC attenuator.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-55 of 55
For small signals, below AGC onset, the output control line will be close to 12V and the
AGC attenuator will have minimum attenuation. As the signal level increases the control line
voltage will fall, increasing the attenuator value and keeping the system output level at a
constant value.
The AGC onset level is adjusted by the choice of sampler resistor R1 and by the setting of
potentiometer VR1.
The attenuator comprises a 50? P.I.N diode, voltage-variable attenuator with a range of 3 to
30dB. The attenuation is controlled by a DC voltage which is derived from the associated
AGC detector unit.
5.1.7.2 Technical Specification
Frequency Range: up to 1000MHz
Attenuation Range: 3 to 30dB
Attenuation Steps: continuously variable
VSWR: better than 1.2:1
RF Connectors: SMA female
attenuator: 1W Power Handling:
detector/amp: >30W (or as required)
operation: -10°C to +55°C Temperature Range:
storage: -40°C to +70°C
attenuator pcb 50 x 42 x 21mm Size:
detector/amp pcb 54 x 42 x 21mm
attenuator: 90g Weight:
detector/amp
100g
:
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-56 of 56
5.1.7.3 Drg. No. 17-001105, ACG Detector Assembly
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-57 of 57
5.1.7.4 Drg. No. 17-001172, Wide Range AGC Detector Circuit Diagram
The General Purpose Relay Board allows the inversion of signals and the isolation of
circuits. It is equipped with a single dual pole change-over relay RL1, with completely
isolated wiring, accessed via a 15 way in-line connector.
The relay is provided with polarity protection diodes and diodes for suppressing the
transients caused by "flywheel effect" which can destroy switching transistors or induce
spikes on neighbouring circuits. It’s common use is to amalgamate all the alarm signals
into one, volts-free relay contact pair for the main alarm system.
Note that the board is available for different voltages (12 or 24V) depending on the type
of relay fitted at RL1.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-61 of 61
5.1.8.2 Drg. No. 80-008970, Single Relay Board Circuit Diagram
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-62 of 62
5.1.9 24V 400W Flat-Pack Power Supply (96-300011)
5.1.9.1 Description
The power supply unit is a switched-mode type capable of supplying 24V DC at 16.0Amps
continuously. Equipment of this type typically requires approximately 10.0 Amps at 24V
DC, so the PSU will be used conservatively ensuring a long operational lifetime.
No routine maintenance of the PSU is required. If a fault is suspected, then the output
voltage from the power supply may be measured on its output terminals. This is typically
set to 24.5V.
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.
5.1.9.2 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: 16.0A
operational: -10BC to +55BC Temperature
range:
storage: -40BC to +70BC
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-63 of 63
5.1.10 JWS75-15/A PSU (96-300045)
5.1.10.1 Description
The power supply unit is a switched-mode type capable of supplying 24V DC at 6.25Amps
continuously. This PSU is used to provide power for the fibre optic modules which will
typically require approximately 3.0 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.
5.1.10.2 Technical Specification
AC Input Supply:
Voltage: 110 or 220V nominal
90 to 132 or 180 to 264V
(absolute limits)
Frequency: 47 to 63Hz
DC Output Supply:
Voltage: 24V DC (nominal)
22 to 26V (absolute limits)
Current: 6.25A
The F/O units consist of a receiver & transmitter, which modulates the RF signal onto a laser
carrier and transmits it via fibre/optic cable to a receiver unit some distance away where it is
demodulated back to the original RF signal with very small values of accrued attenuation.
Both transmitter and receiver modules have their own dedicated alarm outputs (volt-free relay
contacts) which are integrated into the main alarm system. Being O.E.M devices, no drawings
or circuit diagrams are available.
Caution: The FO units are
NOT
weather proof.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-65 of 65
5.1.11.2 Technical Specification
Power Consumption:
CNR @ 5 Km link length:
Tx: 120mA @ 15V DC (320mA @ -10BC)
Rx: 330mA @ 15V DC
Frequency Range: 0.1 – 2.2GHz
Link noise figure: 40dB (typical)
Link noise figure (max.): <45dB
Total link gain: 0dB
@30KHz B/W: >84dB
@200KHz B/W: >76dB
@1.2MHz B/W: >69dB
RF total input power: 0dBm
Input IP3: 26dBm
Optical budget: 2 – 9.0dB
Max. link length: 20Km
Response Flatness:
<±1.0 dB
Optical Output Power (Tx): 2.4 – 4.0mW
Optical Wavelength:
1310±10nm
Fibre loss: 0.38dB/Km
Optical return loss: -60dB
Optical Connector loss: 0.5dB per mated pair
Rx ‘D’ Type Female Connector
Pin No. Signal Description
1 +15V DC Power
2 Optional Data Output
3 Power Ground
4 RF Signal Strength Monitor
5 Optical Power Monitor
6 O.C. Alarm
7 Optional Data Output
8 Relay Alarm Contact 1
9 Relay Alarm Contact 2
Tx ‘D’ Type Female Connector
Pin No. Signal Description
1 +15V DC Power
2 Optional Data Input
3 Power Ground
4 RF Signal Strength Monitor
5 Laser Photodiode Current Monitor
6 Laser Current Monitor
7 Optional Data Input
8 Relay Alarm Contact 1
9 Relay Alarm Contact 2
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
H/book Number:-60-056100HBKM
Issue No:-1
Date:-13/02/2003
Page:-66 of 66
5.2 Location 2, Unit 2 (60-056102)
5.2.1 Two Section Notch Filter (02-010401)
5.2.1.1 Description
Fitted in Unit 2 after the amplification stages is a 2 element notch filter (one in downlink,
one in uplink), which is designed to reject the uplink frequencies in the downlink path and
vice-versa. The notch filter is not required for Unit One as the rejection from the two
series bandpass filters as apposed to one, is sufficient to meet the specification.
5.2.1.2 Technical Specification
Response type: Chebyshev
Frequency range: 485-486MHz
No. of sections: 2
Insertion loss: dB
Power Handling: 100W maximum
Temperature range:
Bandwidth: 1MHz (tuned to spec.)
VSWR: Better than 1.2:1
Connectors: SMA
operate: -20°C to +55°C
store: -40°C to +70°C
Weight: 3 kg
Size: 384 x 82.5 x 56.4mm
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-67 of 67
Number of Input ports
Number of Output ports
5.2.2 Crossband Couplers (07-004801 & 07-005705)
5.2.2.1 Description
The purpose of a crossband coupler is to either combine/split transmission signals from
different parts of the frequency spectrum.
The crossband coupler fitted here, is the means by which the separate UHF & GSM frequency
band signals are mixed to form a composite RF signal.
It basically comprises of a 3 port device, two filters, one a low pass the other a high pass, that
are then mixed and fed to a common output. The couplers are built into a machined aluminium
casing having a centre screening wall between the filter sections and lid secured by screws at
frequent intervals over its perimeter to obtain a tight seal and to ensure linearity and stability
of response.
5.2.2.2 Technical Specification (07-004801)
Part No: 07-004801
Passband:
390-490MHz
700-900MHz
No. Of i/p ports: 2
No. Of o/p ports: 1
Insertion loss: 0.5dB (typical)
Isolation:
>40dB 390-490MHz
>40dB 700-900MHz
Impedance: 50O
Connectors: SMA female
Power rating: 50Watts (CW)
5.2.2.3 Technical Specification
Passband 250 MHz
380 MHz
70-250 MHz
380-960 MHz
Power Rating 50 Watts (CW)
2
1
Insertion loss 0.5 dB
Isolation > 50 dB 70-250 MHz
> 50 dB 380-960 MHz
(15 dB typical return loss 500-960)
Impedance 50 O
Connectors SMA- female
All other modules in this unit are described elsewhere in this document.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-68 of 68
5.3 800MHz Bi-Directional Air Interface Amplifier (60-056103)
5.3.1 Bandpass Filter (02-007201)
5.3.1.1 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 slot coupled, folded
combline design, and are carefully aligned during manufacture in order to optimise the
insertion loss, VSWR and intermodulation characteristics of the unit. The tuned elements are
silver-plated to reduce surface ohmic losses and maintain a good VSWR figure and 50? load
at the input and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life and
require no maintenance. Should a filter be suspect, it is usually most time efficient to replace
the module rather than attempt repair or re-tuning.
No adjustments should be attempted without full network sweep analysis facilities to monitor
both insertion loss and VSWR simultaneously.
5.3.1.2 Technical Specification
Parameter Specification
Response Type Chebyshev
Frequency Range:
857-860MHz (downlink)
812-815MHz (uplink)
Bandwidth: 3MHz (tuned)
Number of Sections: 8
Insertion Loss: 1.2 dB
VSWR: better than 1.2:1
Connectors: SMA female
Power Handling: 100W max
-20°C to +60°C Temperature
-40°C to +70°C
range:
operation:
storage:
Weight:
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-69 of 69
5.3.2 ¼Watt 0- -30dB Switched Attenuator (10-000701) See section 5.1.2
The Gallium-Arsenide 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 and
extremely low noise 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. This amplifier features its own in-built alarm system which gives a volt-free relay
contact type alarm that is easily integrated into the main alarm system.
5.3.3.2 Technical Specification (11-005902)
Frequency Range: 800 – 960MHz
Bandwidth: <170MHz
Gain: 19.5dB (typical)
1dB Compression Point: 21dBm
OIP3: 33dBm
Input/Output Return Loss: >20dB
Noise Figure: 1dB (typical)
Power Consumption: 190mA @ 24V DC
Supply Voltage: 10-24V DC
Connectors: SMA female
Temperature Range:
operational: -10°C to +55°C
storage: -40°C to +70°C
Size: 90 x 55 x 30.2mm
Weight: 280gms (approximately)
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-70 of 70
5.3.3.3 Drg. No. 11-005902 LNA General Assembly Drawing
123456789
123456789
A
B
C
D
IN 2 PLACES
DC PCB
6
327
4
25
3
2
424
RF PCB
E
MNR
MNR
25/03/02
08/04/02
F
A
BYDATEDESCRIPTIONNo
ISSUE
3
11-005902
10
225
5
27
5
1623
1
L4
L2
C4
11-005925 ISS.1
R12
TR2
L6
C2
R6
C10
R3
R4
R10
CPL2
R13
R15
IN 2 PLACES
PRE-PRODUCTION ISSUE
2
2
20
PRODUCTION ISSUE(ECN2539)
AA
1A
1533
900MHz LOW NOISE AMPLIFIER
R46
R48
R11
L5
C1
R5
R1
R2
R14
R44R43
REG1
8263027
C9 R47
IC2
2
C7
2
1724
R49
R50
C12
R51
+
J3
C19
C16
J5
J4
J2 J1
C10
+
R52
C11
C8
C15
+
+
+
C13
R38
C6
+
REG3
R42
C17
+
+
IC3
C14
ZD3
R40
A B C
R59
IC4
k
D3
VR1
R41
+
R55
R53
R54
RL1
C5
+
R39
+
C4
CON1
VIN
R58
Limited
VOUT
Aerial Facilities
5
21222
2819
2
ITEMS 31,34 & 35,TO BE FITTED ON TEST
2. LIDS,ITEMS 2 & 3 AND LABELS,
1. SOLDER JOINTS TO BE MADE USING OR
WITH RELAY ASSEMBLY DRAWING
TITLE
CUSTOMER DRG.No
England
Aerial Facilities Ltd
Tel : 01494 777000
Fax : 01494 777002
1.5:1
IN 4 PLACES
see note 2
AFL
31
see note 2
AFL
34
SCALE
OUT
0086
DEVICES
SENSITIVE
FOR HANDLING
C
ELECTROSTATIC
OBSERVE PRECAUTIONS
ATTENTION
Aerial Facilities
Limited
********
11-005902
800-1000MHz
20dB 12-24vDC
**/**/20**
REF.
FREQ.
GAIN
S/N
DATE
AFL
D
IN
E
BY AERIAL FACILITIES LTD.
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
TWO DECIMAL PLACES ± 0.1mm
ONE DECIMAL PLACE ± 0.3mm
NO DECIMAL PLACE ± 1mm
TOLERANCES
IB
APPD
DATE
AC
ALL DIMENSIONS ARE IN mm
F
UNLESS OTHERWISE STATED
MNR25/03/02
DRAWN
CHKD
see note 2
35
LABEL DETAILS - SCALE 1:1
COMPONENTS TO BE ADDED TO 11-003912,ITEM 15,DC PCB SUB-ASSEMBLY
COMPONENTS TO BE ADDED TO 11-005911,ITEM 16,RF PCB SUB-ASSEMBLY
REFER TO CIRCUIT COMPONENT LIST FOR FURTHER INFORMATION
CLY2
G S
800-1000MHz LOW NOISE AMP. 29dB
(RF) PCB CIRCUIT DIAGRAM
TITLE
CUSTOMER DRAWING.No
England
Aerial Facilities Limited
56
Tel : 01494 777000
Fax : 01494 777002
15pF
R3
10R
4
-Ve1+Ve1
-Ve2+Ve2
C10C7C5
C4
CONNECTIONS TO DC BOARD
-
C9
100pF10nF
82nH
L1
R6R7
180R180R18R22R
123456789
A
B
C
100pF
TR1
ATF-33143
D
910R470R
G S
C1
100pF
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
C3C2
R1R2
C8
10nF100pF
SCALE
23
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
IB
APPD
DATE
1
ALL DIMENSIONS ARE IN mm
UNLESS OTHERWISE STATED
AC
RF INPUT
D
E
DBS18/2/02
DRAWN
CHKD
F
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
H/book Number:-60-056100HBKM
Issue No:-1
Date:-13/02/2003
Page:-76 of 76
5.3.3.9 Drg. No. 11-006771, LNA DC Wiring Diagram
123456789
A
9 WAY 'D'
PIN OUTS
CON1
10-24V DC I/P
1
2
GROUND
2 CON1
3
B
*
*
RELAY COMMON
RELAY CONTACT BAD
4
4 CON1
3 CON1
*
RELAY CONTACT GOOD
5
6
5 CON1
C
TTL VOLTAGE SET8TTL ALARM/0v GOOD9OC GOOD/0v BAD
7
7 CON1
8 CON1
9 CON1
D
RF
OUT
= ONLY APPLIES TO 11-006702
*
E
BYDATEDESCRIPTIONNo
DBS
19/2/02
ISSUE
PROTOTYPE ISSUE
AA
F
3
A
11-006771
C
+8V
REG3
LM7808CT
DC PCB
O
BA
G
I
J4 1
SEE 11-003971
FOR CIRCUIT DIAGRAM
J4 2
J5 1
J5 2
TITLE
800-1000MHz LOW NOISE AMPLIFIER 29dB
(RF AND DC) SCHEMATIC DIAGRAM
CUSTOMER DRAWING.No
England
Tel : 01494 777000
J5
J4
Aerial Facilities Limited
Fax : 01494 777002
-
+ve1 (6.75v @ 45mA)
-ve1
-ve2
+ve2 (6.75v @ 70mA)
DC INPUTDC OUTPUT
SCALE
SEE 11-006770
RF PCB
THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
NO DECIMAL PLACE ± 1mm
ONE DECIMAL PLACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
TOLERANCES
FOR CIRCUIT DIAGRAM
APPD
DATE
123456789
ALL DIMENSIONS ARE IN mm
ACIB
CHKD
F
UNLESS OTHERWISE STATED
IN
RF
A
B
C
D
E
DBS19/2/02
DRAWN
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
H/book Number:-60-056100HBKM
Issue No:-1
Date:-13/02/2003
Page:-77 of 77
5.3.4 5Watt Power Amplifier (12-000201)
5.3.4.1 Description
The power amplifier fitted to this unit is a multi-stage, solid state power amplifier. Class A
circuitry is employed throughout the device to ensure excellent linearity over a wide
dynamic frequency range. All the semi-conductor devices are very conservatively rated to
ensure low device junction temperatures and a long, trouble free working lifetime.
The power amplifier should require no maintenance over its operating life. Under no
circumstances should the cover be removed or the side adjustments disturbed unless it is
certain that the amplifier has failed; since it is critically aligned during manufacture and any
re-alignment will require extensive test equipment.
5.3.4.2 Technical Specification
PARAMETER SPECIFICATION
Frequency Range: 800 – 970MHz
Bandwidth: <200MHz
Gain: 34dB (typical)
Power Output: >5.0Watts
1dB Compression Point: +36dBm
OIP3: +47dBm
Input/Output Return Loss: >14dB
RF Connectors SMA female
Power Consumption: 1.5A @ 24V DC
Operation: -10°C to +55°C Temperature
Range
Storage: -40°C to +70°C
Size 250 x 125 x 38.6mm
Weight 400gms (approximately)
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-78 of 78
5.3.4.3 Drg. No. 12-000201, LPA General Assembly Drawing
A
B
C
D
E
F
19
25.00
==
25.00
==
DETAIL 3
G
H
2
A
12-000201
2522
1232
14
20.00
DETAIL 2
SEE NOTE 4
VIEW WITH LID
AND HEATSINK REMOVED
8.00
23
6.5 I/D
1.5 TURNS
C1
C2
C16
C15
+
L7
C17
REG1
R1
C3
L1
C4
9
22 25
33
L2
C34
R3
TR1
+
C19 C18
C20
20.00
DETAIL 1
SEE NOTE 4
8.00
3631
3 POS
23
6.5 I/D
1.5 TURNS
17
12
56789101112
4 POS
16
4
1337
C5
+
REG2
12-000225-2
R4
C24
+
C25
C26
+
REG3
R6
TR3
C29
R5
C30
C31
+
C33
C22 C21
L4
C23
C27
C28
L6
Aerial Facilities
Limited
C6
R2
L3
C7
TR2
C8
C9
L5
C10
C11
C37
C36
C12
C13
C14
11
SEE DETAIL 2
6 POS
24
27
14
3 POS
19 POS
35429
SEE DETAIL 3
10
119
9
2036
2
30
SEE NOTE 2
2
POWER AMPLIFIER,900MHz,ASSEMBLY
(WITHOUT HEATSINK)
(6 POSITIONS)
TITLE
CUSTOMER DRAWING No
England
Fax (01494)778910
Aerial Facilities Limited
Chesham(01494)778301
1:1
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.
TWO DECIMAL PLACES ± 0.1mm
ONE DECIMAL PLACE ± 0.3mm
NO DECIMAL PLACE ± 1mm
TOLERANCESSCALE
DATE
ALL DIMENSIONS ARE IN mm
DJS04/06/99
DRAWN
CHKDAPPD
DATEDESCRIPTIONNo
04/06/99
UNLESS OTHERWISE STATED
SEE DETAIL 1
26
123
NOTES:-
1/. ALL SOLDERED JOINTS TO BE MADE USING ITEM .
2/. APPLY ITEM TO THE UNDERSIDE OF TRANSISTORS TR1,TR2 & TR3 BEFORE FITTING.
3/. GREAT CARE MUST BE TAKEN WHEN FITTING TR1 & TR2 IN ORDER TO PREVENT OVERTIGHTENING (USE TORQUE DRIVER SET TO 59cNm).
4/. FERRITE BEADS TO BE SECURED TO RESPECTIVE INDUCTORS USING NON-CORROSIVE SILICON RUBBER.
NOTE TURN ORIENTATION L1,L3 & L5 (DETAIL 1) ARE WOUND IN OPPOSITE DIRECTION TO L2,L4 & L6 (DETAIL 2).
5/. A THIN FILM OF ITEM 26 TO BE APPLIED TO MATING SURFACES OF ITEMS 1 & 3.
93-200009560pF CHIP CAPACITOR 10% TOL (MIN)
C16
C17
C18
93-100049
C19
93-140001
C20
93-100049
C21
93-200009
C22
93-140001
C23
93-200009
C24
93-100049
C25
93-140001
C26
93-100049
C27
93-200009
C28
93-140001
C29
93-200009
C30
93-100049
C31
93-140001
C32
93-11000310uF 63V ELECTROLYTIC CAPACITOR
C33
93-11000310uF 63V ELECTROLYTIC CAPACITOR
1-14pF PCB MOUNT AIR TRIMMER CAPACITOR93-130023
1.5-6pF PCB CERAMIC AIR TRIMMER CAPACITOR93-130014
1-14pF PCB MOUNT AIR TRIMMER CAPACITOR93-130023
56pF CHIP CAPACITOR 10% TOL (MIN)93-200006
1-14pF PCB MOUNT AIR TRIMMER CAPACITOR
10pF CHIP CAPACITOR 10% TOL (MIN)93-200010
56pF CHIP CAPACITOR 10% TOL (MIN)93-200006
1-14pF PCB MOUNT AIR TRIMMER CAPACITOR
15pF CHIP CAPACITOR 10% TOL (MIN)93-200005
15pF CHIP CAPACITOR 10% TOL (MIN)93-200005
1-14pF PCB MOUNT AIR TRIMMER CAPACITOR
1-14pF PCB MOUNT AIR TRIMMER CAPACITOR
10nF 100V CERAMIC DISK CAPACITOR93-100049
1uF 35V TANTALUM CAPACITOR93-140001
10nF 100V CERAMIC DISK CAPACITOR
1uF 35V TANTALUM CAPACITOR
10nF 100V CERAMIC DISK CAPACITOR
560pF CHIP CAPACITOR 10% TOL (MIN)
1uF 35V TANTALUM CAPACITOR
560pF CHIP CAPACITOR 10% TOL (MIN)
10nF 100V CERAMIC DISK CAPACITOR
1uF 35V TANTALUM CAPACITOR
10nF 100V CERAMIC DISK CAPACITOR
560pF CHIP CAPACITOR 10% TOL (MIN)
1uF 35V TANTALUM CAPACITOR
560pF CHIP CAPACITOR 10% TOL (MIN)
10nF 100V CERAMIC DISK CAPACITOR
1uF 35V TANTALUM CAPACITOR
A
B
C
D
E
F
1A
04/06/99PROD ISS.
ISSUE
G
Aerial Facilities Limited
DRAWNDATE
DJS
04/06/99
CHKD
APPD
TITLE
POWER AMPLIFIER,900MHz,PCB
CIRCUIT COMPONENT LIST (SHEET 1 OF 3)
5.3.4.8 Drg. No. 12-002450, LPA to Alarm Board DC Wiring Details
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-84 of 84
5.3.5 3 Stage Alarm Board (12-002201) See section 5.1.4
5.3.6 DC/DC Converter (13-003011) See section 5.1.6
5.3.7 Channel Control & Channel Selective Modules (17-002101 & 17-003002)
5.3.7.1 Channel Selective Module Description
The channel selectivity module is employed when the Cell Enhancer requirement dictates that
very narrow bandwidths (single operating channels), must be selected from within the
operating passband. One channel selectivity module is required for each channel.
The Channel Selectivity Module is an Up/Down frequency converter that mixes the incoming
channel frequency with a synthesised local oscillator, so that it is down-converted to an
Intermediate Frequency (IF) in the upper HF range. An eight pole crystal filter in the IF
amplifier provides the required selectivity to define the operating passband of the Cell
Enhancer to a single PMR channel. The same local oscillator then converts the selected IF
signal back to the channel frequency.
Selectivity is obtained from a fixed bandwidth block filter operating at an intermediate
frequency (IF) in the low VHF range. This filter may be internal to the channel selectivity
module (Crystal or SAW filter) or an externally mounted bandpass filter, (LC or Helical
Resonator). Various IF bandwidths can therefore be accommodated. A synthesized Local
Oscillator is employed in conjunction with high performance frequency mixers, to translate
between the signal frequency and IF.
The operating frequency of each channel selectivity module is set by the programming of
channel selectivity module frequencies and is achieved digitally, via hard wired links, banks of
DIP switches, or via an onboard RS232 control module, providing the ability to remotely set
channel frequencies.
Automatic Level Control (ALC) is provided within each channel selectivity module such that
the output level is held constant for high level input signals. This feature prevents saturation of
the output mixer and of the associated amplifiers.
Alarms within the module inhibit the channel if the synthesised frequency is not locked. The
synthesiser will not usually go out of lock unless a frequency far out of band is programmed.
The channel selectivity module is extremely complex and, with the exception of channel
frequency programming within the design bandwidth, it cannot be adjusted or repaired without
extensive laboratory facilities and the necessary specialised personnel. If a fault is suspected
with any channel selectivity module it should be tested by substitution and the complete,
suspect module should then be returned to AFL for investigation.
The control module consists of a bank of four, in-line data switches each of which control
one channel module frequency setting. One controller unit can therefore control four
channel modules. The following list shows the frequencies available for each switch
setting.
5.3.7.4 Channel Controller Frequencies
IDC PIN 25-way Connector Function
1 13 Freq. bit 1 (12.5kHz)
2 25 Freq. bit 2 (25kHz)
3 12 Freq. bit 3 (50kHz)
4 24 Freq. bit 4 (100kHz)
5 11 Freq. bit 5 (200kHz)
6 23 Freq. bit 6 (400kHz)
7 10 Freq. bit 7 (800kHz)
8 22 Freq. bit 8 (1.6MHz)
9 9 Freq. bit 9 (3.2MHz)
10 21 Freq. bit 10 (6.4MHz)
11 8 Freq. bit 11 (12.8MHz)
12 20 Freq. bit 12 (25.6MHz)
13 7 Freq. bit 13 (51.2MHz)
14 19 Freq. bit 14 (102.4MHz)
15 6 Freq. bit 15 (204.8MHz)
16 18 Freq. bit 16 (409.6MHz)
17 5 Module alarm
18 17 Gain bit 1
19 4 Gain bit 2
20 16 Gain bit 3
21 3 Gain bit 4
22 15 +5V
23 2 0V
24 14 Switched 12V
25 1 0V
26 --- ---
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.
6.2 General
The size and weight of the wall units mean that they represent a significant health hazard
unless they are mechanically installed in the correct manner. In the interests of safety this
should be done before any electrical, RF, or optical connections are made.
It is important in determining the location of the wall units that space is allowed for access to
the front and underneath of the equipment. To enable maintenance to be carried out, the door
must be able to fully open. The location must be served with a duct to allow the entry of
cables into the unit.
6.3 Electrical Connections
The mains power supply and the alarms are connected through an IP65 connector which
should need no further attention once connected. It is recommended that the AC power
connection is approved by a qualified electrician, who must satisfy himself that the supply will
be the correct voltage and of sufficient capacity.
All electrical and RF connection should be completed and checked prior to power being
applied for the first time.
6.4 Optical Connections
The optical input and output ports are be located on a bracket fixed to the lower inside of the
case. The optical fibres from the tunnels enter through a cable gland on the case underside
The ports are supplied with a green plastic cover, which must be removed prior to the
connection of the fibre cable. Ensure that transmitter and receiver fibre cable are identified to
prevent misconnection. At the master site, the fibre transmitters are in the downlink path with
the receivers in the uplink. At the remote sites the fibre transmitters are in the uplink with the
receivers in the downlink. Where some of the fibre optic transmitter outputs are split with
optical couplers to provide a connection to more than one remote site, care must be taken to
ensure that the correct connections are made.
Ensure that connections are kept clean and are fully tightened.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-88 of 88
6.5 RF Connections
All RF connections are made to the cable termination, located on the right-hand side of the
wall enclosure. Care must be taken to ensure that the correct connections are made with
particular attention made to the base station TX/RX ports. In the event that the base
transmitter is connected to the RX output of the rack, damage to the equipment may be done
if the base station transmitter is then keyed. If the environment where the equipment is
installed is deemed to be ‘wet’ i.e. water seepage through roofs or walls, then suitable
methods to seal the RF N type connectors should be used, for example self amalgamating
sealant tape.
Ensure that connections are kept clean and are fully tightened.
6.6 Commissioning
Once all connections are made the equipment is ready for commissioning.
To commission the system the test equipment detailed in section 7.2 will be required.
Using the system diagrams and the end-to-end test specification, the equipment should be
tested to ensure correct operation. Typical RF levels that are not listed in the end-to-end
specification, such as input levels to the fibre transmitters are detailed in the whole system
diagram in section 4.
On initial power up the system alarm indicators on the door of the equipment should be
checked. A red LED illuminated indicates a fault and that particular module must be
investigated before proceeding with the commissioning. A green LED illuminates, to indicate
that the power supply is connected and valid.
The individual fibre optic units are fitted with a pair of status indicators on their front panels.
One is a green LED, which indicates that the unit is connected to a 15 Volt power supply.
This indicator is common to both transmit and receive units. The second LED on the
transmitter indicates that the laser is operating. On the receive unit the second LED indicates
that a light signal is being received.
When all the fibre connections are completed and power to each site is connected each fibre
unit should show two illuminated indicators.
In the event that any part of the system does not function correctly as expected, check all
connections to ensure that they are to the correct port, that the interconnecting cables are not
faulty and that they are tightened. The majority of commissioning difficulties arise from
problems with the interconnecting cables and connectors.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-89 of 89
7. MAINTENANCE
7.1 General Procedures
7.1.1 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 within a
wall mounted, environmentally protected enclosure.
Transmissions from the main base stations are passed though the system to the mobile radio
equipment; this could be a handheld walkie-talkie, mobile telephone 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 (optional) 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 digital RS232 Cell Enhancer Management
System, if fitted), or locally with the front door LED’s. The green LED on the front door
should be illuminated, while the red alarm indicator should be off.
If an Alarm is on, then that individual module must be removed and tested against the original
test specification.
The individual amplifier units have a green LED showing through a hole in their piggy-back
alarm board (or directly through a hole in the the amplifier lid), 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
and amplifier specification 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 logical manner to confirm correct operation.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-90 of 90
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, tuned cavities or 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. If spare parts need
to be ordered from AFL, be sure to quote the serial number of the Cell Enhancer/Repeater
and the serial number [and frequencies] of the module(s) to be replaced.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-91 of 91
7.1.5 Checking service
Following the repair of any part of the system it is recommended that a full end-to-end test is
carried out in accordance with the test specification and that the coverage is checked by
survey.
It is important to bear in mind that the system includes a radiating cable network and base
stations that may be faulty or may have been damaged.
7.1.6 Service Support
Advice and assistance with maintaining and servicing this system are available by contacting
Aerial Facilities Ltd.
7.2 Tools & Test Equipment
The minimum tools and test equipment needed to successfully service this AFL product are as
follows:-
Spectrum analyser: 100kHz to 2GHz (Dynamic range = 90dB).
Signal Generator: 30MHz to 2GHz (-120dBm to 0dBm o/p level).
Attenuator: 20dB, 10W, DC-2GHz, (N male – N female).
Test Antenna: Yagi or dipole for operating frequency.
Digital multi-meter: Universal Volt-Ohm-Amp meter.
Test cable x 2: N male – N male, 2M long RG214.
Test cable x 2: SMA male – N male, 1m long RG223.
Hand tools: Philips #1&2 tip screwdriver.
3mm flat bladed screwdriver.
SMA spanner and torque setter.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-92 of 92
7.3 Care of Modules
7.3.1 General Comments
Many of the active modules contain semiconductor devices utilising MOS technology, which
can be damaged by electrostatic discharge. Correct handling of such modules is mandatory to
ensure their long-term reliability.
To prevent damage to a module, it must be withdrawn/inserted with care. The module may
have connectors on its underside, which might not be visible to the service operative.
7.3.2 Module Removal (LNA’s, general procedure):
The following general rules should be followed to remove a module:
1 Remove power to the unit
2 Remove all visible connectors (RF, DC & alarm)
3 Release module retaining screws.
4 Slowly but firmly, pull the module straight out of its position. Take care not to twist/turn
the module during withdrawal. (When the module is loose, care may be needed, as there
may be concealed connections underneath).
7.3.3 Module Replacement (general):
1 Carefully align the module into its location then slowly push the module directly straight
into its position, taking care not to twist/turn it during insertion.
2 Reconnect all connectors, RF, alarm, power etc.,(concealed connectors may have to be
connected first).
3 Replace retaining screws (if any).
4 Double-check all connections before applying power.
7.3.4 Power Amplifiers
1) Remove power to the unit. (Switch off @ mains/battery, or remove DC in connector)
2) Remove alarm wires from alarm screw terminal block or disconnect multi-way alarm
connector.
3) Carefully disconnect the RF input and output coaxial connectors (usually SMA)
If alarm board removal is not required, go to step 5.
4) There is (usually) a plate attached to the alarm board which fixes it to the amplifier,
remove its retaining screws and the alarm board can be withdrawn from the amplifier in its
entirety. On certain types of amplifier the alarm board is not mounted on a dedicated
mounting plate; in this case it will have to firstly be removed by unscrewing it from the
mounting pillars, in most cases, the pillars will not have not have to be removed before
lifting the amplifier.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-93 of 93
5) If the amplifier to be removed has a heatsink attached, there may be several different ways
it can have been assembled. The most commonly used method, is screws through the front
of the heatsink to threaded screw holes (or nuts and bolts), into the amplifier within the
main case. If the heatsink is mounted on the rear of the main case (e.g., against a wall in
the case of wall mounted enclosures), then the fixing method for the heatsink will be from
within the case, (otherwise the enclosure would have to be removed from the wall in order
to remove the heatsink).
When the heatsink has been removed, the amplifier may be unscrewed from the main
casing by its four corner fixings and gently withdrawn.
Fitting a new power amplifier module will be the exact reverse of the above.
Note: Do not forget to apply fresh heatsink compound to the heatsink/main case
joint and also between the amplifier and the main case.
7.3.5 Low Power Amplifier Replacement
1 Disconnect the mains power supply and disconnect the 24V dc supply connector for the
LPA.
2 Disconnect the RF input and output cables from the LPA.
3 Disconnect the alarm connector.
4 Remove the alarm monitoring wires from (D type connector) pins 9 and 10.
5 Remove the LPA module by removing the four retaining screws, replace with a new LPA
module and secure it with the screws.
6 Connect the RF cables to the LPA input and output connectors. Reconnect the wires to
the alarm board connector pins 9 and 10.
7 Reconnect the DC supply connector and turn the mains switch on.
Note: Tighten SMA connectors using only a dedicated SMA torque spanner. If
SMA connectors are over-tightened, irreparable damage will occur. .
Do not use
adjustable pliers to loosen/tighten SMA connectors.
Also take care not to drop or knock the module as this can damage (or misalign in the
case of tuned passive modules) sensitive internal components. Always store the modules
in an environmentally friendly location
7.3.6 Module Transportation:
To maintain the operation, performance and reliability of any module it must be stored and
transported correctly. Any module not installed in a whole system must be kept in an antistatic bag or container. These bags or containers are normally identified by being pink or
black, and are often marked with an ESD label. Any module sent back to AFL for
investigation/repair must be so protected. Please contact AFL’s quality department before
returning a module.
H/book Number:-60-056100HBKM
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
Issue No:-1
Date:-13/02/2003
Page:-94 of 94
APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS
GENERAL INFORMATION
Site Name: Client Name:
Date: AFL Equip. Model No.
ANTENNA SYSTEMS
A - Service Antenna
B – Donor Antenna
– Service Feeder
C
D – Donor Feeder
G – Input signal level from donor BTS
Parameter Comments Value
Input signal level (G)
CE max. o/p power (E)
Service antenna gain (A)
Service antenna feeder loss (C)
Effective radiated power (ERP)
Model Gain Azimuth Comments
Type Loss Length Comments
INITIAL PARAMETERS
E – CE Output Power
F – Antenna Isolation
Operating Voltage V
DOWNLINK CALCULATIONS
dBm
dBm
Gain setting
Isolation required
Attenuator setting
E - G
(Gain + 10dB) dB
dB
dB
E+A-C
CE gain-gain setting dB
dBm
dB
dBm
dBm
If the input signal level in the uplink path is known and steady, use the following calculation
table to determine the gain setting. If the CE features Automatic Gain Control the attenuator
should be set to zero and if not, then the attenuation setting for both uplink and downlink
should be similar.
UPLINK CALCULATIONS
Parameter Comments Value
Input signal level
CE max. o/p power (E)
Gain setting
Required isolation
Donor antenna gain (B)
Donor antenna feeder loss (D)
Effective radiated power (ERP)
Attenuator setting
(CE gain-gain setting) dB
dBm
dBm
dB
dB
dB
dB
E+B-D
dBm
dB
P B L Tunnels Loc 2 Units 1 & 2 + 800MHz BDA
Maintenance Handbook
H/book Number:-60-056100HBKM
Issue No:-1
Date:-13/02/2003
Page:-95 of 95
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.