PBE Europe as Axell Wireless 50-1285SERIES UHF Channelised Repeater type 50-128501 User Manual

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Document Author:	dwinstanley

Two Channel 400MHz
Cell Enhancer
User Handbook
For
AFL Inc.
AFL Works Order Nō.:
AFL product part Nō.:
Q112941
50-128501
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-1 of 39
Table of Contents
AMENDMENT LIST RECORD SHEET ...................................................................................................4
INTRODUCTION.........................................................................................................................................5
Scope ........................................................................................................................................................................... 5
Purpose ....................................................................................................................................................................... 5
Glossary of Terms...................................................................................................................................................... 6
Key to AFL RF Module Drawing Symbols ............................................................................................................. 7
1.
SAFETY CONSIDERATIONS.........................................................................................................8
1.1
1.2
1.3
1.4
1.5
2.
3.
Earthing of Equipment ................................................................................................................................ 8
Electric Shock Hazard.................................................................................................................................. 8
RF Radiation Hazard ................................................................................................................................... 9
Chemical Hazard ........................................................................................................................................ 10
Emergency Contact Numbers.................................................................................................................... 10
OVERVIEW/SYSTEM DESCRIPTION .......................................................................................11
SPECIFICATIONS..........................................................................................................................12
3.1
3.2
3.3
3.4
3.5
4.
Description .................................................................................................................................................. 12
Electrical Specification............................................................................................................................... 12
Mechanical Specification............................................................................................................................ 13
System Diagram.......................................................................................................................................... 14
Parts Lists.................................................................................................................................................... 15
SUB-UNIT MODULES....................................................................................................................17
4.1
4.1.1
4.1.2
4.2
4.2.1
4.2.2
4.3
4.3.1
4.3.2
4.4
4.4.1
4.4.2
4.5
4.5.1
4.5.2
4.5.3
4.6
4.6.1
4.6.2
4.7
4.7.1
4.7.2
4.7.3
4.7.4
4.8
4.8.1
4.8.2
4.9
4.9.1
4.9.2
4.10
UHF Notch Filter (02-020001) ................................................................................................................... 17
Description ............................................................................................................................................... 17
Technical Specifications ........................................................................................................................... 17
Bandpass Filters (02-011204 & 02-013401) .............................................................................................. 18
Description ............................................................................................................................................... 18
Technical Specification............................................................................................................................. 18
30dB Power Monitor (07-012501) ............................................................................................................. 19
Description ............................................................................................................................................... 19
Technical Specification............................................................................................................................. 19
¼Watt 0- -30dB Switched Attenuator (10-000701).................................................................................. 19
General Application ................................................................................................................................. 19
Switched Attenuators ................................................................................................................................ 19
Low Noise Amplifier (11-007402).............................................................................................................. 20
Description ............................................................................................................................................... 20
Technical Specification............................................................................................................................. 20
LNA ‘D’ Connector Pin-out details .......................................................................................................... 20
1Watt Low Power Amplifier (11-007901)................................................................................................. 21
Description ............................................................................................................................................... 21
Technical Specifications ........................................................................................................................... 21
5Watt Medium Power Tetra Amplifier (12-021601) ............................................................................... 22
Description ............................................................................................................................................... 22
Technical Specification............................................................................................................................. 22
PA 7-Way Connector Pin-outs.................................................................................................................. 22
PA Connector (7) Pin-Outs ...................................................................................................................... 23
Single DC/DC Converters (13-001704 & 13-001710) .............................................................................. 24
Description ............................................................................................................................................... 24
Technical Specification............................................................................................................................. 24
Controller/Monitor Board (17-005803) .................................................................................................... 25
Description ............................................................................................................................................... 25
Drg. Nō. 17-005880, Controller/Monitor PCB Pin-Outs......................................................................... 26
Channel Selective Modules (17-009304 & 17-009305)............................................................................. 27
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-2 of 39
4.10.1
Description ........................................................................................................................................... 27
4.10.2
Drg. Nō. 17-003080, Generic Channel Module Block Diagram.......................................................... 28
4.11
12V Single Relay Board (80-008901) ........................................................................................................ 29
4.11.1
Description ........................................................................................................................................... 29
4.12
PP9 NiCad Backup Battery (96-000017) ................................................................................................. 29
4.13
15V Switch-Mode PSU (96-300054) .......................................................................................................... 30
4.13.1
Description ........................................................................................................................................... 30
4.13.2
Technical Specification......................................................................................................................... 30
4.14
MT2834ZDXK 56kBPS Modem (96-800003)........................................................................................... 30
4.14.1
Description ........................................................................................................................................... 30
5.
5.1
5.2
5.3
5.4
5.5
5.6
5.7
6.
INSTALLATION .............................................................................................................................31
Initial Installation Record.......................................................................................................................... 31
Antenna Installation & Gain Calculations ............................................................................................... 31
Antenna Isolation........................................................................................................................................ 32
General Remarks........................................................................................................................................ 33
Electrical Connections................................................................................................................................ 33
RF Connections........................................................................................................................................... 33
RS232 Setup ................................................................................................................................................ 33
MAINTENANCE .............................................................................................................................34
6.1
General Procedures .................................................................................................................................... 34
6.1.1
Quick Fault Checklist ............................................................................................................................... 34
6.1.2
Fault Finding............................................................................................................................................ 34
6.1.3
Downlink................................................................................................................................................... 35
6.1.4
Uplink ....................................................................................................................................................... 35
6.1.5
Fault repair............................................................................................................................................... 35
6.1.6
Checking service....................................................................................................................................... 36
6.1.7
Service Support......................................................................................................................................... 36
6.2
Tools & Test Equipment ............................................................................................................................ 36
6.3
Care of Modules.......................................................................................................................................... 37
6.3.1
General Comments ................................................................................................................................... 37
6.3.2
Module Removal (LNA’s, general procedure): ........................................................................................ 37
6.3.3
Module Replacement (general): ............................................................................................................... 37
6.3.4
Power Amplifiers ...................................................................................................................................... 37
6.3.5
Low Power Amplifier Replacement .......................................................................................................... 38
6.3.6
Module Transportation: ........................................................................................................................... 38
APPENDIX A
INITIAL EQUIPMENT SET-UP CALCULATIONS.................................................39
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-3 of 39
AMENDMENT LIST RECORD SHEET
Issue
Nō.
Date
Incorporated
by
10/11/04
CMH
1st Draft
CMH
1st Issue
Page No.’s
Amended
Reason for new issue
Document Ref:-50-113901HBK
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-4 of 39
INTRODUCTION
Scope
This handbook is for use solely with the equipment identified by the AFL Part Number
shown on the front cover. It is not to be used with any other equipment unless specifically
authorised by Aerial Facilities Limited.
Purpose
The purpose of this handbook is to provide the user/maintainer with sufficient information to
service and repair the equipment to the level agreed. Maintenance and adjustments to any
deeper level must be performed by AFL, normally at the company’s repair facility in
Chesham, England.
This handbook has been prepared in accordance with BS 4884, and AFL’s Quality
procedures, which maintain the company’s registration to BS EN ISO 9001:2000 and to the
R&TTE Directive of the European Parliament. Copies of the relevant certificates and the
company Quality Manual can be supplied on application to the Quality Manager.
This document fulfils the relevant requirements of Article 6 of the R&TTE Directive.
Limitation of Information Notice
This manual is written for the use of technically competent operators/service persons. No
liability is accepted by AFL for use or misuse of this manual, the information contained
therein, or the consequences of any actions resulting from the use of the said information,
including, but not limited to, descriptive, procedural, typographical, arithmetical, or listing
errors.
Furthermore, AFL does not warrant the absolute accuracy of the information contained
within this manual, or it’s completeness, fitness for purpose, or scope.
AFL has a policy of continuous product development and enhancement, and as such,
reserves the right to amend, alter, update and generally change the contents, appearance and
pertinence of this document without notice.
All AFL products carry a twelve month warranty from date of shipment. The warranty is
expressly on a return to base repair or exchange basis and the warranty cover does not extend
to on-site repair or complete unit exchange.
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-5 of 39
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 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
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-6 of 39
Key to AFL RF Module Drawing Symbols
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-7 of 39
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.
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-8 of 39
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.
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-9 of 39
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
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-10 of 39
2.
OVERVIEW/SYSTEM DESCRIPTION
This equipment is designed to enhance one 275kHz spaced channel in the 400MHz UHF
band, and one IF select channel having 1.45MHz bandwidth also in the 400MHz band
using 5 and 1Watt amplifiers on the downlink and uplink paths respectively.
An RS232 controller/monitor together with a modem is fitted to provide remote
monitoring of all active alarms and to allow remote re-configuration of channel module
frequencies. See the RS232 controller/monitor handbook (17-005801HBKM) for more
details on this feature.
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-11 of 39
3.
SPECIFICATIONS
3.1
Description
See section 2.
3.2
Electrical Specification
PARAMETER
(Area) downlink:
(Police) downlink:
Frequency bands
(Area) uplink:
(Police) uplink:
Nō. of Channels:
Downlink1 bandwidth:
Downlink2 bandwidth:
Passband Ripple:
Gain:
Gain Adjustment:
Uplink ALC setting:
Downlink ALC setting:
O/P
Downlink:
Power/Channel
Uplink:
@ Ant. Port
O/P 1dB compression @ antenna port:
Uplink noise:
Temperature
operation:
range
storage:
VSWR:
Impedance:
Power Supply Requirement:
Alarms fitted (RS232):
SPECIFICATION
489.5125-490.9625MHz
496.3375-496.6125MHz
492.5125-493.9625MHz
499.3375-499.6125MHz
2 (one IF select 1.45MHz b/w)
1.45MHz
275kHz
±1.5dB
>90dB
30dB in 2 dB steps
+28dBm
+35dBm
28dBm
24dBm
37.5dBm
>5dB
-10°C to +55°C
-40°C to +70°C
Better than 1.5:1
50Ω
110V AC single phase
Amplifiers, PSU, Door, Temperature
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-12 of 39
3.3
Mechanical Specification
PARAMETER
SPECIFICATION
Height:
620mm
Case size
Width:
620mm
Depth:
250mm
(excluding heatsinks, connectors, handles and feet)
Fixings:
4 holes on 670(w) x 558(h)mm
Temperature range:
operational: -10°C to +60°C
storage:
-40°C to +70°C
Weight: >30kg (approximately)
RF Connectors: N type female
Environmental Protection: IP65 (with door closed and all ports terminated)
Case:
To RAL 7035
Finish:
Heatsinks: Matt black (where fitted)
Handles: Black technopolymer
Unit supplied with suitable supply input leads with
Supply Cable:
connector and appropriate length of cable
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-13 of 39
3.4
System Diagram
Q112941 50-128501
489.5125-490.9625
30dB
496.3375-496.6125
11-007402
30dB
11-007402
dB
10-000701
0dB
11-007402
dB
10-000701
0dB
30dB
30dB
12-021601
30dB
17-009304
30dB
11-007402
30dB
BASE
30dB
17-009305
02-020001
11-007901
37dB
492.5125-493.9625
11-007901
37dB
499.3375-499.6125
11-007402
30dB
MOBILE
0dB
17-009305
11-007402
30dB
0dB
17-009304
dB
10-000701
dB
10-000701
30dB
11-007402
30dB
11-007402
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-14 of 39
3.5
Parts Lists
AFL Part Nō.
02-020001
02-011204
02-013401
07-012501
10-000701
11-007402
11-007901
12-021601
13-001704
13-001710
13-003301
17-000126
17-000526
17-002020
17-002103
17-003022
17-003023
17-003024
17-003025
17-003028
17-003029
17-005803
17-005820
17-005821
17-005822
17-009304
17-009305
80-008901
80-032320
80-310420
90-100003
90-400006
91-030002
91-130001
91-500011
91-500015
91-500016
91-600001
91-600014
91-640004
91-660001
91-700015
Part Description
UHF 2 SECTION NOTCH FILTER SMA
6P TETRA C/L FILT(1.5-4MHz) SMA
6P CL FLTR(0.5 min BW)LARGE SMA ASSY
POWER MONITOR UHF DUAL
0.25W 0-30dB SWITCHED ATTENUATOR
LNA. 380-500MHz 30dB (C/W RELAY) GA
AMPLIFIER TETRA 1W 37dB GAIN ASS
TETRA 5W +12V AMPLIFIER
VOLTAGE REGULATOR BOARD 9.0V
VOLTAGE REGULATOR BOARD 5.0V
MAINS FILTER 8AMP ASSEMBLY
CELL ENHANCER LABEL 6 DIGIT
CE 10/20W HEATSINK THERMAL GASKET
PLEASE USE KIT 17-002020K
26WAY RIBBON CABLE LEAD
MODULE PATTERNED LEAVE
SUBRACK SIDE PANEL
SUBRACK REAR BRACKET
BOTTOM MODULE GUIDE
MODULE SQUARE LEAVE
TOP MODULE GUIDE
CONTROLLER MONITOR BOARD 12V
MONITOR/CONTROLLER COVER
MON/CONTROLLER ACCESS PLT LRG
MON/CONTROLLER ACCESS PLT SML
UHF CHAN MOD 480-500MHz, 400kHz B/W
UHF CHAN MOD 480-500MHz, 2 MHz B/W
12V RELAY PCB ASSEMBLY
10W PA HEATSINK
BCC 400W POWER SUPPLY HEATSINK
MAINS LEAD '6 AMP'
ALARM LEADS
N ADAPTOR PANEL FEMALE:FEMALE
SMA ADAPT 'T' ALL FEMALE 3 GHz
PWR 3POLE PNL PLUG SEALED IP68
PWR CON CAP SEALED with INT. THREAD
PWR 6POLE PNL PLUG SEALED IP68
'D'TYPE 9 WAY PLUG S/B TERM
'D' 9 WAY SOCKET S/B (NON FILTERED)
LARGE PIN FOR 91-660001 D SOCKET
2W5 MIXED D TYPE SOCKET (7 WAY)
ICD 10 WAY IDC CONNECTOR
Qty.
Two Channel 400MHz Cell Enhancer
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Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-15 of 39
91-700017
92-120009
92-280033
92-280044
92-400017
93-510041
94-120003
96-000017
96-000018
96-300057
96-700034
96-700035
96-800003
96-900018
96-920011
96-920012
97-000001
97-000002
97-300010
97-400010
97-600001
97-600002
97-900004
99-200017
ICD 15 WAY 0.1' CONNECTOR
M20 IP68 CABLE GLAND
Captive Screw
SCREW SLOTTED COLLAR
GASKET FOR N TYPE CONNECTOR
27R 1.6W % RESISTOR H:P PR37
1645 SCH0TTKY DIODE 16A MBR
PP9 NiCad BATTERY
CONNECTOR FOR PP9 BATTERY
15V 27A PSU 400W (XP BCC)
LED RED 5mm IP67
LED GREEN 5mm IP67
MT2834ZDXK 56kBPS MODEM WORLD
AC TRIP SWITCH (5 AMP M.C.B.)
PROXIMITY SWITCH
PROXIMITY SWITCH MAGNET
'SAREL' S/S HEAVY DUTY WALL BKT (4)
BLACK MODULE CAGE RUNNER
C/E SUPPLY INPUT COVER
BLACK PLASTIC HANDLE 50mm HIGH
SUBRACK FRONT HORIZ
SUBRACK M2.5 STD TAP
RUBBER FOOT FOR CELL ENHANCERS
CAUTION HEAVY LABEL 75 x 55mm
20
20
20
Highlighted items appear in ‘Sub-Unit Modules’ section.
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-16 of 39
4.
SUB-UNIT MODULES
4.1
4.1.1
UHF Notch Filter (02-020001)
Description
The notch reject filters fitted here are tuned to eliminate the unwanted channel frequencies of
the band 1 amplifier (where the filters are fitted in the band 2 path and vice-versa).
The filters should require no routine maintenance, being totally passive devices. If a filter is
suspected of failure, no invasive measures are recommended as even opening the case of the
device could render it unusable.
4.1.2
Technical Specifications
PARAMETER
Passband1
Passband2
Stopband1:
Stopband2:
Insertion Loss:
Rejection:
Power Rating
Impedance
VSWR
SPECIFICATION
492.5-494 & 490.6MHz
481-489 & 496.3-496.6MHz
496.3 & 496.5MHz
492.5-494, 496.3-496.6 & 494-494.5MHz
0.6dB typical
40dB typical
50 Watt
50Ω
Better than 1.22:1
Two Channel 400MHz Cell Enhancer
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Page:-17 of 39
4.2
4.2.1
Bandpass Filters (02-011204 & 02-013401)
Description
The bandpass filters are multi-section designs with a bandwidth dependent upon the passband
frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev
with a passband design ripple of 0.1dB. The filters are of combline design, and are carefully
aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation
characteristics of the unit. The tuned elements are silver-plated to reduce surface ohmic losses
and maintain a good VSWR figure and 50Ω load at the input and output ports.
Being passive devices, the bandpass filters should have an extremely long operational life and
require no maintenance. Should a filter be suspect, it is usually most time efficient to replace
the module rather than attempt repair or re-tuning.
4.2.2
Technical Specification
Passband:
Insertion Loss:
Isolation:
FILTER 1
FILTER 2
FILTER 3
FILTER 3
FILTER 1
FILTER 2
FILTER 3
FILTER 3
FILTER 1
FILTER 2
FILTER 3
FILTER 4
Impedance:
489.5-491 MHz
(02-011204)
496.3-496.7 MHz
(02-013401)
492.5-494 MHz
(02-011204)
499.3-499.7 MHz
(02-013401)
3.0 dB
(02-011204)
3.5 dB
(02-013401)
3.0 dB
(02-011204)
3.5 dB
(02-013401)
MAX(>40dB)
(02-011204)
MAX (>40dB)
(02-013401)
MAX (>40dB)
(02-011204)
MAX (>40dB)
(02-013401)
50 ohm
Two Channel 400MHz Cell Enhancer
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Handbook Nō.-50-128501HBK
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Date:-12/08/2005
Page:-18 of 39
4.3
4.3.1
30dB Power Monitor (07-012501)
Description
The purpose of these couplers is to tap off known portions (usually 15-30dB) of RF signal
from transmission lines at the antenna ports, either resistively or by induction, and to
combine them, for example through splitter units for different purposes (alarms/monitoring
etc.), whilst maintaining an accurate 50Ω load to all ports/interfaces throughout the specified
frequency range. They are formally known as directional couplers as they couple power
from the RF mainline in one direction only.
Various constructional techniques are used depending on the specification required. These
include microstrip, stripline, coaxial cable and capacitive types.
4.3.2
Technical Specification
PARAMETER
Frequency range:
Insertion Loss:
Coupling level:
Rejection:
Weight:
Connectors:
Temperature
operation:
range:
storage:
4.4
4.4.1
SPECIFICATION
350 – 550MHz
<0.3dB
-30dBc
N/A
<200gms
N type, female
-10°C to +60°C
-20°C to +70°C
¼Watt 0- -30dB Switched Attenuator (10-000701)
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.
4.4.2
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.
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4.5
Low Noise Amplifier (11-007402)
4.5.1
Description
The 30dB gain low noise amplifier used is a double stage solid-state low-noise amplifier.
Class A circuitry is used in the unit to ensure excellent linearity over a very wide dynamic
range. The two active devices are very moderately rated to provide a long trouble-free
working life. There are no adjustments on this amplifier, and in the unlikely event of
failure then the entire amplifier should be replaced. The amplifier features a dedicated, inbuilt alarm monitoring system which gives a TTL ‘open collector’ type switched signal on
alarm, this is then integrated using a built-in relay to give a volt-free contact for
summation into the main alarm system.
4.5.2
Technical Specification
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:
4.5.3
SPECIFICATION
380-500MHz
<140MHz
30-32dB
+22dBm (typical)
+34-35dBm (typical)
>20dB
<1.3dB
SMA female
300-330mA @ 24V DC
-10°C to +60°C
-20°C to +70°C
0.38kg
90 x 55 x 30.2 (case only)
LNA ‘D’ Connector Pin-out details
Connector pin
Signal
+Ve input (10-24V)
GND
Alarm Relay O/P bad
Alarm Relay common
Alarm Relay good
No connection
TTL voltage set
TTL alarm/0V (good)
O/C good/0V bad
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4.6
4.6.1
1Watt Low Power Amplifier (11-007901)
Description
This amplifier is dedicated to be a 1.0 W driver from 380 MHz to 470 MHz. It is a 2 stage
amplifier where each stage is in balanced configuration. It demonstrates very high linearity
and good input/output VSWR. There is a Current Fault Alarm Function, which indicates
failure of each one of the RF transistors by various alarm output options. The amplifier is
housed in an aluminium case (Alocrom 1200 finish) with SMA connectors for the RF
input/output and a 9way D-type connector for DC and alarm outputs.
4.6.2
Technical Specifications
PARAMETER
Frequency range:
Small signal gain:
Gain flatness:
Gain vs. temperature:
operational:
Temperature range:
storage:
Input/output return loss:
Maximum output power:
OIP3:
Supply voltage:
Current consumption:
Noise Figure:
SPECIFICATION
380-470MHz
37.5dB
±0.5dB
1.5dB
-10°C to +60°C
-20°C to +70°C
18dB
30.4dBm (@ 1dB comp. point)
43dBm
10-15V DC
780mA (typical)
<1.75dB
Two Channel 400MHz Cell Enhancer
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4.7
4.7.1
5Watt Medium Power Tetra Amplifier (12-021601)
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.
4.7.2
Technical Specification
PARAMETER
Frequency range:
Bandwidth:
Maximum RF output:
Gain:
1dB compression point:
3rd order intercept point:
VSWR:
Connectors:
Supply:
Weight:
operational:
Temperature range:
storage:
4.7.3
SPECIFICATION
380-470MHz (as required)
10-40MHz (typical, tuned to spec.)
>5Watts
>30dB
+37.5dBm
+50dBm
better than 1.5:1
SMA female
1.9Amps @ 12V DC
1kg (excluding heatsink)
-10°C to +60°C
-20°C to +70°C
PA 7-Way Connector Pin-outs
Connector Pin
A1 (large pin)
A2 (large pin)
Signal
+12V DC
GND
Alarm relay common
TTL alarm/0V good
Alarm relay contact (bad)
Alarm relay contact (good)
O/C good/0V bad (TTL)
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4.7.4
PA Connector (7) Pin-Outs
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4.8
4.8.1
Single DC/DC Converters (13-001704 & 13-001710)
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.
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.
4.8.2
Technical Specification
PARAMETER
SPECIFICATION
Operating Voltage: 21 – 27V DC
5.0V (13-001710)
Output Voltages:
9.0V (13-001704)
Output Current: 1.0A (maximum per o/p)
Connections: Screw Terminal Block
Temperature
operational: -10%C to +60%C
range:
storage: -20%C to +70%C
PCB Size: 47 x 30mm
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4.9
4.9.1
Controller/Monitor Board (17-005803)
Description
To meet the need for detailed control and status reporting of cell enhancers and other
systems installed in inaccessible locations, AFL has developed an optional RS232C
(RS232D) serial interface which may be incorporated into any of AFL’s range of cell
enhancers. The RS232 interface is designed primarily to be connected to a modem, which
can then communicate either via a fixed or a cellular telephone link with another modem at
the network control centre. As standard, the interface will control any modem that works
with the Hayes command set, although it can easily be adapted to control other equipment
if required.
The controller software has been written so that it is easily configured to meet specific
customer interface requirements. The standard software has two data formats. Firstly, a
verbose format that can be controlled from a simple terminal or terminal emulator.
Secondly, a terse data format intended to be used with front-end software running on
another computer to present a very user-friendly operator interface. If required, alternative
data formats can be provided to enable integration with existing customer front-end
software.
The RS232 interface board within the Cell Enhancer integrates all the alarm inputs from
the amplifier alarm boards, as well as from relays monitoring power supply status, door
open/closed status, I.F module status, and standby battery voltage status. Monitoring of
forward power can also be done. All this information is combined and formatted with onboard generated data including temperature, date, time and equipment serial number.
The RS232 interface board also controls the frequencies at which the channel modules
operate. These frequencies can, via a modem, be adjusted remotely. For more details, see
the RS232 interface board handbook (17-005801HBKM).
The PCB fitted here is a 12V version of the standard 24V board, (denoted by the ‘03’ at the
end of the AFL part number) – but all the electronic functions are identical.
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4.9.2
Drg. Nō. 17-005880, Controller/Monitor PCB Pin-Outs
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4.10
Channel Selective Modules (17-009304 & 17-009305)
4.10.1 Description
The channel selectivity module is employed when the Cell Enhancer requirement dictates that
very narrow bandwidths (single operating channels), must be selected from within the
operating passband. One channel selectivity module is required for each channel.
The Channel Selectivity Module is an Up/Down frequency converter that mixes the incoming
channel frequency with a synthesised local oscillator, so that it is down-converted to an
Intermediate Frequency (IF) in the upper HF range. An eight pole crystal filter in the IF
amplifier provides the required selectivity to define the operating passband of the Cell
Enhancer to a single PMR channel. The same local oscillator then converts the selected IF
signal back to the channel frequency.
Selectivity is obtained from a fixed bandwidth block filter operating at an intermediate
frequency (IF) in the low VHF range. This filter may be internal to the channel selectivity
module (Crystal or SAW filter) or an externally mounted bandpass filter, (LC or Helical
Resonator). Various IF bandwidths can therefore be accommodated. A synthesized Local
Oscillator is employed in conjunction with high performance frequency mixers, to translate
between the signal frequency and IF.
The operating frequency of each channel selectivity module is set by the programming of
channel selectivity module frequencies and is achieved digitally, via hard wired links, banks
of DIP switches, or via an onboard RS232 control module, providing the ability to remotely
set channel frequencies.
Automatic Level Control (ALC) is provided within each channel selectivity module such that
the output level is held constant for high level input signals. This feature prevents saturation
of the output mixer and of the associated amplifiers.
Alarms within the module inhibit the channel if the synthesised frequency is not locked. The
synthesiser will not usually go out of lock unless a frequency far out of band is programmed.
The channel selectivity module is extremely complex and, with the exception of channel
frequency programming within the design bandwidth, it cannot be adjusted or repaired
without extensive laboratory facilities and the necessary specialised personnel. If a fault is
suspected with any channel selectivity module it should be tested by substitution and the
complete, suspect module should then be returned to AFL for investigation.
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4.10.2 Drg. Nō. 17-003080, Generic Channel Module Block Diagram
Two Channel 400MHz Cell Enhancer
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4.11
12V Single Relay Board (80-008901)
4.11.1 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.
4.12
PP9 NiCad Backup Battery (96-000017)
The NiCad rechargeable battery fitted in this system is trickle-charged from the main 12V
supply by a diode and resistor and powers the RS232 controller/monitor board and the
telephone line modem in the case of a power failure. This gives the controller and modem
sufficient time to dial out and alert the control centre of the new (failure) status of the
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4.13
15V Switch-Mode PSU (96-300054)
4.13.1 Description
The power supply unit is a switched-mode type capable of supplying 15V DC at 27Amps
continuously. The amplifiers in this unit will draw approximately 12-15Amps at 15V 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 15.2V. The adjustment potentiometer will be found close to the DC output
terminals.
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.
4.13.2 Technical Specification
AC Input Supply:
110 or 220V nominal
Voltage: 90 to 132 or 180 to 264V
(absolute limits)
Frequency: 47 to 63Hz
DC Output Supply:
15V DC (nominal)
Voltage:
12-17V (absolute limits)
Current: 27.0A
4.14
MT2834ZDXK 56kBPS Modem (96-800003)
4.14.1 Description
The modem used is a standard, 56kBPS, O.E.M, ‘Hayes instruction set’ unit. Used in
conjunction with the Controller/Monitor board it is the output termination of all the alarm
system data which is then transmitted into the regular telephone network by standard dial up.
More information on the set-up & use of the modem can be found in the Controller/Monitor
Handbook (17-005801HBKM).
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5.
INSTALLATION
5.1
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.
5.2
Antenna Installation & Gain Calculations
1 Most Cell Enhancer require two antennas, one a highly directional Yagi or similar
directed towards the donor cell base station, and one a leaky feeder, omni-directional antenna
or Yagi to cover the area in which the mobiles are to be served.
2 The maximum gain at which the Cell Enhancer can be set is limited by the isolation that
can be achieved between these two antennas. Therefore when the antennas have been
installed, inject a signal (at a known power level) into one of them and measure the signal
level received by the other antenna on a spectrum analyser. The isolation can then be
calculated as the difference between these two figures. The gain in each path of the Cell
Enhancer should be set at least 10 dB below this figure, using attenuators as described below
in paragraph 5.
3 Also measure the received signal from the donor cell at the input to the Cell Enhancer
(base port). The gain of the Cell Enhancer downlink path should be set such the donor site
will not overload the Cell Enhancer amplifiers. It is recommended that the input level should
be less than -50dBm at the input of the Cell Enhancer (Base Port). (This figure is assuming
maximum gain, and may be increased by the value of the attenuator fitted in the downlink
path.)
4 Ensure that the mobile facing antenna has at least 70 dB isolation from the nearest mobile.
(This is usually easily achieved when using a leaky feeder.)
5 The Cell Enhancer gain is set by setting the attenuation in each path (uplink and
downlink) between the first two amplifier stages (see markings within the Cell Enhancer or
layout drawings for the exact attenuator locations). Note that the uplink (mobile to base) and
downlink (base to mobile) path gains are set independently. This allows the paths to have
different gains if required to set the correct output power levels.
6 It is recommended that the gains are set such that the Downlink channel output levels
from the Cell Enhancer are typically +30dBm per channel
(Input level + Gain = Output level).
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5.3
A).
Antenna Isolation
First set up the two antennas & measure the isolation between them.
Yagi
Yagi or leaky feeder
Measure Isolation
Between antennas
Mobiles
Base Site
B) Install the Cell Enhancer with its gain set 10dB below the isolation
figure obtained above.
Yagi
Yagi or leaky feeder
Base Port
Mobile Port
Cell Enhancer
Base Site (donor)
Mobile
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5.4
General Remarks
The size and weight of the wall-mount case is such that 2/3 persons may be needed to lift the
equipment into position. Test the mechanical installation in the interests of safety, before any
electrical, RF, or optical connections are made.
The equipment must be located on a smooth, flat, perpendicular surface, sheltered if possible,
that is made from a material suitable for bearing the weight of the enclosure, (brick or
concrete is recommended). If the installer is in any doubt about the suitability of a site it is
advised that he/she consult with an appropriately qualified Structural Engineer.
It is also important in determining the location of the case that space is allowed for access to
the front, sides and beneath the equipment to enable maintenance work to be carried out. The
door must be able to fully open but not to obstruct other equipment when doing so.
The location should ideally be served with steel conduits to carry all the cables to and from
the case.
5.5
Electrical Connections
The mains power supply is connected to the IP65 connector located on the bottom/side
surface of the case. It is recommended that the connection is made by a qualified electrician,
who must satisfy himself that the supply will be the correct voltage and of sufficient
capacity.
All electrical and RF connections should be completed and checked prior to power being
applied for the first time.
5.6
RF Connections
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, damage to the equipment will be done if the base station transmitter is then keyed.
Ensure that connections are kept clean and are fully tightened.
5.7
RS232 Setup
The RS232 controller/monitor should not need setting up as the specified configuration
will have been fully tested before it leaves the factory.
Further information on the controller board’s setup and remote capabilities is available in
the RS232 Controller/Monitor Handbook, AFL Nō. 17-005801HBKM.
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6.
MAINTENANCE
6.1
6.1.1
General Procedures
Quick Fault Checklist
All AFL equipment is individually tested to specification prior to despatch. Failure of this
type of equipment is not common. Experience has shown that a large number of fault
conditions relating to new equipment have simple causes often occurring as a result of
transportation, unpacking and installation. Below are listed some common problems which
have resulted in poor performance or an indicated non-functioning of the equipment.
•
•
•
•
•
•
•
•
•
•
Mains power not connected or not switched on.
External connectors not fitted or incorrectly fitted.
Internal connectors/ports becoming loose due to transport vibration.
Wiring becoming detached as a result of heavy handling.
Input signals not present due to faults in the aerial and feeder system.
Base transmissions not present due to faults at the base station.
Modems fitted with incorrect software configuration/and or PIN Nō’s.
Changes to channel frequencies and inhibiting channels.
Hand held radio equipment not correctly set to repeater channels.
Hand held radio equipment not correctly set to base station.
6.1.2
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 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 Coverage Enhancement Management System, if fitted), or locally
with the front door LED’s. The green LED should be illuminated, while the red alarm
indicator should be off. If the alarm LED is on, then the amplifier (or any other alarmed
device connected to the summary output) that is causing the fault will have to be isolated and
individually tested against the original test specification. The individual amplifier modules
have a green LED showing through a hole in their lid/cover, which is illuminated if the unit
is working correctly, and extinguished if not.
If an amplifier is suspect, check the DC power supply to the unit. If no other fault is apparent
use a spectrum analyser to measure the incoming signal level at the input and then after
reconnecting the amplifier input, measure the output level. Consult with the system diagram
to determine the expected gain and compare result.
In the event that there are no alarms on and all units appear to be functioning it will be
necessary to test the system in a systematic manner to confirm correct operation.
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6.1.3
Downlink
Confirm that there is a signal at the expected frequency and strength from the base station. If
this is not present then the fault may lay outside the system. To confirm this, inject a
downlink frequency signal from a known source at the master site BTS input and check for
output at the remote site feeder output.
If a signal is not received at the output it will be necessary to follow the downlink path
through the system to find a point at which the signal is lost. The expected downlink output
for the given input can be found in the end-to-end test specification.
6.1.4
Uplink
Testing the uplink involves a similar procedure to the downlink except that the frequencies
used are those transmitted by the mobile equipment.
6.1.5
Fault repair
Once a faulty component has been identified, a decision must be made on the appropriate
course to carry out a repair. A competent engineer can quickly remedy typical faults such as
faulty connections or cables. The exceptions to this are cable assemblies connecting
bandpass filter assemblies that are manufactured to critical lengths to maintain a 50-ohm
system. Care should be taken when replacing cables or connectors to ensure that items are of
the correct specification. The repair of component modules such as amplifiers and bandpass
filters will not usually be possible in the field, as they frequently require specialist
knowledge and test equipment to ensure correct operation. It is recommended that items of
this type are replaced with a spare unit and the faulty unit returned to AFL for repair.
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6.1.6
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.
6.1.7
Service Support
Advice and assistance with maintaining and servicing this system are available by contacting
Aerial Facilities Ltd.
6.2
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.
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6.3
6.3.1
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.
6.3.2
Module Removal (LNA’s, general procedure):
The following general instructions 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).
6.3.3
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.
6.3.4
Power Amplifiers
1) Remove power to the unit. (Switch off @ mains/battery, or remove DC/alarm ‘D’ type
connector)
2) Remove alarm wires from alarm screw terminal block or disconnect multi-way alarm
connector.
3) Carefully disconnect the RF input and output coaxial connectors (usually SMA)
If alarm board removal is not required, go to step 5.
4) There is (usually) a plate attached to the alarm board which fixes it to the amplifier,
remove its retaining screws and the alarm board can be withdrawn from the amplifier in
its entirety. On certain types of amplifier the alarm board is not mounted on a dedicated
mounting plate; in this case it will have to firstly be removed by unscrewing it from the
mounting pillars, in most cases, the pillars will not have not have to be removed before
lifting the amplifier.
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5) If the amplifier to be removed has a heatsink attached, there may be several different ways
it can have been assembled. The most commonly used method, is screws through the fins
of the heatsink to threaded screw holes (or nuts and bolts), into the amplifier within the
main case (side & top mounting). If the heatsink is mounted on the rear of the main case
(this is very unusual), 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.
6.3.5
Low Power Amplifier Replacement
Isolate the mains power supply and disconnect the 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
6.3.6
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.
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-38 of 39
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
dBm
dB
dBm
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
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
Two Channel 400MHz Cell Enhancer
User Handbook
Handbook Nō.-50-128501HBK
Issue No:-A
Date:-12/08/2005
Page:-39 of 39

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