PBE Europe as Axell Wireless 60-2323SERIES VISIO REPEATER 60-232301 User Manual manual

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Dual Band Fibre Fed BDA
User Handbook
For
General Dynamics Information Technology Inc.
AWL Works Order Q119830
AWL Product Part No. 60-232301
Axell Wireless UK
Aerial House
Asheridge Road
Chesham, Buckinghamshire
HP5 2QD, United Kingdom
Tel: + 44 (0) 1494 777000
Fax: + 44 (0) 1494 777002
info@axellwireless.com
www.axellwireless.com
Axell Wireless Sweden
Box 7139
174 07 Sundbyberg
Sweden
Tel: + 46 (0) 8 475 4700
Fax: + 46 (0) 8 475 4799
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 1 of 35
Table of Contents
1.
Introduction................................................................................................................................ 3
1.1.
Scope and Purpose of Document ........................................................................................ 3
1.2.
Limitation of Liability Notice.................................................................................................. 3
2.
Safety Considerations................................................................................................................ 4
2.1.
Earthing of Equipment ......................................................................................................... 4
2.2.
Electric Shock Hazard.......................................................................................................... 4
2.3.
RF Radiation Hazard ........................................................................................................... 4
2.4.
Lifting and other Health and Safety Recommendations........................................................ 4
2.5.
Chemical Hazard ................................................................................................................. 5
2.6.
Laser Safety ........................................................................................................................ 5
2.7.
Emergency Contact Numbers .............................................................................................. 5
3.
Dual Band Fibre Fed BDA 60-232301 ....................................................................................... 6
3.1.
60-232301 Specification .................................................................................................... 11
3.2.
60-232301 List of Major Sub-Components ......................................................................... 12
3.3.
60-232301 System Diagram .............................................................................................. 13
3.4.
60-232301 Front View........................................................................................................ 14
3.5.
60-232301 Side Views ....................................................................................................... 15
3.6.
60-232301 Interior Views ................................................................................................... 16
3.6.1. Interior View Showing Optical Connectors ..................................................................... 16
3.6.2. Interior View Showing UHF Downlink Path..................................................................... 17
3.6.3. Interior View Showing 800MHz Downlink Path ............................................................... 18
3.6.4. Interior View Showing UHF Uplink Path ......................................................................... 19
3.6.5. Interior View Showing 800MHz Uplink Path ................................................................... 20
3.6.6. Interior View Showing DC and Alarm Modules ............................................................... 21
4.
Installation – General Notes..................................................................................................... 23
4.1.
General Remarks............................................................................................................... 23
4.2.
Electrical Connections ....................................................................................................... 23
4.3.
RF Connections ................................................................................................................. 23
4.4.
Optical Connections ........................................................................................................... 23
4.5.
Commissioning .................................................................................................................. 24
5.
Maintenance – General Notes ................................................................................................. 25
5.1.
Fault Finding ...................................................................................................................... 25
5.1.1. Quick Fault Checklist ..................................................................................................... 25
5.1.2
Fault Isolation ................................................................................................................ 25
5.1.3
Downlink ........................................................................................................................ 26
5.1.4
Uplink ............................................................................................................................. 26
5.1.5
Checking service............................................................................................................ 26
5.1.6
Fault repair..................................................................................................................... 26
5.1.7
Service Support ............................................................................................................. 26
5.2
Tools & Test Equipment..................................................................................................... 27
5.3.
Care of Modules ................................................................................................................ 27
5.3.1. General Comments ........................................................................................................ 27
5.3.2. LNA Replacement (general procedure) .......................................................................... 27
5.3.3. Module Replacement (general procedure) ..................................................................... 27
5.3.4. Power Amplifiers Replacement (general procedure) ...................................................... 28
5.3.5. Low Power Amplifier Replacement (general procedure)................................................. 28
5.3.6. Module Transportation ................................................................................................... 29
Appendix A........................................................................................................................................ 30
A.1.
Glossary of Terms used in this document .......................................................................... 30
A.2.
Key to Drawing Symbols used in this document................................................................. 31
A.3.
EC Declaration of Conformity............................................................................................. 32
A.4.
Waste Electrical and Electronic Equipment (WEEE) Notice ............................................... 33
A.5.
Document Amendment Record .......................................................................................... 34
Appendix B........................................................................................................................................ 35
B.1
Initial Equipment Set-Up Calculations ................................................................................ 35
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 2 of 35
1.
Introduction
1.1.
Scope and Purpose of Document
This handbook is for use solely with the equipment identified by the Axell Wireless Limited (AWL) Part
Number shown on the front page. It is not to be used with any other equipment unless specifically
authorised by AWL. This is a controlled release document and, as such, becomes a part of the Axell
Wireless Total Quality Management System. Alterations and modification may therefore only be
performed by Axell Wireless.
AWL recommends that the installer of this equipment familiarise themselves with the safety and
installation procedures contained within this document before installation commences.
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 AWL, normally at the company’s repair facility in Chesham, England.
This handbook has been prepared in accordance with BS 4884, and AWL’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 Operations Support Director (see section 2.7.).
This document fulfils the relevant requirements of Article 6 of the R&TTE Directive.
1.2.
Limitation of Liability Notice
This manual is written for the use of technically competent operators/service persons. No liability is
accepted by AWL 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, AWL does not warrant the absolute accuracy of the information contained within this
manual, or its completeness, fitness for purpose, or scope.
AWL 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.
Unless specified otherwise, all AWL 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.
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 3 of 35
2.
Safety Considerations
2.1.
Earthing of Equipment
Equipment 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.
2.2.
Electric Shock Hazard
The risk of electrical shocks due to faulty mains driven power supplies whilst
potentially ever present in any electrical equipment, would be minimised by adherence
to good installation practice and thorough testing at the following stages:
a)
Original assembly.
b)
Commissioning.
c)
Regular intervals, thereafter.
All test equipment must 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.
2.3.
RF Radiation Hazard
RF radiation, (especially at UHF frequencies) arising from transmitter outputs
connected to AWL’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 un-terminated. 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
compromise 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.
2.4.
Lifting and other Health and Safety Recommendations
Certain items of AWL equipment are heavy and care should be taken when lifting
them by hand. Ensure that a suitable number of personnel, appropriate lifting
apparatus and appropriate personal protective equipment is used especially when
installing Equipment above ground e.g. on a mast or pole and manual handling
precautions relevant to items of the weight of the equipment being worked on must be
observed at all times when handling, installing or dismounting this equipment.
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 4 of 35
2.5.
Chemical Hazard
Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes
used in devices within equipment produced by Axell Wireless 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 Axell Wireless Ltd. for
disposal.
To return such equipment, please contact the Operations Support 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 AWL 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.
2.6.
Laser Safety
General good working practices adapted from
EN60825-2: 2004/ EC 60825-2:2004
Do not stare with unprotected eyes or with any unapproved optical device at the fibre
ends or connector faces or point them at other people, Use only approved filtered or
attenuating viewing aids.
Any single or multiple fibre end or ends found not to be terminated (for example, matched, spliced)
shall be individually or collectively covered when not being worked on. They shall not be readily
visible and sharp ends shall not be exposed.
When using test cords, the optical power source shall be the last connected and the first
disconnected; use only approved methods for cleaning and preparing optical fibers and optical
connectors.
Always keep optical connectors covered to avoid physical damage and do not allow any dirt/foreign
material ingress on the optical connector bulkheads.
The optical fibre jumper cable minimum bend radius is 3cm; bending to a smaller radius may result in
optical cable breakage and excessive transmission losses.
Caution: The FO units are NOT weather proof.
2.7.
Emergency Contact Numbers
The AWL Operations Support Department can be contacted on:
Telephone
+44 (0)1494 777000
Fax.
+44 (0)1494 777002
e-mail
qa@axellwireless.com
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 5 of 35
3.
Dual Band Fibre Fed BDA 60-232301
Dual Band Fibre Fed BDA 60-232301 is built into a wall-mounted, environmentally protected (IP65)
aluminium alloy case; RF ports and connectors are also IP65 standard making the entire enclosure
and connecting ports weatherproof. Handles are provided for carrying the unit and the door is fitted
with locks. A supply isolator switch is fitted inside the unit and there are Power On and Alarm
indicators on the outside of the door.
The BDA is used to filter and amplify the signal levels of two (UHF and 800MHz) Downlink and Uplink
frequency bands; one RF port connects to a Distributed Antenna System facing the mobile units and
four Optical Ports (primary and secondary D/L and primary and secondary U/L) receive Optical
signals from (Downlink) and transmit optical signals to (Uplink) the Master Site.
DOWNLINK
Primary F/O D/L feed from
Master Site
60-232301
Secondary F/O D/L feed from
Master Site
Primary F/O U/L feed to
Master Site
RF D/L O/P to and
U/L I/P from DAS
Secondary F/O U/L feed to
Master Site
Simplified System Sketch
UPLINK
Downlink
Downlink signals are received from the Master Site as Optical signals via Fibre Optic cables which
enter the case of the BDA at the cable gland annotated “A” in section 3.5. There are two Downlink
optical cables, a primary link and a secondary (redundant) link. The primary Downlink optical cable
connects to the BDA at the SC/APC optical port annotated “B” in section 3.6.1.; the optical signal is
demodulated to RF by the F/O Transceiver Module J1361001 annotated “A” in section 3.6.1. and the
resultant RF Downlink signal passes into RF Relay Assembly 20-001507.
The secondary Downlink optical cable connects to the BDA at the SC/APC optical port annotated “C”
in section 3.6.1.; the optical signal is demodulated to RF by the F/O Transceiver Module J1361001
annotated “D” in section 3.6.1. and the resultant RF Downlink signal also passes into RF Relay
Assembly 20-001507 which is normally set to pass the primary signal but if the primary signal strength
falls below a pre-set level then the RF relay switches to the secondary Downlink path. After leaving
the RF relay the Downlink signal passes through an AGC Detector Module 17-019802 which monitors
the strength of the RF signals entering the RF relay and if the primary signal falls below its pre-set
threshold then the AGC Detector switches the RF relay to pass the secondary Downlink signal path.
The Downlink signal then passes through a Crossband Coupler 07-004814 (annotated “G” in sections
3.6.2. & 3.6.3.) which splits the UHF band signal from the 800MHz band signal.
UHF Downlink
The UHF branch then passes through a bandpass filter 02-010501(annotated “H” in section 3.6.2.)
which is tuned to pass the UHF Downlink passband and to reject out-of-band noise and then passes
through Variable Switched Attenuator 10-000901 (annotated “I” in section 3.6.2.) which can provide
up to 15dB of attenuation in 1dB steps if required, the attenuation is controlled by a set of four toggle
switches on the body of the attenuator; each switch is clearly marked with the attenuation it provides,
and the total attenuation in-line is the sum of the values switched in.
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 6 of 35
After leaving the attenuator the UHF Downlink passes through AGC Attenuator Module 17-016401
(annotated “J” in section 3.6.2.) which is controlled by UHF Downlink AGC Detector Module 17019802 and is capable of providing up to 15dB of signal attenuation.
The UHF Downlink then passes through two stages of amplification; the first stage is composed of
two Low Noise Amplifiers 11-007402, arranged in parallel (each providing 30dB of signal gain). The
signal is split into two equal paths by a 3dB Splitter/Combiner 05-002603 (annotated “K” in section
3.6.2.) and each path passes through one of the LNAs (annotated “L” and “M” in section 3.6.2.) before
being recombined by a second 2 way splitter/combiner 05-002603 (annotated “N” in section 3.6.2.).
The second stage is composed of two 5W Power Amplifiers 12-021601 arranged in parallel (each
providing 30dB of signal gain). The signal is split into two equal paths by a 3dB Splitter/Combiner 05002603 (annotated “O” in section 3.6.2.) and each path passes through one of the PAs (annotated “P”
and “Q” in section 3.6.2.) before being recombined by a second 2 way splitter/combiner 05-002603
(annotated “R” in section 3.6.2.).
After leaving the Power Amplifiers the UHF Downlink signal path passes through an AGC Detector
Module 17-019801 (annotated “S” in section 3.6.2.) which regulates the gain level by adjusting AGC
Attenuator Module 17-016401; The AGC Detector module 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
AGC Attenuator Module to limit the RF output to the (factory set) threshold. Therefore overloading of
the power amplifier is avoided.
After leaving the AGC Detector Module the UHF Downlink passes through the Downlink path of
Bandpass Duplexer Module 16-041402 (annotated “T” in section 3.6.2.) to further reject out-of-band
noise. Upon leaving the Duplexer module the UHF Downlink signal passes into a second Crossband
Coupler 07-004814 (annotated “U” in sections 3.6.2. & 3.6.3.) which combines the UHF Downlink with
the 800MHz band Downlink path and the combined signal exits the BDA for the DAS via the N type
port labelled “ANT. FACING MOBILES” (annotated “B” in section 3.5.)
800MHz Downlink
After passing through Crossband Coupler 07-004814 (annotated “G” in sections 3.6.2. & 3.6.3.) the
800MHz branch then passes through a bandpass filter 02-007201 (annotated “H” in section 3.6.3.)
which is tuned to pass the 800MHz Downlink passband and to reject out-of-band noise and then
passes through Variable Switched Attenuator 10-000901 (annotated “I” in section 3.6.3.) which can
provide up to 15dB of attenuation in 1dB steps if required, the attenuation is controlled by a set of four
toggle switches on the body of the attenuator; each switch is clearly marked with the attenuation it
provides, and the total attenuation in-line is the sum of the values switched in.
After leaving the attenuator the 800MHz Downlink passes through AGC Attenuator Module 17-016401
(annotated “J” in section 3.6.3.) which is controlled by 800MHz Downlink AGC Detector Module 17019802 and is capable of providing up to 15dB of signal attenuation.
The 800MHz Downlink then passes through two stages of amplification; the first stage is composed of
two Low Noise Amplifiers 11-006702, arranged in parallel (each providing 30dB of signal gain). The
signal is split into two equal paths by a 3dB Splitter/Combiner 05-002602 (annotated “K” in section
3.6.3.) and each path passes through one of the LNAs (annotated “L” and “M” in section 3.6.3.) before
being recombined by a second 2 way splitter/combiner 05-002602 (annotated “N” in section 3.6.3.).
The second stage is composed of two 20W Power Amplifiers 12-023301 arranged in parallel (each
providing 37dB of signal gain). The signal is split into two equal paths by a 3dB Splitter/Combiner 05002602 (annotated “O” in section 3.6.3.) and each path passes through one of the PAs (annotated “P”
and “Q” in section 3.6.3.) before being recombined by a second 2 way splitter/combiner 05-002602
(annotated “R” in section 3.6.3.).
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 7 of 35
After leaving the Power Amplifiers the 800MHz Downlink signal path passes through an AGC
Detector Module 17-019801 (annotated “S” in section 3.6.3.) which regulates the gain level by
adjusting AGC Attenuator Module 17-016401; The AGC Detector module 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 AGC Attenuator Module to limit the RF output to the (factory set) threshold. Therefore
overloading of the power amplifier is avoided.
After leaving the AGC Detector Module the 800MHz Downlink passes through a second bandpass
filter 02-007201 (annotated “T” in section 3.6.3.) which is tuned to pass the 800MHz Downlink
passband and to further reject out-of-band noise. Upon leaving the Bandpass Filter 800MHz Downlink
signal passes into a second Crossband Coupler 07-004814 (annotated “U” in sections 3.6.2. & 3.6.3.)
which combines the 800MHz Downlink with the UHF band Downlink path and the combined signal
exits the BDA for the DAS via the N type port labelled “ANT. FACING MOBILES” (annotated “B” in
section 3.5.)
Uplink
Uplink signals are received from the DAS and enter the case of the BDA at the N type port labelled
“ANT. FACING MOBILES” (annotated “B” in section 3.5.).
The Uplink signal then passes through a Crossband Coupler 07-004814 (annotated “B” in sections
3.6.4. & 3.6.5.) which splits the UHF band signal from the 800MHz band signal.
UHF Uplink
The UHF branch then passes through the Uplink path of Bandpass Duplexer Module 16-041402
(annotated “C” in section 3.6.4.) which is tuned to pass the UHF Uplink passband and to reject out-ofband noise and then passes through the first of two amplification stages.
The first stage is composed of two Low Noise Amplifiers 11-007402, arranged in parallel (each
providing 30dB of signal gain). The signal is split into two equal paths by a 3dB Splitter/Combiner 05002603 (annotated “D” in section 3.6.4.) and each path passes through one of the LNAs (annotated
“E” and “F” in section 3.6.4.) before being recombined by a second 2 way splitter/combiner 05-002603
(annotated “G” in section 3.6.4.).
The UHF Uplink then passes through Variable Switched Attenuator 10-000701 (annotated “H” in
section 3.6.4.) which can provide up to 30dB of attenuation in 1dB steps if required, the attenuation is
controlled by a set of four toggle switches on the body of the attenuator; each switch is clearly marked
with the attenuation it provides, and the total attenuation in-line is the sum of the values switched in.
After leaving the attenuator the UHF Uplink passes through AGC Attenuator Module 17-016401
(annotated “I” in section 3.6.4.) which is controlled by UHF Uplink AGC Detector Module 17-019802
and is capable of providing up to 15dB of signal attenuation.
The UHF Uplink then passes through a Bandpass Filter 02-010501 to further reject out-of-band noise
and then through the second stage of amplification, the second stage is composed of two 1W Low
Power Amplifiers 12-030301 arranged in parallel (each providing 33dB of signal gain). The signal is
split into two equal paths by a 3dB Splitter/Combiner 05-002603 (annotated “K” in section 3.6.4.) and
each path passes through one of the PAs (annotated “L” and “M” in section 3.6.4.) before being
recombined by a second 2 way splitter/combiner 05-002603 (annotated “N” in section 3.6.4.).
After leaving the Low Power Amplifiers the UHF Uplink signal path passes through an AGC Detector
Module 17-019802 (annotated “O” in section 3.6.4.) which regulates the gain level by adjusting AGC
Attenuator Module 17-016401; The AGC Detector module 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
AGC Attenuator Module to limit the RF output to the (factory set) threshold. Therefore overloading of
the power amplifier is avoided.
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 8 of 35
After leaving the AGC Detector Module the UHF Uplink passes through a second Crossband Coupler
07-004814 (annotated “P” in sections 3.6.4. & 3.6.5.) which combines the UHF Uplink with the
800MHz band Uplink path; the combined signal then passes through a 3dB Splitter/Combiner 05002901 (annotated “Q” in sections 3.6.4. & 3.6.5.) which splits the combined Uplink signal into two
equal paths.
One path is fed to the F/O Transceiver Module J1361001 (annotated “R” in sections 3.6.4. & 3.6.5.)
for the primary optical link. The F/O Transceiver Module modulates the RF signal onto a laser and the
primary optical uplink exits the BDA for the master site via the SC/APC optical port annotated “T” in
sections 3.6.4. & 3.6.5.
The second branch of the Uplink path is fed to the F/O Transceiver Module J1361001 (annotated “S”
in sections 3.6.4. & 3.6.5.) for the secondary optical link. The F/O Transceiver Module modulates the
RF signal onto a laser and the secondary optical uplink exits the BDA for the master site via the
SC/APC optical port annotated “U” in sections 3.6.4. & 3.6.5.
800MHz Uplink
After passing through Crossband Coupler 07-004814 (annotated “B” in sections 3.6.4. & 3.6.5.) the
800MHz branch then passes through Bandpass filter 02-007201 (annotated “C” in section 3.6.5.)
which is tuned to pass the 800MHz band Uplink passband and to reject out-of-band noise and then
passes through the first of two amplification stages.
The first stage is composed of two Low Noise Amplifiers 11-006702, arranged in parallel (each
providing 30dB of signal gain). The signal is split into two equal paths by a 3dB Splitter/Combiner 05002602 (annotated “D” in section 3.6.5.) and each path passes through one of the LNAs (annotated
“E” and “F” in section 3.6.5.) before being recombined by a second 2 way splitter/combiner 05-002602
(annotated “G” in section 3.6.5.).
The 800MHz Uplink then passes through Variable Switched Attenuator 10-000701 (annotated “H” in
section 3.6.5.) which can provide up to 30dB of attenuation in 1dB steps if required, the attenuation is
controlled by a set of four toggle switches on the body of the attenuator; each switch is clearly marked
with the attenuation it provides, and the total attenuation in-line is the sum of the values switched in.
After leaving the attenuator the 800MHz Uplink passes through AGC Attenuator Module 17-016401
(annotated “I” in section 3.6.5.) which is controlled by UHF Uplink AGC Detector Module 17-019802
and is capable of providing up to 15dB of signal attenuation.
The 800MHz Uplink then passes through a second Bandpass Filter 02-007201 to further reject out-ofband noise and then through the second stage of amplification, the second stage is composed of two
1W Low Power Amplifiers 12-030302 arranged in parallel (each providing 30dB of signal gain). The
signal is split into two equal paths by a 3dB Splitter/Combiner 05-002602 (annotated “K” in section
3.6.5.) and each path passes through one of the PAs (annotated “L” and “M” in section 3.6.5.) before
being recombined by a second 2 way splitter/combiner 05-002602 (annotated “N” in section 3.6.5.).
After leaving the Low Power Amplifiers the 800MHz Uplink signal path passes through an AGC
Detector Module 17-019802 (annotated “O” in section 3.6.5.) which regulates the gain level by
adjusting AGC Attenuator Module 17-016401; The AGC Detector module 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 AGC Attenuator Module to limit the RF output to the (factory set) threshold. Therefore
overloading of the power amplifier is avoided.
After leaving the AGC Detector Module the 800MHz Uplink passes through a second Crossband
Coupler 07-004814 (annotated “P” in sections 3.6.4. & 3.6.5.) which combines the 800MHz Uplink
with the UHF band Uplink path; the combined signal then passes through a 3dB Splitter/Combiner 05002901 (annotated “Q” in sections 3.6.4. & 3.6.5.) which splits the combined Uplink signal into two
equal paths.
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Technical Literature
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Date 22/12/2009
Page 9 of 35
One path is fed to the F/O Transceiver Module J1361001 (annotated “R” in sections 3.6.4. & 3.6.5.)
for the primary optical link. The F/O Transceiver Module modulates the RF signal onto a laser and the
primary optical uplink exits the BDA for the master site via the SC/APC optical port annotated “T” in
sections 3.6.4. & 3.6.5.
The second branch of the Uplink path is fed to the F/O Transceiver Module J1361001 (annotated “S”
in sections 3.6.4. & 3.6.5.) for the secondary optical link. The F/O Transceiver Module modulates the
RF signal onto a laser and the secondary optical uplink exits the BDA for the master site via the
SC/APC optical port annotated “U” in sections 3.6.4. & 3.6.5.
Dual Band Fibre Fed BDA 60-232301 is powered by an AC input of 115V which drives a pair of
identical 600Watt PSU modules connected via power combining diodes in a dual redundant
configuration to provide a 24V DC supply which in turn is used to feed a pair of DC/DC convertors the
12V outputs of which are similarly combined via diodes. The 12V DC supply is then further modified
by a multi-voltage converter to provide a range of DC voltages to power the active modules within the
BDA
A comprehensive alarm system is fitted; all the amplifier, fibre optic and PSU modules carry their own
voltage-free contact alarm relay outputs which are fed to and collated by a control PCB, the Generic
Interface Board Assembly 17-020001 (annotated “L” in section 3.6.6.); from here alarm data is fed to
the F/O Transceiver Modules and modulated onto the Uplink optical signal to be demodulated at the
BTS. A summary alarm output is also present at the terminal block (terminals 7 & 8) (annotated “L” in
section 3.6.1.) on the front face of the External Alarm and Battery Module J1161030 (annotated “K” in
section 3.6.1.) The summary output is then fed to the 6 pole panel plug labelled “ALARM” (annotated
“D” in section 3.5.) on the side of the case.
Two ports are provided where an operator may connect into the system using a laptop PC running
suitable terminal-emulation software to interrogate the control PCB to gain access to alarm
information and to configure the equipment. A local serial port, (a 9 way “D” panel socket annotated
“J” in section 3.6.1.) and an RJ45 Ethernet port (annotated “I” in section 3.6.1.)
Control data from the BTS for the AGC system are modulated onto the optical Downlink signal and
demodulated by the F/O Transceiver Modules to be fed to the control PCB.
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Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 10 of 35
3.1.
60-232301 Specification
PARAMETER
Optical Downlink
Optical Input Alarm Threshold
RF Downlink
UHF
Passband
Frequency
800MHz
Passband Gain
Passband Ripple
Switch Attenuator
UHF
1dB Compression
800MHz
UHF
OIP3
800MHz
ALC setting
In Band Spurious Noise (30kHz B/W)
RF Uplink
UHF
Passband
Frequency
800MHz
Passband Gain
Passband Ripple
Switch Attenuator
1dB Compression
ALC Setting
OIP3
Noise Figure
In Band Spurious Noise (30kHz B/W)
Optical Uplink
F/O TX Output Power
General
Case Size
Case Material
Case Finish
AC Supply Voltage
RF Connectors
Optical Connectors
Alarms Fitted
Temperature
Range
operation
storage
Humidity
SPECIFICATION
< -9dBm at 1310nm
380-385 MHz
851-869 MHz
50dB
<±1.5 dB
0dB to 15dB (± 1dB) in 1dB steps
+38dBm
+45dBm
+50dBm
+63dBm
2dB below compression
< -13dBm @ (Max gain)
390-395 MHz
806-824 MHz
>50 dB
<±1.5 dB
0dB to 30dB (± 1dB) in 2dB steps
+30dB
0dBm (FCC -13dBm 3 Carriers)
+40dBm
<5dB (max. gain)
< -13dBm @ (Max gain)
> 0dBm at 1550nm
909mm x 780mm x 275mm
Aluminium Alloy (2mm)
Light Grey RAL7035 Semi-gloss
110V to 240V
N type female
SC/APC
UHF Downlink
UHF Uplink
800MHz Downlink
800MHz Uplink
F/O RX
F/O TX
-20°C to +60°C
-40°C to +70°C
95% RHNC
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3.2.
60-232301 List of Major Sub-Components
Component
Part
02-007201
02-010501
05-002602
05-002603
05-002901
07-004814
10-000701
10-000901
11-006702
11-007402
12-021601
12-023301
12-030301
12-030302
13-003301
16-041402
17-016401
17-019801
17-019802
17-020001
17-020602
20-001507
80-008901
90-850327
94-100004
96-300067
96-900037
H561003
J1161030
J1361001
J1421001
Part Description
Bandpass Filter
Bandpass Filter
3dB Splitter/Combiner
3dB Splitter/Combiner
3dB Splitter/Combiner
Crossband Coupler 500/800MHz
Variable Switched Attenuator 0-30dB
Variable Switched Attenuator 0-15dB
Low Noise Amplifier 30dB
Low Noise Amplifier 30dB
5W Power Amplifier
20W Power Amplifier
1W Low Power Amplifier 33dB
1W Low Power Amplifier 30dB
Mains Filter Assembly
Bandpass Duplexer Module
AGC Attenuator Module
AGC Detector Module (+10 to+50dBm)
AGC Detector Module (-30 to+10dBm)
Generic Interface Board Assembly
Communications Board Module
RF Relay Assembly
12V Relay PCB Assembly
DC/DC Converter
Dual Diode Assembly
600W PSU Module
AC Trip Switch
Control Module
External Alarm and Battery Module
F/O Transceiver Module
Multi-Voltage DC/DC Converter
Qty Per
Assembly
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Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 12 of 35
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
© AWL 2009
Date: 14/12/2009
96-900018
J1361001
J1361001
Aerial House
Asheridge Road
Chesham
Buckinghamshire
HP5 2QD United Kingdom
Telephone: +44 (0) 1494 777000
Facsimile: +44 (0) 1494 777002
E-Mail: info@axellwireless.com
www.axellwireless.com
AC INPUT
115V
Standby WDM F/O U/L
to Master Site
Standby WDM F/O D/L
from Master Site
Primary WDM F/O U/L
to Master Site
Primary WDM F/O D/L
from Master Site
MAINS
FILTER
13-003301
20-001507
05-002901
17-019802
96-300067
96-300067
07-004814
07-004814
05-002603
12-030301
05-002603
05-002603
DC
90-850327
DC
DC
90-850327
DC
33dB
33dB
12-030301
17-016401
05-002602
05-002602
94-100004
24V
390-395MHz
02-010501
10-000701
12V
J1421001
05-002603
12-021601
30dB
30dB
12-021601
05-002602
11-007402
30dB
30dB
11-007402
05-002603
11-006702
05-002603
17-019801
30dB
05-002602
17-019801
30dB
11-006702
05-002602
12-023301
37dB
10-000701
05-002603
05-002603
17-016401
11-007402
30dB
30dB
05-002602
17-016401
11-007402
806-824MHz
02-007201
11-006702
30dB
05-002602
12-023301
37dB
50dB FO Remote 20/5/1W UHF/800MHz 60-232301
94-100004
17-019802
380-385MHz
12-030302
30dB
30dB
12-030302
10-000901
05-002602
02-010501
17-019802
851-869MHz
17-016401
+12 VDC
10-000901
+15 VDC
02-007201
+6.45 VDC
11-006702
Alarm
17-020001
17-020602
390-395MHz
16-041402
380-385MHz
806-824MHz
02-007201
851-869MHz
02-007201
PC Control
System Monitoring Point
Alarm/Battery
J1161030
30dB
Controller
H561003
07-004814
Page 13 of 35
Page 1 of 1
A3
Issue: 1
Drawn by: PLB/AJS
Not to Scale
RF D/L O/P to and
U/L I/P from DAS
3.3.
60-232301 System Diagram
3.4.
60-232301 Front View
CAUTION
Hot Surface
Cell Enhancer
Product Ref
60-232301
Made in UK
CAUTION
Hot Surface
CAUTION
Hot Surface
CAUTION
Hot Surface
CAUTION
Hot Surface
POWER ON
ALARM
Danger
High Voltage
Green LED “POWER ON”, illuminated during normal operation
Red LED “ALARM”, illuminated during alarm condition
Lockable door handles
Lifting handles
Wall mount brackets
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Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
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3.5.
60-232301 Side Views
LH Side
RH Side
ANT. FACING
MOBILE
110/230V AC
ALARM
Cable gland for entry of fibre optic cable link to master site
N type port “ANT FACING MOBILE” D/L O/P to and U/L I/P from DAS
3 pole panel plug “110/130V AC”, AC input
6 pole panel plug “ALARM”, Summary alarm output
Earthing connection
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3.6.
60-232301 Interior Views
3.6.1.
Interior View Showing Optical Connectors
F/O TX/RX Module J1361001 (primary optical link)
SC/APC optical port – primary D/L fibre connection from master site
SC/APC optical port – Primary U/L fibre connection to master site
F/O TX/RX Module J1361001 (secondary optical link)
SC/APC optical port – secondary D/L fibre connection from master site
SC/APC optical port – secondary U/L fibre connection to master site
Communications Board Module 17-020602
Control Module H561003
RJ45 Ethernet socket enabling alarm/configuration by PC/laptop
9 pin “D” panel socket “LMT Port”, A local serial port enabling alarm/configuration by PC/laptop
External Alarm and Battery Module J1161030
Summary alarm output (terminals 7 & 8) to “ALARM” connector annotated “D” in section 3.5.
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3.6.2.
Interior View Showing UHF Downlink Path
SC/APC optical port – primary D/L fibre connection from master site
SC/APC optical port – secondary D/L fibre connection from master site
F/O Transceiver Module J1361001 (primary optical link)
F/O Transceiver Module J1361001 (secondary optical link)
RF Relay Assembly 20-001507
AGC Attenuator Module 17-016401
Crossband Coupler 07-004814
Bandpass Filter 02-010501
Variable Switched Attenuator 0-15dB 10-000901
AGC Detector Module 17-019802
3dB Splitter/Combiner 05-002603 (splitting)
Q 5W Power Amplifier 12-021601 (2)
Low Noise Amplifier 30dB 11-007402 (1)
R 3dB Splitter/Combiner 05-002603 (combining)
Low Noise Amplifier 30dB 11-007402 (2)
S AGC Detector Module (+10 to +50dBm) 17-019801
3dB Splitter/Combiner 05-002603 (combining) T Bandpass Duplexer Module 16-041402 (D/L path)
3dB Splitter/Combiner 05-002603 (splitting)
U Crossband Coupler 07-004814
5W Power Amplifier 12-021601 (1)
V N type port connection to DAS (D/L O/P)
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3.6.3.
Interior View Showing 800MHz Downlink Path
SC/APC optical port – primary D/L fibre connection from master site
SC/APC optical port – secondary D/L fibre connection from master site
F/O Transceiver Module J1361001 (primary optical link)
F/O Transceiver Module J1361001 (secondary optical link)
RF Relay Assembly 20-001507
AGC Detector Module 17-019802
Crossband Coupler 07-004814
Bandpass Filter 02-007201
Variable Switched Attenuator 0-15dB 10-000901
AGC Attenuator Module 17-016401 (mounted below ”I” in previous section)
3dB Splitter/Combiner 05-002602 (splitting)
Q 20W Power Amplifier 12-023301 (2)
Low Noise Amplifier 29dB 11-006702 (1)
R 3dB Splitter/Combiner 05-002602 (combining)
Low Noise Amplifier 29dB 11-006702 (2)
S AGC Detector Module 17-019801 (below “Q”)
3dB Splitter/Combiner 05-002602 (combining) T Bandpass Filter 02-007201
3dB Splitter/Combiner 05-002602 (splitting)
U Crossband Coupler 07-004814
20W Power Amplifier 12-023301 (1)
V N type port connection to DAS (D/L O/P)
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Technical Literature
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3.6.4.
Interior View Showing UHF Uplink Path
N type port connection to DAS (D/L O/P)
B Crossband Coupler 07-004814
Bandpass Duplexer Module 16-041402 (U/L path)
3dB Splitter/Combiner 05-002603 (splitting) (below “G”)
Low Noise Amplifier 30dB 11-007402 (1)
F Low Noise Amplifier 30dB 11-007402 (2)
3dB Splitter/Combiner 05-002603 (combining)
H Variable Switched Attenuator 0-30dB 10-000701
AGC Attenuator Module 17-016401 (below “O”) J Bandpass Filter 02-010501
3dB Splitter/Combiner 05-002603 (splitting)
1W Low Power Amplifier 33dB 12-030301 (1)
M 1W Low Power Amplifier 33dB 12-030301 (2)
3dB Splitter/Combiner 05-002603 (combining)
AGC Detector Module 17-019802
P Crossband Coupler 07-004814
3dB Splitter/Combiner 05-002901
F/O TX/RX Module J1361001 (primary optical link)
F/O TX/RX Module J1361001 (secondary optical link)
SC/APC optical port – primary fibre connection to master site
SC/APC optical port – secondary fibre connection to master site
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Technical Literature
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3.6.5.
Interior View Showing 800MHz Uplink Path
N type port connection to DAS (D/L O/P)
B Crossband Coupler 07-004814
Bandpass Filter 02-007201
3dB Splitter/Combiner 05-002602 (splitting) (below “G”)
Low Noise Amplifier 29dB 11-006702 (1)
F Low Noise Amplifier 29dB 11-006702 (2)
3dB Splitter/Combiner 05-002602 (combining)
Variable Switched Attenuator 0-30dB 10-000701
AGC Attenuator Module 17-016401 (below “O”) J Bandpass Filter 02-007201
3dB Splitter/Combiner 05-002602 (splitting)
1W Low Power Amplifier 30dB 12-030302 (2)
L 1W Low Power Amplifier 30dB 12-030302 (1)
3dB Splitter/Combiner 05-002602 (combining)
O AGC Detector Module 17-019802
Crossband Coupler 07-004814
Q 3dB Splitter/Combiner 05-002901
F/O TX/RX Module J1361001 (primary optical link)
F/O TX/RX Module J1361001 (secondary optical link)
SC/APC optical port – primary fibre connection to master site
SC/APC optical port – secondary fibre connection to master site
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3.6.6.
Interior View Showing DC and Alarm Modules
AC Trip Switch 96-900037
Mains Filter Assembly 13-003301
600W PSU Module 96-300067
600W PSU Module 96-300067
Dual Diode Assembly 94-100004 (combining O/Ps from “C” and “D”
DC/DC Converter 90-850327
DC/DC Converter 90-850327
Dual Diode Assembly 94-100004 (combining O/Ps from “F” and “G”
Communications Board Module 17-020602
Control Module H561003
External Alarm and Battery Module J1161030
Generic Interface Board Assembly 17-020001
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M 12V Relay PCB Assemblies 80-008901
N Multi-Voltage DC/DC Converter J1421001
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4.
Installation – General Notes
4.1.
General Remarks
When this equipment is initially commissioned, please use the equipment set-up record sheet in
Appendix B. This will help both the installation personnel and Axell Wireless should these figures be
needed for future reference or diagnosis.
The procedure for installing and commissioning an Axell Wireless Wall Mount BDA is generally as
follows:
1.
Secure the BDA in the chosen wall position.
2.
Connect the optical cable to the optical port inside the BDA
3.
Fix the antenna and connect its cables to the BDA antenna ports.
4.
Connect a suitable mains or battery power supply to the BDA
5.
Switch the equipment mains on with the small switch located inside the BDA on the lower right
hand side of the case.
6.
If Base Station signal is available, make test calls via the BDA to ensure correct operation, if
possible monitoring the signal levels during these calls to ensure that the uplink and downlink
RF levels are as anticipated.
4.2.
Electrical Connections
It is recommended that the electrical mains connection is made by a qualified electrician, who must be
satisfied 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.
Ensure that connections are kept clean and are fully tightened.
4.3.
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 of
the equipment, damage to the equipment will be done if the base station transmitter is then keyed.
4.4.
Optical Connections
The optical input and output port is 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.
Always ensure that connections are kept clean and are fully tightened.
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4.5.
Commissioning
Once all connections are made the equipment is ready for commissioning.
To commission the system the test equipment detailed in Section 5.2. will be required.
Using the system diagrams and the end-to-end test specification (supplied with the equipment), the
equipment should be tested to ensure correct operation.
On initial power up the system alarm indicators on the front door of the equipment should be checked.
A red LED illuminated indicates a fault that must be investigated before proceeding with the
commissioning. A green LED indicates that the power supply is connected to the unit.
In the event that any part of the system does not function correctly as expected, check all connections
to ensure that they are to the correct port, that the interconnecting cables are not faulty and that they
are tightened. The majority of commissioning difficulties arise from problems with the interconnecting
cables and connectors.
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5.
Maintenance – General Notes
5.1.
Fault Finding
5.1.1.
Quick Fault Checklist
All Axell equipment is individually tested to specification prior to despatch. Failure of this type of
equipment is not common. Experience has shown that a large number of fault conditions relating to
tunnel installations result from simple causes often occurring as result of transportation, unpacking
and installation. Below are listed some common problems which have resulted in poor performance or
an indicated non-functioning of the equipment.
•
•
•
•
•
•
•
•
•
•
Mains power not connected or not switched on.
External connectors not fitted or incorrectly fitted.
Internal connectors becoming loose due to transport vibration.
Wiring becoming detached as a result of heavy handling.
Input signals not present due to faults in the antenna and feeder system.
Base transmissions not present due to fault at the base station.
Modems fitted with incorrect software configuration.
Changes to channel frequencies and inhibiting channels.
Hand held radio equipment not set to repeater channels.
Hand held radio equipment not set to correct base station.
5.1.2
Fault Isolation
In the event that the performance of the system is suspect, a methodical and logical approach to the
problem will reveal the cause of the difficulty. The System consists of modules fitted in enclosed
shelves within a rack 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 door LEDs. The green LED on the door should be illuminated, while the red
alarm indicator should be off.
The individual amplifier modules within the unit have a green LED showing through a hole in their
piggy-back alarm board, which is illuminated if the unit is working correctly. If an amplifier is suspect,
check the DC power supply to the unit. If no other fault is apparent use a spectrum analyser to
measure the incoming signal level at the input and then after reconnecting the amplifier input,
measure the output level. Consult with the system diagram to determine the expected gain and
compare result.
In the event that there are no alarms on and all units appear to be functioning it will be necessary to
test the system in a systematic manner to confirm correct operation.
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5.1.3
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.
5.1.4
Uplink
Testing the uplink involves a similar procedure to the downlink except that the frequencies used are
those transmitted by the mobile equipment.
5.1.5
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.
5.1.6
Fault repair
Once a faulty component has been identified, a decision must be made on the appropriate course to
carry out a repair. A competent engineer can quickly remedy typical faults such as faulty connections
or cables. The exceptions to this are cable assemblies connecting bandpass filter assemblies that are
manufactured to critical lengths to maintain a 50-ohm system.
Care should be taken when replacing cables or connectors to ensure that items are of the correct
specification. The repair of component modules such as amplifiers and bandpass filters will not
usually be possible in the field, as they frequently require specialist knowledge and test equipment to
ensure correct operation. It is recommended that items of this type are replaced with a spare unit and
the faulty unit returned to Axell Wireless for repair.
5.1.7
Service Support
Advice and assistance with maintaining and servicing this system are available by contacting
Axell Wireless Ltd., see section 2.7.
NOTE
Individual modules are not intended to be repaired on site and attempts at repair will
invalidate active warranties. Company policy is that individual modules should be repaired
by replacement. Axell Wireless Ltd. maintains a level of stock of most modules which can
usually be despatched at short notice to support this policy.
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5.2
Tools & Test Equipment
The minimum tools and test equipment needed to successfully service this Axell Wireless product
are as follows:Spectrum analyser
Signal Generator
Attenuator
Test Antenna
Optical Power Meter
Digital multi-meter
Test cable x 2
Test cable x 2
Hand tools
5.3.
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
1300 – 1560nM (-40 - +10dB)
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
Care of Modules
5.3.1.
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 and inserted with care. The module may have
connectors on its underside, which might not be visible to the service operative.
5.3.2.
LNA Replacement (general procedure)
The following general instructions should be followed to remove a module:
1)
2)
3)
4)
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).
5.3.3.
1)
2)
3)
4)
Module Replacement (general procedure)
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.
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 27 of 35
5.3.4.
Power Amplifiers Replacement (general procedure)
1)
Remove power to the unit. (Switch off at 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 to be removed before lifting the amplifier.
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.
5.3.5.
1)
2)
3)
4)
5)
6)
7)
Low Power Amplifier Replacement (general procedure)
Disconnect the mains power supply and disconnect the 24V dc supply connector for the LPA.
Disconnect the RF input and output cables from the LPA.
Disconnect the alarm connector.
Remove the alarm monitoring wires from (D type connector) pins 9 and 10.
Remove the LPA module by removing the four retaining screws, replace with a new LPA
module and secure it with the screws.
Connect the RF cables to the LPA input and output connectors. Reconnect the wires to the
alarm board connector pins 9 and 10.
Reconnect the DC supply connector and turn the mains switch on.
Note: Tighten SMA connectors using only a dedicated SMA torque spanner. If SMA connectors are
over-tightened, irreparable damage will occur. Do not use adjustable pliers to loosen/tighten SMA
connectors.
Also take care not to drop or knock the module as this can damage (or misalign in the case of tuned
passive modules) sensitive internal components. Always store the modules in an environmentally
friendly location
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 28 of 35
5.3.6.
Module Transportation
To maintain the operation, performance and reliability of any module it must be stored and
transported correctly. Any module not installed in a whole system must be kept in an anti-static bag or
container. These bags or containers are normally identified by being pink or black, and are often
marked with an ESD label. Any module sent back to Axell Wireless for investigation/repair must be so
protected. Please contact the Axell Wireless quality department before returning a module, see
section 2.7.
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 29 of 35
Appendix A
A.1.
Glossary of Terms used in this document
Repeater or
Cell Enhancer
Band Selective
Repeater
Channel Selective
Repeater
AC
AGC
BBU
BDA
BTS
B/W
CEMS
C/NR
DAS
DC
Downlink (D/L)
F/O
GND
ID
I/P
LCX
LED
LNA
LPA
Mobile(s)
MOU
MTBF
N/A
N/C (of Relays)
N/O (of Relays)
OFR
OIP3
O/P
P1dB
PA
RF
RHNC
RSA
RX
SDR
S/N
TX
Uplink (U/L)
UPS
VSWR
WDM
Date Format
A Radio Frequency (RF) amplifier which can simultaneously amplify and
re-broadcast Mobile Station (MS) and Base Transceiver Station (BTS)
signals.
A Repeater designed for operation on a range of channels within a
specified frequency band.
A Repeater, designed for operation on specified channel(s) within a
specified frequency band. Channel frequencies may be factory set or onsite programmable.
Alternating Current
Automatic Gain Control
Battery Backup Unit
Bi-directional Amplifier
Base Transceiver Station (Base Station)
Bandwidth
Coverage Enhancement Management System
Carrier-to-Noise Ratio
Distributed Antenna System
Direct Current
Signals transmitted from the BTS to the Mobiles
Fibre Optic
Ground
Identification (Number)
Input
Leaky Coaxial Cable (Leaky Feeder).
Light Emitting Diode
Low Noise Amplifier
Low Power Amplifier
Hand-portable or other “Mobile” RF Transceiver equipment
Master Optical Unit
Mean Time Between Failures
Not Applicable
Normally Closed
Normally Open
On Frequency Repeater
Output Third Order Intercept Point
Output
1dB Compression Point
Power Amplifier
Radio Frequency
Relative Humidity, Non Condensing
Receiver/Splitter Amplifier
Receiver (Received)
Software-Defined Radio
Serial Number
Transmitter (Transmitted)
Signals transmitted from the Mobiles to the BTS
Uninterruptible Power Supply
Voltage Standing Wave Ratio
Wave division multiplex
Date Format used in this document is dd/mm/yyyy
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 30 of 35
A.2.
Key to Drawing Symbols used in this document
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
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Issue No. 2
Date 22/12/2009
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A.3.
EC Declaration of Conformity
In accordance with BS EN ISO/IEC 17050-1&-2:2004
Axell Wireless Limited
Aerial House
Asheridge Road
Chesham
Buckinghamshire HP5 2QD
United Kingdom
Declares, under our sole responsibility that the following product:
Product Part No.
60-232301
Product Description Dual Band Fibre Fed BDA
In accordance with the following directives:
1999/5/EC
The Radio & Telecommunications Terminal Equipment Directive Annex V
and its amending directives
Has been designed and manufactured to the following standard[s] or other normative document[s]:
BS EN 60950
Information technology equipment.
Safety. General requirements.
ETS EN 301 489-1
EMC standard for radio equipment and services.
Part 1. Common technical requirements.
I hereby declare that the equipment named above has been designed to comply with the relevant
sections of the above referenced specifications. The unit complies with all essential requirements of
the Directives.
SIGNED
B. S. Barton
Operations Director
DATE: 18/12/2009
Registered Office: Aerial House, Asheridge Road, Chesham, Buckinghamshire, HP5 2QD England Registered No. 4042808 (England)
www.axellwireless.com
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 32 of 35
A.4.
Waste Electrical and Electronic Equipment (WEEE) Notice
The Waste Electrical and Electronic Equipment (WEEE) Directive became law in
most EU countries during 2005. The directive applies to the disposal of waste
electrical and electronic equipment within the member states of the European
Union.
As part of the legislation, electrical and electronic equipment will feature the
crossed out wheeled bin symbol (see image at left) on the product or in the
documentation to show that these products must be disposed of in accordance
with the WEEE Directive.
In the European Union, this label indicates that this product should not be disposed of with domestic
or "ordinary" waste. It should be deposited at an appropriate facility to enable recovery and recycling.
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 33 of 35
A.5.
Issue
No.
Document Amendment Record
Date
15/12/2009
Incorporated
by
AJS
22/12/2009
AJS
Section
Amended
Reason for new issue
Draft
Issue
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
Page 34 of 35
Appendix B
B.1
Initial Equipment Set-Up Calculations
General Information
Site Name:
Client Name:
Date:
AWL Equip. Model No.
Antenna Systems
Model
Gain
Azimuth
Comments
Type
Loss
Length
Comments
A - Service Antenna
B – Donor Antenna
C – Service Feeder
D – Donor Feeder
Initial Parameters
E – CE Output Power
F – Antenna Isolation
G – Input signal level from donor BTS
Operating Voltage
Downlink Calculations
Parameter
Input signal level (G)
CE max. o/p power (E)
Gain setting
Isolation required
Service antenna gain (A)
Service antenna feeder loss (C)
Effective radiated power (ERP)
Attenuator setting
dBm
dB
dBm
Comments
Value
dBm
dBm
dB
dB
dB
dB
dBm
dB
E-G
(Gain + 10dB)
E+A-C
CE gain-gain setting
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
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
Comments
Value
E+B-D
(CE gain-gain setting)
Axell Wireless Limited
Dual Band Fiber Fed BDA 60-232301
Technical Literature
Document Number 60-232301HBK
Issue No. 2
Date 22/12/2009
dBm
dBm
dB
dB
dB
dB
dBm
dB
Page 35 of 35

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