Axell Wireless 60 1742SERIES User Manual

MWAA Primary F/O Head End Documentation

B010 IF BDA 60-174202

User Handbook

for

Communications Technology Services

AWL Works Order Q117141

Axell Wireless UK

Aerial House

Asheridge Road

Chesham, Buckinghamshire

HP5 2QD, United Kingdom

Tel: + 44 (0) 1494 777000

Fax: + 44 (0) 1494 777002

[e-mail]
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

Technical Literature

MWAA Primary F/O Head End Documentation
B010 IF BDA 60-174202

Document Number 60-174202HBK Issue No. 1 Date 23/07/2009 Page 1 of 24

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. MWAA Primary Headend B010 IF BDA 60-174202..................................................................... 6

3.1. 60-174202 List of Major Sub-Components............................................................................. 6

3.2. 60-174202 System Diagram................................................................................................... 7

3.3. 60-174202 Auxiliary Alarm Wiring Diagram ........................................................................... 8

3.4. 60-174202 Front Panel........................................................................................................... 9

3.5. 60-174202 Rear Panel ......................................................................................................... 10

4. Installation – General Notes....................................................................................................... 11

4.1 General Remarks ................................................................................................................. 11

4.2 Electrical Connections.......................................................................................................... 11

4.3 RF Connections....................................................................................................................11

4.3.1. Termination of Unused Ports................................................................................................ 12

4.4 Optical Connections ............................................................................................................. 12

4.5 Commissioning..................................................................................................................... 12

4.6 Antenna Installation & Gain Calculations ............................................................................. 12

4.7 Antenna Isolation..................................................................................................................13

5. Maintenance............................................................................................................................... 14

5.1. Fault Finding......................................................................................................................... 14

5.1.1. Quick Fault Checklist........................................................................................................ 14

5.1.2 Fault Isolation ................................................................................................................... 14

5.1.3 Downlink...........................................................................................................................15

5.1.4 Uplink ...............................................................................................................................15

5.1.5 Checking service .............................................................................................................. 15

5.1.6 Fault repair ....................................................................................................................... 15

5.1.7 Service Support................................................................................................................ 15

5.2 Tools & Test Equipment ....................................................................................................... 16

5.3 Care of Modules................................................................................................................... 16

5.3.1 General Comments .......................................................................................................... 16

5.3.2 LNA Replacement (general procedure)............................................................................ 16

5.3.3 Module Replacement (general procedure)....................................................................... 16

5.3.4 Power Amplifier Replacement (general procedure) .........................................................17

5.3.5 Low Power Amplifier Replacement (general procedure).................................................. 17

5.3.6 Module Transportation: ....................................................................................................18

Appendix A........................................................................................................................................... 19

A.1. Glossary of Terms used in this document ............................................................................ 19

A.2. Key to Drawing Symbols used in this document .................................................................. 20

A.3. EC Declaration of Conformity...............................................................................................21

A.4. Waste Electrical and Electronic Equipment (WEEE) Notice ................................................22

A.5. Document Amendment Record ............................................................................................ 23

Appendix B........................................................................................................................................... 24

B.1 Initial Equipment Set-Up Calculations.................................................................................. 24

Axell Wireless Limited

Technical Literature
Document Number 60-174202HBK Issue No. 1 Date 23/07/2009 Page 2 of 24

MWAA Primary F/O Head End Documentation
B010 IF BDA 60-174202

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 cover. 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.

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

Technical Literature
Document Number 60-174202HBK Issue No. 1 Date 23/07/2009 Page 3 of 24

MWAA Primary F/O Head End Documentation
B010 IF BDA 60-174202

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.

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.

c) Regular intervals, thereafter.

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

Technical Literature
Document Number 60-174202HBK Issue No. 1 Date 23/07/2009 Page 4 of 24

MWAA Primary F/O Head End Documentation
B010 IF BDA 60-174202

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 fibres 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 [phone]
Fax. [phone]
e-mail

[e-mail]

Axell Wireless Limited

Technical Literature

MWAA Primary F/O Head End Documentation
B010 IF BDA 60-174202

Document Number 60-174202HBK Issue No. 1 Date 23/07/2009 Page 5 of 24

3. MWAA Primary Headend B010 IF BDA 60-174202

There are two 60-174202 IF BDAs in Primary F/O Head End Cab. 1 - 60-174201, both BDAs are
housed in rack 2.

MWAA Primary Headend B010 IF BDA (1) (Loudoun County 1) 60-174202
MWAA Primary Headend B010 IF BDA (2) (Loudoun County 2) 60-174202

Each 60-174202 IF BDA is an 8U, 19” rack mount tray and houses RF filtering and amplification
modules.

RF signals are received from off-air antennas in the Downlink direction, filtered and amplified and sent
via 60-174204 MWAA Primary B010 Splitter/Alarm Interface Shelf to the Fibre Optic Interface in
MWAA Primary F/O Head End BDA CAB 2.

RF signals are received in the Uplink direction from the Fibre Optic Interface in MWAA Primary F/O
Head End BDA CAB 2, via 60-174204 MWAA Primary B010 Splitter/Alarm Interface Shelf, filtered and
amplified and then passed to an antenna.

60-174202 IF BDA (1) (Loudoun County 1) receives its downlink signal from and sends its Uplink
signal to the “Ramp Tower” antenna.

60-174202 IF BDA (2) (Loudoun County 2) receives its downlink signal from and sends its Uplink
signal to the “Bull Run Tower” antenna.

3.1. 60-174202 List of Major Sub-Components

Component

Part
02-005801 Bandpass Filter 1
02-005805 Bandpass Filter 1
10-000701 Variable Switched Attenuator 0 to 30dB 2
11-005902 Low Noise Amplifier 2
11-006702 Low Noise Amplifier 2
12-018601 5W Power Amplifier 2
16-096601 Duplexer Module 1
17-001117 AGC Detector Module 2
17-001201 AGC Attenuator Module 2
17-003043 Channel Selectivity Module 2
17-011501 Channel Control Module 2
20-001601 12V Dual Relay Board 1
80-008901 12V Relay Assembly 1

Component Part Description Qty Per

Assembly

Axell Wireless Limited

Technical Literature
Document Number 60-174202HBK Issue No. 1 Date 23/07/2009 Page 6 of 24

MWAA Primary F/O Head End Documentation
B010 IF BDA 60-174202

3.2. 60-174202 System Diagram

Drawing Number 60-174282

Axell Wireless Limited

Technical Literature
Document Number 60-174202HBK Issue No. 1 Date 23/07/2009 Page 7 of 24

MWAA Primary F/O Head End Documentation
B010 IF BDA 60-174202

3.3. 60-174202 Auxiliary Alarm Wiring Diagram

Drawing Number 60-174252

Axell Wireless Limited

Technical Literature
Document Number 60-174202HBK Issue No. 1 Date 23/07/2009 Page 8 of 24

MWAA Primary F/O Head End Documentation
B010 IF BDA 60-174202