MWAA Primary F/O Head End Documentation Primary Head End BDA 60-174303 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 Axell Wireless Limited Technical Literature Document Number 60-214802HBK info@axellwireless.com www.axellwireless.
Table of Contents 1. Introduction .................................................................................................................................. 3 1.1. Scope and Purpose of Document .......................................................................................... 3 1.2. Limitation of Liability Notice.................................................................................................... 3 2. Safety Considerations ......................................................
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.
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.
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).
3. Primary Head End BDA 60-174303 There are four Primary Head End BDAs 60-174303 in Primary F/O Head End CAB 2 - 60-174301, all housed in rack 2.
3.2. 60-174303 System Diagram Drawing Number 60-174353 Axell Wireless Limited Technical Literature Document Number 60-214802HBK MWAA Primary F/O Head End Documentation Primary Head End BDA 60-174303 Issue No.
3.3. 60-174303 Front Panel POWER A A B ALARM B Green LED “POWER ON” Illuminated during normal operation. Red LED “ALARM” Illuminated during alarm state. Axell Wireless Limited Technical Literature Document Number 60-214802HBK MWAA Primary F/O Head End Documentation Primary Head End BDA 60-174303 Issue No.
3.4. 60-174303 Rear Panel C B C D E A B 60-174303 0dB 0dB 0dB 0dB 2dB 4dB 8dB 16dB 0dB 0dB 0dB 0dB 2dB 4dB 8dB 16dB A UPLINK ATTENUATOR DOWNLINK ATTENUATOR ALARM OUTPUT H FUSE T6.
3.4.1.
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. Wall Mount equipment The procedure for installing and commissioning an Axell Wall Mount equipment is generally as follows: 1) Secure the Repeater in the chosen wall position.
4.3.1. Termination of Unused Ports In the event that any RF ports are unused (available for future expansion) these ports must be kept terminated with the load terminations supplied by Axell for that purpose Ensure that connections are kept clean and are fully tightened. 4.4 Optical Connections The optical input and output ports will be shown in the system drawings. The ports are supplied with a green plastic cover, which must be removed prior to the connection of the fibre cable.
4) Ensure that the mobile facing antenna has at least 70dB isolation from the nearest mobile. (This is usually easily achieved when using a leaky feeder.) 5) The equipment gain is set by setting the variable switched attenuators in each path (uplink and downlink) refer to the photographs and layout drawings for the exact attenuator locations). Note that the uplink (mobile to base) and downlink (base to mobile) path gains are set independently.
5. Maintenance 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.
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.
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.
5.3.4 Power Amplifier 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.
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.
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 S/N TX Uplink (U/L) 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.2. Key to Drawing Symbols used in this document Axell Wireless Limited Technical Literature Document Number 60-214802HBK MWAA Primary F/O Head End Documentation Primary Head End BDA 60-174303 Issue No.
A.3.
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.
A.5. Issue No. A 1 Document Amendment Record Date 23/07/2009 23/07/2009 Incorporated by AJS AJS Axell Wireless Limited Technical Literature Document Number 60-214802HBK Section Amended Reason for new issue Draft Issue MWAA Primary F/O Head End Documentation Primary Head End BDA 60-174303 Issue No.
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.
