Baltimore Transit Radio Repeater System User/Maintenance Handbook (2) for Intelect Corp. AFL Works Order: AFL product part No.: Q113737 60-166501 Aerial Facilities Limited Technical Literature Baltimore Radio Repeater System Maintenance Handbook Handbook Number 60-166501HBKM Issue No.
1. INTRODUCTION Scope and Purpose of this Document This handbook is for use solely with the equipment identified by the AFL Part Number shown on the front cover. It is not to be used with any other equipment unless specifically authorised by Aerial Facilities Limited. This is a controlled release document and, as such, becomes a part of Aerial Facilities’ Total Quality Management System. Alterations and modification may therefore only be performed by Aerial Facilities Ltd.
Table of Contents 1. INTRODUCTION.......................................................................................................................... 2 Scope and Purpose of this Document................................................................................................. 2 Limitation of Liability Notice................................................................................................................. 2 2. SAFETY CONSIDERATIONS .................................................
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.
2.4 Chemical Hazard Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes used in devices within equipment produced by Aerial Facilities Ltd. Beryllium oxide dust can be toxic if inhaled, leading to chronic respiratory problems. It is harmless if ingested or by contact. Products that contain beryllium are load terminations (dummy loads) and some power amplifiers. These products can be identified by a yellow and black “skull and crossbones” danger symbol (shown above).
3.
3.1 3.2 Fibre Fed High Power Remote BDA (60-166501) Fibre Fed High Power Remote BDA Description The remote equipment is of two different types, an off-air repeater and a fibre fed repeater. The optical repeater is directly linked to the master site by fibre optic cable and has a high power downlink (40Watts) output to the LCX antennas. Both remote repeaters have an automatic gain control loop in each path to lessen the overloading effects of a mobile operated close to the leaky feeder antennas.
3.5 Fibre-Fed High Power Remote Site System Diagram, Drg. No. 60-166581 Maintenance Handbook Baltimore Radio Repeater System Handbook No.
3.6 Fibre-Fed High Power Remote Site Alarm Diagram, Drg. Nǀ 60-166551 Maintenance Handbook Baltimore Radio Repeater System Handbook No.
3.7 Remote Site UHF BDA Alarm Wiring Diagram, Drg. No. 60-166551 Maintenance Handbook Baltimore Radio Repeater System Handbook No.
3.8 Remote Site UHF BDA Connections to NFM Diagram, Drg. No. 60-166552 Maintenance Handbook Baltimore Radio Repeater System Handbook No.
3.9 Remote Site UHF BDA Outline Drawing, Drg. No. 60-166591 Maintenance Handbook Baltimore Radio Repeater System Handbook No.
3.10 Fibre Fed High Power Remote BDA Parts List (60-166501) part 1 AFL Part No.
Fibre Fed High Power Remote BDA Parts List (60-166501) part 2 AFL Part No. Part Description 96-700034 LED RED 5mm IP67 96-700035 LED GREEN 5mm IP67 96-900018 AC TRIP SWITCH (5 AMP M.C.B.) 96-920037 THERMAL SWITCH 70c N/C 1A TO-220 97-000001 WALL MOUNTING BRACKET 97-300010 MAINS SUPPLY INPUT COVER 97-300028 DC SWITCH AND FUSE BOX 97-400010 BLACK PLASTIC HANDLE 50mm HIGH 97-900004 RUBBER FOOT FOR CELL ENHANCER 98-000001 FC/APC D-HOLE ADAPTOR ADA0004 98-500004 FC/APC-FC/APC FIBREOPTIC CABLE 0.
4. INSTALLATION & COMMISIONING 4.1 Initial Installation Record When this equipment is initially commissioned, please use the equipment set-up record sheet in the Appendices. This will help both the installation personnel and AFL should these figures be needed for future reference or diagnosis. 4.
4.3 A). Antenna Isolation First set up the two antennas & measure the isolation between them. Measure Isolation between antennas Yagi Yagi or leaky feeder Mobiles Base site (donor) B). Install the Cell Enhancer with its gain set 10dB below the isolation figure obtained above. Yagi or leaky feeder Yagi Base port Mobile port Cell Enhancer Mobiles Base site (donor) Maintenance Handbook Baltimore Radio Repeater System Handbook No.
4.4 Rack Mounted Equipment The size and weight of the equipment racks mean that they represent a significant topple hazard unless they are bolted to the floor though the mounting holes in the base of the unit. In the interests of safety this should be done before any electrical, RF, or optical connections are made. The equipment must be located on a flat, level surface that is made from a material suitable for bearing the weight of the rack assemblies.
4.6 Wall Mounted Equipment The procedure for installing and commissioning a wall-mounted Bi-Directional Amplifier unit is generally as follows: 3 Fix the unit in the chosen position. Ensure the mounting site is a straight, smooth, perpendicular surface (brick or concrete recommended). Mounting bracket centres/dimensions will be found in the specifications section (3.3). After fixing, mechanically test the installation before proceeding.
5. FAULT FINDING / MAINTENANCE 5.1 Tools & Test Equipment The minimum tools and test equipment needed to successfully service this AFL product are as follows:Spectrum analyser: Signal Generator: Attenuator: Test Antenna: Digital multi-meter: Test cable x 2: Test cable x 2: 100kHz to 2GHz (Dynamic range = 90dB). 30MHz to 2GHz (-120dBm to 0dBm o/p level). 20dB, 10W, DC-2GHz, (N male – N female). Yagi or dipole for operating frequency. Universal Volt-Ohm-Amp meter. N male – N male, 2M long RG214.
5.3 Quick Fault Checklist All AFL equipment is individually tested to specification prior to despatch. Failure of this type of equipment is not common. Experience has shown that a large number of fault conditions relating to 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.
5.8 Care of Modules 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. Good engineering practices should be observed at all times. To prevent damage to a module, it must be withdrawn/inserted with care. 5.
5.12 Low Power Amplifier Replacement 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 (D type connector). 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.
6 APPENDIXES 6.1 Glossary of Terms used in this document Repeater or Cell Enhancer Band Selective Repeater Channel Selective Repeater AC AGC BBU BTS CEMS C/NR DAB DC Downlink (D/L) FO GND ID LED LCX LNA LPA MOU M/S MS MTBF N/A N/C OFR OIP3 PA RF RSA RX S/N TTL TX Uplink (U/L) VSWR WDM A Radio Frequency amplifier which can simultaneously amplify and rebroadcast Mobile Station and Base Transceiver Station signals.
6.2 AFL RF Module Drawing Key Maintenance Handbook Baltimore Radio Repeater System Handbook No.
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6.4 Issue No. A 1 Amendment List Record Sheet Date 09/02/2006 Incorporated by CMH CMH Page Nos. Amended Reason for new issue 1st Draft 1st Issue Document Ref:- 60-166501HBKM Maintenance Handbook Baltimore Radio Repeater System Handbook No.
