220MHz Fibre Feed BDA Equipment User Reference For Pinnacle AFL Works Order Nō.: Q113673 AFL product part Nō.’s: 60-165801 (Fibre Fed 40W BDA) Meadowlands Fiber Fed BDA Equipment User Handbook Handbook Nō.
Table of Contents INTRODUCTION ............................................................................................................................................4 Scope................................................................................................................................................................................ 4 Purpose....................................................................................................................................................
AMENDMENT LIST RECORD SHEET Issue Nō. A Date 19/12/05 Incorporated by G Dawson Page No.’s Amended Reason for new issue AA 03/01/06 CMH 2nd Draft 1 03/01/2006 CMH 1st Issue 2 04/01/2006 CMH Draft 2nd Issue Missing CE conformity numbers Document Ref:-60-165801HBKM Meadowlands Fiber Fed BDA Equipment User Handbook Handbook Nō.
INTRODUCTION Scope This handbook is for use solely with the equipment identified by the AFL Part Number shown on the front cover. It is not to be used with any other equipment unless specifically authorised by Aerial Facilities Limited. Purpose The purpose of this handbook is to provide the user/maintainer with sufficient information to service and repair the equipment to the level agreed.
Glossary of Terms Repeater or Cell Enhancer Band Selective Repeater Channel Selective Repeater A Radio Frequency (RF) amplifier which can simultaneously amplify and re-broadcast Mobile Station (MS) and Base Transceiver Station (BTS) signals. A Cell Enhancer designed for operation on a range of channels within a specified frequency band. A Cell Enhancer, designed for operation on specified channel(s) within a specified frequency band. Channel frequencies may be factory set or on-site programmable.
Key to AFL RF Module Drawing Symbols Meadowlands Fiber Fed BDA Equipment User Handbook Handbook Nō.
EC DECLARATION OF CONFORMITY In accordance with BS EN ISO/IEC 17050-1&-2:2004 0086 AERIAL FACILITIES LTD Aerial House Asheridge Road Chesham Bucks HP5 2QD United Kingdom DECLARES, UNDER OUR SOLE RESPONSIBILITY THAT THE FOLLOWING PRODUCT PRODUCT PART NO[S] 60-165801 PRODUCT DESCRIPTION Fibre fed BDA IN ACCORDANCE WITH THE FOLLOWING DIRECTIVES: 1999/5/EC directives The Radio & Telecommunications Terminal Equipment Directive Annex V and its amending HAS BEEN DESIGNED AND MANUFACTURED TO THE FOLLOWING STAN
1. SAFETY CONSIDERATIONS 1.1 Earthing of Equipment Cell Enhancers supplied from the mains must be connected to grounded outlets and earthed in conformity with appropriate local, national and international electricity supply and safety regulations.
1.3 RF Radiation Hazard RF radiation, (especially at UHF frequencies) arising from transmitter outputs connected to AFL’s equipment, must be considered a safety hazard. This condition might only occur in the event of cable disconnection, or because a ‘spare’ output has been left unterminated. Either of these conditions would impair the system’s efficiency. No investigation should be carried out until all RF power sources have been removed.
1.4 Chemical Hazard Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes used in devices within equipment produced by Aerial Facilities Ltd. Beryllium oxide dust can be toxic if inhaled, leading to chronic respiratory problems. It is harmless if ingested or by contact. Products that contain beryllium are load terminations (dummy loads) and some power amplifiers. These products can be identified by a yellow and black “skull and crossbones” danger symbol (shown above).
1.5 Laser safety General working practices adapted from EN60825-2: 2000 “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.
2. OVERVIEW/ SYSTEM DESCRIPTION The system consists of a fibre optic transmitter and receiver that are co located with the existing BTS in order to convert the RF signals to optical, which can then be fed to the optical BDA remotes. The optical fibre remote BDA’s comprise of a high selectivity filter and duplexing system built into an environmentally protected enclosure to enable the high power downlink and low power uplink signals to co-exist on a common antenna port.
3. FIBRE-FED BDA (60-165801) 3.1 Component Layout Photograph Uplink Attenuator Downlink Attenuator Fibre Interface FO Tx AC Circuit Breaker FO Rx Meadowlands Fiber Fed BDA Equipment User Handbook Handbook Nō.
3.2 FO BDA Electrical Specifications PARAMETER Frequency range: Bandwidth: Gain: Uplink Gain Adjustment: Downlink gain adjustment: Uplink Power: Downlink Power: IP3: Uplink IP3: Downlink Noise Figure: VSWR: RF Connectors: F/O Connectors: Temperature range: operational: storage: Alarms Fitted: (volt-free contacts/TTL) SPECIFICATION 217.5-218.0MHz (Tx) 219.5-220.0MHz (Rx) 0.5MHz 0dB 0 - 30dB (in 2dB steps) 0-15dB (in 1dB steps) 1W 40W (20W x2) 47dBm 54dBm <6dB better than 1.
3.3 FO BDA RF Circuit Diagram, Drg. Nō. 60-165881 Meadowlands Fiber Fed BDA Equipment User Handbook Handbook Nō.
3.4 FO BDA Alarm Circuit Diagram, Drg. Nō. 60-165851 Meadowlands Fiber Fed BDA Equipment User Handbook Handbook Nō.
3.5 FO BDA Parts List AFL Part Nō.
4. INSTALLATION When this equipment is initially commissioned, please use the equipment set-up record sheet in Appendix A. This will help both the installation personnel and AFL should these figures be needed for future reference or diagnosis. 4.1 General Remarks 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.
4.3 Commissioning Once all connections are made the equipment is ready for commissioning. To commission the system the test equipment detailed in Section 6.2 will be required. Using the system diagrams and the end-to-end test specification, the equipment should be tested to ensure correct operation. Typical RF levels that are not listed in the end-to-end specification, such as input levels to the fibre transmitters are detailed in the maintenance section of this manual.
5. MAINTENANCE 5.1 5.1.1 Fault Finding Quick Fault Checklist All AFLequipment 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.
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.
5.1.6 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.
5.3 5.3.1 Care of Modules General Comments Many of the active modules contain semiconductor devices utilising MOS technology, which can be damaged by electrostatic discharge. Correct handling of such modules is mandatory to ensure their long-term reliability. To prevent damage to a module, it must be withdrawn/inserted with care. The module may have connectors on its underside, which might not be visible to the service operative. 5.3.
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.
APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS GENERAL INFORMATION Client Name: AFL Equip. Model Nō. Site Name: Date: Model ANTENNA SYSTEMS Gain Azimuth Comments Type Loss Comments A - Service Antenna B – Donor Antenna Length C – Service Feeder D – Donor Feeder INITIAL PARAMETERS E – CE Output Power F – Antenna Isolation G – Input signal level from donor BTS Operating Voltage dBm dB dBm V DOWNLINK CALCULATIONS Parameter Comments Input signal level (G) CE max.
