Aerial Facilities Limited UHF Bi-Directional Amplifier AFL product part No: Aerial Facilities Limited Technical Literature Handbook Number: 60-137705HBKM 60-137705 Document layout Issue No: A Date: 02/03/2006 Page: 1 of 20
Table of Contents 1. INTRODUCTION ............................................................................................................................... 3 Scope and Purpose of Document ....................................................................................................... 3 Limitation of Liability Notice................................................................................................................. 3 2. SAFETY CONSIDERATIONS .........................................
1. INTRODUCTION Scope and Purpose of 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.
2. SAFETY CONSIDERATIONS 2.1 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. 2.2 Electric Shock Hazard Electrical shocks due to faulty mains driven power supplies.
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. EQUIPMENT OVERVIEW The BDA system comprises two standard 19” rack mounted shelves:60-173705 (PSU & RF Amplifiers BDA shelf) 80-245102 (Stand-alone Amplifier shelf) 3.
3.2 Mechanical Specification PARAMETER Racks Height: Width: Depth: Height: Shelves: Temperature range: Width: Depth: operational: storage: Weight: Humidity: RF Connectors: Environmental Protection: Supply Cable: Handbook Title:-BDA User Handbook Handbook No. 60-137705HBK SPECIFICATION 23U Standard Eurorack 19" (482.6mm) 600mm (800 optional) 8U (BDA shelf) 4U (amplifier shelf) 19" (482.
3.3 Parts List AFL Part Nō.
3.4 System Drawings 3.4.2 BDA Shelf System Diagram Handbook Title:-BDA User Handbook Handbook No.
Page: 10 of 20 RP APPD GD 3/1/06 DA TE 1 A LL DIM E NS IONS A RE IN m m UNLE S S OTHE RWIS E S TA TE D CHK D MRB DRA WN 2 NO DE CIM A L P LA CE ± 1m m ONE DE CIM A L P LA CE ± 0.3m m TWO DE CIM A L P LA CE S ± 0.1m m TOLE RA NCE S 3 S CA LE - THIS IS A P ROP RIE TA RY DE S IGN OF A E RIA L FA CILITIE S LTD. RE P RODUCTION OR US E OF THIS DE S IGN B Y OTHE RS IS P E RM IS S IB LE ONLY IF E X P RE S S LY A UTHORIS E D IN WRITING B Y A E RIA L FA CILITIE S LTD.
4. INSTALLATION 4.1 Initial Installation Record 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. Handbook Title:-BDA User Handbook Handbook No.
5. FAULT FINDING & MAINTENANCE 5.1 General Fault Finding Procedures 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. 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.
5.2 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.
5.5 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. It is important to bear in mind that the system includes a radiating cable network and base stations that may be faulty or may have been damaged. 5.6 Service Support Advice and assistance with maintaining and servicing this system are available by contacting Aerial Facilities Ltd. 5.
5.8 General Maintenance Procedures 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.
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. 5.12 Low Power Amplifier Replacement Disconnect the mains power supply and disconnect the 24V dc supply connector for the LPA.
APPENDIX A Amendment List Record Sheet Issue No. Date A 02/03/2006 Incorporated by CMH Page Nos. Amended Reason for new issue 1st Draft Document Ref:-60-137705HBKM Handbook Title:-BDA User Handbook Handbook No.
Glossary of Terms Repeater or Cell Enhancer A Radio Frequency (RF) amplifier which can simultaneously amplify and re-broadcast Mobile Station (MS) and Base Transceiver Station (BTS) signals. Band Selective Repeater A Cell Enhancer designed for operation on a range of channels within a specified frequency band. Channel Selective Repeater 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 Drawing Symbols used in this document Handbook Title:-BDA User Handbook Handbook No.
APPENDIX B Initial Equipment Set-Up Calculations General Information Site Name: Date: Client Name: AFL 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 dBm dB dBm V Downlink Calculations Parameter Input signal level (G) CE max.
