UHF Bandselective Bi-Directional Amplifier 90dB 40/5W User/Maintenance Handbook For Pacific Wireless Communications L.L.C. AFL Works Order AFL Product Part No. Aerial Facilities Limited Technical Literature Document Number 55-199102HBKM Q116107 55-199102 UHF Bandselective BDA 90dB 40/5W Issue No.
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 Aerial Facilities Limited (AFL) Part Number shown on the front cover. It is not to be used with any other equipment unless specifically authorised by AFL. 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 AFL.
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 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 AFL UHF Bandselective, Bi-Directional Amplifier (BDA) (55-199102) is a 2-way on-band repeater. The equipment is supplied in a four-point, wall-mounting, environmentally protected (IP65) aluminium alloy lockable case. All RF ports and connectors are also IP65 standard making the entire enclosure and connecting ports weatherproof. Handles are provided for carrying the unit and the door is fitted with locks. A supply isolator switch is fitted inside the unit and there are D.C.
3.1. UHF Bandselective, BDA (55-199102) List of major sub modules Component Part 02-010701 05-002603 10-001725 12-021601 12-026901 13-001714 13-003011 17-017301 80-008901 96-300054 3.2.
3.3. UHF Bandselective, BDA (55-199102) System Schematic Drawing Number: 55-199182 UHF Bandselective BDA 90dB 40/5W Document Number 55-199102HBKM Issue No.
3.4. Photographs 3.4.1. Front of case – door closed A B Green LED “Power On” Red LED “Alarm” UHF Bandselective BDA 90dB 40/5W Document Number 55-199102HBKM Issue No.
3.4.2.
3.4.3. Right Hand and Left Hand sides A B C D E Antenna Facing Mobile Port Alarm Output Earth Connection AC Input Antenna Facing Base Port UHF Bandselective BDA 90dB 40/5W Document Number 55-199102HBKM Issue No.
4. UHF BANDSELECTIVE, BDA (55-199102) SUB MODULES 4.1. Bandpass Filter (02-010701) The bandpass filters are multi-section designs with a bandwidth dependent upon the passband frequencies, (both tuned to customer requirements). The response shape is basically Chebyshev with a passband design ripple of 0.1dB. The filters are of combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit.
4.2. 3dB Splitter/Combiner (05-002603) The 3dB Splitter/Combiner (05-002603) is a device for accurately matching two RF signals to a single port or splitting an RF signal to two ports whilst maintaining an accurate 50 Ω load to all inputs/outputs and ensuring that the VSWR and insertion losses are kept to a minimum.
4.4. 5 Watt Tetra Amplifier (12-021601) The power amplifier fitted to this unit is a multi-stage, solid state power amplifier. Class A circuitry is employed throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semi-conductor devices are very conservatively rated to ensure low device junction temperatures and a long, trouble free working lifetime. The power amplifier should require no maintenance over its operating life.
4.5. Linearised Power Amplifier (12-026901) The power amplifier fitted to (this unit) is a multi-stage, solid state power amplifier. Class A circuitry is employed throughout the device to ensure excellent linearity over a wide dynamic frequency range. All the semi-conductor devices are very conservatively rated to ensure low device junction temperatures and a long, trouble free working lifetime. The power amplifier should require no maintenance over its operating life.
4.6. Voltage Regulator Board 9.0V (13-001714) This unit it is used to derive a fixed voltage power supply rail from some higher voltage. In this instance it is used to derive 9V from a 12V input. The circuit is based upon a fixed voltage regulator, which is capable of supplying a maximum of 2.0 A output current. Note that at full output current the dissipation of the device must remain in limits, bearing in mind the voltage which is being dropped across it.
4.8. Bi-Directional Amplifier (17-017301) This module is a Bi-Directional Amplifier (up-link and down-link). All the amplifier stages are of balanced type and there is additionally digital attenuation, automatic level control (ALC) in the uplink path and also Current Fault Alarm Function circuitry, which indicates failure of each RF transistor in various ways – open collector, closed collector (TTL) and a relay to indicate the failure by voltage free change over contacts.
4.9. 12V (Single) Relay Board (80-008901) The General Purpose Relay Board allows the inversion of signals and the isolation of circuits. It is equipped with a single dual pole change-over relay RL1, with completely isolated wiring, accessed via a 15 way in-line connector. The relay is provided with polarity protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring circuits.
5. INSTALLATION & COMMISIONING 5.1. Antenna Installation & Gain Calculations 1 Most Cell Enhancer require two antennas, one a highly directional Yagi or similar directed towards the donor cell base station, and one a leaky feeder, omni-directional antenna or Yagi to cover the area in which the mobiles are to be served. 2 The maximum gain at which the Cell Enhancer can be set is limited by the isolation that can be achieved between these two antennas.
6. FAULT FINDING / MAINTENANCE 6.1. 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: 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. Test cable x 2: N male – N male, 2M long RG214.
6.3. 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.
6.8. 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. 6.9.
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 A.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 DC Downlink (D/L) FO GND ID LED LNA LPA MOU M.S. MTBF N/A N/C OFR OIP3 P1dB PA RF RSA RX S/N TX Uplink (U/L) VSWR WDM A Radio Frequency (RF) amplifier which can simultaneously amplify and re-broadcast Mobile Station (MS) and Base Transceiver Station (BTS) signals.
UHF Bandselective BDA 90dB 40/5W Document Number 55-199102HBKM Issue No. 1 F E D C B A Page 25 of 28 GD APPD 10/05/00 DATE RF 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED MB CHKD PL DRAWN RF FREQUENCY PROGRAMMING DATA B/W=30 to 200kHz 2 HI IN LOW OUT R.S.
A.3.
A.4. Amendment List Record Sheet Issue No. A Date 26/09/2007 Incorporated by AJS 1 05/10/2007 AJS Page Nos. Amended Reason for new issue Draft First Issue Document Ref. 55-199102HBKM UHF Bandselective BDA 90dB 40/5W Document Number 55-199102HBKM Issue No.
APPENDIX B Initial Equipment Set-Up Calculations General Information Site Name: Client Name: Date: 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 Downlink Calculations Parameter Input signal level (G) CE max.
