PBE Europe as Axell Wireless 55-2032SERIES 55-2032 Series Amplifier User Manual

Axell Wireless 55-2032 Series Amplifier

Manual

Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 1 of 23 SGC2111 FM Rebroadcast Amplifier User Handbook For System Consulting Group AWL Works Order Q117389 AWL Product Part No. 55-203201 AXELL WIRELESS UK Aerial House Asheridge Road Chesham, Buckinghamshire HP5 2QD, United Kingdom Tel: + 44 (0) 1494 777000 Fax: + 44 (0) 1494 777002 info@axellwireless.com www.axellwireless.com AXELL WIRELESS SWEDEN Box 7139 174 07 Sundbyberg Sweden Tel: + 46 (0) 8 475 4700 Fax: + 46 (0) 8 475 4799
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 2 of 23 Table of Contents 1. Introduction ............................................................................................................................. 3 1.1. Scope and Purpose of Document ..................................................................................... 3 1.2. Limitation of Liability Notice............................................................................................... 3 2. Safety Considerations ............................................................................................................. 4 2.1. Earthing of Equipment....................................................................................................... 4 2.2. Electric Shock Hazard....................................................................................................... 4 2.3. RF Radiation Hazard......................................................................................................... 4 2.4. Lifting and other Health and Safety Recommendations .................................................... 4 2.5. Chemical Hazard............................................................................................................... 5 2.6. Laser Safety ...................................................................................................................... 5 2.7. Emergency Contact Numbers ........................................................................................... 5 3. Equipment Overview ............................................................................................................... 6 3.1. 55-203201 System Schematic .......................................................................................... 7 3.2. 55-203201 Specification.................................................................................................... 8 3.3. 55-203201 List of Major Sub Components........................................................................ 8 3.4. Front View ......................................................................................................................... 9 3.5. Interior View .................................................................................................................... 10 4. Installation – General Notes.................................................................................................. 11 4.1. General Remarks ............................................................................................................ 11 4.2. Electrical Connections..................................................................................................... 11 4.3. RF Connections............................................................................................................... 11 4.3.1. Termination of Unused Ports....................................................................................... 11 4.4. Commissioning................................................................................................................ 12 5. Maintenance.......................................................................................................................... 13 5.1. Fault Finding.................................................................................................................... 13 5.1.1. Quick Fault Checklist................................................................................................... 13 5.1.2 Fault Isolation .............................................................................................................. 13 5.1.3. Downlink...................................................................................................................... 14 5.1.4. Checking service ......................................................................................................... 14 5.1.5. Fault repair .................................................................................................................. 14 5.1.6. Service Support........................................................................................................... 14 5.2. Tools & Test Equipment .................................................................................................. 15 5.3. Care of Modules.............................................................................................................. 15 5.3.1. General Comments ..................................................................................................... 15 5.3.2. LNA Replacement (general procedure)....................................................................... 15 5.3.3. Module Replacement (general procedure).................................................................. 15 5.3.4. Power Amplifier Replacement (general procedure) .................................................... 16 5.3.5. Low Power Amplifier Replacement (general procedure)............................................. 16 5.3.6. Module Transportation: ............................................................................................... 17 Appendix A...................................................................................................................................... 18 A.1. Glossary of Terms used in this document ....................................................................... 18 A.2. Key to Drawing Symbols used in this document ............................................................. 19 A.3. EC Declaration of Conformity.......................................................................................... 20 A.4. Waste Electrical and Electronic Equipment (WEEE) Notice ........................................... 21 A.5. Document Amendment Record ....................................................................................... 22 Appendix B...................................................................................................................................... 23 B.1 Initial Equipment Set-Up Calculations............................................................................. 23
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 3 of 23 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. AWL recommends that the installer of this equipment familiarise themselves with the safety and installation procedures contained within this document before installation commences. The purpose of this handbook is to provide the user/maintainer with sufficient information to service and repair the equipment to the level agreed. Maintenance and adjustments to any deeper level must be performed by AWL, normally at the company’s repair facility in Chesham, England. This handbook has been prepared in accordance with BS 4884, and AWL’s Quality procedures, which maintain the company’s registration to BS EN ISO 9001:2000 and to the R&TTE Directive of the European Parliament. Copies of the relevant certificates and the company Quality Manual can be supplied on application to the Operations Support Director (see section 2.7.). This document fulfils the relevant requirements of Article 6 of the R&TTE Directive. 1.2. Limitation of Liability Notice This manual is written for the use of technically competent operators/service persons. No liability is accepted by AWL for use or misuse of this manual, the information contained therein, or the consequences of any actions resulting from the use of the said information, including, but not limited to, descriptive, procedural, typographical, arithmetical, or listing errors. Furthermore, AWL does not warrant the absolute accuracy of the information contained within this manual, or its completeness, fitness for purpose, or scope. AWL has a policy of continuous product development and enhancement, and as such, reserves the right to amend, alter, update and generally change the contents, appearance and pertinence of this document without notice. All AWL products carry a twelve month warranty from date of shipment. The warranty is expressly on a return to base repair or exchange basis and the warranty cover does not extend to on-site repair or complete unit exchange.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 4 of 23 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. Electric Shock Hazard The risk of electrical shocks due to faulty mains driven power supplies whilst potentially ever present in any electrical equipment, would be minimised by adherence to good installation practice and thorough testing at the following stages: All test equipment must be in good working order prior to its use. High current power supplies can be dangerous because of the possibility of substantial arcing. Always switch off during disconnection and reconnection. 2.3. RF Radiation Hazard RF radiation, (especially at UHF frequencies) arising from transmitter outputs connected to AWL’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 un-terminated. Either of these conditions would impair the system’s efficiency. No investigation should be carried out until all RF power sources have been removed. This would always be a wise precaution, despite the severe mismatch between the impedance of an N type connector at 50, and that of free space at 377, which would severely mitigate against the efficient radiation of RF power. Radio frequency burns could also be a hazard, if any RF power carrying components were to be carelessly touched! Antenna positions should be chosen to comply with requirements (both local & statutory) regarding exposure of personnel to RF radiation. When connected to an antenna, the unit is capable of producing RF field strengths, which may exceed guideline safe values especially if used with antennas having appreciable gain. In this regard the use of directional antennas with backscreens and a strict site rule that personnel must remain behind the screen while the RF power is on, is strongly recommended. Where the equipment is used near power lines or in association with temporary masts not having lightning protection, the use of a safety earth connected to the case-earthing bolt is strongly advised. 2.4. Lifting and other Health and Safety Recommendations Certain items of AWL equipment are heavy and care should be taken when lifting them by hand. Ensure that a suitable number of personnel, appropriate lifting apparatus and appropriate personal protective equipment is used especially when installing Equipment above ground e.g. on a mast or pole and manual handling precautions relevant to items of the weight of the equipment being worked on must be observed at all times when handling, installing or dismounting this equipment. a) Original assembly. b) Commissioning. c) Regular intervals, thereafter.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 5 of 23 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). They are marked as hazardous in line with international regulations, but pose no threat under normal circumstances. Only if a component containing beryllium oxide has suffered catastrophic failure, or exploded, will there be any danger of the formation of dust. Any dust that has been created will be contained within the equipment module as long as the module remains sealed. For this reason, any module carrying the yellow and black danger sign should not be opened. If the equipment is suspected of failure, or is at the end of its life-cycle, it must be returned to Axell Wireless Ltd. for disposal. To return such equipment, please contact the Operations Support Department, who will give you a Returned Materials Authorisation (RMA) number. Please quote this number on the packing documents, and on all correspondence relating to the shipment. PolyTetraFluoroEthylene, (P.T.F.E.) and P.T.F.E. Composite Materials Many modules/components in AWL equipment contain P.T.F.E. as part of the RF insulation barrier. This material should never be heated to the point where smoke or fumes are evolved. Any person feeling drowsy after coming into contact with P.T.F.E. especially dust or fumes should seek medical attention. 2.6. Laser Safety General good working practices adapted from EN60825-2: 2004/ EC 60825-2:2004 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. They shall not be readily visible and sharp ends shall not be exposed. When using test cords, the optical power source shall be the last connected and the first disconnected; use only approved methods for cleaning and preparing optical fibres and optical connectors. Always keep optical connectors covered to avoid physical damage and do not allow any dirt/foreign material ingress on the optical connector bulkheads. The optical fibre jumper cable maximum bend radius is 3cm; any smaller radii may result in optical cable breakage or excessive transmission losses. Caution: The FO units are NOT weather proof. 2.7. Emergency Contact Numbers The AWL Operations Support Department can be contacted on: Telephone +44 (0)1494 777000 Fax. +44 (0)1494 777002 e-mail qa@axellwireless.com
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 6 of 23 3. Equipment Overview FM Rebroadcast Amplifier 55-203201 is built into a wall-mounted, environmentally protected (IP65) aluminium alloy case; 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 Power On and Alarm indicators on the outside of the door. The amplifier passes one VHF band, 88MHz to 108MHz in the Downlink direction only. The Downlink signal cable enters the Rebroadcast Amplifier case via the cable gland in the base of the case (annotated “E” in section 3.4.) and makes a connection to the BNC connector labelled “75 OHMS INPUT” (annotated “B” in section 3.5.). The signal passes through Impedance Matching Pad 98-000011 which changes the impedance from 75 to 50 and then passes through the “input” Bandpass Filter 01-004503 which is tuned to pass the Downlink bandwidth of 88MHz to 108MHz and to reject out-of-band noise. After leaving the filter the signal passes through Low Noise Amplifier 11-008802 and then passes through Variable Switched Attenuator 10-000701 (annotated “F” in section 3.5.) which can provide up to 30dB of signal attenuation (in 2dB steps) if required. The attenuator is controlled by the four toggle switches on the attenuator body; each switch is clearly marked with the attenuation it provides, and the total attenuation in-line is the sum of the values switched in. After passing through the attenuator the Downlink signal passes through Low Noise Amplifier 11-006002 and then into Hybrid Splitter/Coupler 05-000102 which splits the signal into two equal paths, each path then passes through a 20W Power Amplifier 12-028401 and then the two paths are recombined by a second Hybrid Splitter/Coupler 05-000102; the resultant signal then passes through a second Bandpass Filter 01-004503 to further reject out-of-band noise. The signal then passes through 30dB Directional Coupler 05-000316 which couples off a small portion of the signal which is passed through an Impedance Matching Pad 98-000011 which changes the impedance from 50 to 75 and then goes to a BNC monitor/test port for the Downlink output labelled “-30dB COUPLER” (annotated “P” in 5.3.). The main RF Downlink path after passing through 30dB Directional Coupler 05-000316 goes to the N type Port labelled “50 OHMS OUTPUT” (annotated “N” in 5.3.) and the Downlink output cable which connects to the output port exits the Rebroadcast Amplifier case via the cable gland in the top of the case (annotated “H” in section 3.4.).
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 7 of 23 3.1. 55-203201 System Schematic Drawing Number 55-203281
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 8 of 23 3.2. 55-203201 Specification Parameter Specification Downlink Passband 88 to 108 MHz Maximum Gain 60dB Passband Ripple < ±1.5dB Gain Adjustment 0 to 30dB in 2dB steps -30dB Coupler Port -30dB 1dB Compression Point + 44dBm 3rd Order Intercept Point + 54dBm In-Band Spurious Noise (30kHz BW) < -13dBm at max gain General Case Size (ex. handles and heatsinks) 620mm x 420mm x 250mm Case Material Aluminium Alloy (2mm) Case Finish Light Grey RAL7035 Semi-gloss AC Supply Voltage 110V RF Connectors N type female (50) BNC female (75) Alarms Fitted (summary volt-free contacts) Amplifiers Fail operation -20%C to +60%C Temperature Range storage -40%C to +70% Humidity 95% RHNC 3.3. 55-203201 List of Major Sub Components Component Part Component Part Description Qty Per Assembly 01-004503 Bandpass Filter 2 05-000102 Hybrid Splitter/Combiner 2 05-000316 30dB Directional Coupler 1 10-000701 Variable Switched Attenuator 0-30dB 1 11-006002 Low Noise Amplifier 1 11-008802 Low Noise Amplifier 1 12-028401 20W Power Amplifier 2 13-001803 Dual DC/DC Converter 24V-12V 1 80-008910 24V Relay PCB Assembly 1 96-300054 400W PSU Module 24V 17A 1 98-000011 Impedance Matching Pad 50/75 2
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 9 of 23 ALARMPOWER ONCAUTIONHot SurfaceDangerHigh VoltageCell EnhancerProduct Ref55-203201Made in UKCAUTIONHot SurfaceCAUTIONHot SurfaceA BCDEFFFFGH 3.4. Front View A Green LED “POWER ON” Illuminated during normal operation B Red LED “ALARM” illuminated during alarm condition C Lockable Door Handles D Lifting Handles E Cable glands for AC (110V) and RF input entry F Wall Mount Brackets G Earth connection H Cable glands for RF Output exit
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 10 of 23 3.5. Interior View A Cable glands for AC and RF input entry B RF Input port 75  BNC C Input Impedance Matching Pad 98-000011 (75 to 50) D Input Bandpass Filter 01-004503 E Low Noise Amplifier 11-008802 F Variable Switched Attenuator 10-000701 G Low Noise Amplifier 11-006002 H Hybrid Splitter/Combiner 05-000102 (splitting) I 20W Power Amplifier 12-028401 (1) J 20W Power Amplifier 12-028401 (2) K Hybrid Splitter/Combiner 05-000102 (combining) L Output Bandpass Filter 01-004503 M 30dB Directional Coupler 05-000316 N RF Output port 50  N type O Monitor Impedance Matching Pad 98-000011 (50 to 75) P 30dB monitor port for RF output 75 BNC Q AC Mains (110V) input terminal block R AC Mains trip switch S 400W PSU Module 24V 17A 96-300054 T Dual DC/DC Converter 24V-12V 13-001803 U 24V Relay PCB Assembly 80-008910 V Krone terminal block for alarm output
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 11 of 23 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. The procedure for installing and commissioning an Axell Wall Mount Repeater is generally as follows: 1) Secure the Repeater in the chosen wall position. 2) Connect the input and output cables to the relevant Amplifier ports. 3) Connect a suitable mains power supply to the Amplifier 4) Switch the equipment mains on with the small switch located inside the Amplifier on the lower right hand side of the case. 5) If Base Station RF is available, make test calls via the Amplifier to ensure correct operation, if possible monitoring the signal levels during these calls to ensure that the uplink and downlink RF levels are as anticipated. 4.2. Electrical Connections It is recommended that the electrical mains connection is made by a qualified electrician, who must be satisfied that the supply will be the correct voltage and of sufficient capacity. All electrical and RF connections should be completed and checked prior to power being applied for the first time. Ensure that connections are kept clean and are fully tightened. 4.3. RF Connections Care must be taken to ensure that the correct connections are made with particular attention made to the RF input and output ports. In the event that the base transmitter is connected to the output of the equipment, damage to the equipment will be done if the base station transmitter is then keyed. Ensure that connections are kept clean and are fully tightened. 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.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 12 of 23 4.4. Commissioning Once all connections are made the equipment is ready for commissioning. To commission the system the test equipment detailed in Section 5.2. will be required. Using the system diagrams and the end-to-end test specification (supplied with the equipment), the equipment should be tested to ensure correct operation. On initial power up the system alarm indicators on the front door of the equipment should be checked. A green LED on each unit with a power supply to it illuminates to indicate that the power supply is connected to the unit A red LED illuminated indicates a fault in that particular unit that must be investigated before proceeding with the commissioning. In the event that any part of the system does not function correctly as expected, check all connections to ensure that they are to the correct port, that the interconnecting cables are not faulty and that they are tightened. The majority of commissioning difficulties arise from problems with the interconnecting cables and connectors.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 13 of 23 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. Below are listed some common problems which have resulted in poor performance or an indicated non-functioning of the equipment. • Mains power not connected or not switched on. • External connectors not fitted or incorrectly fitted. • Internal connectors becoming loose due to transport vibration. • Wiring becoming detached as a result of heavy handling. • Input signals not present due to faults in the antenna and feeder system. • Base transmissions not present due to fault at the base station. • Modems fitted with incorrect software configuration. • Changes to channel frequencies and inhibiting channels. • Hand held radio equipment not set to repeater channels. • Hand held radio equipment not set to correct base station. 5.1.2 Fault Isolation 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. The System consists of modules fitted in a wall mounted, environmentally protected enclosure. 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. The return signal path from the mobile radio equipment to the base station is referred to as the uplink. The first operation is to check the alarms of each of the active units and determine that the power supplies to the equipment are connected and active. This can be achieved remotely (via CEMS, the RS232 Coverage Enhancement Management System, if fitted), or locally with the front door LED’s. The green LED on the front door should be illuminated, while the red alarm indicator should be off. If an Alarm is on, then that unit must be tested against the original test specification. If an amplifier is suspect, check the DC power supply to the unit. If no other fault is apparent use a spectrum analyser to measure the incoming signal level at the input and then after reconnecting the amplifier input, measure the output level. Consult with the system diagram to determine the expected gain and compare result. In the event that there are no alarms on and all units appear to be functioning it will be necessary to test the system in a systematic manner to confirm correct operation.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 14 of 23 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. The expected downlink output for the given input can be found in the end-to-end test specification. 5.1.4. 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. 5.1.5. 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. The repair of component modules such as amplifiers and bandpass filters will not usually be possible in the field, as they frequently require specialist knowledge and test equipment to ensure correct operation. It is recommended that items of this type are replaced with a spare unit and the faulty unit returned to Axell Wireless for repair. 5.1.6. Service Support Advice and assistance with maintaining and servicing this system are available by contacting Axell Wireless Ltd., see section 2.7. NOTE Individual modules are not intended to be repaired on site and attempts at repair will invalidate active warranties. Company policy is that individual modules should be repaired by replacement. Axell Wireless Ltd. maintains a level of stock of most modules which can usually be despatched at short notice to support this policy.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 15 of 23 5.2. Tools & Test Equipment The minimum tools and test equipment needed to successfully service this Axell Wireless product are as follows:- Spectrum analyser 100kHz to 2GHz (Dynamic range = 90dB). Signal Generator 30MHz to 2GHz (-120dBm to 0dBm o/p level). Attenuator 20dB, 10W, DC-2GHz, (N male – N female). Test Antenna Yagi or dipole for operating frequency. Optical Power Meter 1300 – 1560nM (-40 - +10dB) Digital multi-meter Universal Volt-Ohm-Amp meter. Test cable x 2 N male – N male, 2M long RG214. Test cable x 2 SMA male – N male, 1m long RG223. Hand tools Philips #1&2 tip screwdriver. 3mm flat bladed screwdriver. SMA spanner and torque setter. 5.3. Care of Modules 5.3.1. 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 and inserted with care. The module may have connectors on its underside, which might not be visible to the service operative. 5.3.2. LNA Replacement (general procedure) The following general instructions should be followed to remove a module: 1) Remove power to the unit 2) Remove all visible connectors (RF, DC & alarm) 3) Release module retaining screws. 4) Slowly but firmly, pull the module straight out of its position. Take care not to twist/turn the module during withdrawal. (When the module is loose, care may be needed, as there may be concealed connections underneath). 5.3.3. Module Replacement (general procedure) 1) Carefully align the module into its location then slowly push the module directly straight into its position, taking care not to twist/turn it during insertion. 2) Reconnect all connectors, RF, alarm, power etc., (concealed connectors may have to be connected first). 3) Replace retaining screws (if any). 4) Double-check all connections before applying power.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 16 of 23 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. 4) There is (usually) a plate attached to the alarm board which fixes it to the amplifier, remove its retaining screws and the alarm board can be withdrawn from the amplifier in its entirety. On certain types of amplifier the alarm board is not mounted on a dedicated mounting plate; in this case it will have to firstly be removed by unscrewing it from the mounting pillars, in most cases, the pillars will not have to be removed before lifting the amplifier. 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., against a wall in the case of wall mounted enclosures), then the fixing method for the heatsink will be from within the case, (otherwise the enclosure would have to be removed from the wall in order to remove the heatsink). 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. 5.3.5. Low Power Amplifier Replacement (general procedure) • 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. • Remove the alarm monitoring wires from (D type connector) pins 9 and 10. • 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. • Reconnect the DC supply connector and turn the mains switch on. Note: Tighten SMA connectors using only a dedicated SMA torque spanner. If SMA connectors are over-tightened, irreparable damage will occur. Do not use adjustable pliers to loosen/tighten SMA connectors. Also take care not to drop or knock the module as this can damage (or misalign in the case of tuned passive modules) sensitive internal components. Always store the modules in an environmentally friendly location
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 17 of 23 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. Please contact the Axell Wireless Operations Support Department before returning a module, see section 2.7.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 18 of 23 Appendix A A.1. Glossary of Terms used in this document 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. AC Alternating Current AGC Automatic Gain Control BBU Battery Backup Unit BTS Base Transceiver Station (Base Station) B/W Bandwidth CEMS Coverage Enhanced Management System C/NR Carrier-to-Noise Ratio DC Direct Current Downlink (D/L) RF signals TX from the BTS to the Mobiles FO Fibre Optic GND Ground ID Identification Number LCX Leaky Coaxial Cable (Leaky Feeder). LED Light Emitting Diode LNA Low Noise Amplifier LPA Low Power Amplifier Mobile(s) Hand-portable or other “Mobile” RF Tranceiver equipment. MOU Master Optical Unit MTBF Mean Time Between Failures N/A Not Applicable N/C (of Relays) Normally Closed N/O (of Relays) Normally Open OFR On Frequency Repeater OIP3 Output Third Order Intercept Point P1dB 1dB Compression Point PA Power Amplifier RF Radio Frequency RSA Receiver/Splitter Amplifier RX Receiver (Received) S/N Serial Number TX Transmitter (Transmitted) Uplink (U/L) RF signals transmitted from the Mobiles to the BTS VSWR Voltage Standing Wave Ratio WDM Wave division multiplex Date Format Date Format used in this document is: dd/mm/yyyy
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 19 of 23 A.2. Key to Drawing Symbols used in this document
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 20 of 23 A.3. EC Declaration of Conformity In accordance with BS EN ISO/IEC 17050-1&-2:2004 Axell Wireless Limited Aerial House Asheridge Road Chesham Buckinghamshire HP5 2QD United Kingdom DECLARES, UNDER OUR SOLE RESPONSIBILITY THAT THE FOLLOWING PRODUCT: PRODUCT PART NO[S] 55-203201HBK PRODUCT DESCRIPTION FM Rebroadcast Amplifier IN ACCORDANCE WITH THE FOLLOWING DIRECTIVES: 1999/5/EC The Radio & Telecommunications Terminal Equipment Directive Annex V and its amending directives HAS BEEN DESIGNED AND MANUFACTURED TO THE FOLLOWING STANDARD[S] OR OTHER NORMATIVE DOCUMENT[S]: BS EN 60950 Information technology equipment. Safety. General requirements ETS EN 301 489-1 EMC standard for radio equipment and services. Part 1. Common technical requirements I hereby declare that the equipment named above has been designed to comply with the relevant sections of the above referenced specifications. The unit complies with all essential requirements of the Directives. SIGNED B. S. Barton Operations Director DATE: 31/07/2008 Registered Office: Aerial House, Asheridge Road, Chesham, Buckinghamshire, HP5 2QD England Registered No. 4042808 (England) www.axellwireless.com
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 21 of 23 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. As part of the legislation, electrical and electronic equipment will feature the crossed out wheeled bin symbol (see image at left) on the product or in the documentation to show that these products must be disposed of in accordance with the WEEE Directive. In the European Union, this label indicates that this product should not be disposed of with domestic or "ordinary" waste. It should be deposited at an appropriate facility to enable recovery and recycling.
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 22 of 23 A.5. Document Amendment Record Issue No. Date Incorporated by Section Amended Reason for new issue A 16/12/2008 AJS Draft 1 22/12/2008 AJS Issue
Axell Wireless Limited Technical Literature FM Rebroadcast Amplifier 55-203201 Document Number 55-203201HBK Issue No. 1 Date 22/12/2008 Page 23 of 23 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 A - Service Antenna B – Donor Antenna Type Loss Length Comments C – Service Feeder D – Donor Feeder Initial Parameters E – CE Output Power dBmF – Antenna Isolation dBG – Input signal level from donor BTS dBmOperating Voltage V Downlink Calculations Parameter Comments Value Input signal level (G) dBmCE max. o/p power (E) dBmGain setting E - G dBIsolation required (Gain + 10dB) dBService antenna gain (A) dBService antenna feeder loss (C) dBEffective radiated power (ERP) E+A-C dBmAttenuator setting CE gain-gain setting dB If the input signal level in the uplink path is known and steady, use the following calculation table to determine the gain setting. If the CE features Automatic Gain Control the attenuator should be set to zero and if not, then the attenuation setting for both uplink and downlink should be similar. Uplink Calculations Parameter Comments Value Input signal level dBmCE max. o/p power (E) dBmGain setting dBRequired isolation dBDonor antenna gain (B) dBDonor antenna feeder loss (D) dBEffective radiated power (ERP) E+B-D dBmAttenuator setting (CE gain-gain setting) dB

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