PBE Europe as Axell Wireless 50-1185900 Tunnel radio downlink 900MHz amplifier User Manual Weehawken 900

Axell Wireless Tunnel radio downlink 900MHz amplifier Weehawken 900

User manual

Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-1 of 50 Weehawken Tunnel Radio Repeater System User/Maintenance Handbook For G.E Transport Systems AFL Works Order N.: Q112727 AFL product part N.’s: 50-118501 (2 Ch 900MHz Pager) 80-231302 (800MHz Power Supply) 80-231303 (Alarm System)
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-2 of 50 Table of Contents INTRODUCTION ............................................................................................................................................5 Scope................................................................................................................................................................................ 5 Purpose............................................................................................................................................................................ 5 EC DECLARATION OF CONFORMITY.................................................................................................................. 6 Glossary of Terms .......................................................................................................................................................... 7 Key to AFL RF Module Drawing Symbols.................................................................................................................. 8 1. SAFETY CONSIDERATIONS ............................................................................................................9 1.1 Earthing of Equipment ..................................................................................................................................... 9 1.2 Electric Shock Hazard ......................................................................................................................................9 1.3 RF Radiation Hazard...................................................................................................................................... 10 1.4 Chemical Hazard............................................................................................................................................. 11 1.5 Emergency Contact Numbers ........................................................................................................................ 11 2. OVERVIEW/ SYSTEM DESCRIPTION..........................................................................................12 2.1 General System Description ........................................................................................................................... 12 3. WEEHAWKEN RACK DRAWINGS................................................................................................13 3.1 Rack 3...............................................................................................................................................................13 3.1.1 Pager/800MHz Rack System Diagram, Drg. Nō. 80-231483 ....................................................................... 13 3.1.2 Rack 3 Layout and Interconnections Diagram, Drg. Nō. 80-231454 ...........................................................14 3.1.3 Rack to Rack Interconnections Diagram, Drg. Nō. 80-231455 .................................................................... 15 3.1.4 Power Distribution Sketch ............................................................................................................................16 3.2 Weehawken System Frequencies Look-up Table......................................................................................... 17 4. DOWNLINK PAGING AMPLIFIER................................................................................................18 4.1 Two Channel 900MHz Pager Cell Enhancer (50-118501)...........................................................................18 4.1.1 Two Channel 900MHz Pager Cell Enhancer Description............................................................................ 18 4.1.2 Two Channel 900MHz Pager Cell Enhancer Technical Specification ......................................................... 18 4.1.3 Two Channel 900MHz Pager System Diagram, Drg. Nō. 50-118581.......................................................... 19 4.1.4 Two Channel 900MHz Pager Cell Enhancer Outline Drawing.................................................................... 20 4.1.5 Two Channel 900MHz Pager Cell Enhancer Parts List ...............................................................................21 5. POWER SUPPLIES & ALARMS ......................................................................................................22 5.1 800MHz Power Supply (80-231302) .............................................................................................................. 22 5.1.1 800MHz Power Supply Description.............................................................................................................. 22 5.1.2 800MHz Power Supply Technical Specification ........................................................................................... 22 5.1.3 800MHz Power Supply System Diagram ...................................................................................................... 22 5.1.4 800MHz Power Supply Outline Drawing, Drg. Nō. 80-231392 ...................................................................23 5.1.5 800MHz Power Supply Parts List ................................................................................................................. 24 5.2 Alarm/Monitor Shelf (80-231303).................................................................................................................. 25 5.2.1 Alarm/Monitor Shelf Description..................................................................................................................25 5.2.2 Alarm/Monitor Shelf Technical Specification ............................................................................................... 25 5.2.3 Alarm/Monitor Shelf Parts List ..................................................................................................................... 26 6. SUB-UNIT MODULES .......................................................................................................................27 6.1 Bandpass Filter (02-004502)........................................................................................................................... 27 6.1.1 Description.................................................................................................................................................... 27 6.1.2 Technical Specification ................................................................................................................................. 27 6.2 Bandpass Filter (02-007206)........................................................................................................................... 28 6.2.1 Description.................................................................................................................................................... 28 6.2.2 Technical Specification ................................................................................................................................. 28 6.3 900MHz Splitter/Combiner (05-002602)....................................................................................................... 29 6.3.1 Description.................................................................................................................................................... 29 6.3.2 Technical Specification ................................................................................................................................. 29 6.4 ¼Watt 0- -30 & Switched Attenuator (10-000701)....................................................................................... 30 6.4.1 General Application ......................................................................................................................................30
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-3 of 50 6.4.2 Switched Attenuators..................................................................................................................................... 30 6.5 Low Noise Amplifier (11-005902) .................................................................................................................. 31 6.5.1 Description.................................................................................................................................................... 31 6.5.2 Technical Specification ................................................................................................................................. 31 6.5.3 LNA ‘D’ Connector Pin-out details ..............................................................................................................31 6.6 Low Noise Amplifier (11-006702) .................................................................................................................. 32 6.6.1 Description.................................................................................................................................................... 32 6.6.2 Technical Specification ................................................................................................................................. 32 6.6.3 LNA ‘D’ Connector Pin-out details ..............................................................................................................32 6.7 20W Power Amplifier (12-018002) ................................................................................................................ 33 6.7.1 Description.................................................................................................................................................... 33 6.7.2 Technical Specification ................................................................................................................................. 33 6.7.3 PA 7-Way Connector Pin-outs ...................................................................................................................... 33 6.8 D.I.P Channel Control Module (17-002101) ................................................................................................. 34 6.8.1 Description.................................................................................................................................................... 34 6.8.2 Programming Procedure ..............................................................................................................................35 6.8.3 12.5kHz step size switch functions ................................................................................................................35 6.8.4 25kHz step size switch functions ...................................................................................................................36 6.8.5 Programming Example .................................................................................................................................36 6.8.6 17-002101 Controller Module DIP Switch Connector Data ........................................................................ 37 6.8.7 Drg. Nō. 17-002190, DIP Switch Module Controller Outline Drawing....................................................... 38 6.9 Channel Selective Modules (17-003033, 17-009143, 17-009127 & 17-010803)........................................... 39 6.9.1 Description.................................................................................................................................................... 39 6.9.2 Drg. Nō. 17-003080, Generic Channel Module Block Diagram ..................................................................40 6.10 12 & 24V Relay Boards (20-001601 & 20-001602)....................................................................................... 41 6.10.1 Description................................................................................................................................................ 41 6.10.2 Technical Specification ............................................................................................................................. 41 6.11 12 & 24V Single Relay Board (80-008901 & 80-008902) .............................................................................42 6.11.1 Description................................................................................................................................................ 42 6.12 JWS150-12/A PSU (96-300052)...................................................................................................................... 42 6.12.1 Description................................................................................................................................................ 42 6.12.2 Technical Specification ............................................................................................................................. 42 7. INSTALLATION.................................................................................................................................43 7.1 General Remarks ............................................................................................................................................ 43 7.2 RF Connections ............................................................................................................................................... 44 7.3 Commissioning ................................................................................................................................................ 44 8. MAINTENANCE.................................................................................................................................45 8.1 Fault Finding ................................................................................................................................................... 45 8.1.1 Quick Fault Checklist....................................................................................................................................45 8.1.2 Fault Isolation............................................................................................................................................... 45 8.1.3 Downlink .......................................................................................................................................................46 8.1.4 Uplink............................................................................................................................................................46 8.1.5 Checking service ...........................................................................................................................................46 8.1.6 Fault repair ................................................................................................................................................... 47 8.1.7 Service Support .............................................................................................................................................47 8.2 Tools & Test Equipment................................................................................................................................. 47 8.3 Care of Modules .............................................................................................................................................. 48 8.3.1 General Comments........................................................................................................................................48 8.3.2 Module Removal (LNA’s, general procedure):............................................................................................. 48 8.3.3 Module Replacement (general):....................................................................................................................48 8.3.4 Power Amplifiers...........................................................................................................................................48 8.3.5 Low Power Amplifier Replacement............................................................................................................... 49 8.3.6 Module Transportation: ................................................................................................................................ 49 APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS ....................................................50
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-4 of 50 AMENDMENT LIST RECORD SHEET Issue Nō. Date Incorporated by Page No.’s Amended Reason for new issue A 05/09/2005 CMH 1st Draft Document Ref:-Weehawken_900
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-5 of 50 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. Maintenance and adjustments to any deeper level must be performed by AFL, normally at the company’s repair facility in Chesham, England. This handbook has been prepared in accordance with BS 4884, and AFL’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 Quality Manager. This document fulfils the relevant requirements of Article 6 of the R&TTE Directive. Limitation of Information Notice This manual is written for the use of technically competent operators/service persons. No liability is accepted by AFL 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, AFL does not warrant the absolute accuracy of the information contained within this manual, or it’s completeness, fitness for purpose, or scope. AFL 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 AFL 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.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-6 of 50 EC DECLARATION OF CONFORMITY In accordance with BS EN ISO/IEC 17050-1&-2:2004 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] 50-118501 PRODUCT DESCRIPTION Weehawken tunnel 900MHz pager system 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 TECHNICAL DIRECTOR DATE: 08/11/2005 0086
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-7 of 50 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. AC Alternating Current AGC Automatic Gain Control BBU Battery Backup Unit BTS Base Transceiver Station 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 Master Site FO Fibre Optic GND Ground ID Identification Number LED Light Emitting Diode LNA Low Noise Amplifier LPA Low Power Amplifier MOU Master Optical Unit M.S. Mobile Station MTBF Mean Time Between Failures N/A Not Applicable N/C No Connection OFR On Frequency Repeater OIP3 Output Third Order Intercept Point = RFout +(C/I)/2 PA Power Amplifier RF Radio Frequency RSA Receiver/Splitter Amplifier Rx Receiver S/N Serial Number Tx Transmitter Uplink (U/L) RF signals transmitted from the MS to the BTS VSWR Voltage Standing Wave Ratio WDM Wave division multiplex
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-8 of 50 Key to AFL RF Module Drawing Symbols
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-9 of 50 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. 1.2 Electric Shock Hazard Electrical shocks due to faulty mains driven power supplies. Whilst ever potentially present in any electrical equipment, such a condition would be minimised by quality installation practice and thorough testing at: a) Original assembly b) Commissioning c) Regular intervals, thereafter. All test equipment to 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.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-10 of 50 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. 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.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-11 of 50 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). 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 Aerial Facilities Ltd for disposal. To return such equipment, please contact the Quality 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 AFL 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. 1.5 Emergency Contact Numbers The AFL Quality Department can be contacted on: Telephone +44 (0)1494 777000 Fax +44 (0)1494 777002 e-mail qa@aerial.co.uk
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-12 of 50 2. OVERVIEW/ SYSTEM DESCRIPTION 2.1 General System Description The Weehawken tunnel radio system is designed to amplify various bands of radio frequencies, in either channelised or band selective modes. All the hardware is built into standard 19” rack mounted cabinets which have an environmental IP rating of 54. There is also a single, free standing wall mounted amplifier which carries the whole signal network to the River Portal area. The system in this document will be described separately, as individual shelves (900MHz Pager) and the various passive combiners, splitters and cross-band coupler shelves will also be described in separate documents. Every active module in the entire system has a dedicated alarm and these are series wired within the shelves to a relay which gives a volt-free output pair for each shelf which is wired to a ‘krone-block’ termination in the rack cabinet.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-13 of 50 3. WEEHAWKEN RACK DRAWINGS 3.1 Rack 3 3.1.1 Pager/800MHz Rack System Diagram, Drg. N. 80-231483
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-14 of 50 3.1.2 Rack 3 Layout and Interconnections Diagram, Drg. N. 80-231454
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-15 of 50 3.1.3 Rack to Rack Interconnections Diagram, Drg. N. 80-231455
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-16 of 50 3.1.4 Power Distribution Sketch ABCDEFGHKJABCDEFGHKJACBDACBDACBDACBDACBDACBDACBDABCDABCDABCDEFGHKJABCDEFGHKJABCDONOFF+++110/ 230V A C+++ABDCEFACBDACBDABCDABCDABCDABCDONOFFONOFFONOFFONOFFBDFACEGONOFF++++++ONOFF+++110/ 230V A CACB110/ 230V A CONOFFONOFFABABCDOUTINOUTINO UT O UT IN IN115VSupply 115VSupply 115VSupply115V From Rack 1 115V to Rack 224V Supply Leads24V Inputs 24V Outputs12V Inputs12V OutputsAlarms Alarms Alarms Alarms12V DC Isolation
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-17 of 50 3.2 Weehawken System Frequencies Look-up Table Agency Channel Number Uplink Tx Downlink Rx New Jersey Transit Paging 900 CHN 1 929.5875 New Jersey Transit Paging 900 CHN 2 929.6125
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-18 of 50 4. DOWNLINK PAGING AMPLIFIER 4.1 Two Channel 900MHz Pager Cell Enhancer (50-118501) 4.1.1 Two Channel 900MHz Pager Cell Enhancer Description The pager cell enhancer provides two channels (downlink only) in the 900MHz band for the NJ Transit system. These two frequencies are relayed to all the sites (leaky feeders) in the system. All amplifiers have built-in alarms which are configured as a summary, volt-free relay contact pair terminating at pins 1 & 2 on the ‘D’ type alarm connector. 4.1.2 Two Channel 900MHz Pager Cell Enhancer Technical Specification PARAMETER SPECIFICATION 929.5875MHz (Downlink) Frequencies: 929.6125MHz (Downlink) Gain: >90dB Gain Adjustment: 0 - 30dB (in 2dB steps) Shelf size: 4U Uplink Power: >1.0Watts Maximum uplink output: +30.8dBm Downlink Power: >5.0Watts Maximum downlink output power: +37.5dBm Uplink +44dBm IP3: Downlink +50dBm Downlink Ch. module AGC level: -17dBm Uplink Ch. module AGC level: -8dBm Noise Figure: <6dB (at maximum gain) AGC: Fitted in channel modules VSWR: better than 1.5:1 RF Connectors: N type, female operational: -10°C to +55°C Temperature range: storage: -40°C to +70°C Case: Alocrom 1200 Heatsinks: Matt black Handles: Silver anodised alloy Finish: Fascia: Painted to RAL 7035 1 Downlink amplifiers 2 Uplink amplifiers Alarms Fitted: (volt-free contacts/TTL) 3 Each channel module
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-19 of 50 4.1.3 Two Channel 900MHz Pager System Diagram, Drg. N. 50-118581
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-20 of 50 4.1.4 Two Channel 900MHz Pager Cell Enhancer Outline Drawing
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-21 of 50 4.1.5 Two Channel 900MHz Pager Cell Enhancer Parts List 02-004502 4P C/L SD FILTER 920MHz (3MHz B/W) SMA 2 02-007206 900MHz 8POLE 15-25MHz B/W "SMA" 1 05-002602 900MHz SPLITTER/COMBINER, 20W 2 10-000701 1/4W0-30dB SWITCHED ATTENUATOR 1 11-005902 900MHz LOW NOISE AMP WITH RELAY ASS 1 11-006702 GA 800-1000MHz LNA 29dB (WITH RELAY) 2 12-018601 POWER AMPLIFIER 900MHz 5W 1 17-002101 CHANNEL CONTROL MODULE 2 17-002103 26WAY RIBBON CABLE LEAD 2 17-009142 CHAN MOD 910-935MHz 15KHz 8p TCXO 2 19-001021K 4U CHASSIS KIT (400mm deep) 1 20-001601 12V RELAY BOARD 1 80-008901 12V RELAY PCB ASSEMBLY 1 80-063920 HEATSINK 2U ASS140 (5W) 1 91-030002 N ADAPTOR PANEL FEMALE:FEMALE 3 91-130001 SMA ADAPT 'T' ALL FEMALE 3 GHz 1 91-520001 PWR MAINS INL FIXED/SOLD.TERMS 1 91-520005 MAINS LEAD 1 91-520010 MAINS RETAINING CLIP 1 91-600007 'D' 9 WAY BLACK SHELL 3 91-600014 'D' 9 WAY SOCKET S/B (NON FILTERED) 3 91-600015 'D' 9 WAY PLUG S/B (NON FILTERED) 1 91-660001 2W5 MIXED D TYPE SOCKET (7 WAY) 1 96-300052 JWS150-12/A PSU 1 96-600001 INSULATING BOOT LARGE 1 96-700034 LED RED 5mm IP67 1 96-700035 LED GREEN 5mm IP67 1 96-900017 AC TRIP SWITCH (3 AMP M.C.B.) 1
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-22 of 50 5. POWER SUPPLIES & ALARMS 5.1 800MHz Power Supply (80-231302) 5.1.1 800MHz Power Supply Description The power supply for the 800MHz cell enhancer uses 15V PSU modules ‘turned down’ to 12V (all the amplifiers in the 800MHz CE use 12V DC supply). It is a standard power supply shelf using two PSU modules with their outputs combined through power diodes and terminating in six, dedicated 12V outputs. Failure of either PSU module will trigger a non-latching summary alarm, (short-term mains failures will allow the system to return to a ‘non-alarmed’ state). The alarm interface is on the alarm ‘D’ connector pins 1 & 2. 5.1.2 800MHz Power Supply Technical Specification PARAMETER SPECIFICATION Input: 110V AC @50/60Hz (single port) Outputs: 6 x 12V DC @ 20A each Front panel indicators: (x 2) Green LED for ‘PSU1/PSU2 ON’’ Fuses 1 x 20A each outlet socket DC Socket XLR operational: -10°C to +55°C Temperature range storage: -40ºC to +70ºC Alarmed devices: Either PSU failure Alarm interface (volt-free contacts): ‘D’ type alarm connector, pins 1 & 2 MTBF: >50,000 hours Earthing: M8 stud 5.1.3 800MHz Power Supply System Diagram The system diagram is not available at the time of writing this document.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-23 of 50 5.1.4 800MHz Power Supply Outline Drawing, Drg. N. 80-231392
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-24 of 50 5.1.5 800MHz Power Supply Parts List AFL Part Nō. Part Description Qty.13-003301 MAINS FILTER 8AMP ASSEMBLY 1 20-001601 12V RELAY BOARD 1 80-008920 DUAL PSU HEATSINK 2 80-008921 DUAL PSU CASE 1 80-008922 DUAL PSU LID 1 80-008925 DUAL PSU FRONT PANEL 1 80-020632 2U CHASSIS LID FIXING RAIL 4 91-500025 3 PIN RIGHT ANGLE FREE PLUG NC-X 6 91-510004 3 PIN PNL.MOUNT SOCKET NC-X 6 91-510035 3 WAY MATE N LOK PLUG HOUSING 2 91-520001 PWR MAINS INL FIXED/SOLD.TERMS 1 91-520005 MAINS LEAD 1 91-520010 MAINS RETAINING CLIP 1 91-520032 MATE N LOK SOCKET CONTACT 20/14 AWG 6 91-600015 'D' 9 WAY PLUG S/B (NON FILTERED) 1 91-800014 3 WAY TERMINAL BLOCK 1 91-800015 TRIPLE DECK TERMINAL BLOCK 8 91-800016 TRIPLE DECK TERMINAL JUMPER 6 91-800017 TRIPLE DECK TERMINAL END 1 91-800028 DIN RAIL END-STOP 2 91-800031 SYMETRIC 35 x 7.5mm DIN RAIL 0 92-900014 DIN RAIL (TOP HAT) EARTH CLAMP M5 1 93-510077 0R02 50W RESISTOR ALUMINIUM CLAD 2 94-100004 STPS12045TV 60A DUAL DIODE 1 95-100007 TX.FERRITE ISOL.HT.SINK B/ANOD 3 96-110034 FUSE HOLDER 16-30A, 32mm BODY ONLY 4 96-110064 FUSE HOLDER 16-30A, 32mm INSERT 4 96-300057 15V 27A PSU 400W (XP BCC) 2 96-600001 INSULATING BOOT LARGE 1 96-700034 LED RED 5mm IP67 1 96-700035 LED GREEN 5mm IP67 2 96-920023 5A CIRCUIT BREAKER (ETA) 2 97-400002 HANDLE TYPE H6803 4U.[ALLOY] 2
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-25 of 50 5.2 Alarm/Monitor Shelf (80-231303) 5.2.1 Alarm/Monitor Shelf Description The alarm shelf acts as an alarm concentrator for all the alarms in the system. Firstly, within each shelf containing active components, the individually alarmed modules are ‘summed’ and presented to that shelves’ 9-way alarm connector as a volt-free relay contact pair. These alarm contact pairs are wired to the krone block in the lower rack space and from there the pairs are presented to the alarm shelf. At the alarm shelf the pairs are summed together to form an overall system alarm. In this way a system alarm may be broken down to scrutinise the shelf alarm and ultimately to the individual modules’ alarms. This shelf has its own dedicated mains-driven power 12V DC supply. As all the alarms in the system are ‘held closed loops’, should any power supply fail, the main system alarm will be triggered. 5.2.2 Alarm/Monitor Shelf Technical Specification PARAMETER SPECIFICATION Operating voltage: 12V (floating earth) Alarm output relay contacts: Max. switch current: 1.0Amp Max. switch volts: 120Vdc/60VA Max. switch power: 24W/60VA Min. switch load: 10.0µA/10.0mV Relay isolation: 1.5kV Mechanical life: >2x107 operations Relay approval: BT type 56 Connector details: 25 Way ‘D’ Connector operational: :-10°C to +55°C Temperature range storage: :-40°C to +70°C
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-26 of 50 5.2.3 Alarm/Monitor Shelf Parts List AFL Part Nō. Part Description Qty.19-000724 1U 19" UNIT FRONT PANEL FAB 1 19-000725 1U 19" UNIT 400 DEEP CHASSIS + BKT 1 19-000826 2U,3U,4U 19" UNIT 400 DEEP LID 1 20-001601 12V RELAY BOARD 4 91-520003 POWER SWITCHD/FUSED MAINS INL. 1 91-520005 MAINS LEAD 1 91-520010 MAINS RETAINING CLIP 1 91-600014 'D' 9 WAY SOCKET S/B (NON FILTERED) 8 91-600015 'D' 9 WAY PLUG S/B (NON FILTERED) 8 96-300072 12V POWER SUPPLY TML15112C 1 96-600001 INSULATING BOOT LARGE 1 96-700034 LED RED 5mm IP67 8 96-700035 LED GREEN 5mm IP67 1
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-27 of 50 6. SUB-UNIT MODULES Note that the sub unit modules are tabled in part number order – the modules pertinent to any particular shelf will be found in the parts list under the heading of that shelf. 6.1 Bandpass Filter (02-004502) 6.1.1 Description 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 slot coupled, folded combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit. The tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR figure and 50 load at the input and output ports. Being passive devices, the bandpass filters should have an extremely long operational life and require no maintenance. Should a filter be suspect, it is usually most time efficient to replace the module rather than attempt repair or re-tuning. No adjustments should be attempted without full network sweep analysis facilities to monitor both insertion loss and VSWR simultaneously. 6.1.2 Technical Specification PARAMETER SPECIFICATION Response Type Chebyshev Frequency: 920MHz (tuned to spec.) Bandwidth: 3MHz (tuned to spec.) Number of Sections: 5 Insertion Loss: 1.2 dB VSWR: better than 1.2:1 Connectors: SMA female Power Handling: 100W max operation: -10°C to +60°C Temperature range: storage: -20°C to +70°C Weight: 3 kg (typical)
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-28 of 50 6.2 Bandpass Filter (02-007206) 6.2.1 Description 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 slot coupled, folded combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit. The tuned elements are silver-plated to reduce surface ohmic losses and maintain a good VSWR figure and 50 load at the input and output ports. Being passive devices, the bandpass filters should have an extremely long operational life and require no maintenance. Should a filter be suspect, it is usually most time efficient to replace the module rather than attempt repair or re-tuning. No adjustments should be attempted without full network sweep analysis facilities to monitor both insertion loss and VSWR simultaneously. 6.2.2 Technical Specification PARAMETER SPECIFICATION Response Type Chebyshev Frequency range: 800 - 950MHz (tuned to spec.) Bandwidth: 25MHz (tuned to spec.) Number of sections: 8 Insertion Loss: 1.2 dB VSWR: better than 1.2:1 Connectors: SMA female Power Handling: 100W max operation: -10°C to +60°C Temperature range: storage: -20°C to +70°C Weight: 3 kg (typical)
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-29 of 50 6.3 900MHz Splitter/Combiner (05-002602) 6.3.1 Description The Splitter/Combiner used is a device for accurately matching two or more RF signals to single or multiple ports, whilst maintaining an accurate 50Ω load to all inputs/outputs and ensuring that the VSWR and insertion losses are kept to a minimum. Any unused ports will be terminated with an appropriate 50Ω load. Being passive devices, the splitters should have an extremely long operational life and require no maintenance. Should a unit be suspect, it is usually most time efficient to replace the whole module rather than attempt repair or re-tuning. Being passive devices, the splitters should have an extremely long operational life and require no maintenance. Should a unit be suspect, it is usually most time efficient to replace the whole module rather than attempt repair or re-tuning. 6.3.2 Technical Specification PARAMETER SPECIFICATION Narrowband: 815 – 960MHz Frequency range: Broadband: 800 – 1200MHz Narrowband: 145MHz Bandwidth: Broadband: 400MHz Input ports: 1 Output ports: 2 Narrowband: 3.3dB Insertion loss: Broadband: 3.5dB Return loss input & output: 1.3:1 Impedance: 50 Narrowband: >20dB Isolation: Broadband: >18dB MTFB: >180,000 hours Splitting: 20Watts Power rating: Combining: 0.5Watt Connectors: SMA female Weight: 200g (approximately) Size: 54 x 44 x 21mm (including connectors)
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-30 of 50 6.4 ¼Watt 0- -30 & Switched Attenuator (10-000701) 6.4.1 General Application In many practical applications for Cell Enhancers etc., the gain in each path is found to be excessive. Therefore, provision is made within the unit for the setting of attenuation in each path, to reduce the gain. 6.4.2 Switched Attenuators The AFL switched attenuators are available in two different types; 0 – 30dB in 2 dB steps, or 0 – 15dB in 1 dB steps. The attenuation is simply set using the four miniature toggle switches on the top of each unit. Each switch is clearly marked with the attenuation it provides, and the total attenuation in line is the sum of the values switched in. They are designed to maintain an accurate 50 impedance over their operating frequency at both input and output.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-31 of 50 6.5 Low Noise Amplifier (11-005902) 6.5.1 Description The Gallium-Arsenide low noise amplifier used in the unit is a double stage, solid-state low noise amplifier. Class A circuitry is used throughout the units to ensure excellent linearity and extremely low noise over a very wide dynamic range. The active devices are very moderately rated to provide a long trouble-free working life. There are no adjustments on these amplifiers, and in the unlikely event of a failure, then the complete amplifier should be replaced. This amplifier features its own in-built alarm system which gives a volt-free relay contact type alarm that is easily integrated into the main alarm system. 6.5.2 Technical Specification PARAMETER SPECIFICATION Frequency range: 800 – 960MHz Bandwidth: <170MHz Gain: 19.5dB (typical) 1dB Compression point: 21dBm OIP3: 33dBm Input/Output Return Loss: >20dB Noise Figure: 1dB (typical) Power consumption: 190mA @ 24V DC Supply voltage: 10-24V DC Connectors: SMA female operational: -10°C to +60°C Temperature range: storage: -20°C to +70°C Size: 90 x 55 x 30.2mm Weight: 0.28kg 6.5.3 LNA ‘D’ Connector Pin-out details Connector pin Signal 1 +Ve input (10-24V) 2 GND 3 Alarm Relay O/P bad 4 Alarm Relay common 5 Alarm Relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-32 of 50 6.6 Low Noise Amplifier (11-006702) 6.6.1 Description The Gallium-Arsenide low noise amplifiers used in the system are double stage, solid-state low noise amplifiers. Class A circuitry is used throughout the units to ensure excellent linearity and extremely low noise over a very wide dynamic range. The active devices are very moderately rated to provide a long trouble-free working life. There are no adjustments on these amplifiers, and in the unlikely event of a failure, then the complete amplifier should be replaced. This amplifier features its own in-built alarm system which gives a volt-free relay contact type alarm that is easily integrated into the main alarm system. 6.6.2 Technical Specification PARAMETER SPECIFICATION Frequency range: 800 – 1000MHz Bandwidth: <200MHz Gain: 29dB (typical) 1dB Compression Point: 20dBm OIP3: 33dBm Input/Output Return Loss: >18dB Noise Figure: 1.3dB (typical) Power Consumption: 180mA @ 24V DC Supply Voltage: 10-24V DC Connectors: SMA female operational: -10°C to +60°C Temperature range: storage: -20°C to +70°C Size: 90 x 55 x 30.2mm Weight: 290gms (approximately) 6.6.3 LNA ‘D’ Connector Pin-out details Connector pin Signal 1 +Ve input (10-24V) 2 GND 3 Alarm Relay O/P bad 4 Alarm Relay common 5 Alarm Relay good 6 No connection 7 TTL voltage set 8 TTL alarm/0V (good) 9 O/C good/0V bad
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-33 of 50 6.7 20W Power Amplifier (12-018002) 6.7.1 Description This amplifier is a Class A 20W power amplifier from 800-960MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL). It has built in a Current Fault Alarm Function. Its housing is an aluminium case (Alocrom 1200 finish) with SMA connectors for the RF input/output and a D-Type connector for the power supply and the Current Fault Alarm Function. 6.7.2 Technical Specification PARAMETER SPECIFICATION Frequency range: 800-960MHz Small signal gain: 30dB Gain flatness: ±1.2dB I/O Return loss: >18dB 1dB compression point: 42.8dBm OIP3: 56dBm Supply voltage: 24V DC Supply current: 5.0Amps (Typical) operational: -10°C to +60°C Temperature range storage: -20°C to +70°C Weight: <2kg (no heatsink) 6.7.3 PA 7-Way Connector Pin-outs Connector Pin Signal A1 (large pin) +24V DC A2 (large pin) GND 1 Alarm relay common 2 TTL alarm/0V good 3 Alarm relay contact (bad) 4 Alarm relay contact (good) 5 O/C good/0V bad (TTL)
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-34 of 50 6.8 D.I.P Channel Control Module (17-002101) 6.8.1 Description The operating frequency for each channel in each repeater is programmed by 16 DIL (Dual In Line) switches. The programming switches are mounted in the Channel Control Module. The Channel Selectivity Modules are connected to the Channel Control Module via multi-way ribbon cables. Adjacent to the DIL switches for each channel is a toggle switch to turn on and off individual channels as required. A green LED indicates the power status of each channel. A red LED shows the alarm condition for each channel. An illuminated alarm LED indicates that the synthesiser has not achieved phase lock and that the module is disabled. There is a problem which requires investigation, often a frequency programmed outside the operating frequency range. The following information is necessary before attempting the programming procedure. 1) operating frequency 2) synthesiser channel spacing (step size) 3) synthesiser offset (IF)
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-35 of 50 6.8.2 Programming Procedure Check that the required frequency falls within the operational frequency limits of the Cell Enhancer. For each channel required, subtract the synthesiser offset from the required operating frequency and record the resulting local oscillator frequency. Divide each local oscillator frequency by the channel spacing and check that the result is an integer (i.e: no remainder). If the synthesiser division ratio is not an integer value, check the required operational frequency and repeat the calculation checking for mistakes. Convert the required local oscillator frequency to synthesiser programming switch state patterns according to the following table. 6.8.3 12.5kHz step size switch functions Switch Number Synthesiser offset added when switch in UP position 1 +12.5kHz 2 +25kHz 3 +50kHz 4 +100kHz 5 +200kHz 6 +400kHz 7 +800kHz 8 +1.6MHz 9 +3.2MHz 10 +6.4MHz 11 +12.8MHz 12 +25.6MHz 13 +51.2MHz 14 +102.4MHz 15 +204.8MHz 16 +409.6MHz
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-36 of 50 6.8.4 25kHz step size switch functions Switch Number Synthesiser offset added when switch in UP position 1 +25kHz 2 +50kHz 3 +100kHz 4 +200kHz 5 +400kHz 6 +800kHz 7 +1.6MHz 8 +3.2MHz 9 +6.4MHz 10 +12.8MHz 11 +25.6MHz 12 +51.2MHz 13 +102.4MHz 14 +204.8MHz 15 +409.6MHz 16 +819.2MHz 6.8.5 Programming Example Frequency required: 454.000MHz Channel spacing: 12.5kHz Synthesiser offset: -21.4MHz The Local Oscillator frequency is therefore: 454.000 – 21.4 = 432.600MHz Dividing the LO frequency by the channel spacing of 0.0125MHz: 432.600 = 34608 0.0125 This is an integer value, therefore it is OK to proceed. Local Oscillator Frequency Switch settings 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 432.600 MHz 1 0 0 0 0 1 1 1 0 0 1 1 0 0 0 0 Switch setting: 0 = switch DOWN (ON, frequency ignored ) 1 = switch UP (OFF, frequency added )
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-37 of 50 6.8.6 17-002101 Controller Module DIP Switch Connector Data IDC PIN 25-way Connector Function (12.5kHz steps) 1 13 Freq. bit 1 (12.5kHz) 2 25 Freq. bit 2 (25kHz) 3 12 Freq. bit 3 (50kHz) 4 24 Freq. bit 4 (100kHz) 5 11 Freq. bit 5 (200kHz) 6 23 Freq. bit 6 (400kHz) 7 10 Freq. bit 7 (800kHz) 8 22 Freq. bit 8 (1.6MHz) 9 9 Freq. bit 9 (3.2MHz) 10 21 Freq. bit 10 (6.4MHz) 11 8 Freq. bit 11 (12.8MHz) 12 20 Freq. bit 12 (25.6MHz) 13 7 Freq. bit 13 (51.2MHz) 14 19 Freq. bit 14 (102.4MHz) 15 6 Freq. bit 15 (204.8MHz) 16 18 Freq. bit 16 (409.6MHz) 17 5 Module alarm 18 17 Gain bit 1 19 4 Gain bit 2 20 16 Gain bit 3 21 3 Gain bit 4 22 15 +5V 23 2 0V 24 14 Switched 12V 25 1 0V 26 --- ---
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-38 of 50 6.8.7 Drg. N. 17-002190, DIP Switch Module Controller Outline Drawing BYDATEDESCRIPTIONNoISSUETHIRD ANGL E PROJECTION123456789ABCDEF1 23456789ABCDEFFax : 01494 777002Tel : 01494 777000Aerial Facilities LimitedTHIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.REPRODUCTION OR USE OF THIS DESIGN BY OTHERS ISPERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITINGBY AERIAL FACILITIES LTD.NO DECIMAL PLACE ± 1 mmO NE DECIMAL PL ACE ± 0.3 mmTWO DECIMAL PL ACES ± 0.1mmAL L DIMENSIO NS ARE IN mmUNLESS OTHERWISE STATEDCHKDDRAWN APPDDATET O L ERANCES SCALEEnglandCUSTO MER DRAWING.NoTITLE3ACHANNELISED CELL ENHANCER,CHANNELCONTROL MODULE,OUTLINE17-002190NTSDJL 11/11/94CHANNEL 4PROGRAMPROGRAMCHANNEL 2CHANNEL 1PROGRAMCHANNEL 3PROGRAMOFFPO W ERAL AR M78ONPO W ERAL AR MOFFONPO W ERONOFFAL AR MPO W EROFFONAL AR MON.654312LimitedMODULECHANNEL CONTROLAerial FacilitiesFINISH : ALOCROM 1200MATERIAL : FRONT PANEL-ALUMINIUM ALLOYBM JDDJL11/11/94PRODUCTION ISSUE(CR0629)122A PRODUCTION ISSUE (CR0962)CR077910/4/96DJLSEW25/1/99ON.8756342116 18ON.7654321ON.8756342116 18ON.7654321ON.8756342116 18ON.7654321ON.8756342116 1SWITCH 1SWITCH 163A1/10/02DJLECN2646
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-39 of 50 6.9 Channel Selective Modules (17-003033, 17-009143, 17-009127 & 17-010803) 6.9.1 Description The channel selectivity module is employed when the Cell Enhancer requirement dictates that very narrow bandwidths (single operating channels), must be selected from within the operating passband. One channel selectivity module is required for each channel. The Channel Selectivity Module is an Up/Down frequency converter that mixes the incoming channel frequency with a synthesised local oscillator, so that it is down-converted to an Intermediate Frequency (IF) in the upper HF range. An eight pole crystal filter in the IF amplifier provides the required selectivity to define the operating passband of the Cell Enhancer to a single PMR channel. The same local oscillator then converts the selected IF signal back to the channel frequency. Selectivity is obtained from a fixed bandwidth block filter operating at an intermediate frequency (IF) in the low VHF range. This filter may be internal to the channel selectivity module (Crystal or SAW filter) or an externally mounted bandpass filter, (LC or Helical Resonator). Various IF bandwidths can therefore be accommodated. A synthesized Local Oscillator is employed in conjunction with high performance frequency mixers, to translate between the signal frequency and IF. The operating frequency of each channel selectivity module is set by the programming of channel selectivity module frequencies and is achieved digitally, via hard wired links, banks of DIP switches, or via an onboard RS232 control module, providing the ability to remotely set channel frequencies. Automatic Level Control (ALC) is provided within each channel selectivity module such that the output level is held constant for high level input signals. This feature prevents saturation of the output mixer and of the associated amplifiers. Alarms within the module inhibit the channel if the synthesised frequency is not locked. The synthesiser will not usually go out of lock unless a frequency far out of band is programmed. The channel selectivity module is extremely complex and, with the exception of channel frequency programming within the design bandwidth, it cannot be adjusted or repaired without extensive laboratory facilities and the necessary specialised personnel. If a fault is suspected with any channel selectivity module it should be tested by substitution and the complete, suspect module should then be returned to AFL for investigation. The channel selective modules fitted to the VHF cell enhancers in the Weehawken system are all hard-wired and therefore not adjustable, however, the modules fitted to the UHF and 800MHz enhancers have DIP switch controller modules fitted, allowing the set frequency to be changed on site. There is no functionality to change the frequencies remotely.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-40 of 50 6.9.2 Drg. N. 17-003080, Generic Channel Module Block Diagram
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-41 of 50 6.10 12 & 24V Relay Boards (20-001601 & 20-001602) 6.10.1 Description The General Purpose Relay Board allows the inversion of signals and the isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with completely isolated wiring, accessed via screw terminals. Both relays are 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. It’s common use is to amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system. Note that the board is available for different voltages (12 or 24V) depending on the type of relays fitted at RL1 and RL2. 6.10.2 Technical Specification PARAMETER SPECIFICATION Operating voltage: 8 to 30V (floating earth) Alarm Threshold: Vcc - 1.20 volt +15% Alarm output relay contacts: Max. switch current: 1.0Amp Max. switch volts: 120Vdc/60VA Max. switch power: 24W/60VA Min. switch load: 10.0µA/10.0mV Relay isolation: 1.5kV Mechanical life: >2x107 operations Relay approval: BT type 56 Connector details: Screw terminals operational: :-10°C to +55°C Temperature range storage: :-40°C to +70°C
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-42 of 50 6.11 12 & 24V Single Relay Board (80-008901 & 80-008902) 6.11.1 Description 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. It’s common use is to amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system. Note that the board is available for different voltages (12 or 24V) depending on the type of relay fitted at RL1. 6.12 JWS150-12/A PSU (96-300052) 6.12.1 Description The power supply unit is a switched-mode type capable of supplying 15V DC at 12Amps continuously. The equipment in this system requires 12V DC so the output voltage has been factory adjusted to 12.3V. Equipment of this type typically requires approximately 4-6Amps at 12V DC, so the PSU will be used conservatively ensuring a long operational lifetime. No routine maintenance of the PSU is required. If a fault is suspected, then the output voltage from the power supply may be measured on its output terminals. This is typically set to 12.3V. The output voltage may be varied using a multi-turn adjustment potentiometer mounted close to the DC output terminals. All the PSU’s used in AFL Cell Enhancers are capable of operation from either 110 or 220V nominal AC supplies. The line voltage is sensed automatically, so no adjustment or link setting is needed by the operator. 6.12.2 Technical Specification AC Input Supply: 110 or 220V nominal Voltage: 90 to 132 or 180 to 264V (absolute limits) Frequency: 47 to 63Hz DC Output Supply: 15V DC (nominal) Voltage: 12.3-17V (absolute limits) Current: 12A
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-43 of 50 7. 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. 7.1 General Remarks The size and weight of the equipment racks mean that they represent a significant topple hazard unless they are securely 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 assembly. If the installer is in any doubt about the suitability of a site it is recommended that he consult with an appropriately qualified Structural Engineer. It is important in determining the location of the rack within the room that space is allowed for access to the front and rear of the equipment. To enable maintenance to be carried out, the doors must be able to fully open. The location must be served with a duct to allow the entry of cables into the rack. The mains power supply is connected to the terminal strip located on the bulkhead at the rear of the equipment at floor level. It is recommended that the connection is made by a qualified electrician, who must satisfy himself that the supply will be the correct voltage and of sufficient capacity. All electrical and RF connection should be completed and checked prior to power being applied for the first time.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-44 of 50 7.2 RF Connections All RF connections are made to the cable termination, located on the bulkhead at the rear of the equipment at floor level. Care must be taken to ensure that the correct connections are made with particular attention made to the base station TX/RX ports. In the event that the base transmitter is connected to the RX output of the rack, 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. 7.3 Commissioning Once all connections are made the equipment is ready for commissioning. To commission the system the test equipment detailed in Section 8.2 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. On initial power up the system alarm indicators on the front panels of the equipment should be checked. A red LED illuminated indicates a fault in that particular shelf that must be investigated before proceeding with the commissioning. A green LED on each shelf illuminates, to indicate that the power supply is connected to the shelf. 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.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-45 of 50 8. MAINTENANCE 8.1 Fault Finding 8.1.1 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 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 aerial 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. 8.1.2 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 panel LED’s. The green LED on the front panel should be illuminated, while the red alarm indicator should be off. If an Alarm is on, then that individual module must be isolated and individually tested against the original test specification. The individual amplifier units within the shelf have a green LED showing through a hole in their piggy-back alarm board, which is illuminated if the unit is working correctly. 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.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-46 of 50 8.1.3 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. 8.1.4 Uplink Testing the uplink involves a similar procedure to the downlink except that the frequencies used are those transmitted by the mobile equipment. 8.1.5 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.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-47 of 50 8.1.6 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. 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 AFL for repair. 8.1.7 Service Support Advice and assistance with maintaining and servicing this system are available by contacting Aerial Facilities Ltd. 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. Aerial Facilities Ltd maintains a high level of stock of most modules which can usually be despatched at short notice to support this policy. 8.2 Tools & Test Equipment The minimum tools and test equipment needed to successfully service this AFL 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. 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.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-48 of 50 8.3 Care of Modules 8.3.1 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/inserted with care. The module may have connectors on its underside, which might not be visible to the service operative. 8.3.2 Module Removal (LNA’s, 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). 8.3.3 Module Replacement (general): 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. 8.3.4 Power Amplifiers 1) Remove power to the unit. (Switch off @ 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 not have to be removed before lifting the amplifier.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-49 of 50 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. 8.3.5 Low Power Amplifier Replacement 1 Disconnect the mains power supply and disconnect the 24V dc supply connector for the LPA. 2 Disconnect the RF input and output cables from the LPA. 3 Disconnect the alarm connector. 4 Remove the alarm monitoring wires from (D type connector) pins 9 and 10. 5 Remove the LPA module by removing the four retaining screws, replace with a new LPA module and secure it with the screws. 6 Connect the RF cables to the LPA input and output connectors. Reconnect the wires to the alarm board connector pins 9 and 10. 7 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 8.3.6 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 AFL for investigation/repair must be so protected. Please contact AFL’s quality department before returning a module.
Weehawken Tunnel 900MHz Pager System User/Maintenance Handbook Handbook N.-Weehawken_900 Issue No:-A Date:-05/08/05 Page:-50 of 50 APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS GENERAL INFORMATION Site Name: Client Name: Date: AFL Equip. Model N. 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 dBm F – Antenna Isolation dB G – Input signal level from donor BTS dBm Operating 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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