Mission Valley Radio System + Upgrade User/Maintenance Handbook For San Diego Association AFL Works Order # AFL product part # Aerial Facilities Limited Technical Literature Handbook No. 50-078201HBKM Q111353 & Q11740 50-078001 (800MHz & VHF CEs) 80-209302 (Battery Backup) 50-078021 (Upgrade hardware) Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Issue No.
Table of Contents 1. INTRODUCTION ............................................................................................................5 1.1 1.2 2. Scope and Purpose of document.......................................................................................... 5 Limitation of Liability Notice.................................................................................................. 5 SAFETY CONSIDERATIONS .............................................................................
.13.4 3.14 3.14.P 3.14.1 3.14.2 3.14.3 3.14.4 3.15 VHF Combiner Photographs............................................................................................................41 Description .......................................................................................................................................42 Technical Specification ....................................................................................................................42 Parts List ..................
7.3.2 7.3.3 7.3.4 7.3.5 7.3.6 Module Removal (LNAs, general procedure): .................................................................................68 Module Replacement (general): ......................................................................................................68 Power Amplifiers ..............................................................................................................................68 Low Power Amplifier Replacement...........................................
1. INTRODUCTION 1.1 Scope and Purpose of document This handbook is for use solely with the equipment identified by the AFL Part Number shown on the front cover. It is not to be used with any other equipment unless specifically authorised by Aerial Facilities Limited. The purpose of this handbook is to provide the user/maintainer with sufficient information to service and repair the equipment to the level agreed.
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.
2.5 Chemical Hazard Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes used in devices within equipment produced by Aerial Facilities Ltd. Beryllium oxide dust can be toxic if inhaled, leading to chronic respiratory problems. It is harmless if ingested or by contact. Products that contain beryllium are load terminations (dummy loads) and some power amplifiers. These products can be identified by a yellow and black “skull and crossbones” danger symbol (shown above).
3. MASTER SITE RACKS (50-078001) 3.1 Master Site Description The master site system consists of three, swing-frame 19” rack cabinets which provides 800MHz Channelised (x 24) & VHF Simplex/Duplex coverage for the various concourses, platforms and tunnels with a 12V battery backup service (for the 800MHz line amplifiers) that will guarantee limited continued coverage in case of mains power failure. 3.
VHF channel modules and amplifier shelves (front view, door open) Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
RF distribution rack (front view, door open) 800MHz rack (front view, door open) Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
VHF rack (rear view, door open) Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
800MHz rack (rear view, door open) Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.2 Master Site Electrical Specification PARAMETER Frequency range: Bandwidth: Gain: Gain Adjustment: Uplink Power: Downlink Power Uplink Downlink Noise Figure: AGC: VSWR: RF Connectors: Alarms Fitted: (non-latching, volt-free relay contacts/TTL) IP3: 3.3 SPECIFICATION 851-869MHz (Downlink) 806-824MHz (Uplink) 160.2-161.8MHz (Simplex/Duplex) 18MHz (UHF) 1.6MHz (VHF) >100dB (Uplink) >90dB (Downlink) 0 - 30dB (in 2dB steps) >5.0Watts (UHF) >5.0Watts (VHF) >40.0Watts (UHF) *(100W upgrade) >5.
3.4 Master Site Parts List (50-078001) AFL Part # 50-078002 50-078003 50-078004 50-078010/1 50-078010/2 50-078011/1 50-078011/2 50-078011/3 50-078011/4 50-078012 50-078013 50-078014 50-078015 50-078017 60-020608 80-209302 Part Description 800MHz AIR I/F + BSCE UPLINK SHELF 800MHz 8CH CHANNEL MOD.
3.5 Channel Frequency Listing Ch.
3.6 Master Site Drawings 3.6.1 Master Site Racks Layout Drawing, Drg. # 50-078051 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.6.2 Master Site System Diagram, Drg. # 50-078086 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.7 800MHz Air I/F + BSCE Uplink Shelf (50-078002) 3.7.P 800MHz AIF Shelf Photographs Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.7.1 Description This shelf is the interface between the system’s 800MHz bi-directional tunnel amplifiers and the off-air antenna. In the downlink direction, the incoming antenna RF is directed through a bandpass filter to a pair of 20dB gain low noise amplifiers that have a switchable 0-30dB attenuator between them. The resultant single path is then divided several times and fed out of the shelf to the channel selective modules (x 24).
3.7.3 Parts List AFL Part # 02-007201 05-002602 05-003801 10-000701 11-005902 11-006702 12-018001 14-000225 17-001109 17-001201 20-001601 50-012820 50-012822 50-012825 50-027720 80-090822 80-310420 91-030002 91-130005 91-500025 91-510003 91-510004 91-510032 91-520001 91-520005 91-520010 91-600007 91-600014 91-600015 91-660001 96-110034 96-300057 96-700034 96-700035 96-900018 97-400005 99-200008 99-200017 Part Description 900MHz 8POLE 10-20MHz B/W SMA 900MHz SPLITTER/COMBINER, 20W 3WAY GEN.
3.7.4 800MHz Off-Air Repeater System Diagram, Drg. # 50-078082 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.8 800MHz 8Ch. Channel Module Sub-Rack (50-078003) 3.8.P 800MHz Channel Module Sub-Rack Photographs Photographs of this sub-rack are unavailable. 3.8.1 Description The channel modules are built into a sub-rack which is the equivalent height of a 3U shelf. Each subrack has eight channel selective modules (3 sub-racks=24 channels) and two channel control modules that are DIP switch banks that configure the frequencies for the channel modules, see below for channel module programming.
3.8.3 VHF/ UHF Programming Procedure The operating frequency for each channel in the Cell Enhancer is programmed by 16 DIL (Dual In Line) switches. The programming switches are mounted in the Channel Control Modules which are located beside the channel modules in the module racking. The Channel Selectivity Modules are connected to the Channel Control Module via 25 way ribbon cables. Switch 16 is at the far left of the line of switches leading down to Switch 1 at the far right of the line.
3.8.4 VHF/ UHF Programming Example Frequency required: 465.5MHz Channel spacing: 12.5kHz Synthesiser offset: 21.4MHz The Local Oscillator frequency is therefore: 465.4 – 21.4 = 444.0 MHz Dividing the LO frequency by the channel spacing of: 0.0125MHz: 444.0 0.0125 = 35520 This is an integer value, therefore it is OK to proceed. Local Oscillator Frequency of: 444.
3.8.5 900MHz Programming Procedure Check that the required downlink and uplink frequencies fall within the operational band limits of the Cell Enhancer. For each Downlink and Uplink channel frequency, subtract the appropriate synthesiser offset frequency from the required operational frequency and record the resulting local oscillator frequencies. Divide each Downlink and Uplink local oscillator frequency by the synthesiser channel spacing and check that the result is an integer (i.e. no remainder).
3.8.
3.8.7 8 Channel Module Shelf System Diagram, Drg. # 50-078083 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.9 800MHz 40Watt Power Amplifier/Driver Shelf (50-078004) 3.9.P 40Watt PA Shelf Photographs Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.9.1 Description The 40Watt master site power amplifier shelf concerns itself with powering the 800MHz channel information to the LCX tunnel antennas. The output from the channel module shelves is split into two and input to each of the two PA shelves. Each PA powers either the East or West tunnel leaky feeder antennas and a proportion of the LCX signal provides a feed to the 800MHz in-line amplifiers that power the fire exit stairs antennas.
3.9.3 Parts List AFL Part # 02-007201 05-002602 10-000901 11-005802 12-018002 14-000225 50-012820 50-012822 50-012825 50-027720 80-090822 80-310420 91-030002 91-510032 91-520001 91-520005 91-520010 91-600007 91-600014 91-600015 91-660001 96-300057 96-700034 96-700035 96-900018 97-400005 99-200008 99-200017 Part Description 900MHz 8POLE 10-20MHz B/W SMA 900MHz SPLITTER/COMBINER, 20W SW. ATTENUATOR 0.25W 0-15dB 900MHz DRIVER STAGE WITH RELAY PA 800-960MHz 20W CLASS A CASE RAIL LONG R.S.A./R.F.A.
3.10 VHF Simplex Shelf (50-078010/1) 3.10.P VHF Simplex Shelf Photographs Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.10.1 Description The VHF simplex shelves are two-path, single frequency cell enhancers that cut the DC power (and thereby mute the amplifiers) to the opposing path whenever a signal is detected. This is achieved by using highly accurate crystal filters to set the exact channel frequency and speciality channel selective modules that react to detectors placed in each path.
3.10.3 Parts List AFL Part # 08-930002 10-000901 11-001202 12-002213 12-002220 12-002804 12-002820 12-004902 13-001803 13-001822 13-002811 17-001201 17-002802 17-009135 19-000826 19-000921 19-000924 80-063920 91-030002 91-500001 91-510003 91-600001 91-600014 91-620001 91-700017 93-540035 *93-980109 **93-980112 96-110001 96-300014 96-700017 96-700034 96-700035 97-400005 * ** Part Description 2 PORT ISOLATOR 150-300MHz SMA SW. ATTENUATOR 0.
3.10.4 VHF Shelf System Diagram, Drg. # 50-078090 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.11 VHF Simplex Shelf (50-078010/2) This second VHF simplex shelf is hardware identical to the previously described shelf (50-07801/1) in section 3.10 except for the crystal filters used to set the channel frequency. 3.12 VHF Duplex Shelves (50-078011/1-4) 3.12.P Duplex Shelf Photographs There are four different types of duplex shelves 50-078011/1,2,3 & 4 they differ only in the frequencies they process. Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.12.1 Description The duplex shelves are part of the VHF amplification system and like the simplex shelves, have crystal filters instead of bandpass filters to set frequencies and bandwidths. There are two downlink channels and two uplink channels, the downlink paths having isolators fitted to each of the 5Watt output stages to prevent interfering reflections from the other channel.
3.12.3 Parts List AFL Part # 08-930002 10-000901 11-006002 12-002201 12-002203 12-002220 12-004902 13-001803 13-001822 13-002812 17-001105 17-009135 19-000826 19-000921 19-000924 80-063920 91-030002 91-500001 91-510003 91-600001 91-600014 91-620001 91-700017 96-110001 96-700034 96-700035 97-400005 *93-980103 *93-980104 *93-980105 *93-980106 *93-980107 *93-980108 *93-980110 *93-980111 * Part Description 2 PORT ISOLATOR 150-300MHz SMA SW. ATTENUATOR 0.
3.12.4 VHF Duplex Shelf System Diagram, Drg. # 50-078091 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.13 VHF Air Interface Shelf (50-078012) 3.13.1 Description The VHF system is provided with three Yagi off-air antennas, two downlink, receiving downlink signals from two different directions, and one uplink, facing the nearest BTS. Bandpass filters exclude extraneous noise on the frequency bands to be processed and once filtered, the downlink signal is amplified (10dB gain) and separately split to the simplex and duplex shelves’ inputs.
3.13.4 VHF Air Interface Shelf System Diagram, Drg. # 50-078092 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.14 VHF Combiner Shelf (50-078013) 3.14.P VHF Combiner Photographs Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.14.1 Description The purpose of the VHF combiner is to take the downlink products of all the VHF shelves and combine them together so that they may, in turn, be combined with the 800MHz signals from the cellular amplifiers to feed the tunnel antennas. The reverse is true of the uplink path where the VHF signals from each of the tunnel antennæ are coupled from the 800MHz signals, filtered, amplified, combined and then split equally for the inputs of the VHF uplink amplifiers.
3.14.4 VHF Combiner Shelf System Diagram, Drg. # 50-078093 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.15 VHF PSU Shelf (50-078014) 3.15.P VHF PSU Photographs Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
3.15.1 Description The power supply shelves are separate for the VHF/UHF and 800MHz cell enhancers. The VHF/UHF supply shelf is a 24V DC shelf which supplies six, 24Volt XLR type connector outputs at a maximum total output power of 800Watts DC. These DC outputs are fused at a 10Amp rating although four of the six DC outputs will be drawing less than 5Amps each at any one time. 3.15.
3.16 VHF/800MHz Tx Multi-coupler (50-078015) 3.16.1 Description The multi-coupler shelf interfaces the VHF/UHF and 800MHz power output signals together to drive the downlink Tx antennas and to receive the low-level signals from the uplink antennas prior to their amplification and re-broadcast bask to the BTS.
3.16.4 Tx Multi-coupler System Diagram, Drg. # 50-078095 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
4. BAND SELECTIVE BI-DIRECTIONAL LINE AMPLIFIER 4.1 BDA Wall Assembly (50-078017) 4.1.P BDA Assembly Photograph View of Wall Case Internal (door open) Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
4.1.1 Description The wall mounted tunnel BDA is a band-selective unit which draws its RF from the tunnel leaky feeder coaxial cable, feeding separate down and uplink ports and operating in the 800MHz frequency region with a cross-band coupled bypass to allow VHF signals to be passed through the amplifier with just a small loss.
4.1.
4.1.4 800MHz In-Line BDA System Diagram, Drg. # 50-078097 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No. 50-078021HBKM F E D C B A 281.00 2 CHKD APPD RB 14/5/04 DATE Page 52 of 85 1 AL L DIMENSIO NS ARE IN mm UNL ESS O THERWISE STATED GD MRB DRAWN 3 2 NO DECIMAL PL ACE ± 1 mm O NE DECIMAL PL ACE ± 0 .3 mm TWO DECIMAL PL ACES ± 0 .1 mm TO L ERANCES 3 SCAL E 1:5 A LA RM THIS IS A PRO PRIETARY DESIG N O F AERIAL FACIL ITIES L TD.
4.1.
5. MASTER SITE UPGRADE 5.1 Master Site Upgrade Rack Assembly (50-078021) 5.1.1 Master Site Upgrade Rack Description This upgrade to the Mission Valley radio repeater system is concerned only with the 800MHz band of frequencies, which, in the original specification could carry up to 24 channels of cell data simultaneously.
5.1.
5.1.7 Master Site Upgrade System Diagram, Drg. # 50-078081 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
5.2 Upgrade Channel Frequencies Chan # Tx Frequency Rx Frequency Type Modulation 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 868.4125 868.1375 868.0750 867.9125 867.6375 867.6125 867.4125 867.3875 867.1375 866.9125 866.8875 866.6375 866.4125 866.1375 866.0375 868.6000 867.0625 866.4375 868.4375 823.4125 823.1375 823.0750 822.9125 822.6375 822.6125 822.4125 822.3875 822.1375 821.9125 821.8875 821.6375 821.4125 821.1375 821.0375 823.6000 822.0625 821.4375 823.4375 C.C. C.C.
5.3 Master Site HPA Interface Shelf (50-078005) 5.3.P HPA Interface Shelf Photographs Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
5.3.1 Description These new high power (80Watts) amplifier shelves have been introduced in place of the 40W amplifiers originally supplied. The higher power amplifiers are needed to maintain sufficient power per channel for the 800MHz cellular repeater as there are now 19 extra channels. This shelf has two amplifiers, a low noise amplifier and a low power (2W) amplifier which acts as a driver for the high power shelf (50-146703).
5.3.4 HPA Interface Shelf System Diagram, Drg. # 50-078085 Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
5.4 High Power Amplifier Shelf (50-146703) 5.4.P High Power Amplifier Shelf Photographs Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
5.4.1 Description This amplifier is a Class A, fan cooled, 80W power amplifier in the frequency range 851 to 866MHz, built into a 4U standard rack space unit. The fan-cooled amplifier is provided with an improving linearity pre-distortion type correction circuit to give improved Output Intermodulation Intercept Point (OIP3) and is housed in an aluminium case having an Iridite NCP finish. SMA connectors are used for the RF input and output ports.
5.4.
6. INSTALLATION 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 AFL should these figures be needed for future reference or diagnosis. 6.1 General Remarks The equipment racks that these master site shelves will be fitted into must be located on a flat, level surface that is made from a material suitable for bearing the weight of the rack assembly.
7. MAINTENANCE 7.1 Fault Finding 7.1.1 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.
7.1.3 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.
7.1.6 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.
7.3 Care of Modules 7.3.1 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. 7.3.
7.3.5 1 2 3 4 5 6 7 Low Power Amplifier Replacement 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.
APPENDIX A A.1 Glossary of Terms used in this document A Radio Frequency amplifier which can simultaneously amplify and reRepeater or Cell Enhancer broadcast Mobile Station and Base Transceiver Station 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.
Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No. 50-078021HBKM F E D C B A Page 71 of 85 GD APPD 10/ 05/ 00 DATE RF 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED MB CHKD PL DRAWN RF FREQUENCY PROGRAMMING DATA B / W=30 to 200 kHz 2 HI IN OUT R. S.
A.
A.4 Amendment List Record Sheet Issue No. A 04/01/06 Incorporated by CMH 1 31/07/06 CMH 1st Issue CMH Incorporated all hardware into one document 2A Date Page Nos. Amended Reason for new issue 1st Draft Document Ref: 50-078021HBKM Mission Valley Radio Repeater Equipment + Upgrade User/Maintenance Handbook Handbook No.
A.5. 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.
APPENDIX B Initial Equipment Set-up Calculations GENERAL INFORMATION Site Name: Client Name: Date: AFL Equip. Model No. ANTENNA SYSTEMS Model Gain Azimuth Comments Type Loss Length Comments A - Service Antenna B – Donor Antenna C – Service Feeder D – Donor Feeder INITIAL PARAMETERS E – CE Output Power F – Antenna Isolation G – Input signal level from donor BTS Operating Voltage DOWNLINK CALCULATIONS Parameter Input signal level (G) CE max.
APPENDIX C - BATTERY BACKUP C.1 GENERAL DESCRIPTION The 80-209302 Battery Backup Unit is designed to complement AFL’s extensive range of Cell Enhancers and provide for continued operation during mains power failure. The Battery Backup Unit is mounted in a single environmentally-protected case.
C.2. BATTERY BACKUP PHOTOGRAPHS Mission Valley Radio Repeater Equipment + UpgradeUser/Maintenance Handbook APPENDIX C Battery Backup Handbook No.
C.3. SPECIFICATION C.3.1 Technical Specification PARAMETER Input Voltage: Input Frequency: Input Current: Rating Of SMPSU: Output (Load) Voltage: Output (Load) Current: Battery Run Time: Batteries: Low Voltage Cut-off Point: Standard Alarms: Optional Alarms Available: * SPECIFICATION Main SMPSU:90 Vac to 264 Vac Universal Input. Battery Charger:93-132 Vac and 187-264 Vac Switch selectable 47 to 63 H <2.0 A typical at 230 Vac (8.
C.3.3 Technical Description AFL Cell Enhancer/repeater equipment often requires backup against failure of the mains AC supply. Since the equipment runs on a 12V DC supply the most efficient method of providing backup is by a bank of dry lead acid batteries of adequate capacity. The Battery Backup Power Supply Unit incorporates a 400 Watt DC power supply and a Charger/Regulator with a bank of two 12V 40AH batteries connected in parallel.
C.4. GENERAL DRAWINGS C.4.1 Drg. No. 80-209374, 160Ah 12V Battery Backup Circuit Diagram Mission Valley Radio Repeater Equipment + UpgradeUser/Maintenance Handbook APPENDIX C Battery Backup Handbook No.
C.4.2 Low Voltage Battery Disconnect and O/P Voltage Limiter Schematic Mission Valley Radio Repeater Equipment + UpgradeUser/Maintenance Handbook APPENDIX C Battery Backup Handbook No.
F E D C B A Mission Valley Radio Repeater Equipment + UpgradeUser/Maintenance Handbook APPENDIX C Battery Backup Handbook No. 50-078021HBKM Page 82 of 85 PB APPD CT 14/05/04 DAT E 1 ALL DIMENSIONS ARE IN mm UNLESS OT HERWISE ST AT ED CHKD PB DRAWN 1 CAUTION Heavy 3 2 NO DECIMAL PLACE ± 1mm ONE DECIMAL PLACE ± 0.3mm T W O DECIMAL PLACES ± 0.
C.4.4 BBU/Amplifier Power Wiring And Alarms Diagram 2 LOC KABLE D OOR C ATC H ES BATTER Y BAC K U P CA UT ION Heavy DC OUTPUT 12V OUT PIN 1=12V, PIN 2=0V A eri al F aci l i ti es England Li mi ted ALARM ALARM(TO CONTROL ROOM) PIN 1 PIN 2 EARTH STUD 110V A.
C.5. BBU ALARMS & MONITORING SYSTEM C.5.1 Description The Battery Backup is fitted with a two alarm outputs. The Summary Alarm (Pins 1 & 2) has normally closed, volt free, contacts which open when either the SMPSU output fails and/or the battery charger output fails and/or the door to the Battery Backup is opened. Mission Valley Radio Repeater Equipment + UpgradeUser/Maintenance Handbook APPENDIX C Battery Backup Handbook No.
C.6. INSTALLATION C.6.1 Battery Backup Unit Installation The procedure for installing and commissioning an AFL Cell Enhancer Battery Backup Unit is generally as follows: 1 Fix the Battery Backup Unit in the chosen position. 2 Connect a suitable mains power supply to the Battery Backup Unit. 3 Connect the DC cable from the Battery Backup Unit to the Cell Enhancer. 4 Switch the Battery Backup Unit on by switching on the two circuit breakers and the battery output switch on the internal indicator panel.
