9 Channel, Channelised UHF Cell Enhancer Maintenance Handbook For Terry Consulting AFL Works Order Nō.: Q10965 AFL product part Nō.
Table of Contents AMENDMENT LIST RECORD SHEET ................................................................................................. 5 INTRODUCTION ....................................................................................................................................... 6 Scope...........................................................................................................................................................................6 Purpose..............................
5.2.6.2 Technical Specification ....................................................................................................................30 5.2.6.3 Drg. Nō. 12-002201, 3 Stage Alarm Board Assembly Drawing & Parts List..................................31 5.2.6.4 Drg. Nō. 12-002270, 3 Stage Alarm Board Circuit Diagram..........................................................32 5.2.6.5 Generic Rack Shelf Enclosure Alarm Wiring Sketch ..................................................................
7.1.2 Downlink..................................................................................................................................................65 7.1.3 Uplink.......................................................................................................................................................65 7.1.4 Fault repair ...............................................................................................................................................65 7.1.
AMENDMENT LIST RECORD SHEET Issue Nō. 1 Date 04/08/2003 Incorporated by CMH Page No.
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. This is a controlled release document and, as such, becomes a part of Aerial Facilities’ Total Quality Management System. Alterations and modification may therefore only be performed by Aerial Facilities Ltd.
Glossary of Terms Repeater or Cell Enhancer Band Selective Repeater Channel Selective Repeater BTS C/NR Downlink (D.L.) Uplink (U.L.) EMC GND DC AC ID OIP3 LED M.S. N/A N/C NF RF Rx Tx S/N A Radio Frequency (RF) amplifier which can simultaneously amplify and re-broadcast Mobile Station (MS) and Base Transceiver Station (BTS) signals. A Cell Enhancer designed for operation on a range of channels within a specified frequency band.
Key to AFL RF Module Drawing Symbols 9 Way Channelised UHF Cell Enhancer Maintenance Handbook H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 Page:-8 of 69
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.
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).
2. OVERVIEW/SYSTEM DESCRIPTION The AFL Channel Selective Cell Enhancer is a 2-way on-band repeater. Various models are available to cover frequency bands from 50MHz to 3000MHz. Its main sphere of applications is in urban areas where the topology is such that shadows occur in the propagation pattern (for example within large buildings, conference centres and tunnels, etc.
3. SPECIFICATION 9 Channel Channelised Cell Enhancer 50-025301 Parts Lists 3.1 AFL Part Nō. 50-025302 50-025303 50-025304 50-025305 50-025306 3.1.1 Description VTA-Downlink Duplexer Shelf VTA-Downlink Amplifier Shelf VTA-Downlink Channel Shelf VTA-Uplink Duplexer Shelf VTA-Uplink Amplifier Shelf Qty. 1 1 1 1 1 VTA-Downlink Duplexer Shelf 50-025302 Parts List 02-011204 02-013401 19-001021 19-001024 91-020004 6P TETRA C/L FILT (NARROW) SMA 6P CL FLTR(0.
3.1.2 VTA Downlink Amplifier Shelf 50-025303 Parts List AFL Part Nō. 05-002603 10-000701 11-006102 11-007302 11-007402 12-002201 12-002220 12-004201 13-001702 50-012820 50-012822 50-012825 50-027720 80-008902 80-032320 80-090822 91-030002 91-100003 91-130001 91-520003 91-600014 91-600015 91-700017 93-540035 96-300054 96-500005 96-700002 96-700005 97-400002 Description UHF 3dB SPLITTER SMA 1/4W0-30dB SWITCHED ATTENUATOR LNA 380-500MHz 1W WITH RELAY LNA. 380-500MHz 20dB (C/W RELAY) GA LNA.
3.1.3 VTA Downlink Channel Shelf 50-025304 Parts List 05-002603 05-003302 05-003401 17-002101 17-003022 17-003023 17-003024 17-003025 17-003028 17-003029 17-010601 97-000002 97-600001 97-600002 3.1.4 UHF 3dB SPLITTER SMA 4 WAY SPLITTER GSM 900MHz 4 WAY SPLITTER LOW POWER CHANNEL CONTROL MODULE MODULE PATTERNED LEAVE SUBRACK SIDE PANEL SUBRACK REAR BRACKET BOTTOM MODULE GUIDE MODULE SQUARE LEAVE TOP MODULE GUIDE CHAN MOD 480MHz, 15kHz B/W BLACK MODULE CAGE RUNNER SUBRACK FRONT HORIZ SUBRACK M2.
3.1.5 VTA Uplink Amplifier Shelf 50-025306 Parts List 02-011204 02-013401 10-000701 11-006102 11-007302 11-007402 12-016301 13-001702 13-003011 17-001101 17-001201 50-012820 50-012822 50-012825 50-027720 80-008902 80-032320 80-090822 91-030002 91-100003 91-130001 91-520003 91-600014 91-600015 93-540035 96-300054 96-500005 96-700002 96-700005 97-400002 6P TETRA C/L FILT (NARROW) SMA 6P CL FLTR(0.5 min BW)LARGE SMA ASSY 1/4W0-30dB SWITCHED ATTENUATOR LNA 380-500MHz 1W WITH RELAY LNA.
3.
3.3 Mechanical Specification PARAMETER SPECIFICATION Height: Eurorack Shelves(1U=44.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 H G F E D C B A 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-18 of 69 1 THIRD ANGLE PROJECTION DOWNLINK ANTENNA 1 No 1A 2 DE S CRI P TION PRODUCTION ISSUE UPLINK ANTENNA BANDPASS FILTER 491.4-492.2MHz 02-011204 BANDPASS FILTER 485.5875MHz 02-013401 2 IS S UE 3 LNA 11-007402 LNA 11-007402 3 DA TE 30/07/03 MNR 4 CHK D DRA WN BANDPASS FILTER 488.4-489.6MHz 02-013401 485.
5. SUB-UNIT MODULES VTA Downlink Duplexer Shelf 60-025302 (4U chassis) 5.1 5.1.1 Bandpass Filters (02-011204 & 02-013401) 5.1.1.1 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.
5.2 VTA Downlink Amplifier Shelf (50-025303, 8U Chassis) 5.2.1 UHF 3dB Splitter (05-002603) 5.2.1.1 Description The 3dB 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. 5.2.1.
5.2.3 Low Noise Amplifier (11-006102) 5.2.3.1 Description The 15dB gain 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 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. 5.2.3.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 H G F E D C B A C1 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-22 of 69 1 THIRD ANGL E PROJECTION RF IN 1 No 1A R1 2 IS S UE C2 8.2pF DE S CRIP TI ON PRODUCTION ISSUE 910R R2 5R6 910R R3 2 3 3 DA TE 23/01/02 18nH L1 18nH L2 MNR 4 CHK D DRA WN C3 3.3pF L3 18nH L4 18nH R4 100R C8 1nF APPD IB 2 3/01 /02 DA TE A LL DIME NS IONS A RE IN mm UNLE S S OTHE RWIS E S TA TE D CB MNR 6.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 F E D C B A CHKD 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-23 of 69 APPD IB 23/01/02 DATE 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED CB MNR DRAWN RF IN 1 -ve +6V 220mA -ve +6V 220mA DC INPUT 3 2 NO DECIMAL PLACE ± 1mm ONE DECIMAL PLACE ± 0.3mm TWO DECIMAL PLACES ± 0.1mm TOLERANCES 3 SCALE THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
5.2.4 Low Noise Amplifiers (11-007302 & 11-007402) 5.2.4.1 Description The low noise amplifiers used are double stage solid-state low-noise amplifiers. Class A circuitry is used in the units to ensure excellent linearity 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 failure then the entire amplifier should be replaced.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 F E D C B A 2 11-007302 380-500MHz 20dB 10-24V DC ******** **/**/20** DE V ICE S 0086 AFL 19 OUT IN 34 IN 4 PLACES see note 2 28 see note 2 31 CHKD 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-25 of 69 APPD IB 9/7/02 DATE 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED CB DBS DRAWN 2 NO DECIMAL PLACE ± 1mm ONE DECIMAL PLACE ± 0.3mm TWO DECIMAL PLACES ± 0.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 F E D C B A CHKD 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-26 of 69 APPD IB 5/7/02 DATE 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED CB DBS DRAWN RF INPUT 1 51R R1 11303-3 CP L1 C4 1nF C3 3.3pF 2 NO DECIMAL PLACE ± 1mm ONE DECIMAL PLACE ± 0.3mm TWO DECIMAL PLACES ± 0.1mm TOLERANCES - L4 S 330nH D G D Ø1.6x6 turns SCALE 3 S L2 CLY 2 TR2 CLY 2 1nF G TR1 Ø1.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 F E D C B A CHKD 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-27 of 69 APPD IB 8/7/02 DATE 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED CB DBS DRAWN RF IN 1 -ve 5V 75mA -ve 5V 75mA DC INPUT 3 2 NO DECIMAL PLACE ± 1mm ONE DECIMAL PLACE ± 0.3mm TWO DECIMAL PLACES ± 0.1mm TOLERANCES 3 SCALE THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 F E D C B A CHKD A B V _IN 1 2 2 1 J1 J5 2 2 1 J4 J3 J4 1 2 J5 J3 1 1 J1 P1 J2 2 >12V DC I/P J2 + + C13 10u 1u C4 ZD3 5.
5.2.6 3 Stage Amplifier Alarm Boards (12-002201) 5.2.6.1 Description Amplifier Alarm Boards are fitted to monitor the bias conditions of AFL Class A amplifiers which remain constant in normal operation. Any departure from normal bias conditions is a result of device failure, excess temperature, over-driving or oscillation (excessive power). In normal operation, the Class A bias circuit of the amplifier develops a constant voltage of 1.20V across the collector current setting resistor.
5.2.6.2 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: 15-way 0.
5.2.6.3 List Drg. Nō.
5.2.6.4 Drg. Nō.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 Generic Rack Shelf Enclosure Alarm Wiring Sketch 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-33 of 69 M L K J I H G F E D C D1 1.
9 Way Channelised UHF Cell Enhancer Maintenance Handbook H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 Page:-34 of 69
5.2.7 450MHz 20W Power Amplifier (12-004201) 5.2.7.1 Description The power amplifiers fitted to this unit are multi-stage, solid state power amplifiers. Class A circuitry is employed throughout the units to ensure excellent linearity over a wide dynamic frequency range. All the semi-conductor devices are very conservatively rated to ensure low device junction temperatures and a long, trouble free working lifetime. The power amplifiers should require no maintenance over their operating lives.
5.2.7.3 Drg. Nō.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 F E D C B RF INPUT C8 220pF C1 56pF C3 1uF C2 1-14pF FB1 IN REG.
5.2.7.5 1 CIRC. REF. A B Drg. Nō. 12-004270C1, PA Parts List(1) 2 3 C1 93-200006 56pF CHIP CAP 10% TOL.
5.2.7.6 1 CIRC. REF. A B Drg. Nō. 12-004270C2, PA Parts List(2) 2 3 4 5 DESCRIPT ION AFL ST OCK REF. TR1 REFER TO GA 12-004201 FOR DETAILS TR2 REFER TO GA 12-004201 FOR DETAILS REG1 94-300002 LM337T, VOLTAGE REGULATOR REG2 94-300002 LM337T, VOLTAGE REGULATOR D1 94-120006 2OTQ45 45V DUAL SCHOTTKY DIODE R1 93-540075 1R2 2.
5.2.7.7 Drg. Nō.
5.2.8 Single DC/DC Converter (13-001702) 5.2.8.1 Description This unit it is used to derive a fixed voltage power supply rail from some higher voltage. Typically, it is used to derive 5V, 8V, 12V or 15V from a 24V input. This particular regulator is dedicated to supply 12.8V DC. The circuit is based upon an LM317 variable voltage regulator, which is capable of supplying a maximum of 1.5A output current.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 MNR 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-42 of 69 + 13-001725 C3 + C2 A FL Ltd BB APPD 12/7/00 DATE REG1 R3R2 R1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED GB CHKD DRAWN C4 D1 ACTUAL SIZE C1 + TB1 USED ON NOTE 24 REG1 R3 R2 R1 6 26 1 1 IN 2 PLACES 26 25 23 PART SECTION SHOWING POSITION OF C/BORE SCALE 2:1 (SEE B.o.
H/book Number:-50-025301HBKM Issue No:-1 Date:-04/07/2003 F E D C B A 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-43 of 69 BB APPD 13/7/00 DATE 1 D1 C1 2u2 1N4003 + 3 VIN 2 NO DECIMAL PLACE ± 1mm ONE DECIMAL PLACE ± 0.3mm TWO DECIMAL PLACES ± 0.1mm 3 SCALE THIS IS A PROPRIETARY DESIGN OF AERIAL FACILITIES LTD. REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS PERMISSIBLE ONLY IF EXPRESSLY AUTHORISED IN WRITING BY AERIAL FACILITIES LTD.
5.2.9 24V Single Relay Board (80-008902) 5.2.9.1 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.
5.2.9.2 Drg. Nō.
5.2.10 24V 410W Power Supply (96-300054) 5.2.10.1 Description The power supply unit is a switched-mode type capable of supplying 24V DC at 17.0Amps continuously. Equipment of this type typically requires approximately 8.0 Amps at 24V 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 24.5V.
5.3 VTA Downlink Channel Shelf (50-025304) 5.3.1 UHF 3dB Splitter (05-002603) See section 5.2.1 5.3.2 4-Way Splitter (05-003401) 5.3.2.1 Description The Splitter/Combiners used are devices 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. 5.3.2.
5.3.3 Channel Control Module (17-002101) 5.3.3.1 Description The purpose of the channel control modules is to change the channel selective module frequencies by means of a series of D.I.P switch banks, each switch corresponding to a different ‘frequency bit’. 5.3.3.2 Technical Specification Below shows the pin assignments for each switch on a channel control module.
5.3.3.3 VHF/ UHF 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).
5.3.3.4 VHF/ UHF Programming Example Frequency required: 465.5MHz Channel spacing: 12.5 kHz Synthesiser offset: 21.4MHz The Local Oscillator frequency is therefore: 465.4 – 21.4 = 444.0MHz Dividing the LO frequency by the channel spacing of 0.0125MHz: 444.0 = 35520 0.0125 This is an integer value, therefore it is OK to proceed. Local Oscillator Frequency of 444.
5.3.4 Channel Selectivity Module (17-010601) 5.3.4.1 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.
5.3.4.2 Drg. Nō.
5.4 VTA Uplink Duplexer Shelf (50-025305, 4U Chassis) 5.4.1 5.5 Bandpass Filters (02-011204 & 02-013401) See section 5.1.1 VTA Uplink Amplifier Shelf (50-025306, 8U Chassis) 5.5.1 20Watt Class A Power Amplifier (12-016301) 5.5.1.1 Description This amplifier is a Class A 20W power amplifier with a frequency range from 380MHz to 470MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss (RL).
Issue No:-1 Date:-04/07/2003 H G F E D C B A 9 Way Channelised UHF Cell Enhancer Maintenance Handbook Page:-54 of 69 1 THIRD ANGL E PROJECTION RF I NP UT CON 1 CON 1 A2 A1 2 DE S CRIP TI ON IS S UE PROTOTYPE ISSUE AA No ECN2882 R3 SAT CP L1 HY 45B PRODUCTION ISSUE(ECN2737) R4 100R +24V ZD2 5. 1v R31 3 ZD1 5.
5.5.2 Automatic Gain Control (17-001101, Det. & 17-001201, Atten.) 5.5.2.1 Description The equipment is fitted with an Automatic Gain Control (AGC) system. This is generally fitted in the Uplink path (not usually needed in the downlink path, as the signal here is at an almost constant level), to avoid overloading the amplifiers (with the associated performance degradation) should a mobile be operated very close to the unit. Normally the attenuator is at minimum attenuation.
5.5.2.2 Technical Specification PARAMETER Frequency Range: Attenuation Range: Attenuation Steps: VSWR: RF Connectors: Power Handling: attenuator: detector/amp: Temperature Range: operation: storage: attenuator pcb Size: detector/amp pcb attenuator: Weight: detector/amp: SPECIFICATION up to 1000MHz 3 to 30dB continuously variable better than 1.
5.5.2.3 Drg. Nō.
5.5.2.4 Drg. Nō.
5.5.2.5 Drg. Nō.
5.5.2.6 Drg. Nō.
5.5.2.7 Drg. Nō.
5.5.2.8 Drg. Nō. 17-001270C, AGC Attenuator Parts List All other modules in this shelf are described elsewhere in this document.
6. INSTALLATION 6.1 Initial Installation Record When this equipment is initially commissioned, please use the equipment set-up record sheet in Appendix A. This will help both the installation personnel and AFL should these figures be needed for future reference or diagnosis.
7. MAINTENANCE 7.1 7.1.1 General Procedures Basic Fault Finding 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 within shelves or trays and all housed within a standard 19” rack type cabinet.
7.1.2 Downlink Confirm that there is a signal at the expected frequency and strength from the base station. If this is not present then the fault may lay outside the system. To confirm this, inject a downlink frequency signal from a known source at the master site BTS input and check for output at the remote site feeder output. If a signal is not received at the output it will be necessary to follow the downlink path through the system to find a point at which the signal is lost.
7.1.5 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. 7.1.6 Service Support Advice and assistance with maintaining and servicing this system are available by contacting Aerial Facilities Ltd. 7.
7.3 7.3.1 Care of Modules 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.
5) If the amplifier to be removed has a heatsink attached, there may be several different ways it can have been assembled. The most commonly used method, is screws through the front of the heatsink to threaded screw holes (or nuts and bolts), into the amplifier within the main case. If the heatsink is mounted on the rear of the main case (e.g.
APPENDIX A INITIAL EQUIPMENT SET-UP CALCULATIONS GENERAL INFORMATION Client Name: AFL Equip. Model Nō. Site Name: Date: Model ANTENNA SYSTEMS Gain Azimuth Comments Type Loss Comments A - Service Antenna B – Donor Antenna Length 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 Comments Input signal level (G) CE max.