Channelised Bi-Directional RF Amplifier Operation & Maintenance Manual For Dicarlo Associates, Inc. AFL product part Nō.: 50-063701 Denver Channelised CE User/Maintenance Handbook Handbook Nō.
Table of Contents AMENDMENT LIST RECORD SHEET ................................................................................................. 4 INTRODUCTION ....................................................................................................................................... 5 Scope...........................................................................................................................................................................5 Purpose..............................
5.1.6.1 Description .......................................................................................................................................36 5.1.6.2 Technical Specification ....................................................................................................................36 5.2 5 Channel UHF Downlink Shelf 50-063703 .............................................................................................37 5.2.1 3dB Splitter 905-002603) See section 5.1.2 ...............
AMENDMENT LIST RECORD SHEET Issue Nō. 1 2 Date Page No.’s Amended Reason for new issue 29/09/2003 Incorporated by CMH 03/11/03 PLB 8 Add FCC RF exposure Note 1st Issue Document Ref:-50-063708HBKM Denver Channelised CE User/Maintenance Handbook Handbook Nō.
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.
Glossary of Terms Repeater or Cell Enhancer Band Selective Repeater Channel Selective Repeater BTS C/NR Downlink (D.L.) Uplink (U.L.) RSA 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 Denver Channelised CE User/Maintenance Handbook Handbook Nō.
1. 1.1 SAFETY CONSIDERATIONS 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.
1.3 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 equipment covered in this manual is a UHF Bi-directional Amplifier (also known as a Repeater). Its main sphere of application is in urban areas where the topography is such that shadows occur in the propagation pattern (for example within large buildings, conference centres and tunnels, etc.
For better understanding of the system, the system diagram on page 23 should be consulted. Downlink path Duplex system signals in the Downlink path arriving at Base Antenna port 2 are first passed to the Base side chassis and so through a duplexed bandpass filter to ensure good input selectivity. This is then followed by a 31dB gain LNA to provide some amplification and a switchable attenuator then allows up to 30dB of gain adjustment in 2dB steps.
The Uplink duplex channel frequencies are factory set: 452.050MHz 453.225MHz 452.300MHz 452.775MHz The four Uplink duplex channels arrive in the Base side chassis and pass through a 21dB gain then a 15dB gain LPA driver before a 23dB gain 20Watt Power Amplifier. There is an isolator fitted at the PA output to provide protection from the Uplink simplex channel path. A 2 way combiner then combines the four duplex channels with the simplex channel and a bandpass filter then connects to the Base Antenna port 2.
3. SPECIFICATION 50-063701 Parts Lists 3.1 50-063702 50-063703 50-063704 50-063705 50-063706 50-063707 97-500033 97-500065 3.1.
3.1.
3.1.
3.1.4 Tunnel side UHF Duplex/PA Shelf 50-063705 Parts List 02-010701 10-000701 11-006102 11-007302 11-007402 12-016301 13-001803 17-004327 17-004730 19-000826 19-001021 19-001024 80-063820 91-030002 91-130005 91-500001 91-600014 91-600015 91-600019 91-640004 91-660001 96-110021 96-110034 96-700034 96-700035 97-400002 5POLE COMBLINE BANDPASS FILTER 1/4Watt 0-30dB SWITCHED ATTENUATOR LPA 380-500MHz 1Watt LNA. 380-500MHz 20dB LNA.
3.1.5 UHF Simplex Shelf 50-063706 Parts List 02-010701 08-930003 10-000701 11-006102 11-007402 13-001803 13-002811 17-001201 17-002802 17-004327 17-004730 17-010802 19-000826 19-001021 19-001024 20-001601 91-030002 91-130005 91-500001 91-600014 91-600015 91-620001 96-110034 96-700034 96-700035 97-400002 5POLE COMBLINE BANDPASS FILTER 2 PORT ISOLATOR 360-470MHz SMA 1/4Watt 0-30dB SWITCHED ATTENUATOR LNA 380-500MHz 1Watt LNA.
3.1.
3.2 Technical Specification PARAMETER SPECIFICATION Frequency range: 457.0-458.5MHz (Downlink) + 452.850MHz 452.0-453.5MHz (Uplink) Bandwidth: 1.5MHz Gain: 80dB (70dB +/- 10dB) Gain Adjustment: 0 - 30dB (in 2dB steps) Channel Bandwidth: 15kHz Channel Selectivity: > 20dBc at +/-12.5kHz Uplink Power output: +23dBm per channel Downlink Power output: +23dBm per channel OIP3: Uplink +50dBm Downlink +54dBm In-band Spurious Noise Figure: <-36dBm (30kHz B/W) ALC: Fitted in each channel module VSWR: better than 1.
3.2.1 Channel Module Frequencies Frequency (MHz) 457.050 (Downlink) 457.300 (Downlink) 457.775 (Downlink) 457.850 (Downlink) 458.225 (Downlink) 452.050 (Uplink) 452.300 (Uplink) 457.775 (Uplink) 453.225 (Uplink) Frequency (MHz) 452.850(Uplink) 452.850(Downlink) 17-003012 Duplex Channel Modules Bandwidth Gain ALC 15kHz 15dB -25dBm 15kHz 15dB -25dBm 15kHz 15dB -25dBm 15kHz 15dB -25dBm 15kHz 15dB -25dBm 15kHz 15dB -23dBm 15kHz 15dB -23dBm 15kHz 15dB -23dBm 15kHz 15dB -23dBm Qty.
3.3 Mechanical Specification PARAMETER Height: Width: Depth: Case (rack) size: operational: storage: Weight: Humidity: RF Connectors: Environmental Protection: Shelves: Finish: Heatsinks: Handles: Temperature Range: Supply Cable: * SPECIFICATION 38U Eurorack (1U=44.5mm) 600mm 600mm -30°C to +60°C -40°C to +70°C >100kg* 10 – 90% non-condensing N type female IP40 Alocrom Black anodised Alloy Unit supplied with suitable supply input leads with connector and specified length of cable.
4. SYSTEM DRAWINGS Drg. Nō. 50-063751, Channelised Cell Enhancer Rack Layout Drawing 4.
Handbook Nō.-50-063708HBKM Issue No:-2 Date:-03/11/2003 H G F E D C B A User/Maintenance Handbook Denver Channelised CE Page:-23 of 51 1 THIRD ANGL E PROJECTION ANT FACING BASE 1 50-063706 UHF SIMPLEX CHASSIS,4U ANT FACING BASE 2 1 2 DE S CRIP TI ON PRODUCTION ISSUE No ADDING TEXT 1A IS S UE LNA 31dB GAIN 11-007402 SPLITTER 05-002603 LNA 31dB GAIN 11-007402 1B BANDPASS FILTER 451.5-453MHz 02-010701 BANDPASS FILTER 452-453.
Handbook Nō.-50-063708HBKM Issue No:-2 Date:-03/11/2003 F E D C B A CHKD User/Maintenance Handbook Denver Channelised CE Page:-24 of 51 APPD BB 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED RB A e ri a l F a c i l i t i e s L im i te d 22/09/03 DATE 177.50 2 482.60 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.
Handbook Nō.-50-063708HBKM Issue No:-2 Date:-03/11/2003 F E D C B A CHKD User/Maintenance Handbook Denver Channelised CE Page:-25 of 51 APPD BB 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED RB A e ri a l F a c i l i t i e s L im i te d 22/09/03 DATE 177.50 2 482.60 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.
Handbook Nō.-50-063708HBKM Issue No:-2 Date:-03/11/2003 F E D C B A CHKD User/Maintenance Handbook Denver Channelised CE Page:-26 of 51 APPD BB 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED RB A e ri a l F a c i l i t i e s L im i te d 22/09/03 DATE 177.50 2 482.60 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.
Handbook Nō.-50-063708HBKM Issue No:-2 Date:-03/11/2003 F E D C B A CHKD User/Maintenance Handbook Denver Channelised CE Page:-27 of 51 APPD BB 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED RB A e ri a l F a c i l i t i e s L im i te d 22/09/03 DATE 177.50 2 482.60 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.
Handbook Nō.-50-063708HBKM Issue No:-2 Date:-03/11/2003 F E D C B A CHKD User/Maintenance Handbook Denver Channelised CE Page:-28 of 51 APPD BB 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED RB A e ri a l F a c i l i t i e s L im i te d 22/09/03 DATE 177.50 2 482.60 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.
Handbook Nō.-50-063708HBKM Issue No:-2 Date:-03/11/2003 F E D C B A CHKD User/Maintenance Handbook Denver Channelised CE Page:-29 of 51 APPD BB 1 ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED RB 22/09/03 DATE A e ri a l F a c i l i t i e s L im i te d MNR DRAWN 1 482.60 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. SUB-UNIT MODULES UHF Duplex Shelf 50-063702 5.1 5.1.1 Bandpass Filter (02-010701) 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.
5.1.2 5.1.2.1 3dB UHF Splitter (05-002603) 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 over the specified frequency range and ensuring that the VSWR and insertion losses are kept to a minimum. 5.1.2.
5.1.3 5.1.3.1 Ferrite Isolator (08-930003) Description The purpose of fitting an isolator to the output of a transmitter in a multi-transmitter environment is such that each output is afforded a degree of isolation from every other. Were this not to be the case, two simultaneous transmissions could interfere to create intermodulation products, especially in the non-linear power amplifier output stages of the transmitters.
5.1.4 5.1.4.1 ¼Watt 0- -30dB Switched Attenuator (10-000701) 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. 5.1.4.2 Switched Attenuators The AFL switched attenuators are available in two different types; 0 – 30dB in 2 dB steps (as in this case), or 0 – 15dB in 1 dB steps.
5.1.5 5.1.5.1 Low Noise Amplifiers (11-006102, 11-007302 & 11-007402) Description The low noise amplifiers used are double stage solid-state low-noise amplifiers. 11006102 is a low noise amplifier with a 1Watt power device in its final stage, enabling it to be used as a driver for the 20W power amplifier. Class A circuitry is used in the units to ensure excellent linearity over a very wide dynamic range. The two active devices are very moderately rated to provide a long trouble-free working life.
5.1.5.3 Technical Specification, 11-007402 PARAMETER Frequency range: Bandwidth: Gain: 1dB Compression Point: 3rd order intercept: Input/Output return loss: Noise figure: Connectors: Supply: Weight: Size: operation: Temperature range storage: 5.1.5.4 SPECIFICATION 380-500MHz <140MHz 30-32dB +22dBm (typical) +34-35dBm (typical) >20dB <1.3dB SMA female 300-330mA @ 24V DC <300gm 90 x 55 x 30.
5.1.6 5.1.6.1 20W Power Amplifier (12-016301) Description This amplifier is a Class A 20W power amplifier from 380MHz to 470MHz in a 1 stage balanced configuration. It demonstrates a very high linearity and a very good input/output return loss. A built in a Current Fault Alarm Function monitors DC conditions to both transistor collectors and gives an alarm upon bias change.
5.2 5 Channel UHF Downlink Shelf 50-063703 5.2.1 3dB Splitter 905-002603) See section 5.1.2 5.2.2 3 Way Splitter/Combiner (05-003803) 5.2.2.1 Description The 3 way Splitter/Combiner used is a ‘Zinger’ type design for accurately matching three RF signals to a single port, whilst maintaining an accurate balance between ports, and ensuring that the VSWR and insertion losses attain the best possible specification. They are specialist passive devices and must be replaced in the unlikely event of failure.
5.2.3 5.2.3.1 Dual DC/DC Converter (13-001803) Description This unit is employed where it is necessary to derive two fixed voltage power supply rails from some higher voltage. Typically it is used to derive 5, 8, 12 or 15V from a 24V input. The circuit is based upon a pair of LM257 series variable voltage regulators (LM2576, 12 & 15V & LM2575, 5V), which are each capable of supplying an absolute maximum of 1.5A output current.
5.2.4 5.2.4.1 Channel Selective Module (17-003006) 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.
5.2.4.2 Drg. Nō. 17-003080, Generic Channel Module Block Diagram Denver Channelised CE User/Maintenance Handbook Handbook Nō.
5.2.5 5.2.5.1 12V Relay Board (20-001601) 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.
5.3 5.3.1 5.3.1.1 UHF Uplink 4 Channel Shelf 50-063704 Four Way Splitter (05-003401) 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. 5.3.1.
5.5 5.5.1 5.5.1.1 UHF Simplex Channel Shelf 60-063706 Simplex Controller PCB (13-002811) Description The Simplex controller logic PCB monitors the receiver squelch output for a signal change and activates the supply switching for either the uplink or down link path accordingly. In normal operation, the low level Rx path is activated, any the associated Tx path is switched off. When a signal is detected by the Rx Squelch module, the Rx squelch output goes low (0v), which triggers the controller logic PCB.
5.6 5.6.1 5.6.1.1 Power Supply Shelf 50-063707 24V, 400W Power Supply Pack (96-300054) 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 10.0 Amps at 24V DC, so the PSU will be used conservatively ensuring a long operational lifetime. No routine maintenance of the PSU is required.
6. 6.1 INSTALLATION Initial Installation Record When this equipment is initially commissioned, please use the equipment set-up record sheet (or similar) in Appendix A. This will help both the installation personnel and AFL should these figures be needed for future reference or diagnosis.
7. 7.1 7.1.1 MAINTENANCE General Procedures 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 within 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.
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.
