UHF 10W Fibre Fed Remote Site User Handbook For EMS Wireless AFL Works Order Nō.: Q112299 AFL product part Nō.: 60-137701 (10W FO Remote) UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
Table of Contents AMENDMENT LIST RECORD SHEET ...................................................................................................4 INTRODUCTION.........................................................................................................................................5 Scope ........................................................................................................................................................................... 5 Purpose ..........................
4.7.2 12V Relay PCB Fabrication Drawing ...................................................................................................... 34 4.7.3 12V Relay Board Circuit Diagram ........................................................................................................... 35 4.8 DC/DC Converter, 24V in, 12V 8A out (13-003011) ............................................................................... 36 4.8.1 Description ................................................................
AMENDMENT LIST RECORD SHEET Issue Nō. A Date 03/02/05 Incorporated by CMH 1 25/05/2005 CMH Page No.’s Amended Reason for new issue 1st Draft 1st Issue Document Ref:-60-137701HBK UHF Fibre-Fed Remote Site User 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.) 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 UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
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.
1.3 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.
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).
1.5 Laser safety General good working practices adapted from EN60825-2: 1994 “Do not stare with unprotected eyes or with any unapproved optical device at the fibre ends or connector faces or point them at other people.” “Use only approved filtered or attenuating viewing aids.” “Any single or multiple fibre end or ends found not to be terminated (for example, matched, spliced) shall be individually or collectively covered when not being worked on.
2. SYSTEM OVERVIEW The equipment is manufactured in standard IP54 19” rack shelves and is powered by the local mains supply. No battery backup is fitted. The remote site receives the master site RF data via a dedicated fibre link. The downlink fibre signals are transmitted to the remote site using 1310nm wavelength laser and the uplink wavelength from remote to master site is 1550nm, using wave division multiplexing to differentiate between the wavelengths.
3. REMOTE SITE BDA (60-137701) 3.1 Remote Site 10Watt BDA Shelf (60-137702) 3.1.P Remote Site 10W BDA Shelf Photographs UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
3.1.1 Remote Site 10W BDA Description The remote site 10W Bi-Directional Amplifier receives downlink signals from the Fibre Optic shelf at port A and passes them through a bandpass filter tuned to the downlink passband (408-411MHz). From there the signal is amplified by a Low Noise Amplifier (+31dB) and a 0-15dB switched attenuator to a 10Watt power amplifier (22dB). A final bandpass filter completes the downlink path to the off-air antenna (port C).
3.1.
3.1.4 Remote Site 10W BDA System Diagram, Drg. Nō. 60-137780 UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
3.1.5 Remote Site 10W BDA Shelf 60-137702 Parts List AFL Part Nō. 02-007302 10-000901 11-007302 11-007402 11-007901 12-005921 12-016302K 17-001105 17-001201 19-001021K 80-008902 91-030002 91-130001 91-500025 91-510004 91-520001 91-600014 91-600015 96-200024 96-300060 96-600003 96-700034 96-700035 96-920022 Part Description SDF C/L5P VAR.BW TOP SMA 40mm POST SW. ATTENUATOR 0.25W 0-15dB LNA. 380-500MHz 20dB (C/W RELAY) GA LNA.
4. SUB-UNIT MODULES 4.1 Bandpass Filters (02-007302) 4.1.1 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 combline design, and are carefully aligned during manufacture in order to optimise the insertion loss, VSWR and intermodulation characteristics of the unit.
Handbook Nō.-60-137601HBK Issue No:-1 Date:-18/03/2005 F E D C B A CHKD UHF Fibre-Fed Remote Site User Handbook Page:-19 of 38 1 AFL IN 2 PLACES 2 22 3 BB APPD 5/5/00 DATE 28 34 IN 2 PLACES 14 22 31 17 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.
4.2 Switched Attenuator (10-000901) 4.2.1 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. The attenuators are located between the first and second stage amplifiers, (fitting the attenuators in any other position would be detrimental to the noise and/or output power performance of the Cell Enhancer). 4.2.
Issue No:-1 Date:-18/03/2005 CHKD 1 20 4 UHF Fibre-Fed Remote Site User Handbook Page:-21 of 38 GB ALL DIMENSIONS ARE IN mm UNLESS OTHERWISE STATED MRB APPD 06/06/94 DATE 1 R1 R3 R 24 18 R2 A TT1 R 25 R 23 R8 R7 20 R6 A TT2 R5 9 R 12 A TT3 R 11 R 19 R 20 10-0725-3 I ss. 3 R 18 A TT4 R 17 VIEW WITH COVER REMOVED R 13 R 14 R 10 AFL NO DECIMAL PLACE ± 1mm ONE DECIMAL PLACE ± 0.3mm TWO DECIMAL PLACES ± 0.
4.3 Low Noise Amplifiers (11-007302 & 11-007402) 4.3.1 Description The low noise amplifier used is a double stage solid-state low-noise amplifier. Class A circuitry is used in the unit 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. There are no adjustments on this amplifier, and in the unlikely event of failure then the entire amplifier should be replaced.
4.3.4 LNA ‘D’ Connector Pin-out details Connector pin 1 2 3 4 5 6 7 8 9 Signal +Ve input (10-24V) GND Alarm RelayO/P bad Alarm Relay common Alarm Relay good No connection TTL voltage set TTL alarm/0V (good) O/C good/0V bad UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
Handbook Nō.-60-137601HBK Issue No:-1 Date:-18/03/2005 F E D C B A 1 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 3 CHKD UHF Fibre-Fed Remote Site User Handbook Page:-24 of 38 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.
4.3.6 Drg. Nō. 11-007402, LNA Assembly With Alarm Relay UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
4.4 1Watt Low Power Amplifier (11-007901) 4.4.1 Description This amplifier is dedicated to be a 1.0 W driver from 380 MHz to 470 MHz. It is a 2 stage amplifier where each stage is in balanced configuration. It demonstrates very high linearity and good input/output VSWR. There is a Current Fault Alarm Function, which indicates failure of each one of the RF transistors by various alarm output options.
Issue No:-1 Date:-18/03/2005 F E D C CHKD UHF Fibre-Fed Remote Site User Handbook Page:-27 of 38 APPD IB 26/06/03 DATE 1 16 4 3 A TTE NTI ON A FL 9 E LE C TR O S TA TI C S E N S I TI V E DE V ICE S C P L1 + 15 IN 14 PLACES O B S E R V E P R E C A U TI O N S FO R H A N D LI N G R1 RF IN C 29 + C32 C 30 C33 2 NO DECIMAL PLACE ± 1mm ONE DECIMAL PLACE ± 0.3mm TWO DECIMAL PLACES ± 0.
4.5 4.5.1 10W Power Amplifier (12-016302) Description This amplifier is a Class A 10W 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 (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. 4.5.
4.6 4.6.1 Wide Dynamic Range AGC (17-001105, Det. & 17-001201, Atten.) Description The equipment is fitted with a wide dynamic range 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.
For small signals, below AGC onset, the output control line will be close to 12V and the AGC attenuator will have minimum attenuation. As the signal level increases the control line voltage will fall, increasing the attenuator value and keeping the system output level at a constant value. The AGC onset level is adjusted by the choice of sampler resistor R1 and by the setting of potentiometer VR1, (factory set @ time of system test) do not adjust unless able to monitor subsequent RF levels.
4.6.3 Drg. Nō. 17-001105, ACG Detector Assembly UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
4.6.4 Drg. Nō. 17-001201, AGC Attenuator Assembly Drawing UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
4.7 4.7.1 24V Single Relay Board (80-008901) 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.
4.7.2 12V Relay PCB Fabrication Drawing UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
4.7.3 12V Relay Board Circuit Diagram UHF Fibre-Fed Remote Site User Handbook Handbook Nō.
4.8 4.8.1 DC/DC Converter, 24V in, 12V 8A out (13-003011) Description The DC/DC converter fitted is a high power modular unit with a 5 amp @ 12V output capability. The circuit is basically an O.E.M semiconductor regulator (one side of which has a heatsink mounting plate, usually bolted to the casing of a Cell Enhancer/rack shelf) with screw block terminations. Note: no circuit diagram of the O.E.M. regulator is available. This unit should not be repaired, only replaced. 4.8.
4.9 4.9.1 JWS150-24/A PSU (96-300060) Description The power supply unit is a switched-mode type capable of supplying 24V DC at 6.25Amps continuously. Equipment of this type typically requires approximately 22.5Amps 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. INSTALLATION 5.1 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. 5.2 Installation & Attenuator Settings The UHF Fibre Optic System comprises a remote site fibre driven 10Watt bi-direction amplifier.
