USER INST A LLA T ION MA NUA L
INDEX 1. Installation & safety requirements.............................................................................................................................3 1.1. Environmental conditions:...........................................................................................................................3 1.2. Installation site features ..............................................................................................................................3 1.3.
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GENERAL INFORMATION 1. Installation & safety requirements 1.1. Environmental conditions: This equipment is designed for indoor use. Operating temperature: +5 to +40°C Do not install in corrosive atmosphere or in critical environmental conditions such as hazardous classified areas (see appendix G). 1.2.
1.6. Connector care and cleaning Connectors for single mode optical fibre are designed for sub micron tolerances. Such a connector has an optical section of only 9 µm diameter. The optical connector is a high precision device. It must be handled with care, to avoid scratches and other mechanical/optical damages that will impair or reduce the system’s performance The following rules must be carefully followed: ü ü ü ü ü Do not leave optical connectors open, as they will attract dirt.
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BRITECELL FAST 4. System description BRITECELL™ FAST is a plug and play fibre optic distributed antenna kit, offering the most suitable solution for indoor coverage in small areas. The package includes up to four compact RF remote transceivers (TFAF), driven by one local distribution unit (TFLF). It is available in nd rd various frequency ranges (from 800MHz up to 2200 MHz) satisfy the requirements of 2 and 3 generation mobile networks for simple coverage needs.
4.2. Services The BriteCell™ Fast system operates at the following standards: SERVICE BANDWIDTH TRUNKING RADIO AMPS GSM DCS PCS E-GSM 4.3. Uplink [MHz] 806:824 824:849 890:915 1710:1785 1850:1910 880:915 Downlink[MHz] 851:869 869:894 935:960 1805:1880 1930:1990 925:960 Functional description The BriteCell™ Fast system is a fibre optic distribution system for wireless signals. It consists of a donor unit (TFLF) feeding up to 4 remote units (TFAF) in a star topology.
TFLF local unit Store button Fittings for wall fixing Fittings for wall fixing Step attenuator Remote units alarms and link status LEDs Local unit alarms and status LEDs Power supply switch Optical UL/DL connectors to remote units -48VDC input DL/UL RF port to BTS Alarm contacts Remote supply connectors Figure 3 Local Unit (TFLF) MN021-01 Page 8 of 28
5. Functional description 5.1. Block diagram UL manual step Attenuator, 0-20dB E O E O E O E O AGC AGC AGC DL UL AGC UL E O DL DL ALC Alarm Alarm N.O. Relays microcontroller store .. LEDs … DC DC -48V -48V Figure 4 Local Unit (TFLF) Block Diagram The Local unit is the core of the system and provides the following functionalities: • • • • • • • • • RF low power interface and optical conversion. Power supply distribution and short/surge protection. Alarm interface through dry contact.
demodulated back to an electrical signal. The data link associated with each remote unit is also detected and routed to the microprocessor. Amplification & AGC: Variable amplification is needed to compensate for the variable optical fibre loss, maintaining a good signal to noise ratio, so that for each link a constant gain is obtained. RF Combining: Signals coming from all remotes are combined into a single RF path, filtered and duplexed into the RF port. 5.4.
The local unit has different monitor signals, leading to different alarms: ALARM DESCRIPTION UL AGC out of range UL optical power too low DL laser optical power too low UL RF amplifier DL RF amplifier Temperature alarm Supply alarm LED RU1, 2, 3, or 4 RU1, 2, 3, or 4 LU LU LU LU LU STATUS Flashing Fixed Fixed Fixed Fixed Flashing Fixed SEVERITY MINOR MAJOR MAJOR MAJOR MAJOR MINOR MAJOR COLOR Red Red Red Red Red Red Green The Link LEDs (RU1, 2, 3, and 4) report information from the remote units, accordi
STEP SET CONFIGURATION ACTION 1 Install your system properly, according to the required number of remote units, and power up the system. 2 Wait until the communication between TFLF and TFAF’s are established and the alarms relevant to UNUSED port arises (LU LED fixed). 3 Verify that all USED ports don’t have active alarms. In case, please follow the troubleshooting steps to remove unwanted alarms. 4 Press the “store button” for at least 5 second.
7.2. RF Ports The RF port is a duplexed N-female connector. See the tables in the Appendix to set the proper input level. ü WARNING: Do not exceed the maximum RF level allowed for downlink input. See appendix B - technical specifications N-female connector Figure 8 RF Connector for Local Unit TLFL 7.3. Optical fibres connection Optical connectors need to have proper alignment and mechanical support. When inserting an optical connector, take care to handle it carefully to avoid damage to the fibre.
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TFAF remote unit 9.
10. Functional description 10.1. Block diagram Auxilliary External alarms Downlink AGC PHOTODETECTO RX optical power monitor VARIABLE GAIN AMP. Shut down control A DD C PROC µ . DL final amplifier stage current monitor D A C Diff. AMP RF SMA DC loop RF SMA 50 Ω Data link MATCHING NETWORK VOLTAGE CONTROLLED ATTENUATOR attenuator control voltage CURRENT GENERATOR +12 V DC LASER DIODE +5 V MONITOR PHOTODET.
OPTICAL LOSS 0 dB < 3dB < 5 dB > 5 dB OPERATION AGC working, constant RF gain AGC working, constant RF gain AGC not working, RF gain decreases according to 2dB electrical per 1dB optical AGC not working, the optical signal is too low, the receiver is automatically switched off in order to reduce the unwanted noise to the system. ALARM none none AGC out of range: red LED flashes SEVERITY NONE NONE MINOR Optical power too low: red LED fixed, relays alarmed. MAJOR 11. Alarms and settings 11.1.
12. Installing and cabling 12.1. Power supply The system is designed to be powered by standard telecom voltage –48VDC. The power consumption is 12W for the TFAF. The supply connector part name is MOLEX 5569-03. A connectorized jumper is shipped with each remote unit. ü WARNING: The system is connected POSITIVE to GROUND. Grounding connections must be carefully managed in order to avoid reverse polarity mistakes Blue NEGATIVE –48VDC Black GROUND 0V Figure 14 DC Power Connections for Remote Unit TLAF 12.
WRONG OPTIMAL Figure 16 Optical Fiber Connection Examples 12.4. Test point An electrical test point is available on the remote unit to check the downlink optical power. Connect the fibre coming from the local unit, power both units and measure with a multimeter the voltage between ground and the test point. A satisfactory DL optical power will give measurement greater than 300mV, corresponding to an optical power level of around –5dBm. Figure 17 Remote Unit TFAF Electrical Test Point 13.
SYSTEM INSTALLATION 14. Installation and cabling BriteCell™ FAST is designed to be simple and easy to install and commission. It requires a minimum number of tools and equipment. However, it is necessary to observe local regulations when planning and implementing an RF system and safety conventions must be strictly adhered to at all times. Particular attention should be paid to the presence of optical lasers, which can represent the only potential hazard related to the use of BriteCell equipment.
OTHER INFORMATION 17. Warranty conditions Customer service is granted all over the world during and after the warranty period. Allen Telecom warrants to the terms and conditions hereto set forth, all products manufactured by it to be free under normal use and service from defects in materials and workmanship for a period of one (1) year from the date of shipment to the first consumer (the “Warranty Period”).
18. Technical support Our on-line help desk at www.tekmar.it gives immediate access to our team of Experts, who are committed to providing you with the best service in the shortest possible time. For further information on the product, not described in this publication, you can contact our Project Implementation & technical support team at helpdesk@tekmar.it APPENDIX 19. Appendix A : Installation checklist The following checklist provides a summary of the procedures for installing a BriteCell™ Fast system.
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RF SYSTEM PERFORM ANCE TFLF+1 of 4 TFAF ( 1 of 2 TFAF RF por t s ) Downlink Frequency translation Nominal RF input level Max allowed RF input level Nominal RF gain Flatness (in passband) Output wideband noise Max RF output level under ALC (note1) Output 1dB compression point Output spurious and intermodulations RF output power per carrier Output third order intercept point OIP3 Uplink Frequency translation Nominal RF gain (note 2) Flatness (in passband) RF presettable gain reduction (PRG note3) Noise figure
22. Appendix D – Power levels Typical Output levels (dBm) at each TFA RF port versus different modulation scheme. (NB: system gain is 0db, therefore the following values correspond also to min input levels) Carriers CW GSM 900 GSM 1800 CDMA 800 CDMA 1800 Analog IDEN TDMA 800 TDMA 1900 1 2 3 4 +13.0 +10.0 +7.7 +6.7 +19.0 +10.0 +7.7 +6.7 +19.0 +10.0 +7.7 +6.7 +15.5 +10.0 +5.0 +3.5 +14.5 +10.0 +5.0 +3.5 +19.0 +14.0 +12.0 +11.0 +11.0 +8.0 +6.0 +4.5 +19.0 +14.0 +12.0 +11.0 +18.0 +13.0 +11.
24.3. Antennas Positioning Starting with the parameters determined as defined above, the number of radiating points can be defined. The calculations needed can be implemented in a tool. The number of carriers is used to define the TFA/TFAF RF Output Power (P OUT TFA in Figure 18) according to the table in Appendix C. As a rule of thumb, the power values for a double number of carriers is obtained reducing the Power value of 3dB.
25. Appendix G - Classifying hazardous areas Hazardous Area A hazardous area is defined as: "An area in which a flammable substance in the form of gas or vapour or dust, when mixed with air, is present in such proportions that it can explode when in contact with an ignition source.
BriteCell Fast is designed and manufactured by Tekmar Sistemi Srl www.tekmar.it Copyright Tekmar Sistemi s.r.l. This document contains information, which is the property of Tekmar Sistemi S.r.l. The contents are confidential, any reproduction of all or part of this publication, without the written consent by Tekmar Sistemi s.r.l is forbidden. This publication is issued to provide outline information and is not deemed to form any part of any offer and contract.
