Next Generation Signal Enhancement RF / DBR Series OPERATION & INSTALLATION MANUAL DB5R (Dual Band) 850 Cellular & 1900 PCS For Outdoor Applications October 2007 Proprietary Information The information contained herein is proprietary to Shyam Telecom Limited. Unauthorized access, copy and replication are prohibited. This document must not be copied in whole or part by any means or it shall not be disclosed or divulged to any third Party without the prior written consent of Shyam Telecom Limited. .
Next Generation Signal Enhancement Contents 1. Document History ......................................................................................... 4 2. Disclaimer...................................................................................................... 5 3. Safety Instructions and Warnings ............................................................... 5 3.1. Personnel Safety....................................................................................5 3.2. Equipment Safety.......
Next Generation Signal Enhancement 9.1. General ................................................................................................34 9.2. Preventative Maintenance ...................................................................34 .
Next Generation Signal Enhancement 1. Document History Document Document Document Author Edited Number Name date by DB5R Dual Band Repeater Revision Approved by Revision October 2007 Revised Section Date/Sign Intentionally Left Blank .
Next Generation Signal Enhancement 2. Disclaimer Every attempt has been made to make this material complete, accurate, and up-to-date. Users are cautioned, however, that Shyam Telecom Limited reserves the right to make changes without notice and shall not be responsible for any damages including consequential, caused by reliance of the contents presented, including, but not limited to, typographical, arithmetical, or listing errors.
Next Generation Signal Enhancement CAUTION Calls attention to a procedure or practice which, if not followed, may result in personal injury, damage to the system or damage to individual components. Do not perform any procedure preceded by a CAUTION until described conditions are fully understood and met. WARNING! This equipment complies with FCC & IC radiation exposure limits set forth for an uncontrolled environment.
Next Generation Signal Enhancement 4. Introduction 4.1. Purpose The purpose of this document is to describe the electrical and mechanical specifications, operation and maintenance of the DB5R Dual Band Repeater. 4.2. Scope This document is the product description of the Shyam DB5R Dual Band Repeater for outdoor application. 4.3.
Next Generation Signal Enhancement 4.4. References [1] ETS 300 086. Radio Equipment and Systems Land mobile service Technical characteristics and test conditions for radio equipment with an internal or external RF connector intended primarily for analogue speech. [2] ETS 300 609-4. Digital cellular telecommunications system (phase 2): Base Station Systems (BSS) equipment specification: Part 4: Repeaters.
Next Generation Signal Enhancement 5. Functional Description Of DB5R Dual Band Repeater 5.1. General Description The DB5R Dual Band Repeater System is designed to provide outdoor coverage and can handle signals in up to five sub bands with 3+2 configuration (maximum) in two of the service bands, used around the World by various service operators. It provides highly selective amplification in the pre-set frequency bands. The details of operating service frequency bands are given below: S.NO.
Next Generation Signal Enhancement • In the U/L, the signals from the mobile users are picked up by SERVER antenna and retransmitted to the BTS after amplification. • The repeater finds applications in tunnels, highways, large size airports, and open market areas etc. where traffic requirement is high. • The system can be incorporated with optional Remote Management System (RMS) which can be used for configuration and monitoring the status of the link.
Next Generation Signal Enhancement Donor Antenna DB5R Power supply cable Server Antenna BTS Figure 1: DB5R Repeater-Different Constituents .
Next Generation Signal Enhancement Figure 2: DB5R Repeater - Application in a Urban Area .
Next Generation Signal Enhancement 6. To Get started-Basic Software Control Of the Repeater 6.1. General The repeater is equipped with a supervisory module that allows the monitoring and control of various parameters such as RF power, attenuation, temperature, status of door and alarm conditions etc.
Next Generation Signal Enhancement Click on the command bar to display the configuration window, which allows access to all the configurable repeater parameters. User can login for configuration of repeater parameters. • • SET is for updating the repeater parameters. READ is for confirming the parameters set during the configuration. Information as detailed below, can be configured after “Configuration” window is activated: the Figure 3: Login Repeater a.
Next Generation Signal Enhancement d. Thresholds Output Power: Maximum Output Power limit in UL & DL for both the bands are set. A “PA Power high” alarm will be generated when PA power exceeds the upper limit. (Refer Figure 4) e. Thresholds RSSI Limits: Lower and Upper RSSI Limits in DL & UL paths for both the bands are set. A RSSI High alarm will be generated when RSSI exceeds the set upper limit, and a RSSI Low alarm will be generated when RSSI goes below the set lower limit set.
Next Generation Signal Enhancement Figure 5: Monitoring & Alarm window III) Monitoring (Figure 5) In this window, the status of the system is monitored for the following parameters/conditions: S.NO. 1. Parameters/Conditions Remarks Frequency Bandwidth for It displays the bandwidth in DL & UL of each sub band equipped. sub bands 2. RSSI (DL) Band 1 3. RSSI (DL) Band 2 4. Attenuation Band 1 (DL) 5. Attenuation Band 2 (DL) 6. Attenuation Band 1 (UL) 7. Attenuation Band 2 (UL) 8. 9.
Next Generation Signal Enhancement temperature Real time PA output power in dBm. Real time PA output power in dBm. Displays the information about the sub band equipped. for Indicates the temperature of PA. temperature for Indicates the temperature of PA. temperature for Indicates the temperature of PA. temperature for Indicates the temperature of PA. 10. 11. 12. Output Power Band 1(UL) Output Power Band 2(UL) Sub band ON/OFF 13. PA (DL) band 1. PA (DL) band 2. PA (UL) band 1. PA (UL) band 2.
Next Generation Signal Enhancement Monitoring interval is 3 seconds i.e. after every 3 seconds data on the monitoring window is refreshed. A red indication is for Alarm present. A green indication is for No alarm. V) Communication Window (Figure 6) In COMMUNICATION window, user can select serial communication port of the computer and type of connection between repeater and computer. There are two types of connections viz.
Next Generation Signal Enhancement CAUTION When the communication between repeater & PC/Laptop is in progress through USB: 1. Do not remove cable from the USB port. 2. Do not switch off the repeater. In case the communication is not required any more, click at EXIT before removing cable from USB port to avoid hanging of the PC/Laptop. In case the PC/Laptop goes in to hanging mode, it has to be restarted after closing/switching OFF & ON the repeater.
Next Generation Signal Enhancement Figure 7: Password Settings 6.3. Modules In DB5R-Description The signals intercepted through the Donor antenna in the DL pass through different modules/units for further signal processing; the detail explanation is about different modules/units is given below: a. DONOR Antenna Donor antenna of appropriate bandwidth & gain interfaces the BTS on one side and repeater system on other side through RF cable.
Next Generation Signal Enhancement Figure 8: Donor Antenna The Donor antenna with 16 dB gain transfers the intercepted signals to the repeater and transmits uplink signals amplified by the repeater. b. Diplexer The signals received in the DL, through the antenna are split for individual band processing. The dual band outputs are fed to two different duplexers. One Diplexer is also provided before the server antenna in order to distribute combined signals to mobile users.
Next Generation Signal Enhancement e. Converter Module The basic block of converter module comprises of L.O., frequency mixer, filter and intermediate amplifier. The low noise amplified signals are converted to IF in frequency mixer with frequency fed from LO. The signals are passed through sharply tuned filters. Number of converters equipped shall depend on the number of sub bands configured in the system. Two converters (one for DL & one for UL) for each sub band are provided. f.
Next Generation Signal Enhancement Figure 9: Server Antenna .
Next Generation Signal Enhancement 7. DB5R Repeater Specifications 7.1. Electrical Specifications-RF S.NO. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. Parameter Number of Bands Frequency band in DL path. Frequency band in UL path.
Next Generation Signal Enhancement Grey Convection Housing Color Cooling 7.5. Environmental Specification Conditions Specification -35oC to +550C (-310F to +1310F) Operating Temperature -300C to +750C (-220F to +1670F) IP-65 (NEMA 5) Storage Temperature Enclosure 7.
Next Generation Signal Enhancement 8. Installation 8.1. Preparation Sheet- Pre Installation Before the installation commences, a preparation sheet to examine the various requirements is to be compiled as per detail given below: 1.
Next Generation Signal Enhancement 8.2. Engineering Consideration a. Site Selection Site selection is one of the most critical decisions affecting the overall performance of the system. A repeater must be located where it can receive the maximum signal from the donor site in order to maximize the repeater’s output and performance, a signal strength greater than or equal to -75dBm is desired.
Next Generation Signal Enhancement • The beam width for the DONOR antenna should be as small as possible. • The beam width for SERVER antenna is 60 degree to 120 degree. • There should be adequate vertical & horizontal separation between the DONOR & SERVER antennas to avoid interference and noise.
Next Generation Signal Enhancement Cable loss (100 ft. of 7/8 inch) 2 dB Server Antenna Gain 9 dBi Repeater ERP +41 dBm c) Overlapping Coverage Ideally, the repeater system will be engineered with minimal overlapping coverage between the donor base station and the repeater. However, the mobile users will occasionally receive signals from both the donor and the repeater at similar levels.
Next Generation Signal Enhancement The repeater is mounted at the pre-selected site firmly placed with clamps and other mechanical accessories. Connections as detailed are carried out: • RF cable routed from DONOR antenna is connected at the BTS port as indicated. • RF cable routed to SERVER antenna is connected at TX/RX port for signal distribution. • For energizing the system, the cable from AC mains is connected at AC mains port, range 100-240 V.
Next Generation Signal Enhancement Alternatively, RF output power of repeater can be measured using the visual indication shown on the display panel of the repeater. Once the RF output power has been determined, the attenuation will have to be modified to reach the desired output signal level. The gain of repeater can be set using any of the following methods: a. Local manual mode (using built in key pad and display) b. Local USB serial interface mode (GUI based) c. Through (optional) wireless modem. b.
Next Generation Signal Enhancement 11. Gain of the repeater should be set after taking antenna isolation in to consideration. 12. The estimation of coverage area should be confirmed. 13. The system should be made over for normal traffic after actual measurement of: a) RF power in the DL b) RF power in the UL c) Antenna Isolation d) Gain settings in DL & UL 14. Feedback regarding performance of the system must be obtained from the user. .
Next Generation Signal Enhancement 8.7.Checklist – Post Installation After the installation of the system is accomplished, points as indicated in the checklist are verified. Service Bands Particulars: Frequency Band for Band 1 DL Frequency Band for Band 1 UL Frequency Band for Band 2 DL Frequency Band for Band 2 UL A. Repeater Installation S.NO. Point(s) To be Verified 1. 2. 3. 4. 5. 6. 7. Remarks Ensure isolation between server and donor antennas, it has to be 15 dB + Gain set of the repeater.
Next Generation Signal Enhancement 9. System Maintenance 9.1. General The system normally operates without any operator intervention or maintenance. If, in the unlikely event of a unit failure, the field replaceable units (antenna unit, cables) should be checked for faults and the system restored. The faulty unit can be removed and replaced with a spare while the rest of the system is still operating. Soldering or local repair of the modules should be avoided for better maintenance point of view.
Next Generation Signal Enhancement For Technical Support, please contact at any of the following addresses: For Americas Shyam Telecom Inc. 6, KILMER ROAD, SUIT D, EDISON, New Jersy-08817 (USA) For Europe Shyam Telecom GmbH. Frohsinnstrasse 16, 63739 Aschaffenburg, Germany Tel: + 49-6021-45901-0 Fax: + 49-6021-45901-29 For ASEAN & Others Shyam Telecom Ltd. 246, Phase IV, UDYOG VIHAR, GURGAON – 122015 (INDIA) Tel: +91-124-4311600 FAX: +91-124-4018117 Email: contact@shyamtelecom.com .
