Next Generation Signal Enhancement RF / DBR Series OPERATION & INSTALLATION MANUAL DB6MR20 (Dual Band) Six Sub-Band Repeaters for In-Door Applications FCC ID:S3CDB6MR20 IC: 5751A-DB6MR20 5920 0060 200 December 2008 Proprietary Information The information contained herein is proprietary to Shyam Telecom Limited. Unauthorized access, copy and replication are prohibited.
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 8.8. Dos & Don’t Dos ....................................................................................36 8.9. Display Details of DB6MR20 .................................................................37 9. System Maintenance................................................................................... 38 9.1. General..................................................................................................38 9.2. Preventative Maintenance .................
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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 It 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 DB6MR20 Repeater. 4.2. Scope This document is the product description of the Shyam DB6MR20 Repeater for indoor applications. 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 DB6MR20 Repeater 5.1. General Description The DB6MR20 Repeater System is a designed to provide indoor coverage and can handle signals in up to six sub bands in two of the service bands, used around the World by various service operators. It provides highly selective amplification in the pre-set bands. The details of operating service frequency bands are given below: S.NO. Service Band DL Frequency (MHz) UL Frequency (MHz) 1.
Next Generation Signal Enhancement bandwidth of each. The System is incorporated with monitoring facility through USB port with easy GUI interface. • It sucks signals from the BTS through a DONOR antenna (highly directional outdoor antenna) and distributes the signals to mobile users after amplification through a set of indoor SERVER antenna(s) (omni/ directional) system in the DL.
Next Generation Signal Enhancement DB6R20 unit Figure 1: Typical In-building Coverage 5.2. Typical In-Building Coverage The DB6MR20 repeater is designed to provide optimal coverage over an area of approximately 1,000 to 2,000 sq. meters (10,000 to 20,000 Sq ft.). However, ultimate performance depends on the obstructions blocking/absorbing of the RF signals in side the building and the available forward signal level at the donor antenna.
Next Generation Signal Enhancement • Installed total cable and connector loss of approximately 5 dB (125 feet of typical 1/2” coaxial foam cable). • Interior building structure consists of typical vertical stud and drywall composition. • Isolation between the donor and server antennas should be 15 dB more than the gain of the repeater.
Next Generation Signal Enhancement Ceiling Antenna DB6MR20 Figure 3: Typical Indoor Coverage Application in Train All Rights Reserved Shyam Telecom Limited Page 13/43
Next Generation Signal Enhancement 6. To Get started-Basic Software Control of the System 6.1. General The system 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 Figure 4: Log-in Repeater II) Configuration Configuration means setting different repeater parameters for proper operation. Configuration of Shyam repeaters can be performed locally with a laptop / PC connected to the repeater by means of local USB serial interface cable. Clicking the CONFIGURE on the command bar, displays configuration window. This window allows access to all the configurable repeater parameters. ! SET: This is for updating the repeater parameters.
Next Generation Signal Enhancement Figure 5: Repeater ID/Location Settings Figure 6: Frequency Settings in sub bands All Rights Reserved Shyam Telecom Limited Page 16/43
Next Generation Signal Enhancement Figure 7: Sub Band ON/OFF Settings Sub Band ON/OFF Settings (Figure 7) Depending on the number of sub bands equipped, particular sub bands can be configured as “ON” & others “OFF”. Maximum six sub bands can be equipped. PA ON/OFF (Figure 8) User can set UL and/or DL PA as ON or OFF independently for testing purpose at the time of installation. After completing the installation it must be in ON condition only.
Next Generation Signal Enhancement Figure 8: PA ON/OFF Settings Figure 9: Threshold Settings All Rights Reserved Shyam Telecom Limited Page 18/43
Next Generation Signal Enhancement Figure 10: Attenuation Settings III) Monitoring (Refer Figure 11) Parameter Remarks Attenuation (Band 1 & 2) Displays UL/DL Attenuation inserted in the system in both the bands. Output Power Displays PA output power in UL & DL paths in both the bands. RSSI DL Real time RSSI DL signal strength in both the bands is indicated. Location System location is displayed. Serial Number Serial number (factory settable) is displayed.
Next Generation Signal Enhancement Figure 11: Monitoring Status IV) Alarms (Refer Figure 12) Observation Remarks Synthesizer Fail (UL Failure of synthesizer of a particular sub band either in DL or UL is & DL) indicated by this alarm. PA ON/OFF Indicates the status of PA if it is ON or OFF (manual/auto) to draw the (DL & UL) attention of the maintenance staff. RSSI Low (DL) Indicates that the RSSI has exceeded the lower limit set. RSSI High (DL) Indicates that the RSSI has exceeded the higher limit set.
Next Generation Signal Enhancement Figure 12: Display of Alarms V) Communication (Figure 13) 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. Local and Remote a) Local Connection In this type of connection, user computer COM Port and repeater’s USB Port are connected directly using cable. Steps as indicated below, are followed: • Click the “COMM.
Next Generation Signal Enhancement • Select the Connection Type as “REMOTE”. • Select the computer’s Comm. Port where the wireless Modem is connected. • Click “OK”. • Now click the DIALUP on the command bar to display the DIALUP window. • • Enter / Select the repeater phone number. Click the “DIAL” and wait (maximum 60 seconds) for connection. A message “CONNECTED” will appear on the screen after the modem Connection is established.
Next Generation Signal Enhancement Figure 13: Communication Setting Figure 14: Password Settings All Rights Reserved Shyam Telecom Limited Page 23/43
Next Generation Signal Enhancement 6.3. Block Diagram Description The signals intercepted through the Donor antenna in the DL pass through different devices for further signal processing. Figure 15: Block Diagram DB6MR20 Repeater (3+3 Configuration) (see separate document) 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 stream of weak signals as it passes through passive devices. Four LNAs are provided, two each for individual bands in the UL & DL directions. d. Converter The basic block of converter is comprised 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.
Next Generation Signal Enhancement Figure 17: Typical Server Antennas 7. DB6MR20 Repeater Specifications 7.1 Specification-RF S.N0. Parameter 1. Number of Bands 2. Frequency band uplink 3. Frequency band downlink 4. Number of Sub bands 5. 6. 7. RF output power in DL Gain Spurious Emission 8. Gain variation over temperature 9.
Next Generation Signal Enhancement 7.3. External Electrical Interface Parameters RF port UL RF port DL Specification N-type (F) N-type (F) 7.4. Mechanical Specification Dimensions (w x h x d) 520x400x180 mm (20x15x7 inches) Weight Approx. 20 Kg. (44 lbs.) Housing Indoor application Housing Color Grey Cooling Convection 7.5.
Next Generation Signal Enhancement 8. Installation 8.1. Preparation Sheet-Pre Installation Before the commencement of installation, a preparation sheet is compiled for expected performance & better maintenance. 1.
Next Generation Signal Enhancement Date: Prepared by: ------------- 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 strength from the donor site in order to maximize the repeater’s output and performance, signal strength greater than or equal to -75dBm is desired.
Next Generation Signal Enhancement • • • • Antenna with proper characteristics to maintain adequate isolation to avoid oscillations. Normally, isolation should be 15 dB more than the gain set for the repeater. It should have good front to back ratio. 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 using some type of grounded metal screen or wire mesh (so called chicken wire) between antennas. The following example illustrates a typical signal level at input of the repeater and other losses with final EIRP: Received Signal Level -62 dBm Donor Antenna gain 12 dBi Cable loss (100 ft. of 7/8 inch) 2 dB Input to Repeater -52 dBm Gain of Repeater set 70 dB Output of Repeater +18 dBm Cable loss (100 ft.
Next Generation Signal Enhancement b. RF cable connecting tool for installing connectors. c. Multi-meter. d. Mobile handset loaded with NET engineering software to be used for signal level measurement. e. Magnetic compass for measuring the azimuth of the BTS and repeater site. Donor Antenna Port USB Interface port Server Antenna Port Figure 18: Connections at ports 8.4. Installation Procedure 1. RF cable installation must comply with local or National Electrical Codes.
Next Generation Signal Enhancement • Place short between the center conductor and outer shield using a piece of wire temporarily and check the other end of conductor for any break in the RF cable. 3. Mount the DB6MR20 unit on the intended wall surface using the appropriate screws. 4. Install the indoor coverage antenna according to the antenna manufacturer’s instructions. Connect the RF cable between the indoor antenna and the “MS” port on the DB6MR20 unit. 5.
Next Generation Signal Enhancement 8.6. Commissioning Important:-Repeater should not be connected to Power without termination at the antenna ports. The termination can be carried out either by the antenna connection as well as a dummy load or the 50 Ω terminated connection of a measuring instrument (Power Meter, Spectrum analyzer with appropriate PAD) 1. Plug the power cable to the AC mains and switch ON the unit. 2. Once the repeater is ON, the LEDs will not glow under normal condition. 3.
Next Generation Signal Enhancement 8.7. Checklist – Post Installation After completion of installation, points as stated in the checklist may be verified to ensure that all aspects have been covered. 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. B. Repeater Set Up S.NO. Point(s) To be Verified 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
Next Generation Signal Enhancement 12. Repeater secured & locked Any Other Remark/Comment: Date of Installation: ------------------------ Repeater ID & Site Address: ---------------- Name of the Installer: ----------------------------------------------------- 8.8. Dos & Don’t Dos 1. The site should be accessible for maintenance purposes. 2. Arrangement is to be made to avoid unauthorized access to the repeater. 3.
Next Generation Signal Enhancement 8.9. Display Details of DB6MR20 In order to display the status prevailing in the system, LEDs are provided on the top cover of the housing. These LEDs display the conditions in both the bands. Figure 19: LED Display on DB6MR20 • UL ADJ. will blink when system is in Uplink Alignment mode. • DL ADJ. will blink when system is in Downlink Alignment mode. • ALC LED will blink when, when system is in ALC.
Next Generation Signal Enhancement 9. System Maintenance 9.1. General The system normally operates without any operator intervention or maintenance. In the event of fault, the field replaceable units (antenna & cables) should be checked for faults and the system restored if possible. A 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.
Next Generation Signal Enhancement III) Defective Unit – Replace the unit with a known operational unit. Verify the signal level at the unobstructed test location. If the signal level increases, re-verify the weak coverage area. If the weak coverage area remains marginal, an additional indoor antenna or DB6MR20 may be required to cover the additional area. If the unit is found to be defective, please contact our Technical support team.
Next Generation Signal Enhancement attenuator may be inserted between the donor antenna and the repeater or reduce the forward path signal using the attenuation control with the likely compromise to the overall coverage within the building.
Next Generation Signal Enhancement DB-6R-20 Ceiling Antenna Figure 21: Indoor Application DBR6R20 in a Corridor All Rights Reserved Shyam Telecom Limited Page 41/43
Next Generation Signal Enhancement FCC Statement: FCC ID:S3CDB6MR20 This device complies with Part 2, 22,24 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. IC Statement: Trade Name: SHYAM Dual Band Inddor Repeater Model No.: DB6MR20 IC: 5751A-DB6MR20 This device complies with RSS-131, RSS-102 of the IC Rules.
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 Asia Pacific Shyam Telecom Ltd. 246, Phase IV, UDYOG VIHAR, GURGAON – 122015 (INDIA) Tel: +91-124-4311600 FAX: +91-124-4018117 Email: contact@shyamtelecom.
