Next Generation Signal Enhancement Figure 13: Password Setting 6.3. Block Description Main constituents of the system are: I) Master Optical Unit (MOU) The MOU is installed at the indoor location close to the BTSs. In the DL path, the received RF signals from the BTSs are fed to the MOU, which converts the RF signals to a stream of optical signals to be applied to the optical fibers for transmission to the DBROUs installed at different locations.
Next Generation Signal Enhancement Modules in the MOU a) Duplexer: It is provided in the RF path interfacing BTSs for providing isolation between the DL & UL frequency bands. One duplexer is equipped for each band. b) Optical Transmitter Unit (OTX): It receives RF signals in the preset frequency bands in the DL path & converts the same to the optical signals in 1310 nm wavelength at a level of –1.5±1dBm for application to the optical fiber.
Next Generation Signal Enhancement III) Dual Band Remote Optical Unit (DBROU): As indicated earlier, maximum up to 8 DBROUs are located at different sites as per requirement. The DBROU shall be installed at indoor location for providing coverage in the targeted area.
Next Generation Signal Enhancement of server antennas mounted at the appropriate indoor locations. The antennas should be of appropriate gain & required frequency band. 7. BTS LinK-208 Repeater Specifications 7.1. Electrical Specifications-RF & Optical S.NO. Parameter 1. Optical Wavelength (TX) Optical Wavelength (RX) Frequency Band 2. 3. 4. 5. 6. 6. 7. 8. Specifications MOU 1550 nm 1550 nm 1310 nm Same as indicated in Same as indicated in clause 5.1 clause 5.1 -1.
Next Generation Signal Enhancement 4. 5. Housing Color Cooling Grey Grey Convection Convection 7.5. Environmental Specification Conditions Specification -5oC to +55 0C (+230F to +1310F) Operating Temperature Storage Temperature Enclosure -300C to +750C (-220F to +1670F) In accordance with Indoor application 7.6.
Next Generation Signal Enhancement • The connectors are very delicate in nature therefore proper aligning without applying excessive force should carry out removal & insertion. 8. Installation 8.1. Preparation Sheet-Pre Installation 1. General Application: Indoor Frequency Bands: Cellular Frequency Band DL: 869 MHz to 894 MHz Frequency Band UL: 824 MHz to 849 MHz PCS Frequency Band DL: 1930 MHz to1990 MHz Frequency Band UL: 1850 MHz to 1910 MHz Number of DBROUs installed at different sites: 2.
Next Generation Signal Enhancement Date:…………. Prepared by………………………. Site Address:…………….. 8.2. MOU Installation As mentioned earlier in this document, the MOU is placed at indoor location, which is close to the BTS from where the signals are to be fed through directional coupler. Following points need consideration: • The MOU should be installed at the spot where optical fiber ends are terminated and is a secured place where unauthorized access can be avoided.
Next Generation Signal Enhancement a. Continuity/short circuiting of RF coaxial wherever used should be checked before making connections. b. Continuity of each fiber to the respective ROU should be ensured. c. The system should not be switched ON till the installation is completed and certain settings for the system is made. d. No optical connector should be left open.
Next Generation Signal Enhancement 8.3. Optical Fiber Cable Laying The connectivity between the MOU and the DBROUs at different sites is through optical fibers. In case the fibers are not available, the laying of optical fiber cable has to be under taken. Single mode fibers are in use for which two fibers are required between the MOU and each of the DBROUs. Depending on the situation, the type of optical fiber cable could be of aerial type or of buried type.
Next Generation Signal Enhancement • All technical specifications from the OFC supplier should be followed. • The termination of OFC at each end should be done at FDFs, which should be located close to the equipment. • Connection between the OFC (terminated at FDF) and the equipment should be carried out through optical jumpers with FCPC connectors. 8.4. Installation-DBROU Following points need to be considered • Availability of AC in the range 100-240 V 47/63 Hz for energizing the DBROU.
Next Generation Signal Enhancement To Antenna Optical In port Optical out port Figure 17: Terminations at Different ports in DBROU Commissioning DBROU: • After making the desired connections, Switch “ON” The power • • • supply. Check the LED status at DBROU. Measure the Optical Output Power. It should be +4±1dBm. If any Parameter is not within the specified limits, check the connections and observe alarms. 8.5. Dos & Don’t Dos 1. The BTS-208 system is comprised of independent unit’s viz.
Next Generation Signal Enhancement of water in the equipment. 8. There should be adequate separation between the antenna system and power lines. 9. The Master unit draws RF input from BTS; its level should not be excessively high for satisfactory performance. 10. The optical fiber termination should be carried out with care and no optical port should be left open when the system is ON. 11. Bending of optical fiber cable at acute angles must be avoided 12.
Next Generation Signal Enhancement 1. 2. 3. 4. 5. 6. 7. Grounding of the unit Cable from coupler terminated at donor (BTS) port Termination of optical fibers for different ROUs & no optical fiber port is left open. Two fibers are provided for each ROU. -48 V DC cable connected to the Master unit RF Cable protection ensured and outdoor connections are waterproof Precautions against excessive bending of optical cable. Labels showing cautions displayed C. Master Unit Setup S.NO. Point(s) To Be Verified 1.
Next Generation Signal Enhancement Date Of Installation:------------------------ Repeater ID:------------------------------- Site Address:-------------------------------------------------------------Name of the Installer:----------------------------------------------------- 9. System Maintenance 9.1. General The system normally operates without any operator intervention or maintenance.
Next Generation Signal Enhancement Observation Remark No RF power is available in any of the DBROUs connected to the MOU. Check if the MOU is ON. If it is not ON, please check the availability of –48 V DC for MOU. Make sure that –48 V is available. Check the alarms, if Laser diode/photo diode failure is indicated. Verify functioning of OTX unit by replacing with working/good unit. Also clean the optical connectors wherever provided. Check the optical power at each port connected to the DBROUs.
Next Generation Signal Enhancement FCC & IC Statements: FCC ID:S3CBTSLINK208 This device complies with Part 2, 15, 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 Information: Trade Name: SHYAM BTS Link-208 Repeater Model No.
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) Email: info@shyamtelecom.com For Europe Shyam Telecom GmbH. Frohsinnstrasse 16, 63739 Aschaffenburg, Germany Tel: + 49-6021-45901-0 Fax: + 49-6021-45901-29 Email: service@shyamtelecom.com For ASEAN & Others Shyam Telecom Ltd.
