User Manual
Table Of Contents
- 1. Document History
- 2. Disclaimer
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- 3. Safety Instructions and Warnings
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- 4. Introduction
- 5. Functional Description Of R4 Band Selective Repeater
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- 6. To Get started-Basic Software Control Of the Repeater
- 7. R4 Repeater Specifications
- 8. Installation
- The gain of repeater is set using software control through local USB serial port or optional wireless modem
- 9. System Maintenance
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.
[3] ETS 300 342-3
Radio Equipment and Systems (RES); Electro-Magnetic Compatibility
(EMC) for European Digital Cellular Telecommunications systems. Base
Station Radio and ancillary equipment and Repeaters meeting phase 2
GSM requirements.
4.5. General
Mobile Communications Systems are planned as cellular systems and each
cell of the base station is required to provide RF coverage over a certain
geographical area as per defined RF power levels. Due to the RF
propagation properties, even using high radiated RF powers or complicated
antenna systems, there are zones within the coverage area where the RF
signal strength from base station remains inadequate for establishing the
desired connectivity to mobile users.
Repeaters traditionally are inducted in the Mobile Communication network to
fill in the “Dead Zones” caused by blocking of signals by geographic
topologies such as mountains, valleys, dense foliage, high rising urban
landscapes and other man-made structures. The distance from the base
station also adversely affects the RF signal strength. The user views
repeaters as a means to extend base station coverage so as to reduce the
number of base stations and thereby accelerate network availability.
Repeater systems are installed after meticulous planning between BTSs and
the mobile users to provide RF coverage in the shadowed regions. Repeater
systems are available for different applications and ultimate choice shall
depend on some of the factors mentioned below:
• Area to be provided with coverage.
• Indoor/outdoor coverage.
• Availability of BTSs in the vicinity.
• Antenna isolation to be achieved.
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