Monday, March 31, 2008

About BTS

1. Antenna BTS for the GSM OF and CDMA usually in form of length in it there are two function antenna as transmitter and receiver. Long from antenna depended from its frequency, ever greater frequency of dimension antenna smaller conversely (from principle of pattern antenna = 1/2 lambda). BTS Antenna in general there is two types: OMNI Antenna and PANEL antenna.
At antenna Microwave (MW) Radio, like drum, this is including type of high performance antenna. Usually there is 2 brand, that is Andrew and RFS. Individuality from this antenna high performance is for which is like drum, and there are its cover, so-called radome. Function Radome for example to protect the component antenna, from weather change.

2. Connection from BTS to that BSC usually use the MW radio, because usually only requiring 1x2MBps (E-1). While from BSC to MSC, usually use the Microwave with the big capacities, until 1xSTM-1, or use the connection FO (for the metropolis of).

3. Feeder Antenna have the mean diameter 1 ¼, Longley depended from situation antenna put down in tower, long progressively its feeder damping ever greater.

4. Existing peripheral in Shelter site: BTS, Microwave Indoor of unit and Rectifier system. Have to use the AC as a mean to take care of the temperature in room at optimum temperature (+ 20C) so that lifetime equipment will be awaked. Besides there are systems of security alarm, floods alarm, fire alarm, alarm infrared.

5. BTS is usually rationed by DC supply (- 48 V), what is yielded by Rectifier system. The battery to back up the system if playing dead PLN usually provides with this Rectifier System back up the time range from 2 - 4 hour depended from the design BTS.

6. Because BSC represent the “Controller" from BTS, become this BSC connect with a few BTS, so that " rather visible from outside" BSC site usually have the Antenna MW transmission which is more. Also bigger Site BSC usually, with the existence of peripheral Genset, TRS which is more and so on

7. Grounding BTS usually differed with the lightning rod. Especial functions to take care of the impedance remain to stabilize, preventing leakage of electrics spreads.

 
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