because in this voltage harmonics are not present
By BTS, do you mean Base Transceiver Station? Such equipment can be found in cell phone towers. Usually a BTS runs on 48V DC.
GSM900 transmitted power from BTS: 39dBm GSM1800 transmitted power from BTS: 36dBm
This is bcoz we need -48V for Gsm BTS, -48 DC is used to control Fluctuation So the main function of this is 1) To convert AC to DC 2) To control overloading
-48 v is given to BTS because in this voltage Noise generation is minimum. Because two terminal comes out from the battery and through red color wire we ground the +ive terminal so that possibility of noise interference will get zero because noise occurs only in the +ive terminal that's why we use -ive voltage in the BTS.
All telephone exchanges use -48V DC Power supply. The negative potential is used to prevent electrolysis deposition at Battery terminals. Telephone normally work with about 30ma current driving a line impedence of about 1600 ohms (to drive about 5KM distance). Hence 30ma*1600 ohms=48 volts.
main component of nokia bts is 1)trx which contains 8 slots for call receive and transmit to another mobile station through radio interface 2)second one is psu (power supply unit) which produces the power to bts to get the operation 3)third one is bb(base band) card which support two trx in operation 4)rest of parts is boa,coupler,combiner,duplexer etc
600 WATT
3g BTS is greater than 2g bts. and it is with new technologies.
it is a unit in a BTS i.e. base transreciever system..these bts are installed with towers that are used for mobile communication. The piu consists of a power plant and battery bank. power plant has rectifier to convert ac to dc and battery back up is used in case of power failure.
fifa is a transmission module with support for 16 E1 channels, it receives DC power from BTS through its backplane connectors; power consumption of a fully equipped FIFA is less than 76 w.
Indoor BTS: It is placed in a shelter Air-condition is must Very sensitive Outdoor BTS: No shelter required Air-condition is not a must Not very sensitive comparing to indoor bts
typically 2km