-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.
four 12V lead acid batteries.
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
In a 48V DC system you ground the positive to 0V so the live wire will be -48V.
always think of any supply system so : RED = MOST POSITIVE BLACK = MOST NEGATIVE in a telecom system the -48V supply is refferenced to ground and earth, so the supply wire is NEGATIVE, this means a DC supply most positive signal the RED wire, go to EARTH = ZERO, the BLACK wire is the MOST negative, so in this case it is -48V
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.
The correct size of cable depends on the length of the cable run, as well as the voltage and current. Another consideration is what voltage loss is acceptable ? Safest answer would be to use a cable sizing table or online tool: http://www.solar-wind.co.uk/cable-sizing-DC-cables.html Hope that helps. G.
By BTS, do you mean Base Transceiver Station? Such equipment can be found in cell phone towers. Usually a BTS runs on 48V DC.
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
In a 48V DC system you ground the positive to 0V so the live wire will be -48V.
because in this voltage harmonics are not present
24volt dc
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.
FIU use in Bts for large number of channels
always think of any supply system so : RED = MOST POSITIVE BLACK = MOST NEGATIVE in a telecom system the -48V supply is refferenced to ground and earth, so the supply wire is NEGATIVE, this means a DC supply most positive signal the RED wire, go to EARTH = ZERO, the BLACK wire is the MOST negative, so in this case it is -48V
IN BTS -48V IS USED REASON BEHIND IT IS THAT When interference is occur in voltages it affect only positive pulse not in negative terminal so if we make positive common then no interference occur And we get pure -48 volts without any interference. Another reason is that we can use +48 but the lightning has -ve charge due to attraction all the network may destroy so we use the -48 which repel the lightning that make the network safer from great destruction...
DRFU stands for Dynamic Radio Frequency Updating. It is a feature in BTS (Base Transceiver Station) technology that allows for automatic adjustment of radio frequencies based on changing network conditions, such as fluctuating traffic or interference levels. This helps optimize network performance and maintain a high quality of service for users.
because the termination and relays in side the telecoms penal needs for DC supply to continues the protection equipment and relay and purpose of telecoms
"Phantom Power" in use in the recording industry is ALWAYS 48V. Some types of mics use other types of power like T-power or an internal battery, but this is not "Phantom Power".