Document Title Security Level
2006-10-04 HUAWEI Confidential Page13, Total35
RF subsystem components and their functions
RF
Subsystem
Board or
Module
Function
Antenna Transmits and receives the signals.
Feeder Connects the antenna to the ANTA or ANTB
interface of the DAFU.
RF antenna
subsystem
TMA Amplifies the signals.
DDPU
z Sends the multiple channels of the RF signals
from the transceiver to the antenna through the
duplexer.
z Amplifies the received signals from the antenna
and divides the signals into four parts and then
sends them to the transceiver.
Front-end of
the RF
subsystem
(DAFU)
DCOM Combines the two routes of signals into one route.
RF
transceiver
subsystem
DTRU
(RF)
z Transmits signals.
z Receives signals.
z Combines frequency.
z Performs loop test.
z Amplifies the power
z Outputs the power individually.
z Outputs the combination power.
3.3 System Configuration
The system configuration of the BTS3012 is as follows:
z One BTS3012 cabinet can accommodate 12 TRXs under full configuration.
Under full configuration, there are six DTRUs.
z When a combiner is used, the cell can have up to 8 TRXs if a sector is
equipped with one dual-polarization antenna or two single-polarization
antennas.
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