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User Manual
Airbridge cBTS3612 CDMA Base Station
6) RLDU
RLDU performs low noise amplification and division of the receiving signals,
providing standing wave alarm and forward power checking voltage output, checking
the physical connection of the antenna port and monitoring whether the output of
BRCU, BHPA signals is normal.
III. Antenna & feeder subsystem
BTS antenna & feeder subsystem includes two parts: RF antenna & feeder and
dual-satellite synchronization antenna & feeder. The former mainly transmits the
modulated RF signals and receives MS information while the latter provides precise
synchronization for CDMA system.
IV. Power supply subsystem
Power supply subsystem consists of power input component (EMI filter, lightning
arrester of power supply), high power DC/DC power supply module, power
distribution box, medium/low power DC/DC power supply module for boards (or
modules ).
The power supply subsystem provides power for the whole BTS.
2.2 Baseband Subsystem
2.2.1 Overview
The baseband subsystem is one of the major parts of BTS. Its structure is shown in
Figure 2-2.
2-5
System Description
2 Hardware Architecture
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