Ericsson RBS 2106 Hardware Reference Manual page 58

Radio Base Station
Climate Unit
The climate unit maintains the internal temperature and humidity inside the
cabinet. The climate unit is mounted in the door of the cabinet.
Two types of climate unit are available:
•
•
Number of units: 1
CDU – Combining and Distributing Unit
The CDU is the interface between the transceivers and the antenna system.
All signals are filtered before transmission and after reception by means of
bandpass filters. The CDU allows several dTRUs to share antennas. There
are a maximum of three CDUs in one RBS 2106.
The CDU combines transmitted signals from several transceivers, and
distributes the received signal to several transceivers. The CDU is hardware-
prepared to support EDGE. Two different CDU types are used in the RBS
2106 to support all configurations:
•
•
Number of units: 1 – 3
CXU – Configuration Switch Unit
The task of the CXU is to cross-connect the CDU and the dTRU in the
receiver path. The CXU makes it possible to expand or reconfigure a cabinet
without moving or replacing any RX cables.
The RX inputs/outputs on the dTRU and the CDU are placed in such positions
that they minimise the amount of cable types for connecting the CXU with the
dTRUs and the CDUs.
The CXU is software configured.
Number of units: 1
14 (30)
Combined Climate Unit. This unit provides both heating and refrigeration.
Air-to-Air Heat Exchanger climate unit. This provides heating, and cooling
through forced convection. It has no refrigerating capacity; thus the
cabinet cannot be cooled to a temperature lower than that of the outside
(ambient) temperature.
CDU-F is a filter combiner intended for high capacity solutions.
CDU-G can be configured either for high capacity or for high coverage. It
is a combiner that can be used for synthesizer hopping.
RBS 2106
EN/LZT 720 0222 R3A