M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
3 Board
Issue 01 (2006-11-18)
Huawei Technologies Proprietary
3-47
3.15 SCU
3.15.1 Functions
The SCU is a transmitting unit of four carriers in one (4-in-1). It performs broadband
combining with 3 dB power loss bridge. The joint operation of the SCU and the CDU can
realize the combining transmitting of multicarriers. Then the number of CDU and the cost are
reduced.
The SCU supports the following frequency bands:
!
GSM900
!
GSM1800
!
GSM1900
The maximum input power of its single port is 60 W.
3.15.2 Structure and Principle
shows the functional structure of the SCU.
Figure 3-33
SCU functional structure
SCU
Transmitting
Output
1
2
Combiner
3
4
Combiner
Combiner
3.15.3 Panel
shows the SCU panel.