M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
3 Board
Issue 01 (2006-11-18)
Huawei Technologies Proprietary
3-11
Figure 3-7
CDU (type B) rear panel
0
1 2
3
0
1
2
3
0
1 2
3
0
1
2
3
0
1 2
3
0
1
2
3
MAIN
DIVERSITY
FUSE
MAIN: TMA power feeding selection knob of main receiving channel
DIVERSITY: TMA power feeding selection knob of diversity receiving channel
FUSE: fuse (2 A)
Two knobs shown in
are used to control the current strength of the TMA power
supply.
shows the mapping between the knob setting and the TMA current.
Table 3-6
Mapping between the knob setting and current strength of the TMA (type B)
Setting
Main
Diversity
Unit
0 OFF
OFF
–
1 100 65
mA
2 107 100
mA
3 205 205
mA
Huawei recommends that MAIN and DIVERSITY be set to 100 mA and 200 mA respectively.
CDU (type C)
shows the CDU (type C) rear panel.