Figure 3-15 Ecdu (Type B) Rear Panel; Table 3-12 Mapping Between The Knob Setting And Current Strength Of The Tma (Type B) - Huawei BTS3 Series Hardware Description Manual

M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual

Figure 3-15 ECDU (type B) rear panel

MAIN: TMA power feeding selection knob of main receiving channel
DIVERSITY: TMA power feeding selection knob of diversity receiving channel
FUSE: fuse (2A)
Two knobs shown in
supply.

Table 3-12 Mapping between the knob setting and current strength of the TMA (type B)

Setting
0
1
2
3
ECDU (Type C)
Figure 3-16
Issue 01 (2006-11-18)
MAIN
1 2
0
3
3
0
2
1
FUSE
DIVERSITY
1 2
0
3
3
0
2
1
The specification of the fuse on the ECDU (Type B) rear panel is 1.5 A.
Figure 3-15
Table 3-12 shows the mapping between the knob setting and the TMA current.
MAIN
OFF
100
107
205
Huawei recommends that MAIN and DIVERSITY be set to 100 mA and 200 mA respectively.
shows the ECDU (type C) rear panel.
Huawei Technologies Proprietary
1 2
0
3
3
0
2
1
are used to control the current strength of the TMA power
DIVERSITY
OFF
65
100
205
3 Board
Unit
-
mA
mA
mA
3-21