Figure 3-9 Cdu (Type D) Rear Panel; Table 3-8 Mapping Between The Switch Setting And The Current Strength Of The Tma (Type D) - Huawei BTS3 Series Hardware Description Manual

M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
CDU (type D)
Figure 3-9

Figure 3-9 CDU (type D) rear panel

TMA M: TMA power feeding switch of main receiving channel
TMA D: TMA power feeding switch of diversity receiving channel
FUSE: Fuse (2A)
Two 3-option switches shown in
TMA power supply.
Table 3-8

Table 3-8 Mapping between the switch setting and the current strength of the TMA (type D)

Setting
1
2
3
Issue 01 (2006-11-18)
Use only the settings described in
!
Huawei recommends that MAIN and DIVERSITY be set to 100 mA and 200 mA respectively.
!
shows the CDU (type D) rear panel.
TTA M TTA D TTA D
OFF OFF
OFF
TTA M TTA D TTA D
1 1
1
2 2
2
3 3 3
FUSE
FUSE
shows the mapping between the switch setting and the TMA current.
TMA M
100
107
205
Huawei Technologies Proprietary
Table 3-7.
Figure 3-9 are used to control the current strength of the
TMA D
65
100
205
3 Board
Unit
mA
mA
mA
3-13