Setting Rldu Switches - Huawei Airbridge cBTS3612 Installation Manual

Installation Manual
Airbridge cBTS3612 CDMA Base Station
Table 4-1 Description of BCIM DIP switches and jumpers
Serial number
S2~S9
J6
&
Note:
The settings of BCIM DIP switches and jumpers have been already prepared before delivery. Please
check it.

4.5 Setting RLDU Switches

The RLDU switches and indicators are shown in Figure 4-3.
(1) Tower-top Amplifier Switch (the BTS for 800MHz and 450MHz
bands does not have this switch)
Figure 4-3 RLDU Panel
Description for RLDU switches is shown in Table 4-2.
Functions
E1 interface matching
impedance (75Ù/120Ù),
balanced or unbalanced mode
(optional)
E1 interface matching
impedance (75Ù/120Ù) mode
for feedback. The program
initializes E1 driver chip
according to the status of this
jumper
4-5
4 Installation of Cabinet Modules and Parts
Operation
DIP switches No.1, 2, 3, 4 are all located at the "OFF"
position.120Ù twisted pair.
DIP switches No. 1, 2, 3, 4 are all located at the "ON"
position.75Ùcoaxial cable with its skin connected with
PGND
DIP switch No. 12 is on; No. 34 is located at "OFF"
position. 75Ù coaxial cable with its skin not connected
with PGND.
DIP switches No. 1, 2, 3, 4 are located at other position
except the above three positions. Undefined
Short-circuiting jumper 2, 3.120Ù configuration mode
Short-circuiting with others or none.75Ù configuration
mode
(2) S/W
Hardware Installation