Duplexer Unit (Cdu, Dfu, Ddu) - Huawei Airbridge cBTS3612 Maintenance Manual

On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station
thus, can be handled flexibly), we should also pay attention to the
following:
The influence on the service
I.
Replacing a RLDU may affect the services transmitted through it.
Remember to switch off the RLDU from the BTS switch box before
replacing it.
Handling relevant cables
II.
Before replacing the RLDU, disconnect the power cables and
data cables on the panel. Connect them back properly after the
RLDU is installed
Installing RLDU
III.
When installing the RLDU, make sure its panel is in a seamless
contact with the front edge of the subrack and then tighten the
screws, or the RF transmission may not be able to meet the index.
Setting the switches
IV.
After installing the new RLDU, the S/W switch setting should be
the same as that of the replaced unit.

4.2.12 Duplexer Unit (CDU, DFU, DDU)

cBTS3612 supports 3 types of duplexers Unit, including
CDU,DFU, DDU. Their replacement procedures are quite similar.
For example, the replacement procedures of CDU will be
introduced.
4-16
Chapter 4 Component
Replacement