Huawei Airbridge cBTS3612 Installation Manual page 88

Installation Manual
Airbridge cBTS3612 CDMA Base Station
and so on, then push them in gently along the corresponding guide rails until
explicit resistance can be felt.
2) Fasten all screws into position on the panel one by one with a screwdriver to
ensure that it is seamless between module panel and the cabinet subrack.
Caution:
1) The transmitting and receiving indexes of the BTS will probably descend if the BTRM, CDU, DFU,
DDU, RLDU and other RF modules are not inserted correctly and the screws are not fastened.
Meanwhile, the CDU frequency is fixed and not adjustable. Its corresponding upper subrack probably
has higher carrier frequency, while the lower subrack has relatively lower carrier frequency. Decide the
slot position of the specified carrier frequency module according to the actual frequency in pratical
configuration, otherwise, it will result in such faults as low transmitting power of the BTS.
2) When DFU and DDU are used, they have no special requirement on frequencies, and are
configured from bottom up in the subracks.
Installation processes of fan box, BTRM module, BHPA module, and BTRM fan
module are shown in Figure 4-1. And the installation processes of other modules are
similar.
4 Installation of Cabinet Modules and Parts
4-2
Hardware Installation