Huawei Airbridge BTS3612A-1900 Technical Manual page 7

Technical Manual
Airbridge BTS3612A CDMA Base Station
The baseband subrack is configured with various baseband processing boards, such
as BCIM, BCPM, BCKM and BRDM.
A main cabinet secondary power switch box is configured to the left of the subrack.
With the secondary power switch box, each board and module can be separately
powered by the PSU
Each pair of BTRM and BHPA boards share one power switch. The RLDU has its own
power switch.
Carrier subrack
There are two carrier subracks used to configure the carrier units, each of which is
composed of one BTRM and one BHPA. Each subrack can be configured with one
RLDU.
Duplexer subrack
The duplexer subrack is located between the upper and lower carrier subracks. It is
configured with duplexer units DFU or DDU as needed.
To the right of the subrack is a lightning protector connecting to the GPS/GLONASS
synchronization antenna.
Other devices
Between the baseband subrack and the upper carrier subrack are the fiber flange,
cabling trough, fan box and air inlet.
The cabling trough is used to route the satellite signal receiving cable and fibers
(connecting the BRDM and carrier modules). The extra fibers can be coiled on the fiber
flange.
The fan box, the air inlet and air outlet (on the top of the cabinet) form a ventilation path
to discharge the heat in the baseband subrack.
II. Auxiliary cabinet
The auxiliary cabinet is configured with the PSU
built-in transmission equipment.
Transmission equipment subrack
Standard space is reserved in this subrack to accommodate microwave, High-speed
Digital Subscriber Line (HDSL), or SDH transmission equipment so as to support
various networking modes.
Power supply subrack
The power supply subrack is configured with PSU
Monitoring Unit (PMU) can also be installed.
Battery subrack
. All the baseband processing boards share one power switch.
DC/DC
1-2
Chapter 1 Overall Structure
, PSU , storage batteries, and
AC/DC DC/DC
and PSU
DC/DC
System Principle
. A Power
AC/DC