External Interfaces - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station
RLDU1
Figure 3-4 Functional structure of BTRB
I. BTRM 2mm connector
Each set of 2mm connectors includes one 5%22pin A-connector and three 3-socket-
C4-connectors.
A-connector transfers RLDU alarm signals from DB9 connector and RS485 interface
message from BHPA 24W7 combination DB-connector.
C4-connector transfers the main/diversity input/output RF signal of BTRM and +24V
DC power signal needed by BTRM.
II. BHPA 24W7 D-type combination blind mate connector
Each 24W7 D-type combination blind mate connector includes two coaxial contacts
(transferring BHPA input/output RF signals), two high-current power contacts
(transferring +24V power supply and PGND signals), one set of RS485 signal contacts
and a group of contacts for temperature sensor signals.
III. DB9 connector
There are two angled DB9 connectors on BTRB for two RLDUs alarm signals
transferred to BTRM.
IV. Temperature sensor
There are three temperature sensors for the three BHPA slots, used for sensing the air
temperature at each BHPA air outlet. They will convert the information into current and
send to BFMM on BHPA for processing. In this way, fan speed can be controlled on a
real-time basis.

3.4.3 External Interfaces

See the introduction to connectors in Section 3.4.2.
RS485
Functional
group 0
RS485
Temperature
Sensor
Chapter 3 Radio Frequency Subsystem
Functional Functional
group 1 group 2
RS485
Temperature
Sensor
3-9
System Principle
RS485
RLDU0
Temperature
Sensor