Bbfl - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station
This module isolates and drives the interface with the BHPA.
Temperature information collection module
This module collects the temperature information of the BHPA module in real time,
which is implemented by the MCU in query mode.
Panel indicator driving and alarm signal isolation module
This module is used to drive the panel indicator and isolate fan alarm signals.
Communication module
The communication module performs serial communication with the BTRM module.
Power supply module
The input power of the BFMM is +24V, and power consumption is 3.5W (excluding
power for the fans).
III. External interfaces
BHPA interface
Interface with the BHPA module, used for the BHPA alarm monitoring.
Serial communication interface
Interface used to report the alarm of the fans and the BHPA module.
Interface with the fan cover
Including fan alarm signal, panel indicator, and fan power interface.
IV. Indices
Module dimensions: 200.0mm%55.0mm (Length%Width).

3.9.2 BBFL

I. Overview
The BTS BTRM FAN Lamp Module (BBFL) has three RUN indicators to indicate the
running status of the BTRM module, fans and the BHPA module. The board is
connected with the BBFM via the fan cover interface. It is an auxiliary board.
II. Structure and principle
The structure of the BBFL is shown in Figure 3-11.
Chapter 3 Radio Frequency Subsystem
3-20
System Principle