–
Encapsulate data
l
The downlink TX channel has the following functions:
–
Decapsulates the clock signals, control signals and data signals from the BBU and sends
them to associated units
–
Shapes and filters downlink signals
–
Performs digital-to-analog conversion and IF output of IQ analog signals
–
Performs orthogonal up-conversion of IF signals to the TX band
The power amplifier amplifies the low-power RF signals from the signal processing unit.
The duplexer has the following functions:
l
Multiplexes the RX signals and TX signals
l
Combines the RX signals and TX signals so that they share the same antenna channel
l
Filters the RX/TX signals
LEDs
describes the LEDs on the panel of the MRFU.
Table 4-52
LEDs on the panel of the MRFU
Label
Color
Status
Description
RUN
Green
On
The power input is normal, and the
module is faulty.
Off
There is no power input, or the module
is faulty.
On for 1s and off for 1s The module runs properly.
On for 0.125s and off
for 0.125s
The module is loading software or is
not started.
ALM
Red
On
An alarm is generated, and the module
needs to be replaced.
Blinking (on for 1s and
off for 1s)
An alarm is generated. The alarm may
be caused due to faults in the related
boards or ports. Therefore, whether the
module needs to be replaced cannot be
determined.
Off
No alarm is generated.
ACT
Green
On
The module works properly (TX
channel enabled).
On for 1s and off for 1s The module is running (TX channel
disabled).
VSWR
Red
On (red)
A VSWR-related alarm is generated at
the ANT_TX/RXA port.
BTS3900
Hardware Description
4 BTS3900 Components
Issue 04 (2011-02-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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