–
Performs digital-to-analog conversion and IQ modulation
–
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
Enables RX signals and TX signals to share one antenna channel
l
Filters RX signals and TX signals
LEDs
describes the LEDs on the WRFU panel.
Table 4-50
LEDs on the MRFU panel
Label
Color
State
Description
RUN
Green
ON
The power input is normal, but 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 by the fault of the related
module or port. Therefore, whether the
module needs to be replaced cannot be
determined.
OFF
No alarm is generated.
ACT
Green
ON
The module works properly (the TX
channel is set to ON).
ON for 1s and OFF for
1s
The module is running (the TX
channel is set to OFF).
VSWR
Red
ON (red)
A VSWR-related alarm is generated at
the ANT_TX/RXA port.
Blinking (ON for 1s and
OFF for 1s)
A VSWR-related alarm is generated at
the ANT_RXB port.
Blinking (ON for
0.125s and OFF for
0.125s)
A VSWR-related alarm is generated at
the ANT_TX/RXA and ANT_RXB
ports.
BTS3900
Hardware Description
4 BTS3900 Components
Issue 04 (2011-02-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4-51