Chapter
10
Installation
of Internal Modules
10-5
accomplishes down conversion, signal amplification and bandpass filter on
reverse links.
MTRX800 is used in M800T/M802T micro-BTS/remote stations, whereas
M190T/M191T/M192T micro-BTS/remote stations adopt MTRX190.
3. MPA
MPA receives CDMA signals transmitted by MTRX and then amplifies the
power of the signals, which are finally emitted to a cell through the antenna after
being processed by a duplexer filter.
M800T micro-BTS/remote stations adopt MPA800; M802T micro-BTS/remote
stations adopt MPA802; M190T/M191T micro-BTS/remote stations adopt
MPA190T; M192T micro-BTS/remote stations adopt MPA192.
4. RFE
Receive Front Element (RFE) consists of MDUP (Duplex), MDIV (Diversity)
and MLNA.
On reverse links, the signals received by the antenna are filtered by the duplexer
filter and then amplified.
On forward links, the signals outputted by MPA are filtered by the duplexer
filter and then emitted to the cell through the antenna.
5. MPD
MPD directly converts the 120V AC power into the power with suitable voltage
and supply the power to all modules in a micro-BTS/remote station. Moreover,
it controls the heater in a micro-BTS/remote station to maintain the internal
environment stable. It also supports the monitoring of the power supply status.
6. Optical interface module
There are two kinds of optical interface modules used: OIM and RFM, which
are respectively installed in a micro-BTS and a remote station. They accomplish
the following functions:
1
)
Connecting BDS and RFS, providing channel for multiplexing and
demultiplexing forward/reverse data and signaling, and carrying out
optical-electrical conversion.
Содержание ZXCBTS M190T
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