User's Manual

5
2.2 The composition and principle block diagram in the paper
2.2.1 The block diagram of
INDOOR OUTDOO
R
duplexer duplexer
UP_LNA UP_PA
filter
DW_PA DW_LNA
filter
duplexer duplexer
UP_LNA UP_PA
filter
DW_PA DW_LNA
filter
Combiner
u
1
x
2
x
1
f(x
1
...x
n
)
Combiner
u
1
x
2
x
1
f(x
1
...x
n
)
850M
1900M
The principle diagram amplifier
2.2.2 The principles outlined
Mainly by 850 M amplifier and 1900 M two amplifier moduleThe distribution of the method of frequency by
close to completeFirst downside (BTS) signals through the OUTDOOR antenna into the method of close
Close to 850 M and PCS1900M method of two signals to choose apartAnd then sent into the corresponding
amplifier module will ampli
Signals into the amplifier moduleFirst after duplex deviceDownlink signal to choose filterEnter LNA (low
noise amplifier) preliminary amplificationAnd then after surface acoustic filter filterEnter UP_PA (downside
power amplifier) to signal further amplificationAfter double work of choice is again after filteringEnter and
method, and then through the heavy start antenna launch out