Andrew Wireless Innovations Group MRB-LMR User Manual
2. System Description
MR Booster Manual (MN001808-1, 9/99)
Page 5
Figure 2-3. MR Booster functional block diagram
2.3
Theory of Operation
A block diagram of the basic high-power MR Booster system is shown in Figure 2-3.
In order to simplify the discussion, a repeater-booster installation is assumed as in
Figure 2-1.
In order to simplify the discussion, a repeater-booster installation is assumed as in
Figure 2-1.
2.3.1
Downlink path
Duplexed RF from the repeater’s coverage antenna port is connected to the
booster repeater port. The repeater duplexer then routes the downlink signal
frequencies to the PA combiner/splitter module.
booster repeater port. The repeater duplexer then routes the downlink signal
frequencies to the PA combiner/splitter module.
POWER
SUPPLY
A
POWER
SUPPLY
B
+12V
+26V-A
+26V-B
+12V
+12V
+26V-A
+26V-B
LOGIC
CONTROLLER
+12V
I
2
C
CONTROL I/O
Repeater or BTS
main port
Repeater or BTS
diversity port
+26V
MAIN LNA
DIVERSITY LNA
POWER AMPLIFIERS
RPTR
DUPLEXER
MOBILE
DUPLEXER
UL FILTER
PA
COMBINER/
SPLITTER
PA
COMBINER/
SPLITTER
Main coverage
antenna
Diversity coverage
antenna