5 Functional Description
ID No: 161692
PRELIMINARY
Page 77
The DL duplexer has multiple outputs, including the primary and extension path, plus
forward and reverse probes used for auto setup, VSWR, and RSSI functions.
figure 5-7 Duplexer, DL IN
The UL IN duplexer of the Node C is equipped with a diversity filter. The duplexer is
used for the primary uplink path and is shared with the downlink output.
figure 5-8 Duplexer, UL IN, with integrated diversity filter
The diversity filter is equipped to provide increased uplink signals in a multipath
environment. The two paths are combined inside the DCM maintaining a time delay
between both paths. According to measurements signal strength gain is about 3-5 dB
for diversity reception.
LNA
LNA
