User's Manual

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5. Block diagram and work principle
F10F-CP is basically a bi-directional booster , the downlink signals are received by the repeater from BTS by the
donor antenna, filtered by its combiner, internal duplexers and FC unit, amplified by low noise amplifier (LNA) and
downlink PA unit, and then sent via the server antenna to the coverage area. The bandwidth is wide band frequency.
The uplink signal of mobile terminal from the coverage area is input via the server antenna, then filtered by
combiner, duplexers and FC unit, amplified by the uplink low noise amplifier (LNA) and the uplink PA unit and finally
sent via the donor antenna to the BTS.
Modules in the system diagram:
z Combiner
：The main purpose of combiner is to combine two systems to share the same antennas.
z Duplexer: The main purpose of duplexer is to combine downlink and uplink to share the same antennas, the
duplexer is composted of one pair of band pass filter that can not only reject the spurious interference, but
also increase the isolation of Uplink and Downlink.
z LNA: LNA is the first active sub system of the repeater, of which low noise and high linearity is requested
under strong input signals. LNA is the major sub system that determines the noise figure of the repeater
system.
z RF SAW: Filter out useless frequency and amplifier the useful frequency.
z PA: The power amplifier sub system helps the repeater to reach its targeted output power, linearity of which
decides the linearity of the repeater.
z Power supply is to supply power electricity to all repeaters’ modules.