User's Manual

Digital Repeater User Manual
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Modules in the system diagram:
 Combiner：The main purpose of combiner is to combine two system to share the same antennas.
 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.
 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.
 FPGA:
Field－Programmable Gate Array
, FPGA module is to process the digital signal transferred
from analog signal and filter the signal out of selective band.
 PA: The power amplifier sub system helps the repeater to reach its targeted output power, linearity
of which decides the linearity of the repeater.
 Power supply is to supply power electricity to all repeaters’ modules.