User's Manual

Digital Repeater User Manual
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 High-integration (One board to contain low-noise amplifier, frequency selection module, power
amplifier module)
 Manual gain control provides a variety of applications
 Support multi-system, multi-band, band selectable and adjustable
4.2 Appearance of DIGITAL repeaters
Figure 1 the front view (colors may differ from real products).
5 Block diagram and work principle
Digital repeater is basically a bi-directional amplifier, the downlink signals are received by the repeater from
BTS by the donor antenna, filtered by its internal duplexers and FPGA module, amplified by low noise amplifier
(LNA) and downlink PA unit, and then sent via the server antenna to the coverage area. The bandwidth is
operators’ working frequency only.
The uplink signal of mobile terminal from the coverage area is input via the server antenna, then filtered by
duplexers and FPGA module, amplified by the uplink low noise amplifier (LNA) and the uplink PA unit and finally
sent via the donor antenna to the BTS.