User's Manual

Sprint User Manual
3G Indoor Repeater
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2.2.2 Downlink Path
Downlink and Uplink Gain Budgets have similar structure.
In case of Downlink Path, RF signal is received from Donor Antenna, and through FWD LNA
division, then the signal is transferred to IF division, where desirable Band is selected by Digital
Filter. Selected Band is transferred to RF division again, and through FWD PAM, after that the
signal is transmitted to User through Server Antenna.
Two attenuators use for ALC and NF compensation. ALC attenuation range is 20dB, and NF atte
nuation range is 10dB in Digital Step Attenuator.
<Pic.5> Downlink Block Diagram