Description

L3 UPC-70 Operations and Maintenance Manual dated May 1st 1993 covers the UPC-70 Uplink Power Control in detail.

An Uplink Power Control like the UPC-70 receives a DC voltage from an LNA subsystem, and based on the voltage fluctuation it sends control voltage to an attenuator subsystem to increase of decrease attenuation. Using this process the output of an amplifier can be automatically adjusted to compensate for rain or other variables.