SIGNAL LEVEL ADJUSTER WITH INCREMENTAL GAIN ADJUSTMENTS, FOR RF COMMUNICATION EQUIPMENT.

摘要

A signal level adjusting device (AD), for RF communication equipment arranged to received primary RF signals, comprises i) a tuner (TU) comprising a gain control means (SI,R), arranged to define a first or second digital command signal respectively each time it receives a first or second digital control signal respectively, and a gain adjusting means (VGA) arranged to decrease or increase respectively its gain by a fixed value when the command signal defined by the gain control means (SI,R) is a first or second command signal respectively, in order to adjust the level of the received primary RF signals, and ii) a demodulator (DEM) comprising a level control means (LCM1) arranged to generate a first or second digital control signal respectively each time it detects an increase or decrease respectively of the level of secondary signals representative of the adjusted signals output by the tuner (TU).