Abstract: 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).

Abstract: 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).

Abstract: To facilitate the adjustment of the S correction in apparatus comprising cathode-ray tubes (televisions, monitors), the process consists in displaying visual marks on the screen, at the location of the picture points which remain stationary as the amplitude of the S correction which is applied to the sawtooth current flowing through the deflection coils of the cathode-ray tube is varied.

Abstract: In a television receiver comprising a horizontal deflection circuit (2) associated with a flyback transformer (9), the horizontal deflection circuit comprises a switch (6) which is controlled by a control signal (Hdrive) generated by a deflection control circuit (1). The deflection control circuit generates a phase difference signal (Vcomp) which is a function of the phase difference of a horizontal synchronisation pulse and a flyback pulse and generates the control signal (Hdrive) as a continuous function of the phase difference signal (Vcomp). The deflection circuit is further arranged to generate at least one discrete phase jump of the control signal (Hdrive) when the phase difference signal (Vcomp) lies outside of a range of preset values (Vlow, Vhigh).