Abstract: A method for stabilizing the mean-frequency and modulation slope of a frequency controlled oscillator used for generating PSK signals is disclosed. A control signal representative of the phase deviation between the PKS signal and a reference signal representative of the base frequency of the carrier signal is generated. The control signal is directly utilized to stabilize the mean-frequency of the PSK signal generated by the frequency controlled oscillator. After the control signal is inverted as a function of a data signal whose information is to be carried by the PSK signal, it is utilized to stabilize the modulation slope of the PSK signal.

Abstract: Equalizing system arranged for pulse transmission, adaptive equalization being achieved without the use of an additional periodic adjusting pulse pattern. For this purpose in a control voltage generator the sub-bands and the associated additional sub-bands of an equalized pulse signal processed by the phase and amplitude control circuits are used after pulse regeneration directly as a local reference signal and an adjusting signal respectively. The sub-bands and additional sub-bands are applied to the cascade connection of a comparator and a mean-value device for generating the control voltage which controls the phase and amplitude control circuits in a feedback mode.