in the commandosignaalgenerator voor een automatische kanaalselectieinrichting zich ten opzichte van zendstations verplaatsende ontvanger.

摘要

This device which can be used in a phase or frequency modulation receiver, is connected to the output of the frequency discriminator of the receiver and comprises means for forming a logic signal which indicates the presence or absence of noise, a gate which transmits the clock pulses when a logic signal indicates the presence of noise, means for counting the transmitted clock pulses and for supplying a command signal for controlling a channel selection device, either which during a sequence of n time intervals tau a number of pulses counted during each time interval tau attains a first threshold, or when the number of pulses counted during a time interval tau attains a second threshold which is higher than the first threshold.