Circuit arrangement for remote-controlled slave-clock lines

摘要

An interference filter tuned to possible interference frequencies is connected in parallel with the receivers to the input line provided for the remote control. The output of this interference filter is connected to inhibit inputs of the receiver so that, when interference frequencies occur, no reception of signals is possible. The outputs of the receivers are connected to muting devices which contain delay devices. Using these delay devices, the muting devices mutually release each other when a predetermined time has elapsed after the occurrence of a signal. During the occurrence of an interference, the slave-clock line continues to be controlled by an internal time pattern generated in the substation.