Synchronising unit for timer designed as radio clock with time indication - converts received radio signal to digital evaluative pulses and time pulses for evaluation circuit converting to time telegram

摘要

The compressed time telegram (16) is led across an interface (10) to the time clock or time switch. The evaluation unit (4) has coding units (5, 8) assigned to it. The transmission of the compressed time telegram (16) is carried out by means of a two or three wire interface. The transmission of the compressed time telegram follows by modulation and demodulation via the mains or radio. ADVANTAGE - Radio signals received for setting are not led continuously over mains to time clock. This short time use nevertheless gives high protection against interference.