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A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.
A radio clock is a clock that automatically synchronizes itself by means of radio time signals received by a radio receiver. Some manufacturers may label radio clocks as atomic clocks, [ 151 ] because the radio signals they receive originate from atomic clocks.
Consumer grade radio clock movement with the DCF77 receiver (right) in the clock. The small ferrite loopstick antenna used in this alarm clock can be seen at the left. Due to the propagation process, phase and/or frequency shifts observed in received signals the practical obtainable accuracy is lower than originally realized with the atomic ...
They also developed the world's first radio-controlled atomic alarm clock with an analogue alarm setting. In 1996, a new radio-controlled movement was developed: the smallest dual-motor, radio-controlled movement with the fastest setting system. This movement corrects to the right time within five minutes. [8]
The basic idea was to use a radio program to wake up users more pleasantly, as many people found the loud mechanical alarm made by traditional alarm clocks disturbing. The use of direct-read digital display as opposed to a traditional clock dial gave the design a modernistic feel, which was much appreciated in so-called Atomic Age .
18 cesium atomic clocks and 4 hydrogen maser clocks Cs, H National Institute of Information and Communications Technology; Koganei, ...