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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. Such a clock may be synchronized to the time ...
WWVB is a time signal radio station near Fort Collins, Colorado and is operated by the National Institute of Standards and Technology (NIST). [1] Most radio-controlled clocks in North America [2] use WWVB's transmissions to set the correct time. The normally 70 kW ERP signal transmitted from WWVB uses a 60 kHz carrier wave derived from a set of ...
Radio-controlled clock: NIST list of receivers; AC-100-WWVB Time Receiver; AC-500-MSF Time Receiver; ClockWatch Radio Sync; F6CTE's CLOCK; WWV: 2.5, 5, 10, 15, and 20 MHz AM Voice with modified IRIG-Hformat time code on 100 Hz sub-carrier (CCIR code) HF radio and antenna (plus software if automatic updating of computer time is desired)
A Casio Wave Ceptor WV-200DE watch. The Multi-Band 5 indicates that it can receive time calibration signals from five radio towers in the world. The Wave Ceptor series (stylized as WAVE CEPTOR or WaveCeptor) is a line of radio-controlled watches by Casio. Wave Ceptor watches synchronise with radio time signals broadcast by various government ...
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, because the radio signals they receive originate from atomic clocks. Normal low-cost consumer-grade receivers that rely on the amplitude-modulated time signals ...
A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day . Church bells or voices announcing hours of prayer gave way to automatically operated chimes on public clocks; however, audible signals (even signal guns) have limited range. Busy sea ports used a visual signal, the dropping ...
Digital clock. Basic digital alarm clock without a radio. The mark in the top-left of the display indicates that the time is 4:00pm (16:00), not 4:00am. A digital clock displays the time digitally (i.e. in numerals or other symbols), as opposed to an analogue clock . Digital clocks are often associated with electronic drives, but the "digital ...
Fully automatic timing did not become mandatory for world records until 1 January 1977. History. The first known time with an auto timing device in the Olympic Games was in the steeplechase in 1928, won by Toivo Loukola in 9:21.60 (9:21 4/5 official hand time). The device used was the Löbner camera-timer.