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2. Radio clock - Wikipedia

   en.wikipedia.org/wiki/Radio_clock

   Radio clock. 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.

3. Casio Wave Ceptor - Wikipedia

   en.wikipedia.org/wiki/Casio_Wave_Ceptor

   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 time services around the world. These signals transmit the time measured by atomic clocks accurate to one second in millions of years.

4. WWVB - Wikipedia

   en.wikipedia.org/wiki/WWVB

   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 normal signal transmitted from WWVB is 70 kW ERP and uses a 60 kHz carrier wave yielding a ...

5. DCF77 - Wikipedia

   en.wikipedia.org/wiki/DCF77

   Official range. 2,000 km (1,243 mi) Website. DCF 77. Low cost DCF77 receiver. DCF77 is a German longwave time signal and standard- frequency radio station. It started service as a standard-frequency station on 1 January 1959. In June 1973 date and time information was added.

6. WWV (radio station) - Wikipedia

   en.wikipedia.org/wiki/WWV_(radio_station)

   WWV is a shortwave ("high frequency" or HF) radio station, located near Fort Collins, Colorado. It has broadcast a continuous time signal since 1945, and implements United States government frequency standards, with transmitters operating on 2.5, 5, 10, 15, and 20 MHz. [1] WWV is operated by the U.S. National Institute of Standards and ...

7. Electric clock - Wikipedia

   en.wikipedia.org/wiki/Electric_clock

   An electric clock is a clock that is powered by electricity, as opposed to a mechanical clock which is powered by a hanging weight or a mainspring. The term is often applied to the electrically powered mechanical clocks that were used before quartz clocks were introduced in the 1980s. The first experimental electric clocks were constructed ...

8. Radio controlled clock - Wikipedia

   en.wikipedia.org/?title=Radio_controlled_clock&...

   Language links are at the top of the page across from the title.

9. Time signal - Wikipedia

   en.wikipedia.org/wiki/Time_signal

   These automatic signal clocks were synchronizedby telegraphyin 1905 before the widespread use of radio. A time signalis a visible, audible, mechanical, or electronic signalused as a reference to determine the time of day. Church bellsor voices announcing hours of prayergave way to automatically operated chimeson public clocks; however, audible ...