Clock Tells What
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Radio Control Clock
If you have a radio control clock (RCC), then you know without a doubt that your clock is giving the correct time. You know this because that clock is receiving a radio signal that tells the clock exactly what time it is. These kinds of clocks have been around awhile but only became reasonably priced and usable by the general public in the early 90's. While there are a lot of complicated details about how a radio controlled clock works, the basis of its functioning is actually fairly simple. You can find a lot of options for a new radio control clock at American Time & Signal, where they have many options available.
How a RCC Works
The National Institute of Standards and Technology, also known as NIST, hosts a radio station called WWVB. This radio station sends out a constant signal. This signal fluctuates regularly to signify each second, minute, hour, etc. The fluctuations are read by the radio receiver in a radio control clock and the time is displayed based on the time that is being transmitted to it from the radio station. The fluctuations in signal strength are a 'Morse code' of sorts that tells the RCC what time it is, or in the case of manual clocks, they tell the clock operator what time it is, but more about that below.
Types of RCC
You can have a radio control clock in nearly every form you can have a regular clock in. You can have a digital clock, wall clock, or even wrist watch. Most RCCs that are used these days are automatic, but there is still some older semi-automatic and manual clocks that are in existence, and sometimes even in use. Automatic radio control clocks receive the signals from the radio station and automatically adjust the time of the clock to read the exact time. With a semi-automatic RCC, you must set the time on the clock yourself first, and then the time is adjusted based on the radio station signal strength from that point forward. If you are lucky enough to still have a manual RCC that works, then you must listen to the WWVB radio station through a set of headphones, decode the sounds to figure out what the time is, and then change the time on the clock to read the correct time.
About the Author
Marcus Sam says that, "Wired clock systems, replacement clocks and repairs continue to be the core business, ATS expanded the product offering to include the SiteSync IQ Wireless Clock System which uses a time synchronization signal from GPS satellites, CDMA cell phone tower signals or an Ethernet connection."
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