The Sound of WWVB (60 khz)

If our ears, the 60 kHz signal from WWVB radio stations as a 1000-Hz tone was transmitted to hear, this is how it would sound like. This is a minute sample of the WWVB radio signal on Februrary 1, 2009, beginning at 0246 UTC recorded. Reception was held in New Jersey, about 1600 miles from WWVB's Fort Collins, Colorado transmitter with the help of a special receiver his own design. WWVB's 50 kilowatt radio signal covers the continental United States, and provides the current time, year, dayof the year, UT1 offset, leap year and leap second information with a data rate of one bit per second. It is commonly used in setting up radio-controlled "atomic" clocks, usually during the night hours, when the signal is strongest. The WWVB carrier drops 17 dB in amplitude at the beginning of each second. It rises again to full power a fraction of a second later, producing an amplitude shift keying signal. The number of milliseconds that it takes to rise to full power after the beginning of eachSeconds gives a binary '0 's (200 ms), '1' s (500 ms) and frame M'arker pulses (800 ms) to interpret that determine the beneficiaries of the current date and the time. For more information about WWVB is available at: tf.nist.gov



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