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Wwvb radio controlled clocks11/22/2023 ![]() However, the uncertainty of measurements made with these wavemeter instruments was never much better than 0.1 %. During the next decade, frequency measurement technology based on wavemeters continued to improve under Dellinger’s guidance, due to better mathematical derivations for inductance and capacitance and better measurements of capacitors and their materials. Dellinger obtained the frequency reference for his wavemeter calibrations from a simple calculation of the resonance of an inductance-capacitance (LC) circuit. In 1911, Dellinger calibrated a wavemeter sent to NBS by a wireless company, a task that he later called “the first radio job of the National Bureau of Standards”. Dellinger, who joined the Bureau in 1907 and remained there until 1948, was a pioneer in the standardization and measurement of radio frequency. As a result much of its early radio research was focused on developing measurement standards. NBS was, of course, a standards organization. Austin went on to publish nearly 70 papers about radio propagation at the Bureau before his death in 1932. ![]() NBS scientists began conducting radio experiments shortly after the agency was founded, making perhaps their first contribution to the radio science literature in 1905, when Louis Austin published a paper about electrolytic detectors. NBS was founded in March 1901, just nine months before Marconi transmitted the letter “S” across the Atlantic by wireless telegraphy. In some ways, the origins of the National Bureau of Standards (NBS), now known as the National Institute of Standards and Technology (NIST), coincide with the origins of radio. Early Radio Experiments and Frequency Measurements at NBS It then discusses recent advances that have made the station’s time signals easier to receive and more useful than ever before.Ģ. It goes on to describe the station’s resurgence after a significant power increase in the 1990s, when it became a time-of-day synchronization source for mass produced radio controlled clocks. ![]() It describes the station’s origins as a source of standard frequency, with only a small number of time users. This paper traces the history of WWVB, beginning with the earliest radio experiments conducted by NIST’s predecessor, the National Bureau of Standards (NBS). Based on technology that was already mature and well established when the station began broadcasting in 1963, WWVB later benefitted from the miniaturization of electronics and the advent of the microprocessor, which made low cost radio controlled clocks possible that would work indoors. government, WWVB has spanned and survived numerous technological eras. One of the best known and most widely used measurement services provided by the U. Thus, the year 2013 marked the station’s 50th anniversary, a half century of delivering frequency and time signals referenced to the national standard to the United States public. NIST radio station WWVB, which today serves as the synchronization source for tens of millions of radio controlled clocks, began operation from its present location near Fort Collins, Colorado at 0 hours, 0 minutes Universal Time on July 5, 1963.
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