NIST updates guide to radio-controlled clocks
The updated guide includes revised rules for Daylight Saving Time and corrections to time zone tables.
-- Test & Measurement World, 9/24/2009 12:06:03 PM
NIST (National Institute of Standards and Technology) has updated its guide to radio-controlled clocks, which the organization says is among its most-requested publications, as it is downloaded about 100,000 times each year from the NIST site. In the US, the signals received by radio-controlled clocks originate from NIST radio station WWVB, located near Fort Collins, CO.
The guide, "WWVB Radio Controlled Clocks: Recommended Practices for Manufacturers and Consumers (2009 Edition)," is intended to help manufacturers develop reliable radio-controlled clocks and to help consumers learn how products work and troubleshoot reception problems. The updated version contains revised rules for Daylight Saving Time, corrections in time zone tables, and several new recommendations for manufacturers.
The guide also lists the latest WWVB specifications, several of which have been changed to make radio-controlled clocks work better; for example, the station's broadcast power has been boosted.
tf.nist.gov/general/pdf/2422.pdf
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