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What is MSF and DCF?

MSF is the radio signal which broadcasts the national time standard for the UK. The MSF service broadcast from Rugby is the principal means of disseminating the UK national standards of time and frequency which are maintained by the National Physical Laboratory. Transmission is 24 hours a day, and the carrier frequency is maintained at 60 kHz to within 2 parts in 10¹².

For more information about MSF go to http://www.npl.co.uk/time/msf.html

DCF77 is a long-wave radio transmitter at 77.5 kHz for precise time information. It is located near Frankfurt, Germany in Central Europe and available across most of Europe. It serves as exact time source for a lot of applications, starting from simple radio clocks and numerous public clocks up to demanding scientific experiments.  DCF time is 1 hour ahead of MSF time.

For more information about DCF go to http://www.electronic-engineering.ch/microchip/datasheets/dcf77/dcf77.html

Products with MSF or DCF clocks will automatically synchronise and set the clock time to the MSF or DCF transmitter time at initial power-up and continue to maintain the clock accuracy.  MSF and DCF clocks will automatically adjust for daylight saving times.

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