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Contents Page
1. Radio technology 31
2. Automatic time synchronisation 34
3. Functions 37
3.1 Time display 38
3.2 Date display 38
4. Reception indicator 39
5. Manual time synchronisation (transmitter calls) 39
5.1 Automatic transmitter search 41
6. Settings 43
6.1 Setting the time zone 43
6.2 Setting the language 43
6.3 12/24-hour display 44
6.4 Contrast setting 44
7. Re-starting after changing battery 45
7.1 Manual start 46
8. Illumination 48
9. Ready for use 49
10. General information 50
11. Technical information 50
12. Impermeability 51
1. Radio technology
The most up-to-date way to keep time.
5,000 years have passed since timekeeping began with sundials. In the
interim there have been water clocks, the mechanical clocks of the
13th century and quartz watches. Now we have the Junghans radio-
controlled watch. This is a watch that, with good reception, will never
go wrong and never need setting. The Junghans radio-controlled watch
is absolutely precise, as it is linked via radio technology to the timing
control of the most accurate clock in the world, For Europe this is the
Caesium Time Base at the Physikalisch-Technischen Bundesanstalt in
Braunschweig (Germany’s Institute of Natural and Engineering
Sciences). For Japan the Caesium Time Base of the National Institute for
Information and Communications Technology (NICT), a public admini-
stration authority organisation. For North America it is the U.S.
Commerce Department’s Caesium Time Base at the National Institute
of Standards and Technology (NIST) in Boulder, Colorado. These clocks
are so accurate that they are expected to deviate by no more than
1 second in a million years.
