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Contents Page
1. Radio technology 29
2. Environmentally friendly solar technology 32
3. Automatic time synchronisation 32
4. Functions 35
5. Selectable LC displays 37
6. Reception indicator 37
6.1 Manual time synchronisation (transmitter calls) 38
6.2 Setting the time zone 40
6.3 Quartz mode 40
7. Ready for use 42
8. Charge level indicator on watches using solar power 43
8.1 Restarting after a complete discharge of the power store 44
9. Charging times 45
10. General information 46
11. Technical information 46
12.
Impermeability
47
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-control-
led 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 con-
trol 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
administration 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.
