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Contents Page
1. Radio-controlled technology – state-of -the-art time measurement 41
1.1 Usable time signal transmitters 42
2. Automatic time synchronisation 44
3. Functions 45
3.1 Base mode 46
3.2 Additional functions 47
4. Description of functions and their operating 49
4.1 Display date / seconds 49
4.1.1 Setting time zone 1st time 49
4.2 Date / calendar week 50
4.2.1 Language selection (day of the week display) 51
4.3 2nd time 52
4.4 Reception indicator 53
4.4.1 Manual synchronisation (transmitter call) 54
4.4.2 RC on/off 55
4.4.3 Adjusting the contrast of digital display 57
4.5 Chrono with LAP and SPLIT function 58
4.6 10 hour countdown timer 60
4.7 Alarm 62
5. Restart / starting up procedure 64
5.1 Manual start 65
5
.1.1 Manual setting of time
65
5
.1.2 Manual setting of date
67
6. Readiness for use 68
7. General information 69
8. Technical information 71
1. Radio-controlled technology – state-of -the-art time measurementz
5,000 years have passed since timekeeping began, first with sun dials,
followed by water clocks, the mechanical clocks of the 13th century, quartz
watches and now culminating in radio-controlled watches.
With good reception the watch never goes wrong or needs to be set. The
Junghans radio-controlled watch is absolutely precise, as it is linked by radio
frequency to the time control system of the most accurate clocks in the
world.
For Europe this is the Caesium Time Base at the Physikalisch-Technische
Bundesanstalt in Braunschweig (PTB, National Metrology Institute).
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.
For Japan it is the National Institute of Information and Communications
Technology (NICT) at the Ministry of Internal Affairs and Communications in
To k yo.
All these clocks are so accurate, that they are expected to deviate by no more
than 1 second in a million years.
