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Indhold Side
1. Radiostyring – den moderne form for tidsmåling 187
1.1 Tidssignal sendere 188
2. Energiforsyning 190
3. Automatisk tidssynkronisering 191
4. Funktioner 192
4.1 Grundmodus 194
4.2 Yderligere funktioner 194
5. Funktionsbeskrivelse og betjening 195
5.1 Kronograf stop-funktion med splittid 195
5.2 Alarm 197
5.3 Time-nedtælling 198
5.4 Klokkeslæt nr. 2 200
5.5 Sendervisning 202
5.6 Manuel synkronisering (senderopkald) 203
5.7 Tidszonejustering 204
5.8 Indstilling af sprog (ugedage) 206
6. Genstart / opstart 207
6.1 Manuel indstilling 208
7. Generelle oplysninger 209
8. Tekniske specifikationer 211
1. Radiostyring – den moderne form for tidsmåling
5.000 år er gået siden tidsmålingens barndom med solure. Senere kom van-
dure, de mekaniske ure i det 13. århundrede og kvartsuret og nu det radiosty-
rede ur.
Et ur, der, hvis modtageforholdene er gode, altid går rigtigt og aldrig skal stil-
les. Junghans radiostyrede ure går yderst præcist, da det synkroniseres med
verdens mest nøjagtige ur via radiosignaler.
I Europa er dette det cæsiumbaserede atomur hos Physikalisch-Technischen
Bundesanstalt i Braunschweig (PTB).
For Nordamerika er det det cæsiumbaserede atomur hos U.S. Department of
Commerce, National Institute of Standards and Technology (NIST) i Boulder,
Colorado.
I Japan er det det cæsiumbaserede atomur hos Commercial Research
Laboratory (CRL) ved ministeriet for post og telekommunikation.
Disse ure går så præcise, at de først om 1 million år vil have en forventet afvi-
gelse på 1 sekund.
79


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