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Der Zeitzeichen-Sender DCF77 strahlt auf sei-
ner Langwellenfrequenz von 77,5 kHz die
genaue und offizielle Uhrzeit der Bundes-
republik Deutschland aus.
Der Sender steht in Mainflingen bei Frankfurt
am Main und versorgt mit seiner Reichweite von
bis zu 2000 km die meisten funkgesteuerten
Uhren West-Europas mit den erforderlichen
Funksignalen.
Die tatsächliche Reichweite schwankt und ist
u. a. auch abhängig von der Tages- sowie der
Jahreszeit. So ist es durch Überreichweiten z.B.
vorgekommen, dass sich Funk-Uhren in Nord-
amerika auf den Sender DCF77 eingestellt
haben. In ungünstigen Fällen kann die Reich-
weite aber auch unterhalb von 2000 km liegen.
So funktioniert die Funkübertragung
Mit freundlicher Genehmigung durch die
Physikalisch-Technische Bundesanstalt
E43378_Funkwecker.book Seite 9 Mittwoch, 15. Dezember 2010 3:44 15
9


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