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Über das Zeitsignal
Allgemein
Die in der Wetterstation integrierte Funkuhr erhält ihre Funksignale vom Zeitzeichen-
sender DCF77. Dieser strahlt auf seiner Langwellenfrequenz von 77,5 kHz die genaue
und offizielle Uhrzeit der Bundesrepublik Deutschland aus.
Der Sender steht in Mainflingen bei Frankfurt am Main und versorgt mit seiner Reich-
weite von bis zu 2000 km die meisten funkgesteuerten Uhren West-Europas mit den
erforderlichen Funksignalen.
Sobald die Basisstation von den Batterien mit Strom versorgt wird, schaltet sie auf
Empfang und sucht das Signal vom Sender DCF77. Wurde das Zeitsignal über die im
Funkwecker eingebaute Ferrit-Stabantenne in ausreichender Stärke empfangen, wer-
den im Display Datum und Uhrzeit angezeigt.
Die Basisstation schaltet sich mehrmals täglich ein und synchronisiert die Uhrzeit mit
dem Funksignal vom Sender DCF77. Im Falle eines Nicht-Empfangs, z. B. bei starken
Gewittern, läuft das Gerät präzise weiter und schaltet dann zur nächsten vorgesehe-
nen Zeit wieder automatisch auf Empfang.
E47166_Nord Funkwetterstation.book Seite 23 Donnerstag, 19. Juni 2014 2:34 14
23


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