* When the signal is successfully received by the temperature station, the outdoor
transmission icon will be switched on. (If not successful, the icon will not be shown on
LCD). The user can then easily see whether the last reception was successful (icon on) or
not (icon off). On the other hand, the short blinking of the icon shows that a reception is
currently taking place.
DCF-77 RADIO CONTROLLED TIME
The time base for the radio-controlled time is a Cesium Atomic Clock operated by the
Physikalisch Technische Bundesanstalt Braunschweig which has a time deviation of less
than one second in one million years. The time is coded and transmitted from Mainflingen
near Frankfurt via frequency signal DCF-77 (77.5 kHz) and has a transmitting range of
approximately 1,500 km. Your radio-controlled temperature station receives this signal
and converts it to show the precise time in summer or wintertime.
The quality of the reception depends greatly on the geographic location. In normal cases,
there should be no reception problems within a 1500km radius of Frankfurt.
The DCF tower icon in the clock display will start flashing in the upper left corner. This
indicates that the clock has detected that there is a radio signal present and is trying to
receive it. When the time code is received, the DCF tower becomes permanently lit and
the time will be displayed.
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