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When the time code is received, the DCF
tower becomes permanently lit and the
time will be displayed.
DCF 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
thermo-hygrometer 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 1,500
km radius of Frankfurt.
DCF reception is done twice daily at 02:00 and
03:00 am. If the reception is not successful at
03:00 am, then the next reception takes place
the next hour and so on until 06:00 am, or until
the reception is successful. If the reception is not
successful at 06:00 am, then the next attempt
will take place the next day at 02:00 am.
If the tower icon flashes, but does not set the
time or the DCF tower does not appear at all,
then please take note of the following: