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Radio-controlled alarm clock
• You can start the initialization manually.
• Press and hold the ▼/FUNK button for three seconds.
• The DCF reception symbol will be flashing. If the reception is not successful, the next
reception takes place automatically the next hour.
• Interrupt the reception by pressing the ▼/FUNK button again for three seconds. The
DCF symbol disappears.
• The DCF reception always takes place daily at 2:00 and 3:00 or at 4:00 and 5:00
o'clock in the morning. If the reception is not successfully received until 5:00 o'clock, the
next receive operation is again at 2:00 o'clock in the morning.
• There are three different reception symbols:
flashing – reception is active
stays – reception is very good
No symbol – no reception/reception is deactivated/
set time manually
• If the clock cannot detect the DCF-signal (for example due to disturbances, transmitting
distance, etc.), the time can be set manually. The DCF symbol disappears and the clock
will then work as a normal quartz clock. (see: Manual settings).
Radio-controlled alarm clock
3.1.1 Note for radio-controlled time DCF
The time base for the radio-controlled time is a caesium atomic clock operated by the
Physikalisch Technische Bundesanstalt Braunschweig. It 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 approxi-
mately 1,500 km.Your radio-controlled clock receives this signal and converts it to show the
precise time. Changeover from summer time or winter time is automatic. In Daylight Saving
Time DST is shown on the display. The quality of the reception depends mainly on the geo-
graphic location. Normally there should be no reception problems within a 1,500 km radius
around Frankfurt.
Please take note of the following:
• The recommended distance to any interfering sources like computer monitors or TV
sets is at least 1.5 - 2 meters.
• Inside ferro-concrete rooms (basements, superstructures), the received signal is natu-
rally weakened. In extreme cases, please place the unit close to a window to improve
the reception.
• During night-time, the atmospheric interference is usually less severe and reception is
possible in most cases. A single daily reception is adequate to keep the accuracy devia-
tion under 1 second.
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