2524
Radio-controlled alarm clock
• The device will alert you with a beep and all segments will be dis-
played for a short moment.
• The display shows the current temperature and humidity.
• The clock will now scan the DCF frequency signal and the DCF sym-
bol will be flashing on the display. When the time code is successful-
ly received after 3-7 minutes, the radio-controlled time, the date and
the DCF symbol will be shown steadily on the display.
• The DCF reception always takes place daily at 1:00 o'clock in the
morning. If the reception fails, it will repeat again 5 times every hour.
• You can also start the initialisation manually.
• Press and hold the WAVE button for 3 seconds.
• To end the DCF reception attempt, press the WAVE button again.
• There are three different reception states:
flashing – reception is active
solid – reception is very good
no DCF reception
• If the clock cannot detect the DCF-signal (e.g. due to interference,
transmitting distance, etc.), the time can be set manually. The
clock will then work as a normal quartz clock.
Radio-controlled alarm clock
Radio-controlled time reception
The time base for the radio-controlled time is a caesium atomic clock
operated by the Physikalisch Technische Bundesanstalt based in
Braunschweig (Brunswick), Germany. It has a time deviation of less
than one second in one million years. The time is coded and transmit-
ted from Mainflingen near Frankfurt via the frequency signal DCF-77
(77.5 kHz) and has a transmitting range of approximately 1,500 km.
Your radio clock receives the signal, converts it and always shows the
exact time. The adjustment to Daylight Saving Time (summer/winter
time) is automatic. In Daylight Saving Time DST is shown on the LCD.
The reception quality depends mainly on geographic location. Nor-
mally there should be no reception problems within a 1,500 km radius
around Frankfurt.
Therefore, please note the following steps:
• The recommended distance to any interfering sources like com-
puter screens or TV sets is at least 1.5 - 2 meters.
• Within concrete walls (reinforced with steel) such as basements,
the received signal is naturally weakened. In extreme cases, please
place the unit close to a window to improve reception.
TFA_No. 60.2547_Anleitung_11_19 14.11.2019 19:17 Uhr Seite 13
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