2322
Radio-controlled alarm clock
• Press and hold the – button for three seconds.
• The DCF symbol will be flashing.
• To end the reception, press and hold the – button for three seconds again. The
DCF symbol disappears.
• There are three different reception symbols:
flashes - reception is active
stays - reception is good
no symbol - reception is deactivated/turned off
• If the clock cannot detect the DCF-signal (for example due to disturbances,
transmitting distance, etc.), the time can be set manually. The clock will then
work as a normal quartz clock. (see: Manual settings).
Radio-controlled time reception
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 approximately 1,500 km. Changeover from summer time or
winter time is automatic. In Daylight Saving Time is shown on the LCD. The
quality of the reception depends mainly on the geographic location. Normally
there should be no reception problems within a 1,500 km radius around Frankfurt.
Radio-controlled alarm clock
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 naturally weakened. In extreme cases, please place the unit close to a win-
dow to improve the reception.
• During nighttime, the atmospheric interference is usually less severe and
reception is possible in most cases. A single daily reception is adequate to
keep the accuracy deviation under 1 second.
7. Operation
• Press and hold – or + button in the setting mode for fast running.
• The instrument will automatically quit the setting mode if no button is pressed
within 15 seconds.
• If the button tone is enabled, each button operation is acknowledged with a
beep.
7.1 Manual settings
• Press and hold SET button at the back in normal mode for three seconds.
• dcF appears on the display and ON (default) will be flashing. If the DCF recep-
tion is activated and after successful reception of the DCF signal no manual
adjustment is necessary.
• Press the – or + button if you want to deactivate the DCF reception (OFF).
• Confirm the setting with the SET button.
TFA_No. 60.2539_Anleitung_06_24 12.06.2024 9:11 Uhr Seite 12
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