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Radio-controlled alarm clock
Note for radio-controlled time
The time base for the radio-controlled time is a caesium atomic clock operated by the Physikalisch Technische Bunde-
sanstalt Braunschweig. 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 frequency signal DCF-77 (77.5 kHz) and has a transmitting range of approximately
1,500 km. Your radio-controlled clock receives this signal and converts it to show the precise time. Changeover from sum-
mer 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 geographic location. Normally 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 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 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 deviation under 1 second.
Radio-controlled alarm clock
7. Operation
• Press and hold the HR or MIN button in the setting mode for fast running.
• The device will automatically quit the setting mode if no button is pressed for a long period of time.
7.1 Manual settings of the clock
• Slide the switch to TIME SET.
• The time will be flashing on the large display.
• Press the HR button to adjust the hours.
• With this setting, you also select, if the time will be displayed in the 12 or 24 hour system. First, the hours will appear in
24- hour system then the hours will appears in 12-hour system (PM appears from 12 to 24 o'clock on the display).
• Press the MIN button to adjust the minutes.
• Slide the switch to the position AL ON or AL OFF, to exit the setting mode.
• On the display appears the adjusted time.
• By a successful reception of the DCF signal, the manually set time will be overwritten.
7.2 Setting of the alarm time
• Slide the switch to the position AL SET.
TFA_No. 60.2532_anl_08_21 29.08.2021 9:48 Uhr Seite 13
