2524
SIESTA – Radio-controlled alarm clock
• There are three different reception symbols:
flashing - reception is active
stays - reception is very good
no symbol - no reception/reception is shut down/set time manually
• If the clock can not 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 setting of the 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.
SIESTA – Radio-controlled alarm clock
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.
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.
TFA_No. 60.2532_anl_09_16 20.09.2016 09:54 Uhr Seite 13
