Oregon Scientific 30.3016.54.IT Manuel D'utilisation page 51

Once the outdoor temperature is displayed on the temperature station, the DCF tower icon in
the clock display will start flashing in the upper left corner. This indicates that the clock has
detected that there is a radio signal present and is trying to receive it. When the time code is
received, the DCF tower becomes permanently lit and the time will be displayed.
DCF reception is done twice daily at 02:00 and 03:00 am. If the reception is not successful at
02:00 am, then the next reception takes place the next hour and so on until 06:00am, or until
the reception is successful. If the reception is not successful at 06:00 am, then the next attempt
will take place the next day at 02:00 am.
If the tower icon flashes, but does not set the time or the DCF tower does not appear at all, then
please take note of the following:

Recommended distance to any interfering sources like computer monitors or TV sets is a
minimum of 1.5 - 2 meters.

Within ferro-concrete rooms (basements, superstructures), the received signal is
naturally weakened. In extreme cases, please place the unit close to a window and/ or
point its front or back towards the Frankfurt transmitter.
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