TFA Dostmann 30.3030.IT Livret D'instructions page 30

4. In order to ensure sufficient 868 MHz transmission however, this should under
good conditions be a distance no more than 100 meters between the final
position of the Temperature station and the transmitter (see notes on
"Mounting" and "868 MHz Reception").
5. Once the remote temperature has been received and displayed on the
temperature station, the DCF time (radio controlled time) code reception is
automatically started. This takes typically between 3-5 minutes in good
conditions. If after 10 minutes, the DCF time has not been received, press the
SET key to manually enter a time initially.
Note:
In the event of changing batteries of the units, ensure the batteries do not spring free
from the contacts. Always wait at least 1 minute after removing the batteries before
reinserting, otherwise start up and transmission problems may occur.
DCF-77 RADIO CONTROLLED TIME
The time base for the radio-controlled time is a Cesium Atomic Clock operated by
the Physikalisch Technische Bundesanstalt Braunschweig which 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. Your radio-controlled
temperature station receives this signal and converts it to show the precise time in
summer or wintertime. The quality of the reception depends greatly on the
geographic location. In normal cases, there should be no reception problems within
a 1500km radius of Frankfurt.
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
29