TFA 35.1115.IT Manual De Instrucciones página 26

2. Within 30 seconds, insert the batteries into weather station (see
"Install and replace batteries in the weather station"). Once the
batteries are in place, all segments of the LCD will light up briefly.
Then the time (as 0:00) and the weather icon will be displayed. If
these are not displayed after 60 seconds, remove the batteries and
wait for at least 30 seconds before reinserting them.
3. After inserting the batteries, the weather station will start receiving
data from the transmitter. The outdoor temperature and the signal
reception icon should then be displayed on the weather station. If
this does not happen after 3 minutes, the batteries will need to be
removed from both units and reset from step 1.
4. In order to ensure sufficient 868 MHz transmission, this should
under good conditions be a distance no more than 100 meters
between the final position of the weather station and the transmitter
(see notes on "Mounting" and "868 MHz Reception").
Once the remote temperature has been received and displayed on
5.
the weather station, the DCF time (radio controlled time) code
reception is automatically started. This takes typically between 3-5
minutes in good conditions.
DCF 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 weather 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 1,500
km radius of Frankfurt.
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