Dotsmann DCF-77 Manuel d'instruction - Page 6

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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 1500km radius of Frankfurt.
Once the outdoor temperature is displayed on the Weather 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.
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.
•
During nighttime, the atmospheric disturbances are usually less severe and
reception is possible in most cases. A single daily reception is adequate to
keep the accuracy deviation below 1 second.

MANUAL SETTINGS

The following manual settings can be changed when pressing the SET key for:
•

LCD contrast setting

•
Time zone setting
•
Time reception ON/OFF setting
•
12/24-Hour setting
•
Manual time setting
•
Calendar setting
•
Snooze setting
•
°C/°F setting
•
Weather forecasting icon sensitivity setting
LCD CONTRAST SETTING
The LCD contrast can be set to 8 different levels to suit the users needs (default
LCD contrast setting is LCD 5). To set the desired contrast level:
1.
Press the IN key to select the level of contrast desired.
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LCD (flashing)