TFA 60.2540 Bedienungsanleitung Seite 12

TFA_No. 60.2540_anl_01_18 06.01.2018
MELODY – Radio-controlled alarm clock with various alarm sounds
6.1 Radio-controlled time reception
• The clock will now scan the DCF frequency signal and the DCF symbol will be flashing on the display. When the time code
is successfully received after 3-8 minutes, the radio-controlled time, the date and the DCF symbol will be shown steadily
on the display.
• The DCF reception always takes place at 2:03 in the morning. If the reception is not successfully received, further
attempts will be taken at 3:03, 4:03 and 5:03 o'clock.
• You can also start the initialization manually.
• Press and hold the HOUR DAY/ button for three seconds.
• The clock will now scan the DCF frequency signal and the DCF symbol will be flashing.
• There are four different reception states:
Reception symbol (radio waves) are flashing - reception is active
Radio waves stop flashing - reception is successful
Radio waves disappear - set the clock manually, reception is still activated
No radio-controlled time symbol - set the clock manually, reception is deactivated
• By default, the DCF reception is activated and after successful reception of the DCF signal no manual adjustment is neces-
sary.
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MELODY – Radio-controlled alarm clock with various alarm sounds
• If the clock cannot detect the DCF-signal (e.g. due to interference, transmitting distance, etc.), the time can be set manually.
• The clock will then work as a normal quartz clock. (see: Manual settings).
Note: Radio-controlled time reception
The time base for the radio-controlled time is a caesium atomic clock operated by the Physikalisch Technische Bunde-
sanstalt based in Braunschweig (Brunswick), Germany. It has a time deviation of less than one second in one million years.
The time is coded and transmitted from Mainflingen near Frankfurt via the frequency signal DCF-77 (77.5 kHz) and has a
transmitting range of approximately 1,500 km. The adjustment to Daylight Saving Time (summer/winter time) is automatic.
In Daylight Saving Time DST is shown on the display. The reception quality depends mainly on geographic location. Normally
there should be no reception problems within a 1,500 km radius around Frankfurt.
Therefore, please note the following steps:
• The recommended distance to any interfering sources like computer screens or TV sets is at least 1.5 - 2 meters.
• Within concrete walls (reinforced with steel) such as basements, the received signal is naturally weakened. In extreme
cases, please place the unit close to a window to improve 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.
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