The transmitter is located in Mainflingen near Frankfurt am Main
and, with its range of up to 2000 km, supplies the majority of
radio-controlled clocks in western Europe with the necessary
radio signals.
As soon as the radio-controlled alarm clock is supplied with
power, it switches to reception and searches for the signal from
the transmitter DCF77. If the time signal is received in sufficient
strength, the display shows the date and time.
The radio-controlled alarm clock switches on several times a
day and synchronises the time with the radio signal from the
transmitter DCF77. In the event the signal is not received, e.g.
during a strong storm, the device continues to run precisely and
then switches to receiving mode again at the next scheduled
time.
Alarm
You can set two different alarm times with the alarm clock, for
example, one for the week and one for the weekend. Both alarm
functions are set and operated in the same way.
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DCF Radio-controlled alarm clock CK 1700