Conrad Electronic CPA601 Bedienungsanleitung Seite 45

After a valid signal was received, the DCF symbol is permanently visible and the time is
displayed.
If the blinking ends after a few minutes and the time is not displayed (DCF symbol only shows
" "), no DCF signal was detected.
Change the setup position of the radio projection clock and start a new reception attempt. To
do so, press the button "" for two seconds until the DCF symbol blinks. Now wait a few
minutes again as described above.

As an alternative, you can set the time/date manually or simply leave the
projection clock overnight so that it can carry out the daily DCF signal search.
A successful DCF reception attempt overwrites a manually set time.
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