ADE CK 2310-1 Operating Manual page 54

The radio-controlled alarm clock automatically
switches to reception several times every
night. During this process, the displayed time
is compared with that received from the time
signal transmitter and, if necessary, corrected.
If a sufficiently strong signal has not been
received, the radio-controlled alarm clock will
cancel the receiving process after a few minutes
and the radio tower symbol goes out. The
receiving process is started again at a later point
in time. In this case, the time proceeds as usual
(beginning with the start time of "00:00").
Checklist when data is missing on the
display
1. Check whether the location of the radio-
controlled alarm clock is suitable, see
"Choosing a location".
54