Table of Contents
Advertisement
SETTINGS
________________________________________
Radio-controlled clock
With your built-in radio-controlled clock, you are in possession of an
absolutely precise alarm and meeting clock which is automatically set to
the radio-transmitted time signals of the most precise clock in the world:
the atomic clock of the Physikalisch-Technischen Bundesanstalt (PTB – the
German national metrology institute). This clock is so precise that in 1 million
years a deviation of 1 second can be expected.
Your radio-controlled alarm clock receives "time telegrams" via long wave
77.5 kHz from the time signal transmitter DCF 77, located in Mainflingen
(24 km south-east of Frankfurt/Main). This time signal transmitter has a range
of 1500 km.
The device receives the station DCF 77 free of charge via the connected DCF
77 antenna everywhere, where a sufficient long wave reception is possible
with a good portable radio. In many cases, your radio clock receives the
time telegrams from a considerable distance from the station; however, the
local reception quality plays a significant role here.
The installed microprocessor of the radio-controlled clock processes the
received time telegrams and controls the quartz clock fully automatically.
After the clock is first activated, the DCF synchronisation is performed
immediately and subsequently every day at 2 am and 3 am. Depending
on the point of reception, synchronisation can take several minutes. During
this process, the »
« display flashes, if the signal is strong enough, in a 1
second rhythm of the received time telegram. After synchronization has taken
place, the »
« display begins to light up. If the »
« display disappear,
the synchronization was not successful.
In addition to the advantages of the time precision and the exact, to-the-second
wake-up and alarm signal, your radio clock sets itself fully automatically from
winter time to summer time.
ENGLISH 21
Advertisement
Table of Contents
