Introduction - Grundig Sonoclock 740 Handbuch

INTRODUCTION

Radio controlled clock, DCF 77
With your radio controlled clock Sonoclock 740, you are
in the possesion of an absolutely precise alarm- and
appointment clock which sets itself fully automatically to
GB
the radio-transmitted time signal of the most accurate clock
in the world: the atomic clock of the Bundesanstalt
(Federal Standards Institute) in Braunschweig/Germany
(PTB). The time deviation is smaller than 1 second in 1
million years.
Your radio controlled alarm clock Sonoclock 740 receives
time 'telegrams' on the longwave band (77.5 kHz) from
the official German standard frequency and time signal
transmitter DCF 77, located in Mainflingen (24 km south-
east of Frankfurt/Main). This transmitter has a range of up
to 1500 km.
Your Sonoclock 740 receives the DCF 77 transmitter free
of charge via the DCF 77 antenna in any place where
reasonable longwave reception is possible with a good
portable radio. In many cases, your alarm clock receives
the time telegrams at a considerably greater distance from
the transmitter, but here the local reception conditions play
an important role.
The built-in microprocessor of your alarm clock processes
the received time telegrams and controls the clock fully
automatically. As soon as reception of the DCF time signals
is possible again after an interruption, the clock will imme-
diately be synchronized. In addition to the advantages of
time precision and a wake-up signal accurate to the
second, the radio controlled Sonoclock 740 adjusts itself
automatically from normal time to summer time, and vice versa.
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Selection switches for alarm
– Radio is switched on at alarm time
/ – Alarm tone sounds at alarm time
OFF – No alarm function
– DOWN/ – For setting the time (clock and alarm time).
+ UP For setting the date
WEC – To switch the WeekEnd Cancellation function on
and off
ON/OFF – Press to switch the radio on and off
– Press to switch off the alarm tone (or radio) when
alarm function is activated
– For switching off the radio before the preset
'sleep' time has elapsed
SLEEP – For switching on the radio for max. 90 minutes
TIME – Used with – DOWN/+ UP to set the time manually
ALARM 1/ – Press briefly to display the present alarm time
ALARM 2 Used with – DOWN/+ UP to set the alarm time
SNOOZE/ – For interrupting radio or electronic sound alarm
CALENDAR for approx. 5 minutes
– Press once to display the date
– Press twice to display the year
– Press once and hold to adjust the date manually
– Press twice and hold to adjust the year manually
VOLUME – For adjusting the volume
TUNING – For selecting the frequency
DIMMER – to set the brightness of the display
HI/LOW
CONTROLS
and