Atomic clock radio
Atomic clock radio
1312
• The clock will scan the DCF frequency signal and the DCF
symbol flashes on the LCD. When the signal is received
successfully after 3-5 minutes, the radio controlled time and
the DCF symbol appears permanently.
• In case the clock cannot detect the DCF-signal (for example
due to disturbances, transmitting distance, etc.), the Sym-
bol appears on the display.
• The time can be set manually. The clock will then work as a
normal quartz clock. (see 4.1 Setting of clock and calendar).
• Hold “+” button for 3 seconds to stop scanning DCF time
signal (DCF reception symbol disappears). Hold “+” button for
3 seconds again to reactivate scanning DCF time signal.
Radio controlled time reception
The time base for the radio controlled time is a Caesium Atomic
Clock operated by the Physikalisch Technische Bundesanstalt
Braunschweig which has a time deviation of less than one second
in one million years. The time is coded and transmitted from
Mainflingen near Frankfurt via frequency signal DCF-77 (77.5 kHz)
and has a transmitting range of approximately 1,500 km. Your
radio-controlled clock receives this signal and converts it to show
the precise time in summer or wintertime. The quality of the
reception depends greatly on the geographic location. In normal
cases, there should be no reception problems within a 1,500 km
radius around Frankfurt.
Please take note of the following:
• Recommended distance to any interfering sources like com-
puter monitors or TV sets is a minimum of 1.5 - 2 metres.
• Within ferro-concrete rooms (basements, superstructures), the
received signal is naturally weakened. In extreme cases, please
place the unit close to a window and/or point its front or back
towards the Frankfurt transmitter.
• During night-time, the atmospheric disturbances are usually
less severe and reception is possible in most cases. A single
daily reception is adequate to keep the accuracy deviation
below 1 second.
4. How to operate
4.1 Manual setting of clock and calendar
• Hold “ MODE” button for 3 seconds. The language abbrevia-
tion digit is flashing. Press “+” or “-” buttons to adjust the
language. Language abbreviations for the weekday: English
(EN), German (DE), French (FR), Italian (IT), Spanish (SP), Dutch
(DU).
• The setting sequence is shown as follow: Language, Year,
Month, Day, 12 HR or 24 HR system, Hours and Minutes. Press
“+” or “-” buttons to make the desired settings. With the last
setting the seconds are reset to zero.
• Holding “+” or “-” buttons, you will enter fast mode.
• The instrument will quit the setting mode, if there is no
button used within 30 seconds.
• If DCF reception is on, the manually set time will be over-
written by the DCF time when the signal is received success-
fully.
• Press “MODE” button to show the weekday instead of the
seconds.
4.2 Setting of time zone
• The time zone is used for the countries where the DCF signal
can be received but the time zone is different from the DCF
time.
• Press “MODE” button to select to view ZONE. Hold “MODE”
button for 3 seconds. The hour digit is flashing. Press “+” or
“-” button to adjust hours to your local time.
4.3 Radio Operation
• Push the “ON/OFF” button to switch on the radio. The re-
ceived radio frequency appears on the display.
• Press “SCAN” button to select the FM radio station. Each key-
press will increase the frequency by 0.05 MHz.
• Hold “SCAN” button for three seconds to start auto-scanning
for the next closest radio station.
• Press “VOLUME (+/-)” button to adjust the desired volume.
There are 16 steps of volume, the default setting is 7.
• If the reception is weak, try to orient the antenna for a better
reception.
• Press the “RADIO ON/OFF” button to switch off the radio.
TFA No. 98.1088 Anleitung 11.02.2008 16:56 Uhr Seite 7
