TFA 98.1087 Instrucciones Para El Manejo página 8

TFA_No_98.1087_Anl_09/10
Radio controlled alarm clock with thermometer
3. Getting started
• Insert the batteries 2 x 1,5 V AAA into the battery compart-
ment, observing the correct polarity.
• The clock will scan the DCF frequency signal and the DCF sym-
bol flashes on the LCD. When the signal is received successfully
after 3-5 minutes, the radio controlled time and the DCF symbol
appear permanently. The clock automatically scans the time
signal every hour to maintain accurate timing.
• In Daylight Saving Time "S" is shown on the LCD.
• If the reception fails, activate the reception manually by hold-
ing "WAVE" button for 3 seconds.
• The wave display shows the signal receiving status:
Normal reception status
Weak signal
• In case the clock cannot detect the DCF-signal (for example due
to disturbances, transmitting distance, etc.), the time can be set
manually. The clock will then work as a normal quartz clock.
(see 4.1 Setting of clock and calendar).
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09.09.2010 14:06 Uhr Seite 8
Radio controlled alarm clock with thermometer
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 compu-
ter 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 recep-
tion is adequate to keep the accuracy deviation below 1 second.
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