Radio-controlled clock
Radio-controlled clock
1918
•
Manual initialization can be helpful. Press and hold WAVE button for 3 seconds.
A brief beep tone will sound and the clock will scan the DCF frequency signal.
•
If the clock cannot detect the DCF-signal (for example due to disturbances, trans-
mitting distance, etc.), the time can be set manually. The clock will then work as a
normal quartz clock. (see 7.1 Manual setting of clock, time zone and calendar).
6.1 Radio-controlled time reception
The time base for the radio-controlled time is a caesium atomic clock operated by
the Physikalisch Technische Bundesanstalt Braunschweig. It 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 trans-
mitting range of approximately 1,500 km. Changeover from summer time or winter
time are automatic. The quality of the reception depends mainly on the geographic
location. Normally 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 computer monitors or TV
sets is at least 1.5 - 2 metres.
•
Inside ferro-concrete rooms (basements, superstructures), the received signal is
naturally weakened. In extreme cases, please place the unit close to a window to
improve the reception.
•
During nighttime, the atmospheric interference is usually less severe and recep-
tion is possible in most cases. A single daily reception is adequate to keep the
accuracy deviation below 1 second.
•
After the reception of the radio-controlled time you can set the alarm time (see
7.3 Setting of alarm clock).
Buttons (Fig. 2+3)
G: SNOOZE/BRIGHTNESS button
H: ALARM button
I. SET button
J: UP button
K: DOWN button
L: WAVE button
Housing (Fig. 2+3)
M:Battery compartment
N: Power adapter
6. Getting started
•
Pull off the protection foil on the display.
•
Insert the three batteries (3 x 1,5 V AAA). Ensure batteries polarity are correct.
Connect the power adapter to a wall socket. A brief beep tone will sound and all
LCD segments will light up for about 2 seconds. The batteries will operate as a
backup power source in case of power failure.
•
Important! Make sure that your household voltage is 230V! Otherwise your clock
may be damaged.
•
The clock will now scan the DCF frequency signal and the DCF symbol flashes on
the LCD. When the time code is received successfully after 3-10 minutes, the
radio-controlled time is displayed and the date and the DCF symbol are displayed
steadily in the LCD.
•
If the reception fails, scanning stops and will be repeated between 1.00 and 5.00
am.
Important: The display will be switched off while scanning the DCF signal.
TFA_No. 60.2505 Anleitung_01/12 24.01.2012 10:33 Uhr Seite 10
