RETOX 83 22 10, Instruction Manual, Page: 13 / 22

9
Operating
Introduction
This radio controlled clock supports reception of the DCF time code
signal. The automatic functions of the movement are an initial setup,
receiving and adjusting of hands during first start, adjusting hands
position to correct time, and daily checking of absolute hands
position with adjusting if required.
This radio controlled clock movement has two motors and uses
3 hands to show analogue time. The movement is designed for use
with the German time code transmitter DCF 77 on 77,500 kHz.
Summer-/winter time change takes place automatically.
Information on the DCF77 Time Signal
This radio controlled clock picks up the time information from the
Caesium Atomic Clock at the Physikalisch-Technische Bundesan-
stalt at Braunschweig/Germany. Such Caesium Atomic Clocks have
an accuracy of +/- 1 second in 1 million years. The signal is coded
and transmitted from the station at Mainflingen.
The station has an effective range of about 2000 km and broadcasts
on a frequency of 77.5 kHz. If the clock is unable to pick up the
signal, hold the M.SET key to setup the time manually and to switch
to quartz mode. When the clock picks up the DCF77 signal, it
readjusts itself (see chapter “Operating the radio controlled clock”).
DCF77 stands for
 D for Deutschland (Germany), C as indicator
for a long wave signal, F for Frankfurt (Mainflingen is close to
Frankfurt), and 77 for the frequency.
Inserting/replacing the Battery
 Twist the rear part of the housing counter clockwise from the
clock.
 Insert a new battery of the type LR6 (AA) into the battery com-
partment. Pay attention to the proper polarity of the battery. The