Chronoskop CHR-9 Timegrapher
User manual
www.CHRONOSKOP.com
26
5. Calibrating the quartz frequency
External DCF radio receiver is an optional accessory and can be ordered separately.
5.1. About the calibrating with DCF77 radio signal
The calibrating of the internal quartz results from comparison with the radio signal of the
atomic clock in Mainflingen near Frankfurt Main (Germany). DCF77 is a time signal emited
on the long radio wave. DCF77 is emited on the 77.5 kHz frequency as time information in
coded form and has a broadcast range of about 2000 km in radius around Mainflingen. In
DCF77 signal is the time of the next minute coded. The DCF77 signal is the definition of
"right time" of Germany.
ATTENTION! The reception of the signal is depending on location and is not guaranteed
outside of Germany! The reciver is not always included and must be possibly ordered
separately. Neither the timegrapher nor the reciver should be connected to other devices
with with S-Video port! Danger of a destruction!
Calibrating the quartz frequency can be
selected directly from the main menu. To
calibrate connect the radio reciver to the 4-pin
Mini-Din socket with the provided cable. For a
better recive in enclosed spaces, the reciver
should be placed close to a window. The
reciver is not allways added to the set.
