[time-nuts] DCF77 question
ehydra at arcor.de
Thu Oct 13 09:01:33 EDT 2011
asmagal at fc.up.pt schrieb:
> "DCF77 marks seconds by reducing carrier power
> for an interval beginning on the second".
> This is not a good (Heaviside step) time marker.
The amplitude is carefully crafted to signal and transmit antenna.
> Is it possible to decode that signal by any very
> simple "on-my-shelf gear", as for instance a PC
> sound card,to recover a good seconds time mark?
> Do you know some software to perform the above task?
You need a wide-band sound-card like EMU0202 and SpectrumLab. This
software contains the needed tracking software. A simple JFET or
low-noise OpAmp as preamplifier for a 1 metres wire-antenna.
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