Chris Vogel's avatar
Chris Vogel
@me@chrichri.ween.de

Big fun! 🙃 Got a logic analyzer, because receiving the DCF77 time signal fails often.

The definition how the signal is supposed to look is simple and clean and there must be a better way to ignore the wrong pulses.

screenshot of a pulseview window: one line 'D0' channel with pulses at least every second. Most of the pulses 100ms or 200ms, but at some times shorter pulses. Protocol DCF77 decoding is one line below the pulses showing read '0' and '1' values and their interpretion as 'Special bits', '60 minutes', '33 hours', '10 days', 'month 22 (invalid)' *eg* and 'year 90'. It's obvious that the protocol decoder got confused by the extra pulses created by interference.