[ntp:questions] Re: dcf77 receiver makes ntp unstable? (drift and offset get jumpy)

Folkert van Heusden folkert at vanheusden.com
Tue Feb 8 09:15:23 UTC 2005

> > When I switch on my DCF77 receiver, my ntp-server suddenly gets very unstable:
> > http://keetweej.vanheusden.com/ntp_graph.png
> > (the blue line indicates start of DCF77 receiver).
> > Running ntpq 4.2.0a at 1.1190-r on a P-III (1GHz) with Linux (2.6.9).
> Can I suggest making a serial patch lead so that instead of the DCF signal
> being delivered to the RxD line of the serial port it is sent to DCD, CTS
> or DSR and you run my radioclk software instead. It sets DTR and RTS to
> power the device on, though you might need to hack the source a bit.

Nah, I prefer software solutions as I'm not so solderingiron-happy.

Folkert van Heusden

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