[ntp:questions] Tobit LAN!Time DCF77 receiver not working

David Lord snews at lordynet.org
Thu Dec 24 00:39:15 UTC 2009


David Lord wrote:

......


> I can't remember if I tried radioclkd before using radioclkd2.
> 
> With radioclkd2 it needs 2 - 3 minutes before getting into
> sync, there being status displayed at each minute. I'm not
> sure if WWVB mode works but you may see failure to decode
> that before it finds DCF.

These are results from April 2009 using Conrad module:

Parse driver used mode 16 but my notes indicate mode 5 can be
used if power isn't being taken from serial port although it
looks as if you don't have any signal on RxD anyway in which
case parse driver isn't suitable.

I'm around 1000km from Frankfurt.

DCF77 + serial tty00:
      Driver(s)
(11) 8          me6000g(C3-600), NetBSD 5.0_RC4, Conrad DCF77 module
(12) 8          me6000g(C3-600), NetBSD 5.0.0_PPS, Conrad DCF77 module
                 "server 127.127.8.0 mode 133 # PARSE Conrad DCF77+PPS"
(13) 28         me6000g(C3-600), NetBSD 5.0.0_PPS, Conrad DCF77 module,
                 "radioclkd2 -s timepps tty00:-dcd"

Source Polls   % offset jitter   % offset jitter   % offset jitter  reach
                     (ms)  (ms)        (ms)  (ms)        (ms)  (ms)  !=377
(11)     110   50  1.746 0.921   95  5.113   bad  99.5 12.07   bad  7
(12)     160   50  1.911 0.854   95  9.162 5.186  99.5 87.49 466.4  12
(13)     152   50  0.825 0.433   95  3.789 2.648  99.5 7.095 6.047  14


David




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