[ntp:questions] Tobit LAN!Time DCF77 receiver not working
Rob
nomail at example.com
Fri Dec 25 10:09:35 UTC 2009
Marc-Andre Alpers <m-a.alpers at web.de> wrote:
> Es schrieb David Lord:
>
>> I've fudged the SHM with
>> "fudge 127.127.28.0 time1 0.024550 refid MSFa"
>
> I'm about 400km away from DCF77. What a fudge should I use?
The fudge is determined by the way the clock interfaces to the computer
(via RXS introduces a large delay compared to a handshake line), the
delay in your receiver, and the delay of the radio signal. There is
no single formula to get it correct, I'm afraid.
> Actuell ntpq -p from over night running PC.
>
> remote refid st t when poll reach delay offset jitter
> ==============================================================================
> LOCAL(0) .LOCL. 10 l 56 64 377 0.000 0.000 0.001
> *SHM(0) .DCF. 0 l 19 64 377 0.000 0.390 0.264
> europium.canoni 193.79.237.14 2 u 901 1024 377 52.403 -24.525 1.784
> s1.uruz.org 82.96.64.2 2 u 886 1024 377 41.949 -7.581 1.797
> sun.raveisking. 244.194.111.255 3 u 899 1024 377 32.239 16.241 13.018
> simbx01.sixxs.n 5.60.127.116 2 u 913 1024 377 53.695 -66.847 19.488
>
> MfG Marc-Andre Alpers
Get a better set of time references on the network (that a referenced
off a GPS or similar clock) and that agree to eachother.
With this set, there is no way to tell where you are.
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