[ntp:questions] Re: Question to NTP developers
David L. Mills
mills at udel.edu
Sat Aug 26 23:44:29 UTC 2006
Eugen,
The data for all servers except your GPS and PPS show nominal behavior
similar to the behavior observed here. The jitter for your serial
timecode and PPS both show 4 us, which is limited by the precision. So
far, no surprises. Hoever, your serial timecode and PPS offsets both
show zero, which is not
Dave
Eugen COCA wrote:
> Sorry - three time sorry - due to speed I misstyped ...
>
> Here are the numbers reported by ntpq on my best server:
>
> remote refid st t when poll reach delay offset
> jitter
> ==============================================================================
> +GPS_NMEA(1) .GPS. 0 l 42 64 377 0.000 0.000
> 0.004
> -ptbtime1.ptb.de .PTB. 1 u 220 256 377 48.516 -0.772
> 0.381
> -ntps1-1.cs.tu-b .PPS. 1 u 237 256 375 54.191 0.039
> 1.023
> -ntp-p1.obspm.fr .1PPS. 1 u 199 256 377 55.164 -0.540
> 1.607
> -gps-2.mit.edu .GPS. 1 u 229 256 377 147.056 0.018
> 1.822
> oPPS(1) .PPS. 0 l 9 16 377 0.000 0.000
> 0.004
> +ntp2.usv.ro .PPS. 1 u 61 64 377 0.273 -0.008
> 0.036
> -ntp3.usv.ro .PPS. 1 u 19 64 377 0.509 0.036
> 0.014
> -ptbtime2.ptb.de .PTB. 1 u 217 256 377 48.336 -0.307
> 0.350
> -gps-1.mit.edu .GPS. 1 u 217 256 377 147.112 -0.037
> 0.342
>
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