[ntp:questions] no ntp synchronisation: 2s to 6s time shift !

Richard B. Gilbert rgilbert88 at comcast.net
Thu Feb 21 15:12:02 UTC 2008

Thierry MARTIN wrote:
> Hello Serge,
> You're right! I missed the -b option in ntpdate.
>  > That's very doable, but requires some amounts of efforts. ;-)
> I understand that.
> The system is a "transportable" system. It is used to mesure some 
> transmission time over a network (packets contain utc timestamp 
> themselves). It can be moved to different sites in the network.
> Maybe I should look for a pci board that is able to keep good time - 
> even with offset but limited drift- with no external time source...
> If anyone has ever heard of this...


Both Meinburg Funkuhren and Symmetricomm offer PCI cards with "super 
clocks".  An Oven Controlled Crystal Oscillator (OCXO) is available on 
these cards for a premium price.  The oscillator can, I believe, be GPS 
disciplined on either card.

Be prepared for "sticker shock"!   These cards cost around $1200 US the 
last time I looked and they may cost more now.  I have occasionally seen 
them for less on e-Bay but that's not something you can count on finding 
when you want it.

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