Path: utzoo!attcan!uunet!dg-rtp!bigben!bigben!philip From: philip@beeblebrox.dle.dg.com (Philip Gladstone) Newsgroups: comp.protocols.time.ntp Subject: Setting fudge factors for reference clocks Message-ID: Date: 5 Nov 90 17:32:59 GMT Sender: usenet@dle.dg.com (Net News) Distribution: comp Organization: Data General, Development Lab Europe Lines: 22 I have been running xntp for some time now with a couple of local stratum 1 clocks and some remote clocks. I have noticed that there seems to be a persistent difference of a few millisecs between my clocks and some of the US clocks. [I'm in the UK!]. I happen to know that my clocks are not very good at finding the actual 'start-of-second' pulse -- analog circuitry and all that. However, I beleive that the edge that I get is within 1 ms of real time. The question is: How correct are the stratum 1 clocks? Is the precision an accurate estimate? Does anyone have any neat tools for recording time difference information over a period of a few weeks to construct graphs etc? -- Philip Gladstone Development Lab Europe Data General, Cambridge England. +44 223-67600