Path: utzoo!utgpu!watserv1!watmath!att!pacbell.com!decwrl!sgi!shinobu!odin!sgi.com!scotth From: scotth@corp.sgi.com (Scott Henry) Newsgroups: comp.protocols.time.ntp Subject: Re: What means "drift" and "compliance" ? Message-ID: Date: 19 Feb 91 08:52:48 GMT References: <9102141633.AA20519@sayshell.umd.edu> Sender: news@odin.corp.sgi.com (Net News) Reply-To: scotth@sgi.com (Scott Henry) Distribution: inet Organization: Silicon Graphics Inc, Mountain View, CA Lines: 16 In-Reply-To: louie@SAYSHELL.UMD.EDU's message of 14 Feb 91 16:33:51 GMT Cc: mitch@csd.sgi.com l> If you take the "drift" number, and divide it by 4096, you will get the l> actual drift rate. If you want this number in terms of parts per l> million, multiply by 1000000. Is 4096 the exact conversion, or is the complicated table-lookup scheme exact and 4096 an approximation? If 4096 is the exact conversion, why the lookup table scheme in the first place? The lookup scheme is not especially linear for large values of drift, and I suspect that it may be the cause of machines with large drift values being unable to sync. -- Scott Henry / Traveller on Dragon Wings Information Services, / Help! My disclaimer is missing! Silicon Graphics, Inc / Politicians no baka!