> From port-alpha-owner-clowenst=ucsd.edu@netbsd.org Mon May 29 14:20 PDT 2000
> To: "Charles M. Hannum" <root@ihack.net>
> Cc: Hal Murray <murray@pa.dec.com>, port-alpha@netbsd.org
> Subject: Re: Clock drift on Miatas
> Date: Mon, 29 May 2000 14:20:28 -0700
> From: Hal Murray <murray@pa.dec.com>
> 
> > > I think xntpd needs the clock to be within 500 ppm or the PLL won't 
> > > lock up.
> 
> > Is that actually documented anywhere?
> 
> I didn't find any clean statement in the html or man page.
> 
> It seemed pretty well known in the ntp community.  A couple of months 
> ago I was trying to track down a Linux clock bug on these machines.  
> One of the first responses I got back pointed out that limit.  (That 
> may be only for the new ntpd vs older xntpd.) 

	.../xntp3-5.93/debug.html

states "the NTP discipline algorithm ... can correct frequency errors
as large as 30 seconds per day."  This is 347 ppm.

    carl