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    Re: Time and cel nav, a stupid question
    From: Fred Hebard
    Date: 2008 Apr 22, 19:07 -0400

    Dan,
    
    The Mac is fine.  It's the AT&T cell phone that's slow!
    
    Fred
    
    On Apr 22, 2008, at 6:52 PM, Dan Allen wrote:
    
    >
    >
    > On 22 Apr 2008, at 4:26 PM, Fred Hebard wrote:
    >
    >> On a Mac, using time.apple.com.  Just synced, and still about 50
    >> seconds slow.
    >
    > That's very unusual.  I sync lots of Macs to time.apple.com and I am
    > never off more than 10 or 20 milliseconds, according to the Mac
    > Terminal command
    >
    >      ntpq -c peers
    >
    > which shows details of NTP servers and times.  I have tweaked my /etc/
    > ntp.conf file so that I can query several different servers and NTP
    > figures everything out.
    >
    > Here is a sample output of the ntpq -c peers command on my main Mac:
    >
    > ---
    >
    >       remote           refid      st t when poll reach   delay
    > offset  jitter
    > =
    > =
    > =
    > =
    > =
    > =
    > ======================================================================
    > ==
    > *clock.xmission. .GPS.            1 u  614 1024  377   24.369
    > -8.786   6.633
    > -time1.apple.com 17.106.100.13    2 u   19  256  377   38.468
    > -5.278  34.007
    > +time-b.nist.gov .ACTS.           1 u  419  256  376   88.355
    > 8.279  27.296
    > +tick.usno.navy. .USNO.           1 u  255  256  377   97.773
    > 10.332  19.811
    >
    > ---
    >
    > It shows four different servers that I am checking in with.  The
    > offset column is in ms and shows how far from those servers my machine
    > is.  The delay column shows the distance in ms to these servers.  The
    > jitter column combines errors in propagation along with absolute time
    > errors to come up with an overall error figure, also in ms.
    >
    > Dan
    >
    >
    > >
    
    
    
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