From: Shark8 <onewingedshark@gmail.com>
Cc: mailbox@dmitry-kazakov.de
Subject: Re: Any leap year issues caused by Ada yesterday?
Date: Tue, 6 Mar 2012 11:08:37 -0800 (PST)
Date: 2012-03-06T11:08:37-08:00 [thread overview]
Message-ID: <9778287.445.1331060917464.JavaMail.geo-discussion-forums@ynes7> (raw)
In-Reply-To: <z3eblji2o1wx.1ts993li80h61$.dlg@40tude.net>
On Tuesday, March 6, 2012 11:37:35 AM UTC-6, Dmitry A. Kazakov wrote:
>
> If the sources of the TSC and of the system clock are different, then there
> is a systematic error. I suppose this is the major reason why it did not
> work under VxWorks. The system time must be derived from the same quartz.
> Otherwise you have to compensate the deviation, which could well be as big
> as 5 microseconds per second.
Really? I thought the whole point of using Quartz crystals was because they vibrate at a precise rate; or is the problem analogous to the "beats" that you hear when two musical instruments* are slightly out of tune?
(*Guitar comes immediately to mind; especially as it uses that as part of the tuning process.)
next prev parent reply other threads:[~2012-03-06 19:10 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-01 13:06 Any leap year issues caused by Ada yesterday? Georg Bauhaus
2012-03-05 11:07 ` tonyg
2012-03-05 15:59 ` Shark8
2012-03-05 18:03 ` Dmitry A. Kazakov
2012-03-05 18:30 ` Simon Wright
2012-03-05 20:17 ` Dmitry A. Kazakov
2012-03-05 20:56 ` Simon Wright
2012-03-06 8:47 ` Dmitry A. Kazakov
2012-03-06 9:20 ` Simon Wright
2012-03-06 10:07 ` Dmitry A. Kazakov
2012-03-06 10:51 ` Georg Bauhaus
2012-03-06 11:16 ` Dmitry A. Kazakov
2012-03-06 16:46 ` Simon Wright
2012-03-06 17:37 ` Dmitry A. Kazakov
2012-03-06 17:59 ` Simon Wright
2012-03-06 19:18 ` Dmitry A. Kazakov
2012-03-06 20:22 ` Simon Wright
2012-03-06 19:08 ` Shark8 [this message]
2012-03-06 19:40 ` Dmitry A. Kazakov
2012-03-06 21:00 ` tmoran
2012-03-06 21:37 ` Simon Wright
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