-----Message d'origine-----
De : Alan Melia [mailto:[email protected]]
Envoyé : vendredi 13 février 2004 12:25
À : [email protected]
Objet : Re: LF: Timing GPS
Hello again Jean-Louis. I had thought about that ( software
clock drift
dependent on cpu usage) and wondered whether it would be
possible to force
the software clock to sync with the hardware clock at regular
intervals
(say 30 mins) using the scheduler. This could possibly be run
behind the
capture program if not incorporated into it ?? I am not sufficiently
knowledgable about windows to now how to do it.
Cheers de Alan G3NYK
[email protected]
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: 13 February 2004 08:59
Subject: RE: LF: Timing GPS
Hi all
Please keep in mind that Windows operating systems are very poor "time
keepers".
They drift very quickly, depending on the programs you are running.
A drift of one second up to one minute per day is not
uncommon (specially
with "data crunchers" softwares like real time FFT computing)!
I'm not talking about the drift of the PC hardware clock
itself which is
quite good (the time base xtal oscillator drifts around 2 s
per month on my
own computer), but from the Windows time management.
It seems that the time management on the Windows multitask OS
has a very low
priority ...
I verified this on Windows 95, Windows 98 and Windows Me.
Any other experience with other operating systems ?
73 de Jean-Louis F6AGR
