David T. Ashley wrote: > "Richard B. Gilbert" <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED] > >>David T. Ashley wrote: >> >>>Any insight into whether 24 PPM is excessive for my server? >> >>Consider that a computer manufacturer typically spends something like $2 >>US on the components for the clock! <snip>
>>24 PPM is pretty good. Anything up to a hundred or two will usually work >>just fine. > > > Thanks. Interesting. It seems to be a really steady error, i.e. seems to > always be between 24 PPM and 24.5 PPM. > > I think I'll write a little software to plot it at a sampling frequency of > once per hour. I'm wondering if it varies by time of day, temperature, etc. > I think you will find that the frequency correction varies with the temperature inside the computer case. A really high quality clock would put the quartz crystal inside a tiny "oven" in order to maintain a constant temperature and, therefore, a constant frequency. The computer manufacturers won't do it because it wouldn't earn them a cent! _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
