[ntp:questions] Re: GPS solution for Win32?

Adam Butler adambutler100 at hotmail.com
Sat Oct 1 23:20:29 UTC 2005

Thanks for the comments Brad and Danny.

I'm working on a linux box now which should do better than my win32 box.
I do have a linux box running apache for a lightly loaded web server now.
Would it be wise to use this machine for my purpose?
I only need accurate time for my private LAN but I want it to be very 
I need maybe 500 millisecond accuracy.
And that is on the server only. I'm not worried about the win32 clients 

"Brad Knowles" <brad at stop.mail-abuse.org> wrote in message 
> At 12:49 AM -0500 2005-09-29, Adam Butler wrote:
>>  I am looking for a cheap or free solution for using a Garmin 18 LVC with 
>> Win
>>  2003 server.
>>  I'm looking for something that will use the GPS unit for the accurate 
>> clock
>>  source and also be a server for the domain.
> According to the documentation I read on the Meinberg pages, most of the 
> binary NTP implementations that you can download and install are not 
> pre-built with support for refclocks.  In the Meinberg case, what they do 
> is provide a special driver to allow you to directly slave your system 
> clock to the GPS without going through NTP, and then have NTP serve time 
> to its clients based on the system clock.
> If you want to do this the normal NTP way, you'll either need to find NTP 
> binaries built with support for your particular refclock (or all 
> refclocks), or you'll need to build your own binaries.
> Of course, you then run into all the standard 
> hardware/BIOS/APIC/APCI/software configuration issues that are common with 
> Windows, primarily having to do with a relatively high frequency of lost 
> clock interrupts, which make it difficult or impossible to be able to 
> successfully synchronize your system clock to your refclock, or to be able 
> to serve time to your clients.
> -- 
> Brad Knowles, <brad at stop.mail-abuse.org>
> "Those who would give up essential Liberty, to purchase a little
> temporary Safety, deserve neither Liberty nor Safety."
>     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
>     Assembly to the Governor, November 11, 1755
>   SAGE member since 1995.  See <http://www.sage.org/> for more info.
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