On Jun 20, 2007, at 2:59 PM, Poul-Henning Kamp wrote: > In message <[EMAIL PROTECTED]>, > David Duchscher > writes: > >> I am looking at using a Soekris unit for NTP and was wondering if >> people have a recommendation for which board to use? Traffic will be >> low, no encryption. I was looking at the 4801 as I see netgate.com >> has a rack mount case for it but that is just a nicety and not >> requiredment. GPS clock we are looking at using is the GPS 17HVS. >> Any comments, suggestions, pointers, etc would be greatly >> appreciated. > > Go for the 4501, you can get much better precision if you throw > a GPS and possibly a good X-tal after it. > > John wrote up my design here: > > http://www.febo.com/pages/soekris/
That really is sweet. A couple of questions, if you have the time. The accuracy requirement for our setup is +/- 1 millisecond, do you think the 4501 plus the Garmin GPS unit with the standard clock crystal would be able to meet that requirement? The Garmin GPS 17HVS PPS line has a specification of +/- 1 microsecond. Secondly, do you have an idea of what the accuracy of the such a setup would be? It would be fun to build a very accurate NTP server but the requirements are not there. I am trying to keep things as simple and reliable as possible since I am not the only admin that will be maintaining the unit. At the same time, I rather not spend 400 for a Symmetricom NTS-150. As an example of our thinking, we decided on the Garmin GPS sensor for easy installation and it being designed for marine applications, would be able to handle the hot, long days of sun, and wet environment we have here. The Garmin manual is located here: http://www8.garmin.com/manuals/GPS16HVS_TechnicalSpecifications.pdf Thanks for your time, -- DaveD _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
