Dick Dievendorff wrote: > > > Recent versions of Windows (certainly XP and beyond) include an NTP client
Although it may not matter if you only want a non-resillient time source accurate to a few seconds, XP only contains a (broken) implementation of SNTP, not NTP. Windows 2003 contains an implementation of NTP, which is broken out of the box (it will not work against a real NTP server, and will accept time from servers indicating that they don't have a valid time), but may be configured to be compliant, or at least less broken. Out of the box, these all poll too slowly for tight time control, although well enough for Windows Kerberos to work. > that can synchronize with one of several NTP servers. You right click the NTP requires several, as much of the specification is about using multiple servers to detect server problems and improve the time quality. > time in the status bar, choose "Adjust Date/Time", select the "Internet > Time" tab, optionally provide an alternate NTP server and punch the "update Two servers isn't enough, with true NTP, to isolate a faulty server. > now" button. No special NTP client code is required to get to the accuracy > necessary for this sort of task. However, to get accuracy of the order of the tick interval on Windows, you need to use the open source reference implementation of NTP, rather than W32Time, and to get accuracy of the order of 10s of microseconds, you need to use Unix and a clock with a pulse per second output. For wristwatch and eyeball accuracy for logging W32Time may be OK, but not, especially out of the box, for anything that requires accurate time synchronisation. -- David Woolley "The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio" List Guidelines <http://www.elecraft.com/elecraft_list_guidelines.htm> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
