Hi Paul and all, I am using the windows Meinberg porting of NTP In ntp.org there is a sub-site support.ntp.org that give a lot of informations My discussion is over very poor quality of some chip sets used. The HP Pavilon g series is less than poor for the clock. The protocol used is continuous correct the time, and looking in NTP logs it is in the 100mS range, too large for a actual technology. But a good chip can be expensive, so normally is used the cheapest See this link http://datasheets.maximintegrated.com/en/ds/DS3231.pdf or other clock generators Using the same program in a couple of old computer the logs show a 20x 50x better values
The initial discussion was about how many DT over 1 second I found in "CQ" decoded. There is a lot of JT65 users OOT (Out Of Time) Best 73 de Sandro IW3RAB Il 15/11/2014 12:12, Paul DU2/WA8UGN ha scritto: > Hi Sandro and all: > > Alessandro Gorobey <algiuga@...> writes: >> Il 14/11/2014 19:06, Claude Frantz ha scritto: >>> On 11/14/2014 06:39 PM, Alessandro Gorobey wrote: >>> >>>> Now time problem. The NTP protocol can maintain synchronized the clock >>>> with a reference, but normally on a good quality laptop have a very > poor >>>> quality clock. Looking at the results of NTP I can see drift of 100mS > in >>>> 12 hours from shutdown and startup. >>> I think that NTP is a good solution if a server is running on your >>> laptop. If an Internet connection is available, you can use some NTP >>> servers available in this network. If not, you can use a GPS mouse >>> and/or a receiver for standard time signals. >>> >>> Best 88 de Claude >> Perfect agree Claude >> I have the server running on my laptop. >> If I turnoff the computer for 12 or 24 hours, the internal clock is too >> poor to maintain the time. >> So an error of 100 mS is normal and will be corrected in short time but >> will never be perfect. >> Few and rare machines that I tested for experiment has an internal clock >> that avoid this initials errors and a lot of drift. >> The common chip-sets are not capable to maintain a few mS in all >> condictions. >> >> Best 88 de Sandro IW3RAB > You can synchronize your laptop's internal clock with NTP by creating a > Time Synchronization Task in the Task Scheduler of your W7/64 laptop. For > ease of description and to save space here, please follow this link to > learn how to do it. > > http://www.pretentiousname.com/timesync/index.html > > Also, you should change your laptop's Internet Time server to an NTP > Internet Time Server that is more accurate than time.windows.com and is > physically closer to your QTH. > > Best 73 de Paul DU2/WA8UGN > > > > ------------------------------------------------------------------------------ > Comprehensive Server Monitoring with Site24x7. > Monitor 10 servers for $9/Month. > Get alerted through email, SMS, voice calls or mobile push notifications. > Take corrective actions from your mobile device. > http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
