Il 15/11/2014 16:18, Michael Black ha scritto: > Check your BIOS and see if you have CPU power save enabled. > I had some HP pizza boxes at one time that the clock went nuts when the CPU > scaled down. > Mike W9MDB Thanks for the advice, but I have disabled all of them It is a thermal problem verified also on other machines. Max error of 0.1 seconds is good for JT modes.
Sandro IW3RAB > -----Original Message----- > From: Alessandro Gorobey [mailto:algi...@libero.it] > Sent: Saturday, November 15, 2014 9:06 AM > To: wsjt-devel@lists.sourceforge.net > Subject: Re: [wsjt-devel] Experiments on ALL.TXT > > 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 > > ------------------------------------------------------------------------------ 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
