[ntp:questions] NTP+ NMEA +GPS +PPS
hi I am somehow new to ntp. I am interested to sync a windows OS to GPS time. I have installed meinburg's ntp demon ntp-4.2@spider-man-2-win32-setup.exe inside win_server2008. 1-Is it possible to use a GPS receiver module (which also has PPS) to sync the pc using installed ntpd ? 2-Dose NTP able to use NMEA massages +PPS signal to sync PC's time? regards ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] NTP+ NMEA +GPS +PPS
On 12/08/2014 09:02, HVZ wrote: hi I am somehow new to ntp. I am interested to sync a windows OS to GPS time. I have installed meinburg's ntp demon ntp-4.2@spider-man-2-win32-setup.exe inside win_server2008. 1-Is it possible to use a GPS receiver module (which also has PPS) to sync the pc using installed ntpd ? 2-Dose NTP able to use NMEA massages +PPS signal to sync PC's time? regards 1. Yes, send the PPS signal to the DCD pin of your COM port. Usually a TTL-level signal will drive an RS-232 COM port. This is what I have on one system for a Sure GPS/PPS source: server 127.127.22.1minpoll 4 server 127.127.20.1minpoll 4 mode 18 fudge 127.127.20.1time1 +0.335 refid NMEA 2. Yes, like the arrangement above. You will find more information (but not, perhaps, a step-by-step guide) on my Web site. I suggest updating to a more recent version of NTP and Windows executables are also on my Web site. -- Cheers, David Web: http://www.satsignal.eu ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] NTP+ NMEA +GPS +PPS
On 12/08/14 09:02, HVZ wrote: I have installed meinburg's ntp demon ntp-4.2@spider-man-2-win32-setup.exe inside win_server2008. It is not Meinburg's demon, or even daemon. It is the reference implementation, with an installer configured by Meinburg. 1-Is it possible to use a GPS receiver module (which also has PPS) to sync the pc using installed ntpd ? 2-Dose NTP able to use NMEA massages +PPS signal to sync PC's time? Yes. See other reply. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] Handle ntp conf modification when ntp is already running
(Found unsent in my draft folder) Arthur Lambert writes: Hi, Thank you for all your answer. So in fact Jochen, even if I need for some reason to handle dynamic change on ntp.conf, you are telling me that it is cleaner and better to restart the daemon ? I'm not sure I'd agree that it is better/cleaner to restart the daemon. There may be some corner cases where the dynamic config stuff doesn't let you do/undo everything - in that case it would be better to find and fix these cases. I am currently putting some modification in my ntp conf file thanks to tr69 protocols. Moreover due to security constraints it is very hard for me to restart the ntp daemon.. It is quite strange that noone try to patch ntp daemon to handle runtime modification on ntp conf. Most folks have a strong preference for letting ntpd run for as long as possible. And I think you'll find that there can be a lot to do to undo everything that is in-place just to cleanly re-process an ntp.conf file. I also tried to use confi-from-file feature from ntpq without success. I add a ntp url in my ntp conf and run ntpq -c config-from-file /etc/ntp.conf. Then I am not able to see my new ntp url by running ntpq -p command. Have you tried running those commands from the ntpq CLI, with the :config directive? I also don't know if anybody has written a test case for the config-from-file stuff. That might be a good place to start - you can use the 'saveconfig' directive to test to see if your changes have been made. If I am able to create a clean patch to handle runtime modification I will be happy to share it. Please consider discussing your ideas with folks - you are looking at a lot of work and if you want to see your patches included in the main distribution it would be best if we all agreed on how things look. H -- Harlan Stenn st...@ntp.org http://networktimefoundation.org - be a member! ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
