On Tue, 6 Aug 2013 13:07:28 +0000 "Mark C. Stephens" <ma...@non-stop.com.au> wrote:
> I am not really sure what you are trying to do either.. > > If you are trying to tee the output of a GPS, make a Y cable and > connect TxD from GPS and DCD to each end (as PPS and NMEA are > broadcast or one way if you like) once the receiver has been > configured. You will have timenuts having strokes if you try and do > it in software! > > However if you are hell bent on generating PPS in software somehow > (please let me know you plan? - curious) Use > http://www.curioustech.net/xport.html Been around for years and its > pretty good and free to boot. > > Or am I still looking at your problem from the wrong end? > > Personally, I am moving my NTP server to the parallel port shortly. > > > --marki > > > > > > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > On Behalf Of Eugen Sent: Tuesday, 6 August 2013 10:32 PM > To: time-nuts@febo.com > Subject: Re: [time-nuts] Generate 1 PPS signal on serial port > > > Marki the "smart" search engine came back with: > > > > Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html > > Pulse-Per-Second (PPS) Signal Interfacing Hardware: > > http://www.vk2hmc.net/blog/?p=583 > > > > If using Linux you need kernel version > 2.6.39.4 or version 3 > > kernel as the PPS interface is now included in the kernel. Unless > > of course, low latency and jitter is not an issue for you ;) You > > can use either parallel or serial PPS. > > > > For windows see http://www.davehart.net/ for binaries. > > David Taylor pretty much covers it here: > > http://www.satsignal.eu/ntp/NTP-on-Windows-Vista.html > > Thanks, but I need it the other way: the PC itself should generate the > 1 PPS signal without an external reference, except the network > connection to NTP servers. It's more of a software problem. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow > the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow > the instructions there. No, I don't use a GPS or other synchronization hardware. The PC uses only network communication with NTP, and the PC itself should output an 1 PPS signal on a port serial / parallel. I want to analyze the 1 PPS signal generated by the PC and the synchronization process or to compare two 1 PPS signals generated by different computers. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.