On Thu, Aug 8, 2019 at 7:00 PM David J Taylor via time-nuts < time-nuts@lists.febo.com> wrote:
> Hi everybody! My first post here, I hope the subject is adequate for this > mailing list. > > I'm using a tiny layer 1 NTP server consisting of Raspberry Pi 3B+ with > Ublox MAX-M8Q expansion board providing GNSS (currently GPS, Galileo and > Glonass, sometimes I switch to Beidou, too) reference with PPS + a simple > patch antenna hanging near the window. Offset, jitter and rms are most > often smaller than 1 µs. The server is included in NTP pool. > > I'm using several Windows 10 machines on the same LAN, all using NTP client > software from Meinberg. The typical offset and jitter in those are about > 100-500 µs. I would like to make it lower. > [] > Thanks in advance for any suggestions! > > Adam Kumiszcza > ============================================ > > Adam, > > You could feed the PPS signal to the Windows PCs as one way of making the > performance better: > > https://www.satsignal.eu/ntp/setup.html > > Performance: > > https://www.satsignal.eu/mrtg/performance_ntp.php#windows-stratum-1 > Cheers, > David > Hi again! My raspi is now in a new location. The GPS signal is fine, the window is not south-facing, but the antenna is outside the window attached to a metal windowsill, and there are no buildings nearby. I'm coming back to the idea of distributing PPS signal. Do you think such a contraption could work? https://botland.com.pl/pl/raspberry-pi-hat-komunikacja/11707-serial-pi-plus-max3232-interfejs-rs232-dla-raspberry-pi-7426787870194.html I mean, stacking it over the uputronics board and soldiering some pins. The MAX3232 chip is the same as on these kind of devices: https://www.ebay.com/itm/MAX3232-RS232-to-TTL-Serial-Port-Converter-Module-DB9-Connector-MAX232/262241627343 Cheers, Adam _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.