3 ms·
If you have a Raspberry Pi laying around and want to run your own Stratum 1 NTP server - https://austinsnerdythings.com/2021/04/19/microsecond-accurate-ntp-with
by auspiv 3y ago
If you have a Raspberry Pi laying around and want to run your own Stratum 1 NTP server - https://austinsnerdythings.com/2021/04/19/microsecond-accurate-ntp-with-a-raspberry-pi-and-pps-gps/ https://austinsnerdythings.com/2021/04/19/microsecond-accura...
- fanf2 3y agoNote that for NTP it’s better to use a Raspberry Pi 4 than older boards. The old ones have their ethernet port on the wrong side of a USB hub, so their network suffers from millisecond-level packet timing jitter. You will not be able to get microsecond-level NTP accuracy. For added fun, you can turn the Raspberry Pi into an oven compensated crystal oscillator (ocxo) by putting it in an insulated box and running a CPU burner to keep it toasty. https://blog.ntpsec.org/2017/03/21/More_Heat.html https://blog.ntpsec.org/2017/03/21/More_Heat.html (infohazard warning: ntpsec contains traces of ESR)
- ianburrell 3y agoThat's a Stratum 0 server since it gets its time from GPS. Stratum 1 server is one that gets its time from Stratum 0 servers.
- fanf2 3y agoStratum 0 is the reference clock itself; stratum 1 is an NTP server attached to one or more reference clocks. https://www.ntp.org/ntpfaq/ntp-s-algo/#5111-what-is-a-reference-clock https://www.ntp.org/ntpfaq/ntp-s-algo/#5111-what-is-a-refere...