Re: [44net] new ntp server for amprnet

Well, an rPi can be a Stratum1 if it uses the PPS output from the GPS clock imho. (and from what I found on the net a few years ago) If it does not use PPS output it cannot be a Stratum1 imho because the jitter will be too high 73, Ruben - ON3RVH -----Original Message----- From: 44Net [mailto:44net-bounces+on3rvh=on3rvh.be@mailman.ampr.org] On Behalf Of Brian Kantor Sent: dinsdag 10 oktober 2017 11:26 To: 44net(a)mailman.ampr.org Subject: Re: [44net] new ntp server for amprnet I recall a rather heated debate from a number of years ago that was about whether a GPS-locked clock was a true stratum-1 or whether it should be considered a stratum 1.5 or something like that because it didn't really have direct access to an atomic clock. Of course NTP only has integer values for the stratum so the argument was somewhat moot, but it was somewhat thought-provoking "at the time". In the US, the surplus equipment market occasionally had GPS-trained oscillators that could provide 10Mhz and 1pps clocking as well as NMEA output. They were parts of CDMA cellphone base stations, each of which had at least two. The one I have was made by HP. I also have one that is a Motorola device that was used to synchronize simulcast transmitters in repeaters. Unfortunately, both of these devices draw more electricity than I am willing to spend on running them, here in San Diego which has the most expensive electric rates in the country. - Brian On Tue, Oct 10, 2017 at 10:11:18AM +0100, Chris via 44Net wrote: _________________________________________ 44Net mailing list 44Net(a)mailman.ampr.org https://mailman.ampr.org/mailman/listinfo/44net