[ntp:questions] Simple leap-second checker available

2009-03-21 Thread David J Taylor
Simple leap-second checker available Folks, I wanted to know which of the servers I was synching to was sending out those pesky incorrect leap-second announcements, so I wrote a simple program to automate the steps I had been requested to follow: You can download the program here. http://w

[ntp:questions] Stick to PPS, even if the prefer server fails

2009-03-21 Thread alkope...@googlemail.com
Hi My setup is as follows: Server A <--- GPS | | Server B <--- HP cesium frequency normal Server A gets it's timestamps from GPS. Server B gets it's timestamps from Server A and PPS from the HP cesium. Server A is marked as prefer because otherwise PPS won't work. My problem is: If Server A

Re: [ntp:questions] Stick to PPS, even if the prefer server fails

2009-03-21 Thread David J Taylor
alkope...@googlemail.com wrote: > Hi > My setup is as follows: > > Server A <--- GPS > | > | > Server B <--- HP cesium frequency normal > > > Server A gets it's timestamps from GPS. > Server B gets it's timestamps from Server A and PPS from the HP > cesium. Server A is marked as prefer because

Re: [ntp:questions] Stick to PPS, even if the prefer server fails

2009-03-21 Thread David Mills
David, You describe the intended behavior. The PPS should still be enabled, even if the prefer source comes dark. Check with the ntptime program. and confirm that the PPSTIME bit is lit. Dave David J Taylor wrote: >alkope...@googlemail.com wrote: > > >>Hi >>My setup is as follows: >> >>Serv

Re: [ntp:questions] refclock on Windows graphs

2009-03-21 Thread Danny Mayer
David J Taylor wrote: > Dave Hart wrote: > [] >> The 150us offsets are while slewing to try to catch up with the 3ppm >> frequency shift as the heat comes on. I have to imagine a Windows PC >> with a more stable oscillator (lower temperature coefficient to >> frequency) would do better, though I'm

Re: [ntp:questions] refclock on Windows graphs

2009-03-21 Thread Danny Mayer
Unruh wrote: >> most accurate estimate of the remote clock. The new interpolation >> scheme converts a counter to a timestamp by selecting from a history >> of recent correlated OS time & counter values the one which calculates >> the latest timestamp, based on the observation that all error >> as

Re: [ntp:questions] refclock on Windows graphs

2009-03-21 Thread Dave Hart
On Mar 21, 9:31 pm, ma...@ntp.org (Danny Mayer) wrote: > Just build the NTP simulator that comes with the NTP sources. There are > config options you need to build this. David J Taylor uses Windows pretty much exclusively. Have you ever built the ntpd simulator on Windows? I can't point to an ex

Re: [ntp:questions] Stick to PPS, even if the prefer server fails

2009-03-21 Thread Dave Hart
On Mar 21, 1:51 pm, "alkope...@googlemail.com" wrote: > > If Server A loses the GPS signal, it falls back to LOCAL and begins to > drift away. In the beginning Server B doesn't care about that and > stays to the PPS. But later it disconnects PPS and runs on Server A > again. So both servers drift