[time-nuts] Lady Heather

2015-03-09 Thread steve
I finally powered up my Trimble Thunderbolt (E) with a Motorola antenna. There is a 10 MHz output. Unfortunately, I can't get Lady Heather to tun more than 20 seconds without locking up. I have the same issue on 3 computers - a Lenova Windows XP desktop with serial port, a Toshiba laptop (USB

Re: [time-nuts] AVAR - S_Y conversion

2015-03-09 Thread Wolfgang Wallner
On 03/06/2015 10:29 PM, Magnus Danielson wrote: I have checked several sources, and they match up with the IEEE 1139 in this regard. I have also evaluated the equation for Allan variance for the random walk noise, and it matches up with the references and what I put here:

Re: [time-nuts] AVAR - S_Y conversion

2015-03-09 Thread Tom Van Baak
Hi Wolfgang, Have a look at the 20 plots in: http://leapsecond.com/pages/allan/Exploring_Allan_Deviation_v2.pdf This shows phase/frequency/ADEV+MDEV and PSD for 5 noise types. Zoom the PDF 400x if necessary. This was generated with Stable32 and should be 100% correct. See if your results

[time-nuts] NTP stratum 1 appliances with different (GPS, etc) cores...

2015-03-09 Thread Robert Seastrom
Hi folks, Had a recent requirement at $DAYJOB to give our NTP architecture a good swift kick in the pants. High precision is not a particular requirement (1 ms is more than adequate) but high reliability is. I'm about done with explaining the difference between the two to people internally

Re: [time-nuts] NTP stratum 1 appliances with different (GPS, etc) cores...

2015-03-09 Thread Neil Schroeder
Ones ive deployed: End run. BSD Microsemi S350 LINUX Meinberg MRS LINUX Others: Spectra com Brandywine The three i used were all very good. You want more re details I will put some effort into it. ___ time-nuts mailing list -- time-nuts@febo.com To

Re: [time-nuts] NTP stratum 1 appliances with different (GPS, etc) cores...

2015-03-09 Thread Bob Darlington
I run a Symmetricom Syncserver S300 at home and am trying to convince the fine folks at work that running ntpdate every 15 minutes is about the worst possible way to set time. I'm in the NTP.org pool but am open to direct peering if you ever get something setup:

Re: [time-nuts] NTP stratum 1 appliances with different (GPS, etc) cores...

2015-03-09 Thread Chris Albertson
The exact architecture you need depends a lot on how your company is geographically distributed and the network that connects those parts. If you have decided you want to run your own stratum 1 NTP servers then you'd place a few of those in each plant or in each city. Then your next level

[time-nuts] Lady Heather

2015-03-09 Thread Mark Sims
Lady Heather is set up to run the serial port at 9600,8,N,1 If it sees data errors, after around 20-35 seconds or so, it toggles to 9600,8,O,1 This feature was added to support the Trimble Resolution timing receivers. You can try the /rt command line option and see if that makes any