Re: [time-nuts] PC time app

2011-11-26 Thread Jim Lux
On 11/25/11 9:56 PM, Steve . wrote: I'm curious as to what folks are doing with PC's that require micro second accuracy for days or weeks or what have you. Any examples? not microseconds, but milliseconds... Running multi-day tests in a spacecraft testbed where you've got PC-based test

Re: [time-nuts] PC time app

2011-11-26 Thread Chris Albertson
On Fri, Nov 25, 2011 at 9:56 PM, Steve . iteratio...@gmail.com wrote: I'm curious as to what folks are doing with PC's that require micro second accuracy for days or weeks or what have you. The way you get the reliability is easy, it just cost money. You set up multiple servers each with its

Re: [time-nuts] PC time app

2011-11-26 Thread Dennis Ferguson
On 25 Nov, 2011, at 21:56 , Steve . wrote: I'm curious as to what folks are doing with PC's that require micro second accuracy for days or weeks or what have you. Any examples? Curious, Steve I have a PCI-X board with an FPGA which implements a clock running at 320 MHz. The 320 MHz can

[time-nuts] PC time app

2011-11-25 Thread Don Latham
Just redoing a PC in the shop. Don't know if I've suggested a program called NMEATime to the nuts. I've had this program running on everything from Win2k to Win7, no hitches. It will sync the PC clock to either a GPS or to a network signal, at a chooseable update period. Highly recommended and

Re: [time-nuts] PC time app

2011-11-25 Thread paul swed
Good old nema time. Indeed I started using it on win98 or was it 95?? Way back is the right answer. In fact I have a very old laptop that essentially runs just that program. It also generates time codes. IRIG B as I recall and thats what really made it useful. Good top know they are still around

Re: [time-nuts] PC time app

2011-11-25 Thread Robert Darlington
I have a copy and I like it, however you can just set your system scheduler to update your clock more often. Win 7 is 1x a week out of the box but it's easy enough to set to once every 15 minutes if you want. It's also free.

Re: [time-nuts] PC time app

2011-11-25 Thread Don Latham
Yeah. I just found out that my XP and 7 systems can do this update. Red face! Just goes to show ya. Don Robert Darlington I have a copy and I like it, however you can just set your system scheduler to update your clock more often. Win 7 is 1x a week out of the box but it's easy enough to set

[time-nuts] PC time app

2011-11-25 Thread Mark Sims
If you have a Thunderbolt, Lady Heather will sync your time for free... It can sync the time via a keyboard command (TS) or via command line options on a regular basis, or whenever the system clock and GPS clock differ by a given amount. You can specify the inherent delay between the

Re: [time-nuts] PC time app

2011-11-25 Thread David J Taylor
Dunno. Does the NMEA driver work on the Meinberg NTP for Windows? Yes, although from some GPS devices the jitter may be worse than from Internet servers (depending on your connection). Given that NTP is free, works extremely well, is well documented, and can be monitored and managed

Re: [time-nuts] PC time app

2011-11-25 Thread Chris Albertson
On Fri, Nov 25, 2011 at 9:24 PM, David J Taylor david-tay...@blueyonder.co.uk wrote: Dunno.  Does the NMEA driver work on the Meinberg NTP for Windows? Yes, although from some GPS devices the jitter may be worse than from Internet servers (depending on your connection).  Given that NTP is

Re: [time-nuts] PC time app

2011-11-25 Thread Steve .
I'm curious as to what folks are doing with PC's that require micro second accuracy for days or weeks or what have you. Any examples? Curious, Steve On Sat, Nov 26, 2011 at 12:50 AM, Chris Albertson albertson.ch...@gmail.com wrote: On Fri, Nov 25, 2011 at 9:24 PM, David J Taylor

Re: [time-nuts] PC time app

2011-11-25 Thread David J Taylor
On Fri, Nov 25, 2011 at 9:24 PM, David J Taylor david-tay...@blueyonder.co.uk wrote: Dunno. Does the NMEA driver work on the Meinberg NTP for Windows? Yes, although from some GPS devices the jitter may be worse than from Internet servers (depending on your connection). Given that NTP is

Re: [time-nuts] PC time app

2011-11-25 Thread David J Taylor
I'm curious as to what folks are doing with PC's that require micro second accuracy for days or weeks or what have you. Any examples? Curious, Steve I hear of folks measuring time delay of off-air radio signals, where millisecond accuracy is required. Data from multiple receivers in

Re: [time-nuts] PC time app

2011-11-25 Thread Hal Murray
david-tay...@blueyonder.co.uk said: Yes, although from some GPS devices the jitter may be worse than from Internet servers (depending on your connection). I've been looking for good, low cost GPS gizmos, preferably with no soldering required. If anybody finds one, please let me/us know. The

Re: [time-nuts] PC time app

2011-11-25 Thread Hal Murray
I'm curious as to what folks are doing with PC's that require micro second accuracy for days or weeks or what have you. Any examples? The obvious one is you can be a real time nut. :) With a good clock, you can measure network delays. The normal way that ntp works is to exchange packets

Re: [time-nuts] PC time app

2011-11-25 Thread David J Taylor
From: Hal Murray Sent: Saturday, November 26, 2011 6:58 AM To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] PC time app david-taylor said: Yes, although from some GPS devices the jitter may be worse than from Internet servers (depending