OT setting your computer to NIST

[Lynn W. Taylor, WB6UUT]

GPS time is extremely accurate.  If you have multiple computers, you can
run your own NTP server synced to GPS.

On 6/27/2015 4:32 PM, WA8JXM wrote:
> Any suggestions to handle the delay caused by satellite internet
> access (typical 800 ms ping time)?
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[KEN-3]

So you are saying that NTP should still synchronize my computer clock
accurately?

On 27/06/2015 20:06, Walter Underwood wrote:

> This is exactly what NTP was designed to handle, synchronizing clocks with long latency. If the variance is small, NTP can sync clocks very accurately.
>
> wunder
> K6WRU
> CM87wj
> http://observer.wunderwood.org/  (my blog)
>
> On Jun 27, 2015, at 4:32 PM, WA8JXM<[hidden email]>  wrote:
>
>> >Any suggestions to handle the delay caused by satellite internet access (typical 800 ms ping time)?
>> >
>> >
>> >

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Gary Smith-2]

Gentlemen,

I have today tried each and every one of your suggestions for a
"correct" server to sync and ever one of them has failed for me.

While I am truly happy these options work for you, they do not work
for this computer or any of the other computers I use.

The 3rd party software, however, does work without a hiccup on this
computer.

My only interest in my original posting of this was to provide
information to any of us who have difficulties in syncing their
computer to the correct time, so they will know a viable option to
deal with this problem.

I suspect this has been beaten to death and Eric will be soon telling
us to can it, so lets let it go at this point.

73,

Gary
KA1J

---
This email is free from viruses and malware because avast! Antivirus protection is active.
https://www.avast.com/antivirus

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Edward R Cole]

I also use tick.nobs.navy.mil for several years (2003) with my xp32
machine using D4 (mainly for JT65 on eme).
I have a frequent sync rate so time is rarely off more than 0.020s.
Dimension-4 is freeware and easy to setup.

I tried some other NIST programs in the past returned to using
D4.  Its my belief that it is used by very many eme'rs so not sure
where the comment by GIMHU came from that represented "most eme'rs
having switched away from D4".  I was never asked in any survey about
what I am using.

73, Ed - KL7UW
---------------
Myself, I use  tick.nobs.navy.mil with no problems at all.  It's at the
US Naval Observatory and is one of the group used to determine NIST
time.  My first engineering job was at the US Naval  Research Laboratory
so I have a (misplaced ?) loyalty to NObs !  :)

Happy Hamming.

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402


73, Ed - KL7UW
http://www.kl7uw.com
     "Kits made by KL7UW"
Dubus Mag business:
     [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[David Woolley (E.L)]

If you are using pool servers, best practice is to specify at least four
(that's the reason for having 1., 2., etc., so that you can select four
different ones).  That way, if one of the them goes rogue it will be
exlcuded from the time solution but you will still have enough for a
correct time (there is a theory as to why three isn't enough).  I
believe that Windows supports the use of multiple servers and the NTP
mitigation rules for deciding which ones are good, but you will probably
have to go to the registry.

If you want to use a single server, almost always the best one to use is
the one run by your ISP.  More ISPs run these than advertise the fact,
and they are almost always time.<isp> or time1.<isp>, time2.<ips> etc.

Note that time server addresses are normally resolved at start up.  The
latest reference implementations of ntpd will re-resolve pool servers
that stop responding, but I don't think that w32time has any specific
pool server support.

However, if you are radio amateur, and serious about time, you should be
using a local radio clock.  The NTP reference version supports this,
even on Windows, although you are likely to need a non-USB serial port
for best performance.  GPS receivers with pulse per second outputs are
available for a few tens of USD.
<http://www.satsignal.eu/ntp/NTP-on-Windows-serial-port.html>

Times accurate to single figure microseconds are possible on Linux, but
one should really expect Windows to do better than single figure
milliseconds.  (The figures in the article are likely to be for an
unloaded system and applications programmes can't normally read the time
to that high a resolution.  They are also really repeatability, rather
than absolute accuracy, measurements. You need an even more accurate
clock to measure those.)

The GPS L1 Coarse/Acquisition signal should be able to obtain time
transfer accuracies of around 50ns, so GPS itself is not the weak link.

--
David Woolley
Owner K2 06123

On 28/06/15 00:02, Lynn W. Taylor, WB6UUT wrote:

> The "pool" has a whole bunch of time servers, run by different
> organizations.  The people who run them can add them to the pool, or
> remove them from the pool when they're about to be shut down.
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Kevin Stover]

I use D4 as well.
It synch's on boot and every 15 minutes thereafter.
The longer you leave the computer on the more accurate the system clock.
I just checked and the last synch adjusted the system clock by .006
seconds. The computer rebooted three days ago.
That's  plenty good enough for me.


On 6/28/2015 2:35 AM, Edward R Cole wrote:

> I also use tick.nobs.navy.mil for several years (2003) with my xp32
> machine using D4 (mainly for JT65 on eme).
> I have a frequent sync rate so time is rarely off more than 0.020s.
> Dimension-4 is freeware and easy to setup.
>
> I tried some other NIST programs in the past returned to using D4.  
> Its my belief that it is used by very many eme'rs so not sure where
> the comment by GIMHU came from that represented "most eme'rs having
> switched away from D4".  I was never asked in any survey about what I
> am using.
>
> 73, Ed - KL7UW
> ---------------
> Myself, I use  tick.nobs.navy.mil with no problems at all.  It's at the
> US Naval Observatory and is one of the group used to determine NIST
> time.  My first engineering job was at the US Naval  Research Laboratory
> so I have a (misplaced ?) loyalty to NObs !  :)
>
> Happy Hamming.
>
> 73 de K2ASP - Phil Kane
> Elecraft K2/100   s/n 5402
>
>
> 73, Ed - KL7UW
> http://www.kl7uw.com
>     "Kits made by KL7UW"
> Dubus Mag business:
>     [hidden email]
>

--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Rick Commo-2]

Gary,

Is there any chance that perhaps your firewall might be blocking the traffic on that NTP port?  

This thought was triggered by the fact that all your computers were having problems.  From what I’ve found on Google doing a quick search that NTP can use port 123 (IMCP, which is also used by pPing), port 37 (but seems to be disfavored) and port 13.  See: http://tf.nist.gov/tf-cgi/servers.cgi

Cheers and hope you find the problem,
-rick, K7LOG


On Jun 27, 2015, at 8:24 PM, Gary Smith <[hidden email]> wrote:

Gentlemen,

I have today tried each and every one of your suggestions for a
"correct" server to sync and ever one of them has failed for me.

While I am truly happy these options work for you, they do not work
for this computer or any of the other computers I use.

The 3rd party software, however, does work without a hiccup on this
computer.

My only interest in my original posting of this was to provide
information to any of us who have difficulties in syncing their
computer to the correct time, so they will know a viable option to
deal with this problem.

I suspect this has been beaten to death and Eric will be soon telling
us to can it, so lets let it go at this point.

73,

Gary
KA1J

---
This email is free from viruses and malware because avast! Antivirus protection is active.
https://www.avast.com/antivirus

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[ac2ev]

I don't recall anyone mentioning it but I've had very good luck using Meinberg NTP on everything from XP to Windows 8.1.

73
Don AC2EV


> On Jun 28, 2015, at 18:00, [hidden email] wrote:
>
> Re: [Elecraft] OT setting your computer to NIST
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Michael Adams]

FWIW,  the one glitch I encountered when I joined the Win10 beta was that the user account I created for the Meinberg NTP service did not get transferred over from my Win81 install.

Hopefully this will be cleared up before Win10 goes live.



--
Michael Adams | [hidden email]


-------- Original message --------
From: Frontier ac2ev <[hidden email]>
Date: 2015/06/28 19:13 (GMT-05:00)
To: [hidden email]
Subject: Re: [Elecraft] OT setting your computer to NIST

I don't recall anyone mentioning it but I've had very good luck using Meinberg NTP on everything from XP to Windows 8.1.

73
Don AC2EV


> On Jun 28, 2015, at 18:00, [hidden email] wrote:
>
> Re: [Elecraft] OT setting your computer to NIST
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Jim Brown-10]

On Fri,6/26/2015 6:54 PM, Robin Moseley wrote:
> most EME stations

There are several good applications that do this. I've used NetTime for
several years. http://www.timesynctool.com/  It runs in the background,
can be set to sync at intervals that make sense for your PC.

BTW -- the accuracy of the clock in a computer is NOT a function of
battery condition, but rather the temperature in your shack and the
temperature stability of the clock. One of my computers needed a sync
every half hour to be good enough for WSJT modes, while others can go
for days. With NetTime, you can see the time correction applied at each
sync.

73, Jim K9YC
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Kevin Cozens-2]

On 15-06-27 02:00 PM, Harry Yingst wrote:
> I used a Raspberry Pi and made a NTP server to hook to my GPSDO
>
> I didn't really need one but I had the GPSDO with the NMEA and PPS output
> and a spare Raspberry Pi

I also have a GPSDO that provides NMEA data and PPS output. It makes sense
for one to provide data that can also be used when you need accurate time.
They can also make for extremely accurate frequency sources for Elecraft
radios that accept 10MHz reference signals from an external source.

--
Cheers!

Kevin.

http://www.ve3syb.ca/           |"Nerds make the shiny things that distract
Owner of Elecraft K2 #2172      | the mouth-breathers, and that's why we're
                                 | powerful!"
#include <disclaimer/favourite> |             --Chris Hardwick
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]