[Elecraft] Clock sync

Wed Jun 1 11:20:11 EDT 2011

Matt,

Thanks for the info , I will try that on
my EME setup.

73 Ken K5DNL
-----------------------------------------------------------------

--- On Wed, 6/1/11, Matt Zilmer <mzilmer at verizon.net> wrote:

> From: Matt Zilmer <mzilmer at verizon.net>
> Subject: Re: [Elecraft] Clock sync
> To: "Jon K Hellan" <hellan at acm.org>
> Cc: elecraft at mailman.qth.net
> Date: Wednesday, June 1, 2011, 10:01 AM
> I was using NetTime up until last
> year.  Works fine, is free, etc.
> 
> Another way to sync time works well if you use the K3EXREF
> and have a
> GPS-DO running.  Using Lady Heather (check out the
> icon), you can run
> command line options at start up.  One of the cmd line
> options is /ts,
> which sets the Windoze clock to be the same time as the GPS
> receiver
> (with some amount of software overhead, of course). 
> This is good down
> to a few mS, at least as observed here.  And you can
> set the program
> up to run at start-up time, plus sync periodically with the
> same cmd
> line option.  I have mine set to sync hourly, which is
> probably  good
> enough for us common folks...
> 
> That second approach isn't for everyone, obviously, but it
> works
> reliably and performs consistently.  OTOH, it's only
> good if you have
> the hardware in place so it's not great for portable or
> away-from-the-shack ops.
> 
> The Win32 program, "Lady Heather's Disciplined Oscillator
> Control
> Program" can be found at www.ke5fx.com.  This program
> is designed for
> the Trimble Thunderbolt GPS-DO, which is readily available
> in
> aftermarket and salvage over various web sites (eBay for
> example), and
> its price ranges from $40 to $150 per unit.  Low
> bidders seem to be
> doing well - there are a lot of these retired E911 units
> out there.
> 
> 73,
> matt W6NIA
> 
> On Wed, 01 Jun 2011 15:59:14 +0200, you wrote:
> 
> >On 06/01/2011 03:23 PM, Joe Subich, W4TV wrote:
> >>
> >>> I think XP has this capability also and likely
> Vista as well but it's
> >>> been along time since I left XP for Win 7 and
> have not looked back.
> >>
> >> All 32/64 bit versions of Windows have the ability
> to sync to "Internet
> >> Time."  However, they only sync once a week
> and do not retry in the
> >> event of failure or if the computer is off,
> sleeping or hibernating
> >> when it is time to sync.  Changing the
> frequency of synchronization
> >> requires registry editing and is not recommended
> of users who do not
> >> understand the risks.
> >
> >I use Meinberg's Windows implementation of NTP:
> >http://www.meinberg.de/english/sw/ntp.htm. It runs on
> Windows XP through 
> >7, as well as NT and 2000.
> >
> >NTP - Network Time Protocol - is an internet protocol
> for synchronizing 
> >time. Almost all servers on the internet use it. It
> isn't at all hard to 
> >set up. Windows 7 isn't optimal for time
> synchronization, and neither is 
> >consumer internet, but you should be able to keep
> within 100 ms of 
> >correct time. Linux or BSD over a well provisioned
> network easily does 
> >better than 10 ms. Connect a GPS with Pulse per Second
> (PPS) output, and 
> >you're in the low microseconds.
> >
> >73
> >Jon LA4RT
> >
> >> 73,
> >>
> >>      ... Joe, W4TV
> >>
> >>
> >> On 6/1/2011 9:06 AM, Bob Naumann wrote:
> >>> Windows 7 has the ability to sync itself using
> "Internet Time" so you don't
> >>> need any additional software to do this.
> >>>
> >>> I think XP has this capability also and likely
> Vista as well but it's been a
> >>> long time since I left XP for Win 7 and have
> not looked back.
> >>>
> >>> 73,
> >>>
> >>> Bob W5OV
> >>>
> >>> -----Original Message-----
> >>> From: elecraft-bounces at mailman.qth.net
> >>> [mailto:elecraft-bounces at mailman.qth.net]
> On Behalf Of Don Wilhelm
> >>> Sent: Wednesday, June 01, 2011 8:02 AM
> >>> To: Rich - K1HTV
> >>> Cc: elecraft at mailman.qth.net
> >>> Subject: [Elecraft] Clock sync
> >>>
> >>>     Rich and all,
> >>>
> >>> D4 does not state that it runs on Win7 or
> Vista.  You might try the
> >>> freeware Atomic Clock Sync from
> >>> http://www.worldtimeserver.com/atomic-clock/ as an
> alternative.  Version
> >>> 3.0 runs on Win 2K, XP, Vista or Win7 (but not
> 64 bit).  The older
> >>> version runs on earlier versions of Windows.
> >>>
> >>> 73,
> >>> Don W3FPR
> >>>
> >>> On 6/1/2011 8:43 AM, Rich - K1HTV wrote:
> >>>> Don,
> >>>>       Do you run
> software to keep you PC clock in sync with UTC? If not, you
> >>> won't
> >>>> have much if any success making JT65A
> contacts. I use Dimension 4, and
> >>> have set
> >>>> it to sync my PC clock every 5 minutes. D4
> is a free download and works
> >>> well. Do
> >>>> you use JT65HF software or the original
> WSJT software by K1JT for JT65A?
> >>> I find
> >>>> the JT65HF software by W6CQZ to be much
> easier to use. Is your transmitter
> >>>> stable? Too much drift and you won't be
> copied.
> >>>>
> >>>
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