[Elecraft] Clock sync

[Matt Zilmer]

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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