[Elecraft] Remote Operating Time Sync

[M. George]

I should have mentioned that there is an obvious way to sync your clock for
JT mode operation... per the spec:

The JT65 protocol states that a transmission will begin at precisely 1
second into a new minute and end 46.811 seconds later.

So if you have no time source and if you can't hear WWV and you have no
internet... just sync up with the other signals you hear.  Get your clock
setting routine ready to roll for 1 second past the current minute and wait
for the beginning of a melee of signals / JT transmit cycle.  It might take
you a few tries, but you will be good to go.  It certainly doesn't need to
be perfect or in the millisecond time frame.  Use your ear and sync your
clock to one second past the current minute.

On another topic... for a couple years now I have hosted and run a Stratum
1 ntp time server (as many others around the globe have, this is nothing
new).  If you want to point to a dedicated stratum 1 NTP server that is GPS
synchronized (and runs in the low nano (yes it's in the low nano range)
second accuracy range), point your NTP configuration / Windows time sync
configuration to: time.nc7j.com  (via NTP over the internet, the best you
will do is usually mid micro second accuracy if you have a fairly low ping
time to the source... I'm in Syracuse Utah with my host IP out of Salt Lake
City for this ntp server)

You can see the status of my NTP server here: http://www.pool.ntp.org/
scores/time.nc7j.com

If you are in the US, you will get a much more accurate consistent sync
from time.nc7j.com than you would from other pooled sources.

Max NG7M

On Thu, Jun 15, 2017 at 12:59 PM, Matthew George <m.matthew.george at gmail.com
> wrote:

> Tune in to wwv and synchronize your clock.  The jt modes will be fine even
> if you are a second or two off.  Or get a gps and synch to the gps clock
> via nema.  Use google and search on all your options.  You could setup nptd
> on your mac and use a pps signal from a gps too.  Max Ng7m
>
> --
> Matthew George
> 801-560-8754
>
> > On Jun 15, 2017, at 12:46 PM, James Bennett <w6jhb at me.com> wrote:
> >
> > I have a MacBook Pro Retina Display running Sierra 10.12.5 that I use
> with my KX3 when operating portable. Part of my operating is done with
> WSJT-X, for JT65 and JT9 modes. This software is very time sync critical -
> the computer clock needs to be within +- one second accuracy. Here at home
> on my wireless network connected to our cable company, works great.
> >
> > However, a recent trip to the southern Philippines as DU8/W6JHB with
> this equipment was an eye-opener. I completely forgot that the laptop clock
> would not keep that sort of accuracy without having Internet access. I saw
> many signals, but WSJT-X decoded nothing at first. Luckily I realized what
> was happening and was able to access and connect to the WiFi network at the
> resort we were staying at. This connection provided the accuracy the
> software needed and all was good.
> >
> > But - when we return on our next "vacation" we may not have the luxury
> of a resort having WiFi for it's guests. So, I'm looking for some sort of
> device that I can use to keep the laptop clock accurate. Internet access
> would be a bonus, but of most importance is that internal clock.
> >
> > Any suggestions? By the way, a mega-buck device is pretty much out of
> the question. Just ask my wife... :-)
> >
> > 73, Jim
> >
> > Jim Bennett / W6JHB
> > Folsom, CA
> >
> >
> >
> >
> >
> >
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-- 
M. George