The NTP software has a clock mode that will decode an audio stream from WWV and
use it as a time source. But, I recall that it takes quite a while for it to
sync up and start providing time. All of the various reference clock modes are
described here: https://www.eecis.udel.edu/~mills/ntp/html/refclock.html
In my remote WSJT-X setups (I’ve done 20 or so), I use a Raspberry Pi to run
the NTP system, and I set up the Pi to use its hardware clock as a time source,
then send it out to my little LAN in which the PC runs. I run Meinberg on the
PC (Thanks Ria!). It is easy to set the system time on the PI by hand using
WWV as a source.
But there are better solutions using a PI and a GPS receiver. I think I’ll do
it over using the GPS dongle idea. The key is the Meinberg NTP implementation
for Windows. This software gives you access to all of the NTP knobs in a
package that is well supported and fully integrated to Windows.
Dave / NX6D
________________________________
From: Ria Jairam <rjai...@gmail.com>
Sent: Saturday, November 11, 2017 8:32:36 AM
To: WSJT software development
Subject: Re: [wsjt-devel] DXPedition System Clock Sync
That is an excellent idea.
A clock sync feature using WWV, WWVB, JJY, YVTO, CHU, DCF etc would
help those who don't have the ability to sync clock over the Internet.
73
Ria, N2RJ
On Sat, Nov 11, 2017 at 11:23 AM, Scott Bidstrup <sc...@bidstrup.com> wrote:
> On 11/11/2017 09:26 a.m., Bill Shell N6WS wrote:
>>
>> Hello,
>>
>> While using FT8 in a DXPedition setting, there may be conditions where
>> there is no reliable timing source for syncing of the system clock.
>
>
> Bill,
>
> When my Internet here in Costa Rica has been down, I've been able to sync my
> system clock adequately closely by using WWV and using the Windows clock set
> feature to set the clock, by simply setting to the next minute and then
> clicking the Apply button as the time comes around to zero seconds. After
> doing it a few times, you can nearly always get the hang of it and get it
> within a second or so. Close enough that I've gotten by. It's a nuisance
> and takes a bit of practice, but it can be done in a pinch. And it's gotten
> me back on the air many times.
>
> Per your request, though, I envision a clock set feature whereby you would
> set the receiver to zero-beat WWV, and call a special clock set routine that
> would look for the top-of-the-minute tone at the right audio frequency and
> at approximately the top of the minute. When it sees the tone appear at the
> right frequency, and at about the right time, it sets the system clock
> accordingly. In my professional work, before the advent of the Internet, I
> used hardware clocks based on such a system, and they seem to have worked
> reasonably well most (though not all) of the time.
>
> That would only work, however, in parts of the world where WWV is available.
> When I lived in Africa many years ago, however, WWV was rarely audible, but
> there was a different time signal that I could hear, a digital signal of
> some sort, and I have no idea where it originated from (EU maybe?) or what
> the protocol was. Something that uses that or other protocols might be
> useful in those regions.
>
> Scott Bidstrup
> TI3/W7RI
>
>
>
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