Brian, that’s very helpful. Thank you!
Dave
KD2JIP
From: Brian Moran
Sent: Thursday, December 7, 2017 10:55 PM
To: WSJT software development
Subject: Re: [wsjt-devel] DXPedition System Clock Sync
So, back to the practical matter of getting the time right faced with lack of
WWV/WWVH, no GPS NMEA sentences to plunder, no superlative chronometer to
reference.
Here's something that you can try --- turn off time sync on your computer. Stop
any WSJTX app you have running. Go into control panel, or use a adminified
command prompt to get ready to set your computer time to some minute or 0:30
boundary (the HOURS and MINUTES DON'T MATTER). Listen to the WSJTX frequency,
and when you hear everyone start transmitting, set your time to the 00 or 30.
Does decode still work for you?
My hands-on investigation yielded that decodes worked when:
- I was ABOUT 2 minutes fast on my PC clock.
- I was ABOUT 3:15 fast on my PC clock.
- I was ABOUT 3:30 minutes fast on my PC clock
(don't forget to stop and restart WSJTX each time you change the time)
Empirically, it appears that the time sync is important so you're able to hear
most of the beginning of 15 second transmission interval. However you do it.
-Brian N9ADG
On Thu, Dec 7, 2017 at 6:21 PM, Dave Corsello <kd2...@gmail.com> wrote:
You’re right. In that regard, depending on the circumstances, digital modes
might not be ideal, especially because the transmissions can be long.
Dave
KD2JIP
From: Ria Jairam
Sent: Thursday, December 7, 2017 8:41 PM
To: WSJT software development
Subject: Re: [wsjt-devel] DXPedition System Clock Sync
I would stay off the air. No need to alert people to where supplies are!
Ria, N2RJ
On Thu, Dec 7, 2017 at 8:30 PM, Gary McDuffie <mcduf...@ag0n.net> wrote:
>
>
>> On Dec 7, 2017, at 1:55 PM, Dave Corsello <kd2...@gmail.com> wrote:
>>
>> Given the current state of geo-politics, I think the probability of GPS
>> being knocked out by EMP is greater than zero. So I thought it was
>> worthwhile to continue the discussion.
>
> If that were to happen, you wouldn’t likely be on the air for multiple
> reasons!
>
> Gary
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