locked Re: Missing decodes #AudioIssues


Tim Dawson
 

ntpd (which Meinberg is also a compile of) is designed to compensate for propagation delay. It queries the time server, listens for the reply, and can deduce the transit time pretty well, so that should not be a problem *IF* the Mac is using a proper ntp distribution, and not some cut down sntp kludge.

On October 7, 2022 9:40:16 PM CDT, "Robert Rose via groups.io" <robert.rose@...> wrote:
Just for completeness, I note that I was using using Meinberg on my Mac, and the time differential was 2.1 to 2.3 seconds. I switched to an Apple server in Cupertino (I am in San Diego) and the difference dropped to 0.1 seconds.

I believe the WSJT-X User Guide recommends that you use the closest time server. It takes 0.13 seconds for light to circumnavigate the earth. Add in time for hops and switches, and this sounds like good advice.

73
Bob KN6UXD
On Oct 7, 2022, at 2:46 PM, Phil Cooper via groups.io <pcooper@...> wrote:

´╗┐Hi to Alan, Brian and Kari,

That is very interesting! I changed the time update period earlier, and that did seem to make a difference. I think I went from 1 minute to 5 minutes, and noticed it didn't drop as much. I will change that to 30 minutes over the weekend, and see whether that improves things.

As for Meinburg vs Dimension4, well, that seems to be one of those things. I know many folk that run D4 happily, and hate Meinburg, and also vice versa, so I will stick with D4 for now.

Thanks for the tips, all much appreciated. I will keep an eye on things, and see what happens.

Very 73

Phil GU0SUP

-----Original Message-----
From: main@WSJTX.groups.io [mailto:main@WSJTX.groups.io] On Behalf Of Alan G4ZFQ
Sent: 07 October 2022 17:17
To: main@WSJTX.groups.io
Subject: Re: [WSJTX] Missing decodes #AudioIssues

On 07/10/2022 15:59, Phil Cooper via groups.io wrote:
is updated every minute. Maybe that is too often?
Phil,

Definitely.
Use far less than that, maybe several hours or more unless your PC clock
is broken.

In fact the proper NTP of Meinberg is recommended.

73 Alan G4ZFQ













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