Al, I think the key question is are you otherwise getting satisfactory performance? Are you making Q's? This subject is starting to take on the tenor of the never ending quest for a 1:1 SWR. And as we used to like to say, "If the SWR is less than 10:1, call 'CQ'!"
John On Wed, Dec 5, 2018 at 10:04 PM Al Pawlowski <k6...@almont.com> wrote: > Only a few have posted what range of DT’s they mostly see when time.is > (or something else) says their PC clocks are right on the money. Mine is > consistently +0.35s. Do most peoples see something similar? > > If I slow my clock by 0.35s, while sync’d to gps and nist.time and time.is > says it is right on, I get lots of zero DT’s. I wonder if others then would > see me at about +0.7s when they are in sync to gps and/or some NTP server. > > Should I/we be hoping to see mostly fractional second +DT's (rather than > zero) for best operation? > > > Al Pawlowski, K6AVP > Los Osos, CA USA > > > On Dec 4, 2018, at 16:12, Al Pawlowski <k6...@almont.com> wrote: > > The time posts have prompted me to ask about what other user’s displayed > DT is when their PC clocks are exactly correct. > > I wonder because: > > 1) With the PC clock exactly correct, I would expect DT to be an > indication of latency. However, I do not see any change when I up the > priority of any user programs I have running - typically, MS Edge, WSJT-X, > JTAlert and PowerSDRmrx. Be interesting to see what some others are seeing. > My DT, is consistently about +0.35s, with the clock correct according to > time.is and NEMEAtime2 (my gps synchronizer), on my 2.2GHz i5/6GB RAM > laptop. > > 2) I set NEMEAtime2 to make (gps) -0.35s corrections for (mostly) zero > DT’s and both programs then show my PC running slower than actual (by the > correction amount). A positive DT therefore means the message is from a > user whose clock is slower than mine - not a problem for me, but seems > reverse logic. I wonder if I should add in, or subtract, another 0.1s for > the tx delay I have set. > > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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