That sounds odd, as most radios take tens of millisecond, if not hundreds to switch from transmit to receive and back in any mode other than break-in CW.
Further JT65 is used with propagation modes that typically do not have a stable or predictable propagation time like moonbounce or meteor scatter, so I don't understand why mS timing would be necessary? I must be missing something. Didier KO4BB Didier Sent from my Droid Razr 4G LTE wireless tracker. -----Original Message----- From: David Kirkby <david.kir...@onetel.net> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wed, 07 Nov 2012 5:47 PM Subject: Re: [time-nuts] Is it sensible to update every few seconds from NTP server? On 7 November 2012 23:28, <bjon...@mindspring.com> wrote: > We had a presentation at our radio club several months ago on digital HF > modes, and part of the presentation was on JT65 and apparently it needs > a precise synchronized time fix on both ends for an exchange to occur. > I do not recollect all of the details that were presented, but they did > say that the default windows time keeper is not accurate enough, and > advocated installing a third party ntp client that updates (way too) > frequently. > > -Brian I think it might be JT65 he is using. I know he said that if your time was accurate to 1 ms, and someone elses 2 ms, you have a higher chance of making the QSO. Hence there is a need for accurate timing. (I'm not sure he said those exact figures of 1 and 2 ms, but the general point was that it needed to be accuate, and increased accuracy gave a higher chance of making the QSO). But the whole idea of getting time from an internet time server every few seconds seemed odd to me. He is not using any local time server. I'll try to find out what mode he is using, and what software to correct his time. Dave _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
