Re: Repeating "GPSD: Location fix is now 2D/3D"
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WSPR needs to be timed within the window. Many microcontroller based WSPR (and some other modes) transmitters use the PPS to time the TX because microcontroller crystals won't keep accurate enough time when run over long periods of time.?
Also, since the WSPR TX frequency window is only 200 Hz wide (per band), many use the PPS to correct the frequency to keep in within the window over varying operating conditions (in place of a TCXO).?
On Wednesday, October 6, 2021, 10:40:50 PM EDT, David Ranch <direwolf-groupsio@...> wrote:
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I completely disagree, there are all sorts of
things that need that precision in ham radio, Voting and
simulcast to name a couple.
Ok.. you got me there.. simulcasting and accurate voting repeater
systems really do need precision clocks but I would argue they only
need accurate time amoungst eachother.? I don't know if they really
need to be aligned to the world clock.? Anyway.
--David
KI6ZHD
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