Yo Hal! On Tue, 10 May 2016 15:58:30 -0700 Hal Murray <hmur...@megapathdsl.net> wrote:
> Real serial ports on a PC include that sort of chip. Nobody worries > about the delay through it. The delay is fixed. You could look on the data sheet, find the propogation time, and fudge it out. Here is the MAX232 data sheet: http://www.ti.com/lit/ds/symlink/max232.pdf The prop delay is 500 nanoSec. Almost, but not quite, in the noise floor of the best time servers.. If you have a PTP server you can compare that to your PPS, and just add a fudge to remmove it. If that 500 nanoSec realy matters to you, then no software solution is right solution. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 g...@rellim.com Tel:+1 541 382 8588
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