Richard, One more thing, maybe I missed this earlier in the thread, but can you really call it "sawtooth correction" when you apply a receiver reported correction (with 1 ns granularity) to a 1PPS signal (with 9 ns RMS or +/- 15 p-p jitter) as coarsely measured by a 100 MHz TIC (with 10 ns resolution)?
I haven't done the math, but it seems like it's at least an order of magnitude less precise of a correction than the normal case where one makes ns or sub-ns measurements and then applies a ns-resolution correction in software. This is what both Tac32 (for Oncore) and Tboltmon (for Thunderbolt) do when you use one serial port for the GPS receiver and another serial port for a 53131/2 time interval counter. It just seems the small ns-level corrections from your receiver get rather lost in the large 10 ns resolution of your TIC. More like a staircase than a sawtooth, perhaps? /tvb _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
