Hi Would not “absolute” timing be referenced to UTC? (or something similar)
Bob > On Feb 26, 2021, at 5:37 PM, ed breya <e...@telight.com> wrote: > > John, if you look back at the recent GPSDO discussion initiated by "dandober" > in hpaligent keysight group, you'll see a post by Leo Bodnar, linking a Ublox > model here > > https://www.u-blox.com/sites/default/files/products/documents/LEA-M8F_DataSheet_%28UBX-14001772%29.pdf > > I looked it up, and I recall the PPS timing spec is +/- 5 nSec. After I > studied it some, I replied back > > "Thanks Leo, that's a great example of what I've been picturing. This is from > the data sheet, regarding the PPS output: > > "After an initial phase of acquisition the time-pulse becomes essentially > jitter-free, generated coherently from the built-in reference oscillator and > guaranteeing an exact number of reference frequency cycles between each > time-pulse." > > It looks like this is an implementation of what we've talked about here > before a few times, for saw-tooth error reduction. BTW I didn't call it > "1PPS" above, because it can be programmed for different rates - I don't > recall what they are. > > BTW, did dandober ever sign up here? > > Ed > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
