Hi Even when dividing from 48 MHz straight to 60 KHz, the uBlox is going to do a pulse drop / pulse add to keep things on frequency. For a wall clock that probably is not an issue. For a phase locking receiver it’s not quite as clear. The 60 KHz edge is going to hop by about 21 ns every so often. If the TCXO is running at ~0.1 ppm high or low, it’ll do it around 5 times a second. If the newer parts run both edges or a higher counter drive frequency, you would get more steps per second, but smaller steps.
Bob > On Aug 29, 2018, at 3:42 PM, Mark Sims <hol...@hotmail.com> wrote: > > The Ublox 7 has two programmable "timepulse" outputs. The default freqs are > (I think) 1 PPS and 10 MHz. I don't remember if the Ublox 6 has one or two > outputs... also some of the earlier Ublox receivers have limits on the range > you can set the output(s) to (like 1 kHz). Lady Heather can program the > outputs (start up with /rxu to force Ublox binary mode). The pulse output > control commands are in the "P" menu. > > You may have to bodge a wire onto the Ublox module to get access to > timepulse2 on those cheap Ublox7 boards. I bought a couple that brought TP2 > out to a pad. > > -------------- > >> Mark I looked at the 7 and the pulse out wasn't obvious > _______________________________________________ > 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.
