On Wed, Nov 1, 2017 at 7:21 PM, MLewis <[email protected]> wrote: > > And the DS3231 has: > - a 32K output, and > - an Active-Low-Interrupt/SQW output that can be set to PPS. > It's unclear to me how to sync the DS3231 PPS to the GPS PPS, or if that > can be done. > > > The DS3231 has an 8 bit register that will change its frequency in increments of about 0.1ppm. Thus you could discipline it to get its pps aligned with your reference.
With an adjustment range of +/- 127, that's a maximum offset of 12.7 ppm. In the worst case you would have to move its pps 0.5 sec, which by my calculation would take about 41.667 seconds or about 11.5 hours. -- --Jim Harman _______________________________________________ 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.
