Bales, Tracy skrev: > I just started receiving the Time-Nuts emails...I admit that I've got a > lot of learning ahead of me. > > I've got a Trimble GPS module that outputs a 10 uSec wide pulse every > second. Now this is where I need some education... > > How would you use the 1 PPS output to steer a phase locked loop running > at 10MHZ? Are you dividing the 10MHZ clock by 10 million?
That is usually what is done. > If you are dividing by 10 million, wouldn't it take forever for the PLL > to lock? No, you get a fairly good idea about the initial frequency error in just the first seconds, using a PI-regulator is usually done. You can bootstrap it for a quicker lockup by raw-adjusting phase and possibly also frequency. > See, I gave everyone warning about my learning curve!!! Thanks... Many of your fellow new friends here have been there, so no big worries. If you look in the archives you will find this issue discussed over and over. You will also find links to several sites, include TvB. Do follow up on those links as there is usually lot of good info nearby. Cheers, Magnus _______________________________________________ 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.
