-------- In message <766d6811-f733-4ab2-8574-24e4606e4...@aol.com>, Said Jackson via tim e-nuts writes: >Thats exactly right Bob. > >By the time your ocxo jumps to catch up to the efc voltage, you >have oversteered, then the process starts in reverse and the ocxo >jumps in the opposite direction.
This is a well known PI effect called "windup". The cause is a phase offset of opposite sign of the frequency offset. The fix is simple: Start running with only the P term, and engage the I term only after 1. The input phase offset changes sign or 2a. The input phase offset levels off or 2b. Some calibrated amount of time has passed. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
