Right now I'm planning to use a DS1123 driven by the PIC in my system to provide sawtooth correction. The phase measurement is strictly binary with a D FF. The PIC reads the value once a second and integrates with a bit of feedforward for stability. The numerical result will be fed to a DAC which controls the OCXO. The DS1123 is about $14, not unreasonable. The same PIC is used to setup the M12+T and read the status and sawtooth info, do the math for the PI filter, drive the D/A and communicate optionally with a PC to log D/A commands and relay any M12+T communication. It will also maintain a few simple indicator lights for status.
Jim _______________________________________________ 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.
