Hi! Those interested in micro-steppers might want to look at the Symmetricom AOG-110 manual. They have a local 5 MHz OCXO locked through a interesting gear with the incomming 5 MHz and a DDS to result in a 10 kHz comparision frequency for the phase detector in the loop. The gear acheives a 512000 increase in gain (1024 from gear-works as such and 500 from the ratio of 5 MHz and 10 kHz). To acheive the 1E-19 stepsize it then takes the DDS a few bits, but what is 56 bits among friends? Since we don't need to waste too much on this, there is a 8 bit CPU processing it all in there and it uses a 56 bit fixed point format.
I'd naturally love a few comments on that one. Cheers, Magnus _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
