On 8/27/2012 11:45 PM, WB6BNQ wrote:
A microprocessor controlled XO is a non oven crystal oscillator system that has additional computational control providing a bit more than just mere passive temperature compensation. The additional computational capability deals with having coefficients of that particular oscillator's behavior pre coded to compensate for the nonlinear behavior over a given temperature rang
It doesn't use coefficients. It has a look up table of frequency vs temperature.
A microprocessor controlled XO system allows for using cheap crystals with minimum processing time and costs. Because of limited storage space there is no
No it doesn't use a cheap crystal. It uses a *special* SC cut crystal. This crystal could very easily cost more than an OCXO crystal.
way for the system to have enough data to even try to compete with the quality of a decent OCXO. Beyond its initial calibration setup, it has no way of keeping it tied to a known reference, like the Thunderbolt is doing. Bill....WB6BNQ
An MCXO is a very good, but expensive TCXO. Only temperature, not aging is corrected.
It has nothing to do with "smart clocks". Rick Karlquist N6RK _______________________________________________ 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.
