I've always assumed this is because they need to know the reference is clean and under the OCXO manufacturer's control if it's to meet specs. If the user had to supply the reference there's no knowing how clean it is.
Andy www.g4jnt.com On Thu, 23 Dec 2021 at 17:47, Attila Kinali <[email protected]> wrote: > On Thu, 23 Dec 2021 14:42:27 +0100 > Wilko Bulte <[email protected]> wrote: > > > A quick experiment learned that the OCXO freq responds to the EFC > voltage. > > So, looks like the Vref circuit in the OCXO has died. > > A stupid side question: Why do have OCXO a Vref output in the > first place? > > I can see that some form of reference might make stabilizing > the power in the crystal easier, but that still wouldn't make > it necessary to have an actual reference output. > > And related to that: Would supplying the voltage reference > externally, in case of a broken Vref output, work for whatever > is inside that needs this reference voltage? > > Attila Kinali > > -- > The driving force behind research is the question: "Why?" > There are things we don't understand and things we always > wonder about. And that's why we do research. > -- Kobayashi Makoto > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send > an email to [email protected] > To unsubscribe, go to and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
