> On 23 Dec 2021, at 18:47, 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.
Well, an external disciplining circuit might make good use of a oven stabilised reference, at least that is what I assume? Disciplining circuit uses Vref from the OCXO for a DAC that in turn drives the EFC of the OCXO. No doubt someone will correct me if that is a wrong assumption :-) > 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? Well, currently I have a 2.5V Vref externally connected. No smoke as of yet Wilko > > 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.
