[time-nuts] Why do have OCXO a Vref output? (was: help reviving Trimble UCCM-LPS GPSDO)

[Attila Kinali]

On Thu, 23 Dec 2021 14:42:27 +0100
Wilko Bulte <wilko.bulte at xs4all.nl> 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