[time-nuts] Symmetricom ET-6000 TCXO receivers

[Bob Camp]

Hi

You are correct in your observation that the short term stability of a TCXO *does* impact GPSDO performance.  An OCXO 
(once it has warmed up and stabilized) will do better than a TCXO.

Because of the higher sensitivity of a TCXO on the EFC, there will be some change to the firmware when going from a TCXO
to an OCXO. Can you get things done? Maybe….

There are a number of OCXO GPSDO’s out there these days. The “low cost” ones seem to be in the ~$40 range. It’s cheaper 
to get one of them than to do crazy things to a TCXO based unit. 

Bob

> On Apr 17, 2016, at 4:04 PM, Erik Thomassen via time-nuts <time-nuts at febo.com> wrote:
> 
> Good evening  group !
> I am in the fortunate situation to have "inherited" two Symmetricom ET6000-TCXO receivers. Seemingly  fine receivers but i do not like the way they "drift" plus /minus. They never seem to settle, even free-running OCXO's seems to be far better over short time. 
> Yes, I know that this is the rule - but when compared with a new Meinberg GPSDO unit (replacing the ET6000) the -6000 "never" settles.
> 
> I am in the firm beleif that a change from a cheap TCXO to a "reasonable" OCXO of any make will at least stabilize the 10MHz output by a decade or more.
> 
> I do have the user manual but: I do not feel confortable exhanging the original TCXO with a OCXO of any higher accuracy/stability, non original component just like that... 
> 
> Any suggestions for making a reasonably good receiver even better by simple and cheap means? Any service manual/info deeper than the user manual?
> Kind regards from NorwayErik
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