>>Although the Trimble oscillator has superb phase noise >>performance, it has TERRIBLE temperature sensitivity.
> It appears that most do but some don't. Between the results I have > seen posted on the list (Lady Heather screen shots) and my own data, > they seem to fall into two groups. I have two with excellent > oscillator tempcos, but a third unit I have is about 100x worse and > the sign of its tempco is reversed compared to the first two. That Mark, Charles, This is interesting and I'd like to pursue it. I still have a pile of original TAPR-Thunderbolts here so without too much effort I can gather tempco statistics for you. I tested the TAPR lots for phase noise and ADEV and DS1620 granularity, but did not test free-run tempco of the OCXO. <rant> Please don't use the word "TERRIBLE". It's relative to XO, TCXO, OCXO, DOCXO, etc. This is time-nuts, not some feel-good audiophile list. We are allowed to make objective experiments and use scientific notation. The units for tempco involve Hz and C, or dF/F per K, etc. Given that, do either of you have actual tempco numbers? </rant> Bob, do you have experience or an explanation for the bi-model tempco grouping that they have observed? Thanks, /tvb _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
