On Thu, 24 Nov 2016 08:16:08 -0500 Bob Camp <kb...@n1k.org> wrote: > If you take the bad aging (out of spec) parts out of the pile, those are the > ones > with the best fit. They have very pretty curves and they stick to those curves > for a *long* time. They have a single dominant cause for their aging ( = the > defect). > The rest of the parts have all of the causes bashed down by the process so > that > over a 20 or 30 year span, there probably is no single dominant cause.
Then the question becomes: What would be a good fitting function for the typical application of an OCXO that is regularly measured with not too long time spans (e.g. GPSDO)? From the discussion it seems that a second or third order Taylor would be sufficient to capture aging for a span of 10-100 days. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.