Hi Temperature transients are not a good thing for an OCXO. If you deliberately use the fan to create a transient, then yes the OCXO will not be happy. The question it - what happens after the transient has settled out? The plot you have still looks a lot like a step function.
Bob On Dec 19, 2012, at 9:28 PM, [email protected] wrote: > Bob, > > I did the test with my 53132A as a fan blowing on the 10811 after removing > the shielding and letting it stabilize first. The rate of flow from the > counter is actually not very strong, but the effects are massive. > > Attached are the results, and they speak for themselves. There is an ADEV > plot with the unit inside the foil insulation without airflow showing a > very nice 1E-012 to 2E-012 stability all the way up to 100s, then the ADEV > with airflow on the unit, as well as 10 minutes worth of frequency plot > while > inside the airflow. The ADEV is about 10x worse at around 100s and pretty > much goes straight up at intervals greater than 2 seconds. > > This result is in line with our DOCXO oven tests we had done some years > ago. QED. > > bye, > Said > > > > > In a message dated 12/19/2012 16:48:44 Pacific Standard Time, [email protected] > writes: > > Hi > > Ok, what happens if you keep the air gun in the exact same position and > let it stabilize for an hour with no insulation around the OCXO ? > > Bob > > <temp.zip>_______________________________________________ > 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. _______________________________________________ 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.
