On Wed, 23 Jan 2019 17:31:04 -0500 Bob kb8tq <kb...@n1k.org> wrote: > If you take a look at typical TCXO’s and XO’s in a real world environment, > their noise is higher than a similar > OCXO even at 100 Hz. If you are cleaning up something like a Rb, your loop > may well be below 1Hz.
I always assumed, this is because they use cheaper resonators, with lower Q for the XO and TCXO than for the OCXO. E.g. most HC-49 case AT-cut crystals are in an (inert) gas at approximately 1bar pressure. My guess would be, if the same crystals would be used, the phase noise levels should be comparable down to 100Hz at least, maybe even 10Hz. If my guess is wrong, what would be the reason? 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, Neal Stephenson _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.