All Rb's have XO's and with the exception of the HP5065C all Rb's influence long term stability only the only exception is the HP which uses a TC below 0.1.sec, and as Corbe demonstrated ADEV is controlled below 1 sec. by the cell. The same can not be said with other Rb's. Bert Kehren In a message dated 3/28/2014 7:33:45 A.M. Eastern Daylight Time, li...@rtty.us writes:
Hi Crystals are susceptible to vibration. That’s pretty well documented. They have resonances in the mount structure. They have a 2G tip sensitivity. Audio when it “impacts” an oscillator induces vibration. If your noise source is a rocket engine, then the vibration is “non trivial”. You do indeed see phase noise on the oscillator from audio … Bob On Mar 27, 2014, at 11:42 PM, Tom Van Baak <t...@leapsecond.com> wrote: >> More seriously, I'm assuming you're advocating rock for the thermal mass >> and/or mechanical. What about a 100 pound box of sand? > > Mechanical. I figured a OCXO might be susceptible to microphonics, especially in a recording studio. But if it's down to the level of 1 lsb of the digital sampling, then no worries. > > Has anyone on the list ever measured this effect, even on a cheap crystal? > > /tvb > > _______________________________________________ > 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. _______________________________________________ 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. _______________________________________________ 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.