> From: "Matt Ettus" <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] low-g OCXO GPSDO > Date: Thu, 5 Jun 2008 10:25:43 -0700 > Message-ID: <[EMAIL PROTECTED]> > > > > A "normal" OCXO would drift significantly when being turned > around in any > > > direction. > > > > I've actually been wondering about what physical mechanism that causes > > this. I could understand how it could cause a phase shift, but I > > can't envision the cause of frequency shift. Does anyone know? > > Anything that deforms the actual crystal will slightly change the > acoustical > waveequation and thus the frequency. Crystals also deforms due to > electrostatics, which have been used by NIST for finegrained > phase modulation.
I wonder what would happen to g-sensitivity if you ran the crystal with a DC bias across it. If you could pre-compress the crystal electrostatically, maybe it would become less sensitive to orientation. -- john, KE5FX _______________________________________________ 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.
