My first thought is to simply wait a fixed time until the OCXO has warmed up and then switch over. I thought that others here might suggest a better method.
Joe Gray W5JG On Sun, Dec 9, 2012 at 3:04 PM, <li...@lazygranch.com> wrote: > You would probably want to see when the external oscillator frequency is > close to the internal oscillator. I suppose than could be done with a mixer > and glue circuitry. I don't think this is cheap though. > > > -----Original Message----- > From: Joseph Gray <jg...@zianet.com> > Sender: time-nuts-boun...@febo.com > Date: Sun, 9 Dec 2012 14:12:51 > To: Discussion of precise time and frequency measurement<time-nuts@febo.com> > Reply-To: Discussion of precise time and frequency measurement > <time-nuts@febo.com> > Subject: [time-nuts] Switching oscillators > > I have a device that has an internal TCXO. I want to feed it with an > external OCXO, but I don't want to completely replace the TCXO. > > Here is the scenario. On initial power on, or after a power loss, I > want the internal TCXO to be used. Once the OCXO is up, I want to > switch to it. How could this be done easily and cheaply? > > Joe Gray > W5JG > > _______________________________________________ > 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.