If they don't get close, which is right? If you only have 2 references, you cannot tell which is right.
Didier KO4BB Sent from my Droid Razr 4G LTE wireless tracker. -----Original Message----- From: li...@lazygranch.com To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Sun, 09 Dec 2012 4:04 PM Subject: Re: [time-nuts] Switching oscillators 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.