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
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