[time-nuts] Switching oscillators

Bob Camp lists at rtty.us
Sun Dec 9 22:16:39 UTC 2012


Two basic choices:

1) Convert them both to logic levels and use a gate.
2) Use a relay. 

Both would need some sort of timer to drive them. Both would disrupt the instrument when the switch took place. I know of no "cheap / easy" ways to take care of the switching glitch. There are fancy / expensive ways.


On Dec 9, 2012, at 4:12 PM, Joseph Gray <jgray at zianet.com> wrote:

> 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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