[email protected] said: > One interesting subtlety making something like this: > What if the two inputs arenât quite on the same frequency? Purely as an > example, say they are 1 Hz off from each other. If you have 60 db of > isolation in your âswitchâ you get a 1 Hz offset spur that is 60 db down. > Even something much further down is plenty to mess up the ADEV of the > output.
Has anybody built a microprocessor controlled PLL to handle this case? If you have the microprocessor and DAC, watching a second input and switching in software doesn't seem like a big step. --------- Can I put two switches in series? The is-it-working logic has to be look before the first switch, but the first switch is on-off rather than A-B. It can be in a separate package placed to minimize feed-through. -- These are my opinions. I hate spam.
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