On 3/25/16 5:07 AM, Bob Camp wrote:
Hi
The reverse isolation issue is indeed one of the weaknesses of this setup. For
testing
OCXO’s isolation is not a big deal. A normal OCOX has very good output buffering
to give it the stability you are after. If you are running (maybe) a VCO with
no buffering, that
assumption falls apart. The VCO will / can injection lock through the mixer.
In that
case you *do* need an amp to provide enough isolation to prevent the injection
lock.
But if someone were building a little module for a cheap and cheerful
noise analyzer, then the buffer amp would be a separate module.
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