Interesting subject :) 2010/3/7 m...@watty <[email protected]>: > > I had loan of test gear and used it to calibrate a 10MHz Oven crystal. > I fed both to X & Y inputs on a scope and set gain so as to have an > oval. When the oval is not rotating at all the frequency is the same. > If one is x2 the shape is stationary figure of eight. You can't do > this on most digital scopes. > I bought a 10 MHz vcxo on ebay and wait for it to arrive. I intend to lock it on the asynchrone output of a cheap GPS. I understand this is not the best methode, but I'd expect it to be pretty close and the correction voltage to be pretty informative on what happens...
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