Time-Nuts,

I recently fired up an Efratum LPRO and have been watching the slowly rotating 
Lissajou figure produced when comparing it's output with that of a GPSDO on a 
scope. It's a 
beautiful thing (the weather is too cool to watch paint dry...)  

I thought the period of "rotation" of the Lissajou figure could be used to 
determine the frequency difference of the two oscillators, but the math escapes 
me.

Is it as simple as calculating the inverse of the period of the "rotation"
through 360 degrees? 

In this case the period between in-phase and in-phase is 182 seconds yielding a 
rotation frequency of 5.5 mHz.  So, is 5.5 mHz the frequency difference between 
the two 10 MHz 
oscillators? Or am I missing something obvious?

Thanks, in advance,

Mark



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