Jerry, thanks; it was enough to point out that I really hadn't missed some piece of information. I understand what you pointed out although I hadn't followed it through as thoroughly as you. You were hearing my frustration of not being able to follow the statement verbatim.
Now retired, I've been re-engaging with RF electronics, which was a childhood fantasy. So I've been looking for tutorials on any number of subjects, like the Smith chart (as a refresher), and Python (about which I know less than zero, and lack any programming knowledge).
I observe a common denominator: the one skilled in a subject forgets how much they already know that will be required of the listener to understand their explanation. And I can't throw stones!! I now know I must have done the same thing explaining some aspect of propagation in optical fiber, and saw the listener's eyes glaze over!
-Paul
I_B_Nbridgema
Nbridgema