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To: <>
Subject: [AMPS] IMD
From: (Tom Rauch)
Date: Tue, 18 Sep 2001 10:28:40 -0400

> What kind of measurement setup you would recommend?
> And should (and could!) ARRL also implement that in
> their laboratory?

A three tone test, where two normally spaced tones are measured 
and modulated by a variation at a non-coherent syllabic rate, would 
be best.

Remember the supplies are very much stabilized at frequencies 
over a few dozen Hz by the capacitors that remove ripple, while the 
voice will move them  around at a much slower rate.  

73, Tom W8JI 

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