[Amps] Re: IMD

[Richard]

>Rich,
>
>How did you come up with 4.5 kc offset? I am assuming that you are using the
>receive filter on the same side band with that offset? With that setup I 
>would
>think that you would only see the products of the higher audio frequencies 
>and
>not the lower ones as they may not fall that far away. Wouldn't multiple tone
>IMD testing give a more accurate picture?
>
>Although I do agree that it gives a good snapshot of excess bandwidth. I do
>kind of the same thing but I just switch side bands on the receiver and note
>the difference. However a guy with lots of lows has more energy on the other
>side band. But it still is a good quick check of bandwidth.
>
€  agreed. One could use IF shift to make thing a bit more crispy to 
separate the IMD from the from the other sideband. 

-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
www.vcnet.com/measures.  
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