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Re: [Amps] Checking for IMD

To: "Jim Tonne" <tonne@comcast.net>, <amps@contesting.com>
Subject: Re: [Amps] Checking for IMD
From: "Tom W8JI" <w8ji@w8ji.com>
Date: Fri, 11 Aug 2006 17:08:25 -0400
List-post: <mailto:amps@contesting.com>
> Very true!  And if the separation between tones is down 
> below, say, 100 Hz, then the power supply regulation (or 
> lack of same) starts to enter into the picture.  To test 
> the RF
> block alone be sure to use separation of at least 1 kHz.
> But to test the entire system we have the dilemma of how
> to simulate voice.

That would require syllabic variations along with two tones.
It isn't difficult to do that.

> How pure does each tone of a tone pair have to be to
> check IMD using a two-tone test?

 Do you mean for hum and noise?

73 Tom 


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