[Amps] Checking for IMD

[Tom W8JI]

> 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