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When I do all my modulation testing I direct inject the signal to the mic jack, rather than using an audio tone thru a mic. That way you can't "corrupt" the tone. I also sweep it from 500hz to 4khz to see if there's any major changes in the harmonics on the spectrum analyzer.

~Cheers~

[QUOTE="ExitThirteen, post: 576126, member: 6878"] When I do all my modulation testing I direct inject the signal to the mic jack, rather than using an audio tone thru a mic. That way you can't "corrupt" the tone. I also sweep it from 500hz to 4khz to see if there's any major changes in the harmonics on the spectrum analyzer. ~Cheers~ [/QUOTE]

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