>
>> If I can measure the baseline (the exciter) first, the additional IMD
>> generated in the amp shows up as an increase from that baseline.
>> Subtract the baseline and I have a number that represents the amps
>> distortion.
>
>Distortion is phase coherent. Because of phase and level
>differences through a system where each stage adds distortion,
>distortion can add, subtract or do anything in between. Measuring
>white noise is much different than measuring distortion.
>
>This is the same mistake an amplifier manufacturer made when he
>said he was going to patent an input circuit that "cleaned up
>exciters". He used a broadband toroid, which added distortion that
>just happened by dumb luck to correct distortion from the exciter
>he was using. Put it on a different exciter, and it could just as
>easily add IM distortion!
>... ... ...
// Which manufacturer invented the exciter cleaner upper? Was a patent
granted?
tnx, Mr. Rauch
- R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.
end
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