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index notch filtering

index notch filtering

index notch filtering

(OP)
I have strong frequency-periodic noise in my measurement system.  Is there a indexed notch filter where frequency content is filtered at multiples of a primary mode?  [e.g. 100 hz, 200h z, 300 hz,.....]

I'd be interested in the math form of such a filter exists or a solution in either MathCAD, LabVIEW, or Excel...

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