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How to display Bathtub Curve for a simulate sine wave?

I cant find the VI whcih has this function, please show me ,thx

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Message 1 of 7
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There isn't one, but that doesn't mean you can't create the curve yourself and add it to the graph. See, for example, http://en.wikipedia.org/wiki/Bathtub_curve

Message 2 of 7
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So except for Bathtub curve, is there any ways that can confirm the signals that i got from CompactDAQ is pure waveform?

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Message 3 of 7
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I'm sorry, but I don't understand your question. What do you mean by confirming it's a "pure" waveform. Please define "pure waveform". What exactly are you trying to determine? The CompactDAQ module you have will have specifications on its accuracy and resolution, so it will never be a "pure waveform" (at least based on my definition of "pure waveform"). It will always be a representation of it.

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Message 4 of 7
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hi, my "pure" waveform means that sine waveform without harmonics or distortion, so u got my meaning?

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Message 5 of 7
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Have you tried just doing an FFT of the signal?

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Message 6 of 7
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Yes, i did, are there any solution else?

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Message 7 of 7
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