12-14-2010 06:55 AM - edited 12-14-2010 07:03 AM
Refer attached vi, I input a array of 0.38 values into the build waveform function, and dt value of 0.02s. So my waveform has amplitude of 0.38 with frequency of 5hz.
I feed my waveform into a spectra measurement vi, and lo! the graph I see has a dominant amplitude of 0.38 with frequency of 0hz. How come the dominant amplitude is not at frequency of 5hz?
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12-14-2010 03:38 PM
NO!
Your waveform has an amplitude of 0.328, a sample rate of 5 S/sec and no frequency- since it is a line. Put a graph on the input to the FFT
12-15-2010 12:30 AM
O ya!