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In many cases it is desirable to examine a waveform without any “noise” present to distort the true nature of the signal. This can be done by applying high-pass, low-pass, band-pass, and notch filter functions to the power spectrum to eliminate the noisy frequency components. The WinDaq Waveform Browser package provides high-pass filter, low-pass filter, band-pass filter, and notch filter functions to eliminate these unwanted frequencies from the plot. The high-pass filter removes all frequency components to the left of the position of the cross hair origin. The low-pass filter removes all frequency components to the right of the cross hair origin. The notch filter removes the frequency (or frequencies if the frequency axis is compressed) at the cross hair origin. The band-pass filter is a combination of high-pass and low-pass filters applied to isolate a narrow band of interest on the spectrum. The methods to edit the power spectrum are as follows:
