Frequency domain filtering of traces (*)
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"Butterworth" - Butterworth filter tool
"Amplitude" - Zero-phase filter tool
"Gaussian" - Gaussian filter tool
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Butterworth filter tool: Butterworth band-pass filtering of traces
"Apply" - apply the filter with the current filter settings
"Low Freq: <nnn>" - displays low frequency corner (Hz), and accepts input of a new value
"High Freq: <nnn>" - displays high frequency corner (Hz), and accepts input of a new value
"Num Poles: <nnn>" - displays number of filter poles, and accepts input of a new value
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Amplitude filter tool: Zero-phase band-pass filtering of traces
"Apply" - apply the filter with the current filter settings
"Low Freq: <nnn>" - displays low frequency corner (Hz), and accepts input of a new value
"High Freq: <nnn>" - displays high frequency corner (Hz), and accepts input of a new value
"Num Poles: <nnn>" - displays number of filter poles, and accepts input of a new value
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Gaussian filter tool: Gaussian band-pass filtering of traces (*)
"Apply" - apply the filter with the current filter settings
"Cent Freq: <nnn>" - displays filter center frequency (Hz), and accepts input of a new value
"Alpha: <nnn>" - displays filter alpha (decay) value, and accepts input of a new value
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