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8.7 FFT Analysis Function
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8.7.2 Linear Spectrum [LIN]
Function
Horizontal
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Vertical
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Displays the frequency domain waveform of the input signal, including
magnitude and phase information.
Major applications include:
・Determining the peaks of waveform frequency components
・Determining the levels of high and low harmonics
Fa = (fa)
=|Fa|exp(jθa)
=|Fa|(cos∠θa + jsin ∠θa)
LIN-Hz Frequency spectrum display as linear units.
The range is from DC to the maximum frequency range value.
LOG Hz Frequency spectrum display as logarithmic units.
The range is from between 1/400 and 1/4000 of value to the
frequency range value.
Real Linear display of real-number part of the data as voltage
(Nyquist mode)
LIN-REAL Linear display of real-number part of the data as voltage
LIN-IMAG Linear display of imaginary-number part of the data as voltage
LIN-MAG Linear display of analysis data as voltage
LOG-MAG Logarithmic display of analysis data as dB
(0dB reference value: 1 V peak=2V p-p)
PHASE Degrees (deg) display of phase component of data
Imag Linear display of imaginary-number part of the data as voltage
(Nyquist mode)
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