User Manual

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8.7 Analysis Function
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8
.7.2 Linear Spectrum [LIN]
Functio
n
Horizonta
l
curso
r
Vertica
l
curso
r
Vertical axis Display
LIN-REAL (real-number part) |Fa|･cos ∠θa
LIN-IMAG (imaginary-number part) |Fa|･ sin ∠θa
LIN-MAG (amplitude) |Fa|
LOG-MAG (logarithmic amplitude) 20･log |Fa|
PHASE (phase) ∠θa
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 1/400 to 1/4000 the maximum frequency range
value to the maximum 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=αVp-p)
PHASE Degrees (deg) display of phase component of data
Imag Linear display of imaginary-number part of the data as voltage
(Nyquist mode)