User Manual

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8.7 Analysis Function
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8
.7.3 RMS Spectrum [RMS]
Functio
n
D
C components: Ra = F
a
Ra = Fa
= |Ra|exp(jθa)
= |Ra|(cos ∠θa + jsin ∠θa
)
Horizonta
l
curso
r
Vertica
l
curso
r
Vertical axis Display
LIN-REAL (real-number part) |Ra|･cos ∠θa
LIN-IMAG (imaginary-number part) |Ra|･sin ∠θa
LIN-MAG (amplitude) |Ra|
LOG-MAG (logarithmic amplitude) 20･log |Ra|
PHASE (phase) ∠θa
NOTE
Displays the frequency domain waveform of the input signal, including magnitude
(effective value) and phase information.
Major applications include:
・Determining the peaks of waveform frequency components.
・Determining the effective values of frequency components.
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.
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 Vrms)
PHASE Degrees (deg) display of phase component of data
The RMS spectrum display and the LOG-MAG display express the same
processing result.