Hioki 8847 - Display Color; Beep Sound; Language; Auto Scale

13.9 FFT Analysis Modes
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Chapter 13 FFT Function
Waveform Example
 Emphasizing only a Specific Portion (Highlighted Display)
A specific portion of a phase spectrum can be emphasized and displayed.
See: "13.3.8 Emphasizing Analysis Results (phase spectra only)" ( p.219)
Phase Spectrum
Shows the phase characteristics of the input signal.
Main uses:
• To inspect the phase spectrum of channel 1. Displays the phase of a cosine waveform as a reference (0º).
• To inspect the phase difference between channels 1 and 2.
See: About the Functions"13.9.2 Analysis Mode Functions" ( p.254)
1 Ch FFT: Displays the phase of the signal on channel 1. Displays the phase of a cosine waveform as a ref-
erence (0º). Unless the waveform is synchronous, phase values are unstable.
2 Ch FFT: Displays the phase difference between channels 1 and 2. Positive values indicate that the phase
of channel 2 is leading.
Axis Display Type Description
X axis
Linear Frequency is displayed with equal spacing
Log Frequency display of logarithm interval
Y axis Lin-Mag Analysis values are displayed linearly.
1chFFT
X axis: Log
Y axis: Lin-Mag
2chFFT
X axis: Log
Y axis: Lin-Mag