10-24
IM DLM6054-01EN
Explanation
Analysis Source Waveform (Trace)
Select the analysis source waveform from the options indicated below. The available waveforms vary
depending on the model.
CH1 to CH4 and M1 to M4.
FFT Conditions (Setup)
You can configure the time window and how to display FFT waveforms (normal, peak hold, or
average).
On models with user-defined computation (optional), you can also select the spectrum to analyze.
Spectrum Type (Type/Sub Type)
On models with user-defined computation (optional), you can select the spectrum to analyze from
the following options:
Spectrum Description
LS-MAG Magnitude of the specified waveform’s linear spectrum
LS-LOGMAG Logarithmic magnitude of the specified waveform’s linear spectrum
LS-PHASE Phase of the specified waveform’s linear spectrum
LS-REAL Real part of the specified waveform’s linear spectrum
LS-IMAG Imaginary part of the specified waveform’s linear spectrum
RS-MAG Rms power spectrum magnitude
RS-LOGMAG Rms power spectrum logarithmic magnitude
PS-MAG Magnitude of the specified waveform’s power spectrum
PS-LOGMAG Logarithmic magnitude of the specified waveform’s power spectrum
PSD-MAG Magnitude of the specified waveform’s power spectrum density
PSD-LOGMAG Logarithmic magnitude of the specified waveform’s power spectrum density
CS-MAG Magnitude of the cross spectrum of the specified two waveforms
CS-LOGMAG Logarithmic magnitude of the cross spectrum of the specified two waveforms
CS-PHASE Phase of the cross spectrum of the specified two waveforms
CS-REAL Real part of the cross spectrum of the specified two waveforms
CS-IMAG Imaginary part of the cross spectrum of the specified two waveforms
TF-MAG Magnitude of the transfer function of the specified two waveforms
TF-LOGMAG Logarithmic magnitude of the transfer function of the specified two waveforms
TF-PHASE Phase of the transfer function of the specified two waveforms
TF-REAL Real part of the transfer function of the specified two waveforms
TF-IMAG Imaginary part of the transfer function of the specified two waveforms
CH-MAG Magnitude of the coherence function of the specified two waveforms
Time Window (Window)
Select the time window that you want to use from the options listed below.
• Rectangle (rectangular window)
• Hanning (Hanning window)
• Flattop (flattop window)
Waveform Display Mode (Mode)
Set the FFT waveform display mode to one of the options listed below.
• Normal: The DL6000/DLM6000 displays FFT waveforms for each acquisition.
• Max Hold: For each frequency, the DL6000/DLM6000 holds the maximum value among the
values acquired from the start of analysis up to the current acquisition and displays it.
• A
verage: For each frequency, the DL6000/DLM6000 displays the average of the values
acquired from the start of analysis up to the current point.
Analysis Source Waveform (Trace2)
When the spectrum type is CS, TF, or CH, you can choose from the following options.
CH1 to CH4 and M1 to M4.
10.5 Performing FFT Analysis
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