10-3
IM DLM3054-01EN
Time Window (Window)
Set the time window to one of the settings below.
• Rectangle (rectangular window)
• Hanning (Hanning window)
• Flattop (flattop window)
Waveform Display Mode (Mode)
Select how to display FFT waveforms from one of the settings below.
• Normal: Displays FFT waveforms for each acquisition
• Max Hold: For each frequency, the instrument holds the maximum value among the values acquired from the
start of analysis up to the current acquisition and displays it.
• Average: For each frequency, the instrument 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, Math1 to Math4
Unit Setting (Unit)
Select the unit type from one of the settings below.
• AUTO: The default unit is used. The unit varies depending on the type spectrum.
• User Define: You can assign a unit (User Unit) using up to four characters.
Number of FFT Points (FFT Point)
You can select from one of the settings below.
1.25 k, 2.5 k, 12.5 k, 25 k, 125 k, 250 k, 1.25 M
Relationship between the Number of FFT Points and Number of Displayed Points (Display Record
Length)
Depending on the number of displayed points in the window that you select using the analysis range (Time
Range) setting, the actual number of FFT points may be different from the number of FFT points that you
selected.
• If the number of FFT points is less than the number of displayed points, the displayed points are sampled
to match the number of FFT points.
The FFT may not cover the entire display range.
• If the number of FFT points is greater than the number of displayed points, the number of FFT points is
adjusted to an appropriate number less than or equal to the number of displayed points.
Analysis Range (Time Range)
Set the analysis range to any of the following windows below.
• Main: Entire main window
• Zoom1: Entire Zoom1 window
• Zoom2: Entire Zoom2 window
10 FFT