19
FFT Scale
：
Log (The display range becomes wide when the FFT scale is set to Log. It is often used in
impact excitation measurement.)
Trigger operation mode
：
Repeat
Trigger source
：
Level
Pre-trigger
：
ON
Trigger level
：
1/8
～
2/8
Slope
：＋
The trigger conditions are set in the submenu [Measurement]. Press the MENU key, and go into the submenu
[Measurement] from the Menu List.
A measurement example of natural frequencies of a stainless plate (200mm×100mm×20mm)
：
The 2.54 kHz and the 2.89 kHz are natural frequencies.
Setting the trigger conditions
FFT
(acceleration)
Time waveform
(acceleration)