
10
②
Setting the Window function
Press the MENU key, and go into the submenu [FFT] from the Menu List. Then select the “Window function”
to a suitable setting.
The window function is chosen as follows according to the measurement purpose.
◆
Rectangular : It is used for the phenomena without repetition like a single pulse.
◆
Hanning : It is used for the usual measurement.
◆
Flattop : It is used for reading the amplitude correctly, although the frequency resolution may be worse.
③
Selecting the measurement data type
Select the measurement data type by pressing the ACC/VEL/DISP key.
Acceleration, Velocity, Displacement, and Envelope are selectable.
Maximum frequency
ACC/VEL/DISP key
Frequency span
Setting the Window function
ACC/VEL/DISP/
ENVELOPE
Number of analysis
lines