Casio GRAPH 25+ Pro - Manuel (Page 347)

20051101
2-5
Using the Setup Wizard
k Using Setup Wizard to Configure Settings for FFT (Frequency
Characteristics) Data Sampling
When you perform sound sampling executed the EA-200’s built-in microphone (by specifying
[CASIO] - [Microphone] as the sensor), Setup Wizard will provide you with three options:
[Sound wave], [Sound wave & FFT], and [FFT only]. “Sound wave” records the following two
dimensions for the sampled sound data: elapsed time (horizontal axis) and volume (vertical
axis). “FFT” records the following two dimensions: frequency (horizontal axis) and volume
(vertical axis).
The following shows the settings for recording FFT data.
1. Perform the first two steps of the procedure under “To configure an EA-200 setup using
Setup Wizard” on page 2-2.
2. On the “Select Sensor” screen, select [CASIO] - [Microphone] - [Sound wave & FFT] or
[CASIO] - [Microphone] - [FFT only].
• This causes a “Select FFT Range” screen to appear.
• You can select one of four settings for FFT Range. The setting you select will
automatically apply the applicable fixed parameters shown below.
Setting
Parameter
Frequency pitch
Frequency max
Sampling interval
Number of samples
2 Hz
1000 Hz
8192
2 - 1000 Hz:
1
61 sec
μ
4 Hz
2000 Hz
8192
4 - 2000 Hz:
2
31 sec
μ
6 Hz
3000 Hz
8192
6 - 3000 Hz:
3
20 sec
μ
8 Hz
4000 Hz
4096
8 - 4000 Hz:
4
31 sec
μ
The following explains the meaning of each parameter.
Frequency pitch: Pitch in Hz at which sampling is performed
Frequency max: Upper limit of sampling frequency (lower limit is fixed at 0 Hz)
Sampling interval: Interval in
μ seconds at which sampling is performed
Number of samples: Number of times sampling is performed
3. Use function keys
1 through 4 to select an FFT Range setting.
• Selecting an FFT Range causes the final Setup Wizard screen to appear.
4. Perform step 10 under “To configure an EA-200 setup using Setup Wizard” on page 2-2
to finalize the procedure.