Analog, sonic sampling 3. post-processing – Casio EA-200 Technical Reference User Manual
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Output Example
When the list is: 85(1010101), 34( 100010), 187(10111011), 204(11001100)
Following receipt of Command 3, output starts as soon as a Trigger Source is
generated.
The following can be specified as a Trigger Source.
0: None, 1: [Start] key, 10: Countdown, Command 8
Output is interrupted when the Start/Stop key is pressed.
Output is from Pin 1 of CH3.
Vout
Ϯ3V (Iout maximum 100mA)
Analog, SONIC Sampling
3. Post-Processing
(Operation 1–4, 7–10)
0 None (no calculation)
1 d/dt
2 d
2
/dt
2
10 FFT (Fast Fourier Transformation)-Real
11 FFT-Real, Imaginary
Calculation Methods
<
(dx/dt)
n
= (X
n+1
– X
n–1
) / (2t)
(dx/dt)
1
= (X
2
– X
1
) / t
(dx/dt)
m
= (X
m
– X
m–1
) / t
x
n
: nth data
t:
Sampling period
m
:
Maximum value of n
<
(d
2
x/dt
2
)
n
= (X
n+1
– 2
`
X
n
+ X
n–1
) / t
2
(d
2
x/dt
2
)
1
= (X
3
– 2
`
X
2
+ X
1
) / t
2
(d
2
x/dt
2
)
m
= (X
m
– 2
`
X
m+1
+ X
m–2
) / t
2
* First and second derivatives are supported only when timer is the sampling
trigger.
Mic
(Channel = 10)
0 Clear channel information.
1 Active
Analog Out, speaker
(Channel = 11, 12)
0
Clear channel information.
1–65535
Number of loops
Select Data
Select the data to be output by the sampling period.
0
List data
1
CH1 sampled values
2
CH2 sampled values
3
CH3 sampled values
10 Mic sampled values
Step
(Select Data 1, 2, 3, 10)
Number of steps for output sampled data
1, 2, 4, 8, 16
D8
D7
D6
D5
D4
D3
D2
D1
85
34
187
204
Clock