YOKOGAWA FG410, Руководство пользователя

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3.5 Numerical Expression Waveform
3.5 Numerical Expression Waveform
This section explains how to create a waveform by superposing 3rd and 5th harmonics over the
fundamental wave, as a sample of generating a waveform with a numerical expression.
Step 1: Select
[Setup] - [Setup]
.
The screen titled
[YOKOGAWA ARB Edit - System Setup]
appears.
Step 2: Click the
[Unit]
page tab.
Step 3: Click the button to the right of
[X-Axis Unit]
and click
[User Unit]
from the
displayed list.
Leave the minimum value to the maximum value two lines below as their initial
values,
[0.000000 - 1.000000]
.
Step 4: Click the button to the right of
[Y-Axis Unit]
and click
[User Unit]
from the
displayed list.
Leave the minimum value to the maximum value in the last line as their initial
values,
[-1.000 - 1.000]
.
Step 5: Click the
OK
button to return to the waveform display screen.
Step 6: Click the button at the left top of the screen.
Step 7: Click the button to the right of
[Function]
and click
[Waveform Function]
from the displayed list.
Step 8: Input
[s=2*pi;]
in the input area to the right of
[Constant]
.
Input [sin(x*s)+sin(x*s*3)/3+sin(x*s*5)/5] in the input area to the right of [Y=] .
Step 9: Click the
Compute
button. The calculated waveform is displayed on the waveform
generation screen.
Step 10: Click the
All Page OK
button to return to the waveform display screen.
Explanation 1: In this example, the horizontal line (X) is treated as 0 to 1 by using the custom unit.
Likewise, the vertical line (Y) is treated as ±1 as a whole.
The expression of one cycle of the sine wave is made easier by defining s=2
π as a
constant so that [x*s] is expressed in a formula.
Explanation 2: If you set the X range for the custom unit to 0 to 6.283185 (2 π ) at step 3, the
expression becomes simpler: [sin(x)+sin(x*3)/3+sin(x*5)/5] .
IM FG410-61EN
3-5