Gw-instek APS-1102 Control Software User Manual Manual de usuario Pagina 89

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APS-1102A Control Software User Manual
76
Vertical compression/expansion
As an example of vertical compression/expansion of the waveform, we will generate a trapezoidal
waveform by expanding and clipping the triangle waveform.
Step 1:
Display [New Arbitrary Waveform Editing Panel].
In its initial state, a sine wave is selected.
Select [Triangle] from [Wave] combo box.
Click All-Page OK button to return to waveform display screen.
Step 2:
Click Compress/Expand button on Select Item Panel.
You can also click [Tool] - [Compress/Expand] to obtain the same result.
Select Item Panel is changed to [Compress/Expand Panel].
Step 3:
In the numeric area on the right of [Max], change [32767] to [100000], then press ENTER
key.
In the numeric area on the right of [Min], change [32767] to [100000], then press ENTER
key.
In the waveform display section, you can see that the triangle waveform is expanded vertically
and clipped, transforming to a trapezoidal waveform.
Step 4:
Click OK button to return to waveform display screen.
Description 1:
You can also use the maximum/minimum numeric values specified in the step 3 to
compress the waveform vertically or move the waveform up or down. If the +/ full scale
is exceeded as a result of the expansion or movement, the waveform will be clipped at the
+/ full scale point.
Description 2:
You can compress/expand only a part of a waveform by selecting that part of the
waveform using A marker (red) and B marker (blue) in the waveform display screen
beforehand.
Description 3:
If the +/ full scale is not reached by the waveform, you can expand the waveform to
maximum amplitude by clicking Expand with Fixed Offset button or Expand with
Offset Clear button.
Description 4:
If the maximum is set to [100000] and the minimum is set to [100000] in the step 3, the
waveform will be flipped.
Description 5:
While you used [Max/Min] to specify the compression/expansion rate in this example, you
can also use [Amplitude/Offset] to do so. Click
(option button) on the left of
[Amplitude/Offset] to turn it to (selected). Next, set [Amplitude] to [200000] and
[Offset] to 0 to obtain the same result as this example.
Description 6:
In this example, you generated the trapezoidal waveform by clipping the triangle
waveform. You can generate it more easily by setting [Transition] against the square
waveform.
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