In the WinDaq Waveform Browser, you can draw
a graphic selection rectangle
and just a plain selection rectangle.
A graphic selection rectangle is used to print a portion of waveform graphics
(bounded by the rectangle) or to copy a portion of graphics onto the clipboard.
A selection rectangle is used in conjunction with the mouse to offset
and/or scale a waveform.
Both rectangles are drawn the same way, only
the graphic selection rectangle is created with the right mouse button
while the selection rectangle is created with the left.
A graphic
selection rectangle is drawn by positioning the mouse pointer anywhere
in the waveform strip area and dragging with the right mouse button until
the rectangle encloses the area you wish to print or copy to the clipboard.
When the mouse button is released, the rectangle remains fixed in size.
You can now choose Print from the File menu and select the Graphic Selection
Rectangle method from the Print dialog box to print, or choose Copy from
the Edit menu to load the image onto the clipboard.
A plain
selection rectangle is drawn by positioning the mouse pointer anywhere
in the waveform strip area and dragging with the left mouse button until
the rectangle reaches the desired size. When the mouse button is released,
the rectangle remains fixed in size. Once a selection rectangle is drawn,
several operations become functional, depending upon where the mouse pointer
is positioned (i.e., the left/right annotation line, or the bottom annotation
line) and which mouse button is clicked. The following examples illustrate
how the selection rectangle can be used in typical offsetting and scaling
operations.
The
original waveform. The object is to offset the waveform from its current
position to a position centered on the baseline. Note that the “1=1” annotation
in the left annotation margin is highlighted, indicating window 1 is enabled
for adjustments.
Drag
the left mouse button to draw a selection rectangle. The size (and placement)
of the rectangle is immaterial. In this example, it was drawn to approximate
the vertical limits of the waveform so it could be accurately centered
on the baseline. Note that the rectangle remains fixed in size when the
left mouse button is released.
With
the mouse pointer positioned inside the selection rectangle, drag the
rectangle to achieve the desired offset (in this example, vertically centered
on the baseline).
The
offset waveform. When the left mouse button was released, the waveform
was vertically offset by the amount the rectangle was dragged (within
the limits of the A/D converter). Note the waveform’s numerical values
in the left annotation margin reflect the new position.
The
original waveform. The object is to scale a small section of waveform
so it fills the entire strip area, thus allowing the small section to
be examined in greater detail. Note that the “1=1” annotation in the left
annotation margin is highlighted, indicating window 1 is enabled for adjustments.
Drag
the left mouse button to draw a selection rectangle. Once again, the size
of the rectangle is immaterial. In this example, it was drawn on the very
tip of the waveform because this is the area of interest that we would
like to examine in greater detail. Note that the rectangle remains fixed
in size when the left mouse button is released.
The
scaled waveform, accomplished by clicking the left mouse button in the
left annotation margin. The contents of the selection rectangle have been
scaled to fill the entire waveform strip area.
