Tabor Electronics 5251, Руководство пользователя

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TE5251
User Manual
3-38
Edit Commands The Edit commands are used for manipulating the waveform that is
drawn on the screen. The editing commands are explained in the
following paragraphs.
Autoline
The Autoline command lets you draw straight-line segments. To
draw a line the left mouse button at the start point. Click again at
the next point and then click on the right mouse button to terminate
this operation.
Sketch
The Sketch command lets you draw free-hand segments. To draw a
line using this command click and hold the left mouse button at the
start point. Release the mouse button when you want to stop and
then click on the right mouse button to terminate this operation.
Smooth
The Smooth command lets you smooth out rough transitions on
your waveform. This is done mathematically by multiplying
waveform coordinates by the non-linear portion of a cubic parabola.
The Smooth operation is done on segments of the waveform that
are bound by anchors. Anchor operation is described later in this
chapter. Place the anchors on the left and right of your waveform
segment and select the Smooth command. The waveform will
change its shape immediately to follow the mathematical pattern of
a parabolic curve.
Note that small segments with fast transitions, when combined with
parabolic expressions have tendencies to generate even larger
transitions. Therefore, make sure you omit such sections of the
waveform when you use this operation.
Filter
The Filter used with this command is moving average. This is done
by recalculating each point as an average of symmetrical number of
adjacent points. When you select the Filter command, a dialog box
pops up, letting you program the filter spacing in number of
adjacent points. You can filter the entire waveform, or you may
chose to filter a segment of the waveform by placing the anchors as
boundaries on the left and right of the segment.
Invert
The Invert command lets you invert the entire waveforms, or
marked segments of waveforms. The waveform is inverted about
the 0-point axis.
Trim Left
The trim left command lets you trim waveforms to the left of the
anchor point. This command is grayed out if the left anchor was not
moved from its original left position. The waveform is trimmed and
the point at the left anchor point becomes the first point of the
waveform.