Racal Instruments 3155 Spezifikationen PDF herunterladen (Seite 97)

User Manual 3155

3-44 ArbConnection

Edit Menu

The Edit menu is used for manipulating the waveform that is drawn

on the graph. The editing menu is explained in the following para-

graphs.

Autoline

Autoline mode lets you draw straight-line segments. To draw a line

using this command click 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 where you want to stop. Then

click on the right mouse button to terminate this operation.

Smooth

The Smooth command lets you smooth out rough transitions in your

waveform. This is done mathematically by multiplying waveform co-

ordinates by the non-linear portion of a cubic equation.

The Smooth operation is done on section of the waveform bound by

anchors. Place anchors to the left and right of your waveform section

and select the Smooth command. The waveform changes its shape

immediately to follow the mathematical pattern of a cubic curve.

Note that small sections with fast transitions, when combined with the

smooth function tends to generate larger transitions. Therefore, be

sure to omit such sections of the waveform when using this opera-

tion.

Filter

The Filter function uses a moving average. This is done by recalcu-

lating each point as an average of a symmetrical number of adjacent

points. When you select the Filter command, a dialog box pops up,

letting you program the filter spacing in units of adjacent points. You

can filter the entire waveform, or you may chose to filter a section of

the waveform by placing the anchors as boundaries.

Invert

The Invert function lets you invert entire waveforms or marked sec-

tions of waveforms. The waveform is inverted about the horizantal

axis bar.

Unmark

The Unmark function removes the anchors from the waveform

screen and resets them to point 0 and to the last waveform point.

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Racal Instruments 3155 Spezifikationen Seite 97