Chapter 4 Feature and Function Reference

Waveform Edit Windows

The waveform edit window contains horizontal and vertical gridlines. To change the spacing of the horizontal and vertical grid lines select View Grid... from the Menu Bar.

The spacing of the vertical (up/down) grid lines is directly affected by the View Grid... command. The horizontal spacing (left/right) of the grid lines is automatically adjusted to standard values (such as 0, 0.25, 0.5, 0.75, or 1.0).

Grid line spacing is specified in terms of the number of screen display pixels between grid lines. While this spacing also relates to the number of waveform data points displayed between grid lines, the relationship is not always one-to-one due to the effects of zooming. Six levels of zooming

are provided (0 - 5), giving the pixel-to-number-of-data-points4 relationship in the following table:

 

Zoom Level

Waveform data points

 

per screen display pixel

 

 

0

(default - no zoom)

32

 

 

 

1

 

16

 

 

 

2

 

8

 

 

 

3

 

4

 

 

 

4

 

2

 

 

 

5

(fully zoomed in)

1

 

 

 

For example, if no zoom is in use, a spacing of 100 pixels between vertical grid lines relates to the display of 3200 (32 X 100) waveform data points between grid lines. At full zoom, a spacing of 100 pixels between grid lines results in 100 (1 X 100) waveform data points between grid lines.

To adjust grid line spacing, specify the number of pixels by clicking on the up/down arrows or type a number in the text box and click OK. Valid grid sizes range from 50 (default) to 200 pixels.

The waveform edit window can also be displayed in normal or high resolution viewing mode. Normal mode consists of points that have been uniformly sampled and chosen for display. High resolution mode displays all points of the waveform (Select View High Resolution from the Menu Bar). Operations on the waveform in high resolution mode will take longer to perform because the display will be updated at a slower rate.

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