EDIT Menu

￿Data Value. This item selects the handling of overlapping regions in the shift.

Add

The shifted data and the overlapping data are added.

Replace Replaces the region with the shifted data. When Type is Compress, the data for points shifted beyond the center is lost.

￿Cursor Point. This item selects whether the data boundary points are interpolated.

When the Cursor Point is Exclude

The points on the left and right vertical bar cursors are not interpolated. Figure 3 -57 shows the original data at the left and the shifted data at the right.

Original ￿ata

￿ata Shifted to Right by 0.5

Figure 3 ￿57: Shift with •Cursor Point" Set to •Exclude"

In this case, the first and last data points remain at their original values, exactly as though they had not been shifted. However, this error can be made inconspicuous by the insertion of an appropriate anti-aliasing filter.

When the Cursor Point is Include

The points on the left and right vertical bar cursors are interpolated.

￿Smooth +/± Points. This item specifies the smoothing width with points at the data boundary positions. Smoothing is only performed over the points specified for the area around the boundary positions. No smoothing is performed if this point is set to zero. Points can be set between 0 through 20.

Smoothing is performed on a specified region without regard for the shift. The smoothing technique takes the average of the point itself and the two adjacent points (three points) as the new value.

Figure 3 -58 shows an example, with the original data shown on the left and the smoothed data shown on the right.

AWG2021 User Manual

3 ￿77