Apply Window Function dialog box

 

Use this dialog box to apply window functions to data in Predictive Systems Lab documents. Windows are particularly useful for controlling spectral leakage.

 

Input

Specifies the worksheet location of the input data for this operation.

 

Valid Input Range

Provides a reference to the extent of the data available in the currently active worksheet. Use this range as a guide for typing valid extents in the Input Range box.

 

Input Range

Type in this box the range of cells containing the data you want to use as input for this command.

 

Series in Rows

Check this box to indicate that the data specified by the Input Range box is organized in rows as opposed to columns (the default).

 

Refer to Specifying Input Arguments for additional information on this subject.

 

Output

Specifies the worksheet location for placing the results of this operation.

 

New Workbook

Select this option to place the results of this operation in a new document workbook.

 

New Sheet

Select this option to place the results of this operation in a new worksheet.

 

Range Position

Select this option to place the results of this operation starting at the worksheet location specified in the box to the right of this option.

 

Refer to Specifying Output Locations for additional information on this subject.

 

Options

 

Window Type

Specifies the window function that will be applied to the data. Select one of the predefined windows:

 

Barlett

 

 

Blackman

 

 

Blackman-Harris

 

 

Dolph-Chebyshev

This window type requires an additional argument, , usually larger or equal to 2. This window is created in the frequency domain for N points (closed version), or N+1 points (open version), and is defined as the inverse Fourier transform of , where is given by:

 

 

In addition to this, when constructing Dolph-Chevishev windows, ten (10) frequency points are sampled for each window point.

 

Half Cycle Sine

 

 

Hamming

 

 

Hann

 

 

Kaiser

This window type requires an additional argument, , usually larger or equal to 3.

 

 

Where is the zeroth order modified Bessel function of the first kind.

 

Parzen (Triangular)

 

 

Welch

 

 

Window Argument

Some window types may require additional arguments. Type in this box a value of your choice.

 

Refer to the equations above for information on the effect of this argument on the Dolph-Chebyshev and the Kaiser windows.

 

Closure

Specifies the first and last window points to the same value, usually zero. Leaving this box clear produces a window whose last point value does not reach the initial window point value.

 

 

 

OK

Closes the dialog box and carries out this operation.

 

Cancel

Closes the dialog box without carrying out this operation.