Scaled Window

Applies a scaled window to the time-domain signal and outputs window constants for further analysis. The windowed time-domain signal is scaled so that when the power or amplitude spectrum of the windowed waveform is computed, all windows provide the same level within the accuracy constraints of the window. This VI also returns important window constants for the selected window. These constants are useful when you use VIs that perform computations on the power spectrum, such as the Power & Frequency Estimate VI.

You can use this polymorphic VI to apply a scaled window to a single channel or multiple channels. The data type you wire to the signal in input determines the polymorphic instance to use.

Scaled Window for 1 Chan

signal in is the signal to be windowed.
window is the time-domain window to be used.

0None
1Hanning
2Hamming
3Blackman-Harris
4Exact Blackman
5Blackman
6Flat Top
7Four Term Blackman-Harris
8Seven Term Blackman-Harris
9Low Sidelobe
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurs before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
signal out is the windowed signal.
window constants window constants contains important constants for the selected window.
eq noise BW is the equivalent noise bandwidth of the selected window. To compute the power in a given frequency span, divide a sum of individual FFT lines by this value.
coherent gain is the inverse of the scaling factor applied to the window.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Scaled Window for N Chan

signals in is the array signals to be windowed.
window is the time-domain window to be used.

0None
1Hanning
2Hamming
3Blackman-Harris
4Exact Blackman
5Blackman
6Flat Top
7Four Term Blackman-Harris
8Seven Term Blackman-Harris
9Low Sidelobe
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurs before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
signals out returns the array of windowed signals.
window constants window constants contains important constants for the selected window.
eq noise BW is the equivalent noise bandwidth of the selected window. To compute the power in a given frequency span, divide a sum of individual FFT lines by this value.
coherent gain is the inverse of the scaling factor applied to the window.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.