Moving average smoothing
  

Accesible through main menu option Signal tools/Moving average smoothing or graphic toolbar button.

Smoothing is the operation that can very often help to extract some useful information from a noisy signal or indistinct FFT sequence. The overall effect of smoothing is similar to filtering  with the lowpass filter.

In SIGVIEW, smoothing is performed by using weighted central moving average method. In the corresponding dialog you can determine the type of weighting function to be used and its length.
Longer function will provide stronger smoothing effect on the signal.

graphic

If you want this operation to be performed on each FFT result after its calculation, you can turn it on in Spectral analysis defaults .

You can change the smoothing parameters for a smoothing window if you open Edit/Properties menu option from its context menu.
Moving average smoothing