October 2014
Page
35
Type
Characteristics
Window
Hanning
This is a very good window for measuring
amplitude accuracy but less so for resolving
frequencies.
Use Hanning for measuring sine, periodic, and
narrow band random noise. This window works
on transients or bursts where the signal levels
before and after the event are significantly
different.
Blackman
This is the best window for measuring the
amplitude of frequencies but worst at resolving
frequencies.
Use
Blackman-Harris
for
measuring
predominantly single frequency waveforms to
look for higher order harmonics.
Figure 29, Figure 30, Figure 31, Figure 32 show four kinds of window function
referring to sine wave of 1KHz.
Figure 29.
Blackman window.
