User manual

FFT Analyzer
4-84
AM700 Audio Measurement Set User Manual
Hann
Flat-top
Kaiser-Bessel
B
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st s
e
l
e
ct
ivi
t
y
i
f th
e
s
i
g
n
al fr
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qu
en
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y
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xactl
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e
qual
to a frequency bin, poor resolution of adjacent
frequencies, poor amplitude accuracy. Used to look for
transients that do not fill the entire record.
U
niform (no window
)
Most used compromise; good selectivity, good
resolution, good amplitude accuracy.
Used for best amplitude accuracy; adjacent
frequency resolution poorer.
Best resolution at base, fair resolution at
center, fair amplitude accuracy.
Similar to Blackman-Harris
and Saramaki Rajan
Normalized
frequency deviation
Figure 4-38: Effects of Window selections
User. A user-developed window can be selected. That selection will draw its window
definition from a user-generated file. A user-window file has the following form: