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ANALYSIS OPERATION
6-108
TMPM5200-2
6.13.5 Show FFT
FFT processing is applied to the data of a displayed graph.
The related function is Remove DC Bias.
Select Show FFT from the Analyse pull-down menu. The names of the FFT
windows will be displayed in the pulldown sub-menu. The following FFT
windows are provided:
FFT window
Description
No window
FFT without window
Cosine window
W (n) = 0.5
−
0.5cos (10n
π
/N)
Parzen window
W (n) = 1
−
{n
−
0.5 (N
−
1)}2/0.5 (N+1)
Cosine arch
W (n) = 1
−
n
−
0.5 (N
−
1)/0.5 (N+1)
Hamming
W (n) = 0.54+(1
−
0.54) cos (2
π
n/N)
Select a desired FFT window. FFT is performed and the result is displayed.
The DC bias component is automatically eliminated before the FFT execution.
