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USER'S MANUAL. OD-590/91/92
6.3.2 Run FFT operation.
(Not available for Channel3 and Channel4).
The FFT (Fast Fourier Transform) function converts a time-domain
signal into its frequency components
Operation
MATH
1.
Press the Math key→F1. Press F1 repeatedly until "FFT" comes up.
2.
To select the subject channel, press F2 repeatedly.
3.
To select the FFT window type, press F3 repeatedly.
4.
To set the position of the resulted waveform, press F4. Then use the
Variable knob.
5.
To select the amplitude scale, press F5 repeatedly.
FFT Window
Rectangular
Blackman
Hanning
Flattop
Position
Amplitude scale
Page 75
F 1
FFT
F 2
Source
F 3
Window
F 4
Position
Unit/div
F 5
Suitable for transient analysis.
Frequency resolution is not as good as
Hanning, but comes with better sidelobe
rejection.
Higher frequency resolution.
Higher magnitude accuracy.
-12Div~+12Div.
1, 2, 5, 10, 20 dB/Div.
CH 1 / CH 2
Flattop / Rectangular
Blackman / Hanning
-12 Div ~ + 12 Div
20 / 10 / 5 / 2 / 1 dB
01-2007
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