Structure and principle of FFT Analyzer



Structure and principle of FFT Analyzer

FFT, an abbreviation for Fast Fourier Transform, is an algorithm to transform time series signal to frequency axis signal. A continuous signal voltage from sensors such as vibration detector or microphone is sampled in regular intervals, and performed analog-digital conversion to FFT calculation. To avoid aliasing phenomenon that provides us with the frequency components which do not exist in actuality, low pass filter is used before sampling. FFT processed signal is calculated to power spectrum, frequency response or others and made best use of presuming abnormal part of the instrument or natural vibration measurement of structures which is difficult in waveform analysis. For more details, see the page [Ono Sokki Technical Report (FFT Analyzer)].

FFT Analyzer

CF-4500 FFT Comparator
CF-3650 4-channel Portable FFT Analyzer
CF-3850 8-channel Portable FFT Analyzer
CF-7200A 2-channel Portable FFT Analyzer
CF-9200/9400 Portable 2 channel/4 channel FFT Analyzer
DS-3200 series Sound and vibration real-time analysis system

Related products

• Products for acoustic measurement

(Microphone, sound intensity probe, sound level meter, sound quality evaluation etc.)


• Products for vibration measurement

(Accelerometer, impulse force hammer, vibration comparator, vibrometer etc.)



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