Basic FAQ for FFT Analyzer

FFT Analyzer is an electrical measuring instrument primarily aimed at digital frequency analysis in the low-frequency band using FFT technology, and is a type of spectrum analyzer (spectrum analyzer) in a broad sense. (Note: When the term "analyzer" is used, "spectrum" is generally implied, so it is described this way here.)

Spectrum analyzers, in the sense of converting time-domain signals into frequency spectra, can be broadly divided into the following two categories.

[1] sweeps the frequency of a local oscillator mixed with the input signal to obtain the frequency spectrum, while [2] converts time-domain data into spectral values for a specific frequency band using an A/D converter. Recently, high-frequency spectrum analyzers utilizing FFT technology have also been released for [1].

Recent FFT analyzers not only have frequency analysis capabilities but also possess analysis functions in the time domain and amplitude domain, characterizing them as comprehensive digital signal processing instruments for low-frequency signals. Additionally, there is a 1/N octave analyzer used as a spectrum analyzer for low-frequency bands in the context of analyzing acoustic vibration data.