A Closer Look at Sidebands in the FFT Spectrum

An isometric illustration of a sideband waveform and a maintenance technician dressed in a blue work uniform and hardhat looking at it with binoculars. The man is small in comparison to the size of the waveforms.

There are times when you will observe sidebands in the Fast Fourier Transform (FFT) spectrum. These sidebands are a common occurrence and are often linked to specific mechanical and electrical issues such as gear mesh frequencies, inner race bearing faults, and various electrical anomalies. Understanding their significance requires a deeper examination. Sidebands provide critical insights…

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