{"id":846,"date":"2014-04-24T14:29:56","date_gmt":"2014-04-24T21:29:56","guid":{"rendered":"https:\/\/www.circuitspecialists.com\/blog\/?p=846"},"modified":"2014-06-20T11:16:51","modified_gmt":"2014-06-20T18:16:51","slug":"using-fft-in-digital-storage-oscilloscopes","status":"publish","type":"post","link":"https:\/\/www.circuitspecialists.com\/blog\/using-fft-in-digital-storage-oscilloscopes\/","title":{"rendered":"Using FFT in Digital Storage Oscilloscopes (DSO)"},"content":{"rendered":"

Many modern Digital Storage Oscilloscopes<\/a> (DSOs) have advanced mathematical operations available that typically include varying degrees of FFT analysis of the observed waveform. Fast Fourier Transform (FFT) allows the frequency content of a signal to be displayed along with the amplitude of these various frequency components.<\/p>\n

Since the FFT operation is a mathematical operation, it requires a large amount of computing time to properly display the information. For these reasons, FFT operation in a DSO is not equivalent to a spectrum analyzer, but oftentimes it is sufficient for many applications.<\/p>\n

FFT analysis of a signal is useful for tracking down EMI\/RFI problems and for detecting spurious oscillations in circuitry. It is also useful for displaying the harmonic content of various waveforms and tracking down problems in switching power supplies<\/a>. Distortion created by nonlinear operation of analog circuitry can easily be shown using FFT analysis. This phenomenon is essentially impossible to view using a standard time domain representation of the signal as is shown with a standard DSO display of the waveform.<\/p>\n

FFT analysis is an extremely useful tool available to the technician or engineer. It can provide insight into the operation of a circuit and help determine which components or operating parameters are causing problems. Since this function is entirely a mathematical operation, it is implemented in the firmware of the DSO and therefore does not require additional hardware to implement, and therefore does not increase the cost of the unit.<\/p>\n","protected":false},"excerpt":{"rendered":"

Many modern Digital Storage Oscilloscopes (DSOs) have advanced mathematical operations available that typically include varying degrees of FFT analysis of<\/p>\n","protected":false},"author":42,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[1,6],"tags":[],"class_list":["post-846","post","type-post","status-publish","format-standard","hentry","category-all-posts","category-digital-storage-oscilloscope"],"yoast_head":"\nUsing FFT in Digital Storage Oscilloscopes (DSO) | Simply Smarter Circuitry Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.circuitspecialists.com\/blog\/using-fft-in-digital-storage-oscilloscopes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" 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