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This is a simple, video tutorial to review the basic features of a spectrum analyzer, using an Analog Arts (analogarts.com/) SL937. We review three essential points about spectrum plots: 1- a spectral plot is in the frequency domain 2- it displays the signal's power on a logarithmic scale 3- the signal is displayed with respect to a chosen reference level on the top of the screen. Please help us with tutorial articles by writing to: info@analogarts.com