What A Spectrum Plot Tells About A Signal 

This is a simple video tutorial to cover the basics of spectrum plots, an Analog Arts (analogarts.com/) oscilloscope. We review spectrum plots of a few waves and their frequency components. We cover the fact that a signal is a composition of a number of sinusoidal functions with given amplitude, frequency, and phase. We cover the sinusoidal function. We also analyze the composition of more complex signals.