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| View Original: | AM signal.png (640x513) | |||
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| Keywords: AM signal.png The frequency spectrum of a signal from an AM radio station on the medium wave band The vertical coordinate is time the horizontal coordinate is frequency The central bright line is the radio transmitter's carrier On either side of it are the sidebands that contain the modulation the information that the radio station is sending which is an audio signal that represents sound As time progresses moving down the graph the sidebands change representing the changing tones of the of the speech or music that is being transmitted Regions in the sidebands near the central carrier represent low audio tones while regions farther from the carrier represent higher frequency tones Received with a Sangean ATS909 radio and FFT'd in baudline; image edited in GIMP 2007-06-21 Mysid Amplitude modulation | ||||
