COMPOSITION OF AN AM WAVE

Duration: 27 min

Year Published: 1944

Creator: Department of the Air Force (Department of Defense)

Color: B&W

Sound: Optical sound

Description: Discusses the frequencies in an amplitude modulated wave. Shows how frequencies are determined by applying an am wave to a selective filter circuit. The output of the filter circuit is applied to a r-scope, the filter is tuned through a given frequency range, and the frequencies contained in the am wave are displayed on the scope. Defines terms such as upper and lower sideband, and compares the power contained in the carrier, using different percentages of modulation. (Kinescope)