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  1. Modulation (1967 Film)

    Director
    A E C Hopkins
    Subject
    Physics
    Distribution
    Film (16mm)

    Animated diagrams show how intelligence is impressed on a carrier wave to form modulation. Explains vectors, amplitude phase and frequency modulation.*

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  2. Time and Frequency (6 Parts) (1974 Video)

    Subject
    Engineering
    Distribution
    Free loan Sale, Videocassette. U-matic. b&w. 6 x 10 min.

    1: Uses a spectrum analyser and oscilloscope to show that non-sinusoidal periodic signals can be resolved into harmonic frequency components. 2: Demonstrates the principle of amplitude modulation, showing...

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  3. Wave Generation and Classification (1977 Video)

    Subject
    Physics
    Distribution
    Sale, Videocassette. VHS. b&w. 7 min., 1996 sale: £20.00 (+VAT +p&p)

    Harmonic oscillations, wave propagation, sine wave, frequency, wavelength, wave speed, period of oscillation, running wave, standing wave, plane wave, spherical wave, transversal wave, longitudinal wave,...

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