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Key terms: frequencies signal sum heterodyne mixed rf cos mhz difference optical vhs pi f frac oscillator khz detection filter modulation mixer ntsc output subcarrier theta fixed detectors varphi identity antenna circuit electronic new frequencies variable amplifier videotape sine wave principle amplitude signal processing trigonometric one at the sum two frequencies color subcarrier original heterodyne optical frequencies two new frequencies original frequencies heterodyne detection heterodyne technique intermediate frequency superheterodyne receiver Search external links cited by footnotes on Wikipedia page Heterodyne: |
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