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Pregunta 86

What is vestigial sideband modulation?

  1. Amplitude modulation in which one complete sideband and a portion of the other are transmittedRespuesta correcta
  2. A type of modulation in which one sideband is inverted
  3. Narrow-band FM modulation achieved by filtering one sideband from the audio before frequency modulating the carrier
  4. Spread spectrum modulation achieved by applying FM modulation following single sideband amplitude modulation

Explicación

Vestigial sideband is ordinary amplitude modulation in which one sideband is transmitted in full and only a vestige of the other is kept. It is not a form of sideband inversion, narrowband FM, or spread spectrum.

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Pregunta 86: What is vestigial sideband modulation? · FCC Amateur Extra Class (Element 4) · Questena