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Pregunta 71

How is an upload signal processed by an inverting linear transponder?

  1. The signal is detected and remodulated on the reverse sideband
  2. The signal is passed through a nonlinear filter
  3. The signal is reduced to I and Q components, and the Q component is filtered out
  4. The signal is mixed with a local oscillator signal and the difference product is transmittedRespuesta correcta

Explicación

A linear transponder does not detect or demodulate anything; it translates a block of spectrum by mixing it with a local oscillator, and an inverting transponder transmits the difference product, which is the spectrum-reversed version of the uplink. Detection and remodulation, nonlinear filtering, or discarding an I/Q component would all destroy the linearity that lets the transponder carry many simultaneous signals of any mode.

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Pregunta 71: How is an upload signal processed by an inverting linear… · FCC Amateur Extra Class (Element 4) · Questena