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Frage 468

What is digital time division multiplexing?

  1. Two or more data streams are assigned to discrete sub-carriers on an FM transmitter
  2. Two or more signals are arranged to share discrete time slots of a data transmissionRichtige Antwort
  3. Two or more data streams share the same channel by transmitting time of transmission as the sub-carrier
  4. Two or more signals are quadrature modulated to increase bandwidth efficiency

Erklärung

Time division multiplexing gives each stream the whole channel, but only during its own recurring time slot, and the receiver reassembles the streams by tracking slot timing within a repeating frame. All streams therefore share one frequency instead of one moment in time.

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Frage 468: What is digital time division multiplexing? · FCC Amateur Extra Class (Element 4) · Questena