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Հարց 470

What is the definition of symbol rate in a digital transmission?

  1. The number of control characters in a message packet
  2. The maximum rate at which the forward error correction code can make corrections
  3. The rate at which the waveform changes to convey informationՃիշտ պատասխան
  4. The number of characters carried per second by the station-to-station link

Բացատրություն

Symbol rate is the number of symbols transmitted per second, Rs = 1/Ts, where Ts is the duration of one symbol — the rate at which the waveform is updated to convey information. It counts symbol intervals rather than visible transitions, since a repeated symbol produces no change in the waveform yet still counts, and it is not the bit rate, because a symbol drawn from more than two states carries several bits.

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