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ARINC 429 encodes bits using

  • A.Manchester encoding
  • B.Non-return to zero
  • C.Frequency shift keying
  • D.Bipolar return to zero

Answer: D

A null state between every bit makes the clock recoverable and removes any direct current component from the line. The three states are a positive pulse, a negative pulse and the null between them. The null carries the clock.

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