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The __________ field of an ARINC 429 word identifies the parameter it carries.

  • A.label
  • B.sign status matrix
  • C.parity
  • D.source destination identifier

Answer: A

It occupies the first eight bits and is conventionally written in octal. Because it names the parameter rather than any equipment, a receiver simply listens for the labels it happens to need. No negotiation is required.

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