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Tag: #avionics

ARINC 429 BNR Fields

ARINC 429 defines the physical layer (shielded, twisted pair, differential, return to zero), the basic data unit (word), and a file transfer protocol. A 32-bit word encodes aircraft data as:

There are also wild combinations of those three and legacy encodings for generations of legacy equipment. This soapbox will discuss how to describe BNR encoding in a way that aligns with the ARINC 429 specification.