As Avionics buses on military and commercial aircraft become more varied and complex, a bus analyzer has become an important tool for use during integration, validation, deployment, and maintenance of avionics systems. Today's aricraft may contain MIL-STD-1553, ARINC 429, CAN, or ARINC 664 (AFDX) buses as part of the overall system. Choosing an analyzer needs to be a part of the overall system integration and test plan from the earliest phase of the project.