. ARINC Specifications Define the physical packaging or mounting of avionics. At the physical layer, it features communication of data words over unidirectional, two-wire, bipolar electrical interface. The A429USB receiver is a self-contained interface for recording ARINC 429 avionics data in real time. In the case of a timeout, or if any of the input labels are received with. . It enables the acquisition and stimulation of each received bit of any label SDI at both HIGH SPEED que LOW SPEED in real time on his RX line. 0 VDC (A to B) Output Impedance 75 Ohms Display Format Hexadecimal.