The DT600 is a combination ARINC 429/629 databus analyzer with independent ports for each bus which operate independently of each other. Each bus provides basic receive and transmit function, a general record mode and a robust breakpoint mode. The RS-232 port is used to download real time data and upload label and word definitions, and the DAC port is used to provide a trigger pulse or drive recorders or instruments. An optional GPIB port can be added to provide remote control access and PC software is available which allows the user to define their own date definition table(s).