The VXI Data Acquisition System is a modular instrumentation platform built on the VXIbus architecture—an IEEE 1155-standardized extension of VMEbus that defines mechanical, electrical, and software specifications for high-performance automated test equipment. The system integrates diverse measurement and control modules within a single mainframe, delivering scalable data acquisition for demanding test applications.
Technical Specifications
VXIbus architecture supports C-size (23.3 × 34 cm) and B-size VME (23.3 × 16 cm) module formats, with C-size cards offering the industry’s most common footprint and enhanced EMC/EMI shielding capability. The backplane uses dual connectors: P1 (mandatory, carries the data transfer bus) and P2 (expands data bus to full 32-bit width, supports 10 MHz clock bus, analog sumbus, 12-pin local bus, TTL/ECL trigger buses, and additional voltage rails including -5.2V, -2V, +/-24V).
Power delivery spans multiple rails: +5V, +/-12V, +/-24V, -5.2V, and -2V. Mainframes feature specified airflow rates (e.g., 6 litres/sec per slot) and managed pressure drops to maintain controlled module operating temperatures.
– Key Features
• Multivendor interoperability through standardized hardware and software specifications
• VXIplug&play alliance standardization for simplified system construction
• Open specification design supporting current computer technologies
• Modular and scalable architecture for evolving test requirements
• High-speed data transfer via dual-connector backplane architecture
– Typical Applications
Automated test equipment (ATE), complex data acquisition systems, and integrated measurement platforms requiring multivendor component compatibility and long-term modularity.
– Compatibility & Integration
Hardware modules from different vendors integrate into the same mainframe due to standardized mechanical and electrical specifications. IEEE 1155 adoption (March 1993) ensures industry-standard compliance and vendor independence.
