The VXI Technology 4016 (VM4016) is a VXIbus message-based analog comparator module delivering 16 true differential input channels for automated test systems. Each channel monitors voltage levels against software-defined thresholds or windows, generating VXIbus or front panel interrupts on exceedance to enable go/no-go testing, threshold monitoring, and automated shutdown control. The module supports both message-based word serial and register-based data access with full SCPI and IEEE-488.2 compatibility.
Technical Specifications
Analog Comparator Inputs
• 16 true differential channels per module
• Input ranges: ±10 V or ±100 V (selectable via 1× or 0.1× differential amplifier gain)
• Input impedance: 100 kΩ single-ended
• Programmable threshold and polarity (normal or inverted) per channel
• Input masking and channel combining for selective interrupt generation
Interrupt and Status Handling
• VXIbus or front panel interrupt output
• Raw data, status, and first latched interrupt registers at defined logical addresses
• Debounced input state reporting with masked and inverted status tracking
• Active high logic state indication for each channel
Data Access and Programming
• Message-based word serial interface for programming and data movement
• Register-based direct access to user-definable VXI registers for high-speed throughput
• SCPI and IEEE-488.2 command compatibility
• Independently programmable per-channel configuration
– Key Features
• True differential analog comparison eliminates common-mode signal noise
• Flexible threshold windows accommodate complex test criteria
• Channel masking reduces interrupt overhead in high-density applications
• Dual data access modes optimize for either messaging bandwidth or register speed
• VXIplug&play support for plug-and-play system configuration
– Typical Applications
• Go/no-go voltage level testing in manufacturing and functional test
• Real-time threshold and window monitoring for process control
• Automated shutdown triggering on out-of-spec signal conditions
• Multi-channel voltage surveillance in production test systems
– Compatibility & Integration
The VM4016 integrates within VMIP™ (VXI Modular Instrumentation Platform) family modules, enabling up to 48 differential channels per single VXIbus C-size slot. Message-based and register-based interfaces ensure compatibility with diverse VXI system architectures and software frameworks.
