The Tektronix VX4286 is a 32-channel analog/digital input module for VXIbus data acquisition systems. It delivers flexible input configuration—32 digital inputs, 32 time-tagged comparator inputs, or 16 analog plus 16 digital channels in combination mode. Each channel features individually programmable threshold voltages with selectable ranges: ±10V (40mV accuracy, 5mV resolution) or ±50V (100mV accuracy, 25mV resolution). Auto-ranging dynamically selects the optimal threshold range. Logic polarity is independently selectable per channel for active high or active low operation. The module integrates input signal conditioning including open-collector pullups and AC detection, with accommodation for user-designed input circuitry. A front panel display highlights channels exceeding their programmed thresholds.
Technical Specifications
• Architecture: 32-channel analog/digital input module
• Form Factor: Single-width, C-size printed circuit board assembly
• Input Configurations: 32 digital inputs; 32 comparator inputs with time-tagging; or 16 analog + 16 digital hybrid mode
• Threshold Voltage Ranges:
– Range 1: ±10V (40mV accuracy, 5mV resolution)
– Range 2: ±50V (100mV accuracy, 25mV resolution)
• Threshold Programming: Individual per-channel threshold setting with active high/active low logic selection
• Auto-Ranging: Automatic range selection for specified threshold voltages
– Key Features
• Per-channel programmable threshold voltages with dual-range capability
• Time-tagged comparator mode for temporal event correlation
• Front panel threshold status indication
• Input signal conditioning: pullups for open-collector outputs, AC detection capability
• Support for user-designed input conditioning circuitry
• Independent logic polarity configuration per channel
– Compatibility & Integration
The VX4286 integrates into C-size or larger VXIbus mainframes via standard VXIbus interface. Operation requires firmware version 1.00 and above.
