Curtiss-Wright / VMETRO VBT-321 VME Bus Tracer

The Curtiss-Wright/VMETRO VBT-321 is a single-slot VME bus tracer that captures and analyzes VME bus transactions in real time. Designed for engineers debugging and characterizing VMEbus architectures, the module provides detailed bus activity monitoring and post-capture analysis capabilities essential for system validation and performance investigation.

## Technical Specifications

**Manufacturer:** Curtiss-Wright / VMETRO
**Model:** VBT-321
**Form Factor:** Single-slot VME module
**Product Family:** VBT-321, VBT-321B, VBT-321/F, VBT-321/E

## Key Features

• Female DB-25 terminal connector for system interface
• Female DB-25 host connector for data transfer
• BNC external input for triggering and synchronization
• BNC trigger output for event signaling
• Manual reset switch accessible from front panel
• Real-time bus transaction capture and analysis
• Post-capture transaction analysis and reporting

## Typical Applications

The VBT-321 supports debug and performance analysis workflows in VMEbus system development, embedded controller validation, and board-level troubleshooting. Engineers use the module to correlate bus events with system behavior, verify protocol compliance, and identify timing anomalies across multi-master VME architectures.

## Compatibility & Integration

The VBT-321 integrates with the broader Curtiss-Wright/VMETRO VME analyzer ecosystem. Related modules include the VBT-325/VBT-325B/VBT-325C analyzers and the VPC-MkII piggyback carrier platform, which enables multi-module analysis configurations. Piggyback modules—VBAT-PB, TIM200-PB, S/TIM200-PB, VDRIVE-PB, and XMEM325-PB—expand tracing and analysis capabilities for specialized measurement requirements.