Tektronix / CDS 73A-851 VME/VXI to VXI Adapter Module

The Tektronix/CDS 73A-851 VME/VXI to VXI Adapter Module bridges VME and VXI bus architectures, enabling integration of VME modules within VXI mainframes. This C-size VXIbus instrument module buffers and routes VME address, data, and control signals while preserving VMEbus environment, timing, and backplane integrity. A single adapter slot accommodates A or B size VME modules or A or B size VXIbus modules in any C- or D-size VXIbus mainframe slot except Slot 0.

– Technical Specifications

• Form Factor: C-size VXIbus instrument module
• Module Installation: Single slot in VXI mainframe (any position except Slot 0)
• Supported Module Sizes: A or B size VME modules; A or B size VXIbus modules
• VME Transfer Support: D8, D16, D32, and D64 transfers
• Interrupt Levels: Seven levels (IRQ1 through IRQ7) with Interrupt Select switch per level
• TTL Triggers: Eight lines (TTLTRG0–TTLTRG7) with Direction switch per line
• ECL Triggers: Two lines (ECLTRG0, ECLTRG1) with Direction switch per line
• Signal Handling: Detects installed module bus master/slave mode; transceives signals accordingly
• Buffered Lines: Data, access, and trigger lines (TTL and ECL)
• Power Interface: VXI P2 connector providing +5 V, –5.2 V, –2 V, +24 V, and –24 V per VXIbus specifications
• Firmware Version: 1.00 and above

– Key Features

• Mounts VME module front panel flush with adapter front face
• Direct access to VME module front panel I/O connections
• Buffered address and data bus routing preserves timing and signal integrity
• Automatic master/slave detection eliminates manual configuration
• Individual control switches for interrupt and trigger signal direction

– Compatibility & Integration

Installs in any C- or D-size VXI mainframe except Slot 0. Supports legacy VME hardware migration into VXI environments. Compatible with VME devices employing D8, D16, D32, and D64 data transfers. Caution: Application of P2 connector voltages to a VME module may cause severe damage.