Ametek / VTI Instruments / VXI Technology SM1000A Single-Slot Base Unit

The Ametek/VTI Instruments SM1000A is a single-slot VXI base unit engineered for high-density modular switching applications. This platform accommodates up to two SMIP (Switch Modularity and Interface Platform) switch modules, configure customized switching solutions by mixing different module types

RF, matrices, power, multiplexers, and general-purpose switches. The unit integrates directly into VXIbus mainframes, optimizing space while preserving signal integrity across DC to RF frequencies.

Technical Specifications

• Single-slot VXI mainframe footprint


• Supports up to two high-density SMIP switch modules


• Multi-layer PCB design with extensive ground planes and shielding


• Signal ground planes isolated from control circuit grounds


• Frequency range: DC to RF Control & Switching Performance


• Direct register access for all relays, maximizing switching speeds


• Deep pattern memory: 1 MB scan list capacity


• Hardware-implemented break-before-make and make-before-break switching


• Backplane trigger advance for synchronized operation


• Programmable fail-safe interrupt with external or TTL backplane trigger capability


• Quiescent control circuitry reduces digital noise for low-level signal switching Signal Integrity


• Optimized relay selection for minimal crosstalk


• Crosstalk minimization through isolated signal and control ground planes


• Capable of switching low-level DC and RF signals

Key Features

• VXIbus-compatible backplane integration for power, control, and data transfer


• Flexible module mixing for application-specific configurations


• Hardware-managed switching logic reduces software overhead


• 1 MB deep scan list memory for complex switching sequences

Typical Applications RF and DC signal switching, high-density matrix configurations, automated test systems requiring synchronized relay control and pattern-based switching sequences.

Compatibility & Integration Designed for VXIbus ecosystems. Accepts all SMIP-compatible switch modules. Operates via direct register control and scan list programming with backplane trigger support.