The Tektronix VX4320 is a high-performance RF switching module designed for integration into VXIbus systems. This single-wide, C-size VXI module provides eight independent 1×4 coaxial switches for automated RF signal routing and multiplexing up to 1.3 GHz. Each switching section features five Type SMB male snap-on subminiature coaxial connectors with 50 ohm characteristic impedance, enabling flexible signal path configuration across complex test environments.
The module operates as a local bus relay slave in standalone configuration, or with the optional Option 01 VXI Interface daughter board, it provides direct programmability via SCPI-compatible commands over VXI word serial protocol. The Option 01 daughter board also enables management of multiple relay modules within a single VXI chassis. The VX4320 communicates across the VXIbus backplane and supports VMEbus interrupt generation with selectable interrupt levels 1–7 (levels 0 or 8 disable interrupts).
Technical Specifications
• Form Factor: Single-wide, C-size VXIbus module
• Switching Configuration: Eight (8) 1×4 coaxial switches
• Characteristic Impedance: 50 Ohms
• RF Frequency Range: Up to 1.3 GHz (usable to 2 GHz)
• RF Connectors: Type SMB male snap-on subminiature coaxial (five per 1×4 section)
• Control Interface: VXI word serial protocol (with Option 01 daughter board); local bus relay slave operation (without Option 01)
• Command Protocol: SCPI-compatible (Option 01 required)
• Interrupts: VMEbus Interrupt Level Select (1–7 enabled; 0 or 8 disabled)
• Power: Supplied by VXIbus mainframe; SYSFAIL* managed by mainframe except during +5V loss
– Key Features
• Eight independent 1×4 multiplexing sections for simultaneous multi-path RF signal switching
• 50 ohm impedance matching across all coaxial paths
• Direct VXI integration via word serial protocol when equipped with Option 01
• VMEbus interrupt capability for event-driven test sequencing
• Installable in any C- or D-size VXIbus mainframe slot except slot 0
– Typical Applications
• RF and microwave signal routing in automated test systems
• Multi-channel high-frequency signal multiplexing
• Complex signal path configuration in integrated VXI test benches
– Compatibility & Integration
Fully compliant with VXIbus Specification. Integrates with VXIbus mainframes via the backplane P2 local bus. Option 01 daughter board enables networked control of multiple relay modules within a single chassis.
