The Keysight (Agilent) L4490A is a 2U RF/microwave switch platform that provides flexible signal routing and matrix configuration for RF and microwave testing applications. The system integrates power delivery and control signaling for custom switch and attenuator matrices, supporting configurations from simple SPDT arrangements to complex multiport switching topologies. Its modular architecture accepts a range of Keysight RF/microwave components, reducing design time while maintaining signal integrity across R&D, manufacturing, wireless communications, avionics, and medical electronics test environments.
Technical Specifications
Form Factor & Physical
• 2U height, full rack width with standard mount kits
• Customizable front and rear panels for RF connectors, LEDs, and auxiliary components
• Removable top, bottom, front, and rear panels for service access
• Switches replaceable from unit bottom without RF cable disturbance
• 3D models provided (DXF, STP, IGS formats) for cable routing and documentation
Control Architecture
• Standard 64 switch coil drive lines (expandable to 128 with Option 002)
• Supports up to 32 standard SPDT switches or 8 multiport switch configurations
• Option 004 adds 16 digital I/O lines and 28 additional relay drive lines
• Digital inputs for switch position readback
• Digital outputs for position indicator LEDs
• Distribution boards with standard ribbon cable connectivity
Power & Connectivity
• Auxiliary power outputs: 5 V, 12 V, and 24 V
• LAN and GPIB interfaces
• LXI-compliant with integrated Ethernet and graphical web interface
• Switch verification, sequence control, and relay counting functions
Frequency Support
• Accommodates switches rated to 50 GHz
– Key Features
• Modular design accepts multiple switch and attenuator types
• Web-based configuration and troubleshooting interface
• Integrated power and control signal distribution
• Expandable architecture for increased switching capacity
• Relay drive and digital I/O expansion options available
– Typical Applications
• Wireless communication RF testing and validation
• Avionics system signal routing and verification
• Medical electronics component characterization
• Manufacturing test matrix automation
• R&D switching and multiplexing solutions
– Compatibility & Integration
Optimized for Keysight family RF/microwave switches and attenuators. LXI compliance enables direct integration into networked test environments with standard Ethernet control and monitoring.
