The Keysight (Agilent) L4491A is a 4U rack-mountable RF/microwave switch platform that serves as a scalable chassis for building custom signal routing matrices. It accommodates a wide range of RF and microwave switches and attenuators, supporting configurations of up to 48 SPDT switches, 16 multiport switches, or combinations thereof. The platform integrates 64 coil drive lines standard, expandable to 128 with Option 002, and provides access to 5 V, 12 V, and 24 V power supplies for auxiliary device control. LXI Class C compliance via Ethernet connectivity enables integration into modern automated test and measurement systems.
Technical Specifications
• Chassis: 4U rack-mountable form factor with vertical mounting system for switches and attenuators
• Coil Drive Lines: 64 standard; expandable to 128 with Option 002
• Power Supply Access: 5 V, 12 V, and 24 V outputs available
• Digital I/O & Relay Drives: Option 004 provides 16 digital I/O lines and 28 additional relay drive lines
• Connectivity: LXI Class C via Ethernet
– Key Features
• Customizable front and rear panels for RF connectors, LEDs, and signal routing components
• Removable top, bottom, front, and rear panels for easy access, customization, and service
• Distribution board interfacing (Y1150A–Y1155A series) provides power and control signal distribution via standard ribbon cables
• Supports direct control and monitoring of Keysight RF/microwave switches and attenuators
– Supported Components
The L4491A is optimized for Keysight’s RF/microwave switch and attenuator families, including:
• N181x/U9397x and 8762/3/4 Series SPDT switches
• 8765x coaxial switches
• 8766x/8767x/8768x, 87104x/106x/L710xx/L720xx, 87204x/206x multiport switches
• 87406x and 87606x Series matrix switches
• 87222x/L7222 transfer switches
– Typical Applications
Wireless communications, avionics, medical electronics, and general automated test and measurement environments.
