The Keysight L4445A Microwave Switch/Attenuator Driver is an LXI Class C compliant instrument that controls external microwave switches, attenuators, and signal routing devices in automated test systems. It provides digital outputs for switch and attenuator control, digital inputs for switch position read-back, and Ethernet connectivity for remote operation via web browser interface. The compact design enables flexible placement near the device under test while minimizing signal path degradation.
Technical Specifications
• Control outputs for external switches and attenuators
• Digital inputs for switch position read-back feedback
• LXI Class C compliant Ethernet connectivity
• Optional GPIB interface for legacy system integration
• Single 34945EXT extender capability (first unit powered by L4445A)
• Supports up to seven additional 34945EXT extenders with user-supplied power
• Maximum expandable capacity: 64 switch coils (equivalent to 32 SPDT switches)
• Sequential and simultaneous switching operation modes
– Key Features
• Web-based graphical interface for remote setup, troubleshooting, and maintenance
• Switch channel configuration and control via web interface
• SCPI command support through web interface
• Switch sequence definition and storage
• Error queue and status report viewing
• Password protection and LAN lockout security features
• LED drive capability for switch position indication
• Distribution board support for common microwave switches and attenuators (Y1150A–Y1155A series)
• Power and control signal routing through distribution boards
– Software Support
• Keysight E2094 I/O Libraries Suite included
• Keysight T&M Toolkit for Microsoft Visual Studio.NET and Keysight VEE Pro
• National Instruments LabVIEW, LabWindows/CVI, TestStand, and Switch Manager drivers
• Microsoft C/C++ and Visual Basic compatibility
– Compatibility & Integration
The L4445A integrates into existing test systems via built-in Ethernet or optional GPIB. External power supply connection to 34945EXT extenders enables faster simultaneous switching operations. Distribution boards facilitate connections to standard microwave switch and attenuator hardware while managing signal routing and power distribution.
