Agilent/Keysight M9378A

The M9378A is a PXIe network analyzer directional coupler module designed for integration within the M9485A PXIe Multiport Vector Network Analyzer system. Operating across 50 MHz to 9 GHz, this component provides directional coupling with a built-in 20 dB attenuator and works in concert with the M9377A PXIe network analyzer direct access receiver to enable multiport vector network analysis in a modular PXIe architecture.

– Technical Specifications

• Frequency Range: 50 MHz to 9 GHz
• Directivity: 10 dB minimum @ 50 MHz to 6 GHz
• Coupling Factor: −13.5 dB to −19.5 dB @ 800 MHz to 9 GHz
• Insertion Loss: 1.5 dB to 3.5 dB @ 50 MHz to 9 GHz
• Integrated Attenuator: 20 dB

– Key Features

• Directional coupling architecture optimized for multiport network analysis
• Modular PXIe form factor enables flexible system configuration
• Frequency coverage spanning 50 MHz to 9 GHz in a single module
• Controlled coupling factor across the 800 MHz to 9 GHz band with −13.5 dB to −19.5 dB range
• Minimal insertion loss variation (1.5 dB to 3.5 dB) across full operating band

– Typical Applications

• S-parameter and multiport network characterization
• Component and device measurement under controlled coupling conditions
• Integration into automated test systems for RF and microwave circuits
• Laboratory and production network analysis where modular architecture is required

– Compatibility & Integration

The M9378A operates as a component of the M9485A PXIe Multiport Vector Network Analyzer ecosystem. Pairing with the M9377A PXIe network analyzer direct access receiver enables complete measurement capability. The modular design supports system expansion and reconfiguration to match evolving test requirements.