Agilent/Keysight 85131A

The Agilent/Keysight 85131A is an adapter set that interfaces network analyzer test ports with devices under test utilizing PSC-3.5 mm connectors. This two-piece set enables connection between male NMD-3.5 mm test ports on network analyzers and PSC-3.5 mm connector equipped DUTs, protecting the analyzer’s test port while establishing a dependable measurement interface.

– Technical Specifications

• Frequency Range: DC to 26.5 GHz
• Return Loss: 26 dB or better
• Connector Configuration:
– 2.4 mm to PSC-3.5 mm male adapter
– 2.4 mm to PSC-3.5 mm female adapter
• Connector Architecture: PSC (Precision Slotless Connector) design provides metrology-grade performance with superior electrical characteristics, repeatability, and durability versus slotted connector alternatives. Female NMD connectors mate only with male NMD test ports; male NMD connectors feature both enlarged threads for test port adapters and standard threads for direct DUT coupling.

– Key Features

• Dual-adapter configuration accommodates both male and female DUT connections
• PSC connector grade ensures measurement integrity across the DC to 26.5 GHz operating band
• Return loss performance of 26 dB or better minimizes reflection losses and measurement uncertainty
• Thread design flexibility on male adapters enables test port attachment or direct DUT mating

– Typical Applications

• S-parameter measurement of devices with PSC-3.5 mm connectors
• Network analyzer test port extension and DUT interface
• Precision microwave and RF component characterization
• Calibration and verification of high-frequency test systems

– Compatibility & Integration

Designed exclusively for network analyzers with male NMD-3.5 mm test ports. The 85131A converts the analyzer test port interface to accept PSC-3.5 mm equipped DUTs, enabling measurements from DC through 26.5 GHz without modification to existing test equipment or measurement setup.