Agilent / Keysight 85131F Flexible Cable Set, 3.5 mm (Test Port) to 3.5 mm to 26.5 GHz

The Keysight 85131F Flexible Cable Set provides precision interconnection for network analyzer test ports operating across DC to 26.5 GHz. This two-cable assembly connects devices under test between standardized 3.5 mm connectors, delivering controlled electrical performance in high-frequency measurement setups.

– Technical Specifications

• Frequency Range: DC to 26.5 GHz
• Cable Length: 62.2 cm (24.5 inches) per cable
• Return Loss: ≥16 dB
• Insertion Loss (Test Port): 0.25 × √f + 0.2 dB (f in GHz)
• Insertion Loss (Device Connector): 1.5 dB maximum at 26.5 GHz
• Phase Stability: ≤0.12 dB with 90° bend at 3–4 inch radius
• Phase Change: 0.13 × f + 0.5 degrees (f in GHz)

– Key Features

• Two flexible cables optimized for DUT connection between test ports
• PSC (Precision Slotless Connector) technology on test port end—enhances repeatability and durability versus standard slotted connectors
• 3.5 mm female PSC connector mates with male NMD-3.5 mm test ports; not compatible with standard male 3.5 mm connectors
• Device end terminates in 3.5 mm female-to-male configuration
• Electrical performance and cable stability specified at 25 °C ±5 °C after 90 minutes thermal stabilization

– Typical Applications

• Network analyzer S-parameter and impedance measurements
• RF and microwave device characterization to 26.5 GHz
• Precision test setups requiring controlled phase and insertion loss

– Compatibility & Integration

Designed for network analyzers featuring male NMD-3.5 mm test ports. The rugged PSC female connector on the test port end is purpose-built for analyzer test points and will not mate with standard male connectors. The two-cable configuration allows the DUT to be suspended or mounted between cable terminations.