Agilent / Keysight 85131E Flexible Cable, 3.5 mm (Test Port) to 3.5 mm

The Keysight 85131E is a flexible test cable engineered for precision RF signal transmission in network analyzer setups. It connects a 3.5 mm female Test Port (designed for Keysight network analyzer test ports) to a PSC-3.5 mm female connector for device under test (DUT) attachment. At 96.5 cm length, this cable delivers low insertion loss and excellent phase repeatability across repeated test cycles, making it essential for production, metrology, and research environments operating from DC to 26.5 GHz.

– Technical Specifications

• Frequency Range: DC to 26.5 GHz
• Cable Length: 96.5 cm (38 inches)
• Connectors: 3.5 mm female (Test Port) to PSC-3.5 mm female
• Insertion Loss (Test Port Connector): 0.35 × √f + 0.3 dB (f in GHz)
• Insertion Loss (Device Connector): 2.1 dB maximum at 26.5 GHz
• Return Loss: ≥16 dB
• SWR: ≤1.38
• Phase Stability: <0.22 dB (90-degree bend, 4 to 3 inch radius)
• Phase vs. Frequency: 0.16 × f + 0.8 degrees (f in GHz)

– Key Features

• Specialized rugged 3.5 mm female Test Port connector—engineered for network analyzer test ports and incompatible with standard male connectors
• PSC-3.5 mm female device connector mates with standard 3.5 mm male connectors
• Operates reliably at +20 °C to +26 °C; stores from −40 °C to +75 °C
• Rated for altitudes to 4,500 meters in operation and storage
• Handles up to 80% relative humidity (non-condensing) during operation
• Fragile center conductor requires careful handling—avoid tight coiling, excessive bending, and vertical suspension

– Typical Applications

• DUT connection in production test environments
• Precision metrology measurements
• Research and development RF testing
• Network analyzer test port connections requiring phase stability and low loss

– Compatibility & Integration

Designed exclusively for Keysight network analyzers equipped with male NMD-3.5 mm test ports. The Test Port connector does not mate with standard male connectors; the device-end PSC-3.5 mm female connector accommodates standard 3.5 mm male connectors on DUTs and auxiliary equipment.