Agilent / Keysight 85519A 4-in-1 OSLT Calibration Kit, DC to 18 GHz, Type-N (f) 50 ohm

The Agilent/Keysight 85519A is a 4-in-1 OSLT mechanical calibration kit that delivers open, short, load, and through standards for accurate VNA calibration across DC to 18 GHz. Built with Type-N female connectors and 50-ohm impedance, this kit enables precise compensation of systematic errors in RF and microwave test systems. Its compact form factor and lightweight design support field and laboratory deployment.

The integrated through standard uniquely facilitates calibration of non-insertable devices - such as female-female connectors on cables and filters - without requiring adapter configurations.

Technical Specifications

Frequency Range: DC to 18 GHz Impedance: 50 ohm Connector Interface: Type-N female Open Phase Error:

• 0 to 6 GHz: ≤ 2.0°


• 6 to 9 GHz: ≤ 3.0°


• 9 to 18 GHz: ≤ 4.0° Short Phase Error:


• 0 to 6 GHz: ≤ 1.5°


• 6 to 9 GHz: ≤ 2.5°


• 9 to 18 GHz: ≤ 3.0° Load Return Loss:


• 0 to 6 GHz: ≥ 42 dB


• 6 to 9 GHz: ≥ 35 dB


• 9 to 18 GHz: ≥ 32 dB Physical Dimensions: 121 mm (H) × 89 mm (W) × 22 mm (D)

Key Features

• Four-standard OSLT architecture for single-port and two-port calibration methodologies


• Mechanical construction ensures repeatability and minimal drift over extended use cycles


• Female-to-female connector design eliminates need for external adapters in common test configurations


• Frequency coverage from DC through 18 GHz with controlled phase and return loss performance

Typical Applications

• Vector network analyzer calibration and verification


• RF and microwave measurement system error correction


• S-parameter characterization of passive components


• Cable and filter assembly validation

Compatibility & Integration Designed for integration with Keysight network analyzers and compatible third-party RF instrumentation supporting Type-N female connectors and 50-ohm measurement environments.