Agilent / Keysight 85564A 3-in-1 OSL Mechanical Calibration Kit, DC to 50 GHz, 2.4 mm (m)

The Agilent/Keysight 85564A is a 3-in-1 OSL mechanical calibration kit designed for precise calibration of vector network analyzers and RF instruments operating from DC to 50 GHz. Built around 2.4 mm male connectors with 50 Ohm impedance, this kit delivers the offset open, offset short, and broadband termination standards required for accurate, repeatable measurements across the full frequency range.

Technical Specifications

• Frequency range: DC to 50 GHz


• Impedance: 50 Ohm


• Connector type: 2.4 mm male


• Load return loss: 26 to 42 dB (frequency dependent) Calibration Standards Offset Open: Inner conductor supported by low-dielectric-constant plastic minimizes compensation requirements. Pin depth is tightly controlled to reduce phase errors. Offset Short: Single-piece inner conductor design shares a common shorting plane for highly repeatable connections. Pin depth control is engineered to minimize phase errors across the band. Broadband Termination: Metrology-grade 50 Ω load optimized for 50 GHz operation. Distributed resistive element on sapphire substrate ensures excellent stability and consistent return loss performance. Mechanical Design The 85564A is compact and lightweight. Pin depth of each standard is a critical mechanical parameter that influences electrical performance; specifications account for pin depth effects.

Key Features

• Three complete calibration standards in single kit


• DC to 50 GHz frequency coverage


• Precision mechanical construction for repeatable connections


• Sapphire-substrate load element for stability


• 2.4 mm male connector interface


• Optional torque wrench included


• Adapters optional (unlike the 85056D)

Typical Applications

• VNA calibration and verification


• RF component measurement and characterization


• High-frequency network analysis up to 50 GHz

Compatibility & Integration The 85564A calibrates Keysight network analyzers rated to 50 GHz and works with any VNA or RF instrument equipped with 2.4 mm male connectors. Electrical specifications apply when connected to Keysight precision interfaces.