Agilent / Keysight 85561A 4-in-1 OSLT Mechanical Calibration Kit, DC to 40 GHz, 2.92 mm (f)

The Agilent/Keysight 85561A is a 4-in-1 OSLT mechanical calibration kit engineered for VNA calibration across DC to 40 GHz. This kIt has Open, Short, Load, and Thru standards in a compact 2.92 mm (f) connector interface, enabling precise vector network analyzer verification and RF instrument calibration across extended frequency ranges.

Technical Specifications

• Calibration Standards: Open, Short, Load, Thru (OSLT)


• Connector Type: 2.92 mm (f) female


• Characteristic Impedance: 50 Ohms


• Frequency Range: DC to 40 GHz


• Load Return Loss: 24 to 39 dB (frequency dependent)

Key Features

• Four independent calibration standards in one compact assembly


• Lightweight, portable design suitable for bench and field use


• Mechanically solid construction for repeated calibration cycles


• Precision-engineered to maintain performance across full frequency span

Typical Applications

• Network analyzer calibration and verification


• S-parameter measurement validation


• RF circuit characterization


• Impedance and reflection coefficient calibration


• Broadband RF system alignment

Compatibility & Integration The 85561A integrates with VNA systems requiring 2.92 mm female connectors and operates within the 855xxA Series family. The kit supports calibration workflows for instruments requiring OSLT reference standards across microwave and millimeter-wave frequencies. Detailed calibration procedures and performance specifications are available in Keysight technical documentation and application notes addressing calibration standards selection.