Agilent / Keysight 85518A 4-in-1 OSLT Mechanical Calibration Kit, DC to 18 GHz, Type-N (m) 50 ohm

The Agilent/Keysight 85518A is a 4-in-1 OSLT mechanical calibration kit designed for precision network analyzer calibration across DC to 18 GHz. It has open, short, load, and thru standards with Type-N male connectors and 50 ohm impedance, enabling accurate error correction and characterized measurements in RF and microwave test environments.

Technical Specifications

• Frequency Range: DC to 18 GHz


• Connector Type: Type-N male, 50 ohm


• Calibration Standards: Open, Short, Load, Thru (4-in-1)


• Physical Dimensions: 106 × 72 × 22 mm (H × W × D)


• Weight: Approximately 2 lbs


• Operating Temperature: +18 °C to +28 °C


• Storage Temperature: −40 °C to +70 °C Open Phase Error:


• 0–6 GHz: ≤ 2.0°


• 6–9 GHz: ≤ 3.0°


• 9–18 GHz: ≤ 4.0° Short Phase Error:


• 0–6 GHz: ≤ 1.5°


• 6–9 GHz: ≤ 2.5°


• 9–18 GHz: ≤ 3.0° Load Return Loss:


• 0–6 GHz: ≥ 42 dB


• 6–9 GHz: ≥ 35 dB


• 9–18 GHz: ≥ 32 dB Through Return Loss (typical):


• DC–4 GHz: ≥ 38 dB


• 4–8 GHz: ≥ 34 dB


• 8–18 GHz: ≥ 28 dB Through Electrical Delay: 245.383 ps (male-male)

Through Insertion Loss (typical): ≤ 0.035 dB × √(f/GHz) (DC to 18 GHz, male-male)
Offset Delay (Open, male): 85.954 ps

Key Features

• Compact, lightweight design for laboratory and field deployment


• Integrated thru standard enables calibration of non-insertable devices such as cables and filters with male-male connectors


• All four OSLT standards included for complete error correction


• Type-N male connectors ensure compatibility with standard RF and microwave equipment


• Protective storage recommended to maintain precision performance and connector integrity

Typical Applications

• Network analyzer calibration and error correction


• RF and microwave measurement verification


• Cable and filter device characterization


• Precision test system validation across DC to 18 GHz

Compatibility & Integration The 85518A interfaces with Agilent/Keysight network analyzers and compatible third-party RF instrumentation equipped with Type-N male connectors. The male-male thru configuration supports direct connection to test ports and external devices without adapter requirements.