Agilent/Keysight 85515A

The Agilent/Keysight 85515A is a 4-in-1 OSLT (Open, Short, Load, Through) mechanical calibration kit for RF and microwave measurements from DC to 9 GHz. Designed with Type-N female connectors and 50 Ohm impedance, this kIt has precise calibration standards essential for spectrum analyzer characterization and signal integrity verification across the measurement chain.

Technical Specifications

• Open: Phase error ≤ 2.0° (DC to 4 GHz), ≤ 3.0° (4 to 9 GHz); offset delay 53.531 ps


• Short: Phase error ≤ 1.25° (DC to 9 GHz); offset delay coefficients per datasheet


• Load: Return loss ≥ 42 dB (DC to 6 GHz), ≥ 35 dB (6 to 9 GHz); DC resistance 50 Ω ± 0.5 Ω; maximum power 0.5 W


• Through (Female-Female): Insertion loss ≤ 0.05 dB (DC to 4 GHz), ≤ 0.1 dB (4 to 9 GHz); return loss ≥ 36 dB (DC to 4 GHz), ≥ 31 dB (4 to 8 GHz), ≥ 28 dB (8 to 9 GHz); electrical delay 241.167 ps Physical Specifications


• Frequency range: DC to 9 GHz


• Impedance: 50 Ohm


• Connector type: Type-N (Female), 5 ports


• Dimensions: Approximately 104 × 74 × 22 mm


• Operating temperature: +5 °C to +40 °C


• Storage temperature: −40 °C to +70 °C

Key Features

• Four-in-one calibration standard set eliminates need for separate instruments


• Low insertion loss and controlled return loss across full frequency band


• Tight phase error specifications enable high-accuracy network parameter extraction


• Compact form factor with lightweight construction


• Female-to-female through standard provides direct signal path integration

Typical Applications

• Spectrum analyzer calibration and verification


• Network analyzer error correction


• RF measurement system qualification


• Periodic calibration interval validation

Compatibility & Integration The 85515A integrates directly into Agilent/Keysight spectrum analyzer systems. Recommended maintenance includes annual inspection intervals and 12 lb-inch (136 N-cm) torque specification for connector assembly. Store with protective caps on all connectors in shock-resistant environment.