The Agilent/Keysight 11581A is a four-piece coaxial fixed attenuator set comprising Keysight 8491A units housed in a walnut accessory case. Designed for calibration laboratories and precision measurement applications, the set delivers stable, repeatable attenuation across DC to 12.4 GHz with Type-N connectors and 50 Ω impedance.
Technical Specifications
• Attenuation Values: 3 dB, 6 dB, 10 dB, 20 dB
• Connector Type: Type-N
• Frequency Range: DC to 12.4 GHz
• Characteristic Impedance: 50 Ω
• Maximum Average Input Power: 2 W
• Maximum Peak Input Power: 100 W
• Temperature Stability: 0.0001 dB/dB/°C
• Power Sensitivity: 0.001 dB/dB/W
• Operating Temperature: 0 °C to +55 °C
• Storage Temperature: −55 °C to +85 °C
– Key Features
• Four individual 8491A attenuators with discrete attenuation steps enable flexible signal conditioning in test setups.
• Type-N connector interface ensures compatibility with standard RF and microwave instrumentation.
• Minimal temperature coefficient (0.0001 dB/dB/°C) maintains attenuation accuracy across operating range.
• Low power sensitivity (0.001 dB/dB/W) minimizes nonlinear effects in precision applications.
• Walnut case protects attenuators during storage and transport.
• Calibration data traceable to National Bureau of Standards available with UK6 option; includes reflection coefficients and measurement uncertainty documentation.
– Typical Applications
• Signal conditioning and power leveling in RF and microwave test benches
• Calibration verification for RF power meters and network analyzers
• Attenuator characterization within calibration and metrology labs
• Measurement systems requiring known, stable insertion loss
– Compatibility & Integration
Type-N connectors integrate directly into coaxial test systems operating from DC through 12.4 GHz. The 50 Ω impedance matches standard RF test equipment. Individual attenuators connect in cascade or series configurations for cumulative attenuation values.
