HP / Agilent 11581A Coaxial Attenuators Set

The HP/Agilent 11581A Coaxial Attenuators Set is a precision fixed-attenuator kit engineered for controlled RF signal power reduction in test and measurement applications. This four-piece set delivers discrete attenuation values—3 dB, 6 dB, 10 dB, and 20 dB—each individually calibrated and traceable to NIST standards. Type-N connectors (male/female) mate with MIL-C-71 or MIL-C-39012 interfaces, enabling direct integration into 50-ohm RF systems. Engineers rely on these attenuators to extend dynamic range, manage signal levels, and perform precision impedance matching across demanding laboratory and field deployments.

– Technical Specifications

• Attenuation Values: 3 dB, 6 dB, 10 dB, 20 dB (fixed)
• Frequency Range: DC to 12.4 GHz
• Impedance: 50 ohms
• Connector Type: Type-N male/female (MIL-C-71/MIL-C-39012 compatible)
• Average Power Handling: 2 Watts
• Continuous RF Input Power: 100 W maximum
• Accuracy: ±2% of value in dB (typical at 26.5 GHz)
• SWR: Approximately 1.15 at higher frequencies
• Calibration: Each attenuator supplied with calibration report certified to NIST, including actual attenuation and reflection coefficient data

– Key Features

• Four fixed coaxial attenuators (8491A models) in single set
• Low SWR across operating frequency band
• NIST-traceable calibration with detailed port reflection data
• Walnut accessory case for storage and transport

– Typical Applications

• Dynamic range extension for sensitive RF receivers
• Signal level conditioning in microwave test benches
• Impedance matching and source/load isolation
• Precision attenuation standards for system validation

– Compatibility & Integration

The 11581A set integrates with HP, Agilent, and Keysight RF instrumentation. Type-N connectors ensure compatibility with OSM, ARM, WPM, BRM, and NPM connector families across standard 50-ohm test systems.