Agilent/Keysight E5081A

The Keysight E5081A ENA-X is a vector network analyzer engineered for RF component and circuit characterization across 5G and satellite communication applications. This instrument consolidates multiple measurement functions into a single platform, delivering high accuracy and repeatability while reducing test cycle time and minimizing error sources. Available in 2-port and 4-port configurations with frequency coverage from 9 kHz to 44 GHz (extendable to 54 GHz), the E5081A provides dynamic range up to 173 dB and integrates modulation distortion analysis, spectrum analysis, and noise figure measurement capabilities.

Technical Specifications

• Frequency Range: 9 kHz to 20 GHz, 10 MHz to 44 GHz, or extended to 54 GHz depending on configuration


• Port Configuration: 2-port or 4-port options; 4-port models available with integrated second source and upconverter for modulation distortion measurements


• Port Connectors: 2.4 mm and 3.5 mm male


• Port Impedance: 50 Ω


• Dynamic Range: 112 dB to 173 dB (system dynamic range defined as source maximum output power minus receiver noise floor)


• Noise Floor: -114 dBm to -59 dBm


• Power Sweep Range: -80 dBm to 19 dBm


• Directivity: 36 dB to 42 dB


• IF Bandwidth: 10 Hz


• Harmonics: -50 dBc to -25 dBc


• Linearity: ±0.2 dB to ±2 dB

Key Features

• Modulation distortion measurements to 44 GHz including Error Vector Magnitude (EVM) and Adjacent Channel Power (ACPR)


• Integrated spectrum analysis with software enablement options


• Noise figure measurement capability with wideband and noise-power options


• Direct receiver access for high-power testing with external amplifiers, attenuators, or directional couplers


• Vector-corrected calibration with full correction at the DUT plane


• Spectral correlation technique for direct frequency-domain analysis of modulated signals


• Built-in low-noise receivers

Typical Applications

• Component characterization under complex modulation schemes


• 5G and satellite communication RF testing


• Modulation quality assessment


• High-sensitivity receiver measurements

Compatibility & Integration The E5081A supports direct receiver access architecture enabling integration with external signal conditioning and amplification equipment. Specific configurations such as the E5081A-4N6 provide integrated second source and upconverter functionality for advanced modulation distortion analysis.