Agilent/Keysight U2021XA

The Keysight U2021XA is a USB-powered average power sensor delivering high-speed power measurements across 50 MHz to 18 GHz. It combines the measurement capabilities of a traditional power meter with compact, portable design - ideal for R&D and manufacturing test environments where cost and efficiency matter. The sensor excels in applications spanning aerospace, defense, wireless communications (LTE, WCDMA, GSM), and WLAN systems.

Technical Specifications

Frequency Range: 50 MHz to 18 GHz Power Measurement Range:

• Average Mode: −45 dBm to +20 dBm


• Peak/Gated Average Mode: −30 dBm to +20 dBm Measurement Speed & Sampling:


• Up to 25,000 readings/second (free run/fast buffer mode)


• Single-shot real-time capture at 80 Msamples/second


• 80 Msamples/second continuous sampling rate Pulse Measurement Performance:


• Rise and fall time: ≤13 ns


• Simultaneous multi-pulse capability: up to 20 pulses


• Automatic pulse tilt (droop) measurements Signal Handling:


• Video bandwidth: 30 MHz


• Peak power, average power, gated average, and CW measurements


• Modulated signal analysis and pulse timing characterization


• Real-time measurement capability

Key Features Internal Zeroing & Calibration: Integrated DC reference source and switching circuits enable in-situ zeroing and calibration, reducing measurement uncertainty and connector wear. External Trigger In/Out: Dedicated trigger connections synchronize measurements with signal source or device under test, supporting low-level signal capture near the noise floor. Built-in Presets: Pre-configured measurement setups for radar and wireless standards

DME, GSM, EDGE, CDMA, WCDMA, WLAN, WiMAX, and LTE - accelerate test configuration. External Triggering (Average Mode): Enables synchronization with signal burst timing, controlling measurement capture of specific waveform portions.

Typical Applications Aerospace and defense RF testing, wireless communication system characterization, WLAN and cellular signal validation, and pulse radar analysis.

Compatibility & Integration The U2021XA integrates with Keysight BenchVue software via the BV0007B Power Meter/Sensor Control and Analysis app, eliminating the need for custom programming. It is compatible with Keysight network analyzers for source power calibration and maintains code compatibility with legacy Keysight power sensors.