The Keysight N9055EM0E is a Power Amplifier Measurement Application for X-Series signal analyzers that characterizes PA performance through Digital Pre-Distortion (DPD) analysis and linearization. It integrates DPD models—Look-up Table, Volterra Series, Memory Polynomial, and Iterative Learning Control—with user-defined MATLAB script support. The application measures AM/AM, AM/PM, Adjacent Channel Power, Delta EVM, and Demodulated EVM across 5G NR, LTE FDD, and 802.11ac/ax/be standards, with simultaneous Pre-DPD and Post-DPD result comparison on a single screen.
– Technical Specifications
• Frequency range: Up to 44 GHz (with compatible analyzers/generators)
• Bandwidth: 2 GHz
– Key Features
• DPD model extraction and application for PA output linearization
• Multi-carrier EVM measurements and Power vs. Demod EVM analysis
• Waveform support: Keysight Signal Studio, user-defined formats (txt, csv, bin, hdf, MATLAB)
• Waveform processing with crest factor reduction via clipping & filtering or peak cancellation
• Envelope Tracking (ET) measurement capability with compatible Keysight hardware (2-channel VXG or PXI VXT and AWG)
• Reference waveform and mask signal reconstruction for PA power supply transient analysis
• Multi-touch interface for signal analyzer control
– Typical Applications
• Wideband PA characterization for 5G NR and WLAN
• DPD linearization and efficiency optimization
• Envelope Tracking PA design and validation
• Multi-carrier PA performance assessment
– Compatibility & Integration
• Runs on Keysight X-Series signal analyzers (UXA, VXG, PXA, PXE, MXA, EXA, MXE, VXT)
• N-models compatible with UXA/PXA/PXE; E-models compatible with MXA/EXA/MXE/VXT
• Smart-link integration with Keysight signal generators for automated closed-loop control and power servo adjustment
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