The N4391A is a high end turn-key optical modulation analyzer for advanced research in single and multi-carrier 400 Gbit/s and 1Tbit/s complex modulated transmission systems. It is based on the latest Z-Series Keysight oscilloscopes, a 40 GHz dual polarization coherent receiver and optical modulation vector signal analysis software offering most flexible analysis tools and smart setup for easiest instrument setup.

Benefits

Highest confidence in test results through full calibrated turn-key solution

Widest range of modulation format offering

Based on world class Z-Series 4 channel Keysight oscilloscope

Features

Fully integrated in Vector Signal Analysis software with smart setup

Analysis software also available as PC stand-alone version

User configurable APSK and OFDM demodulator

Modulation-format transparent polarization alignment

Clearly structured measurement results

Optical characterization results for each polarization plane separately

Optical summary results for complete signal

BER and Q factor separated for each polarization plane and overall signal

Freely configurable screen layout

Internal PMF switch to select internal or external local oscillator laser for best long term test results

Free selection and sequence of DSP algorithms

Various CD and PMD compensation and measurement algorithms

Integration of user DSP algorithm with the same freedom as Keysight algorithms

4x 33 GHz system bandwidth,

4 × 40 GHz optical receiver bandwidth

Specified typical system noise floor 1.8% rms EVM

66 Gbaud symbol rate

264 Gbit/s for QPSK, 512 Gbit/s for QAM 16

Analysis span 66 GHz

Optical wavelength range 1528 nm to 1630 nm

Absolute wavelength accuracy +/- 5 pm typical

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