Keysight Technologies, Inc. today introduced a multi-channel phase coherent M9391A PXIe vector signal analyzer and M9381A PXIe vector signal generator for characterization and test of the latest wireless designs requiring multiple time-synchronized or phase coherent channels. These new capabilities address rapidly evolving wireless technology challenges, including the ability to validate critical multi-antenna techniques, such as diversity, carrier aggregation, 8x8 multiple-input, multiple-output spatial multiplexing and beamforming, used in the development and verification of next generation cellular, wireless connectivity and 5G devices.