Created for functional and RF design validation in 4G era and beyond, E7515A UXM supports downlink 4CC1, 256 QAM, and LTE-U with up to 3 unlicensed carriers, as well as FDD-TDD mixed CA and uplink intra- and inter-band CA measurements. System also supports 3GPP category 0 for low-power M2M devices. With W-CDMA/HSPA+ capabilities, UXM enables 3G data throughput testing with integrated fading and CPC statistics, inter-RAT mobility and handover verification, and time-aligned multi-format logging.