USRP X4xx, Ethernet PCI Express Interface Connectivity Kit—The 100 GB Ethernet Connectivity Kit includes a dual 100 GbE PCI Express Gen3 x8 adapter card and a 3 m QSFP28 cable. This kit provides high-bandwidth Ethernet-based connectivity with up to 100 Gb/s data rates between a compatible desktop PC and a supported Ettus USRP X4xx series software defined radio device. The included PCI Express interface adapter supports backwards compatibility to 10 GbE through one channel on each QSFP28 port. Additionally, the 100 GB Ethernet Connectivity Kit features compatibility with industry-standard network and automatic cable polarity detection.