The Quartz Model 5550 is an eight-channel A/D and D/A converter, 3U OpenVPX board based on the Xilinx Zynq UltraScale+ RFSoC and aligned to the SOSA™ Technical Standard. It is ideal for many communications, electro-optical, electronic warfare, radar, and signals intelligence applications. A key development breakthrough was the decision to implement connector technology that enables one of the major goals of SOSA reference architecture—backplane only I/O. Model 5550 incorporates the ANSI/VITA 67.3D VPX Backplane Interconnect standard for both coaxial RF and optical I/O. In addition, the board includes a 40GigE interface and a shelf-management sub-system that are also required in the SOSA reference architecture.