Over on GitHub, user acruxcz has released the TRNXSDR-carrier, an open hardware baseboard platform designed to host and interconnect multiple SDR modules. The board is built around a Xilinx XC7Z015 FPGA with 1 GB of DDR3 RAM at 1066 MHz, and features four SMA RF connectors, Gigabit Ethernet, an SFP optical port (with GTX support planned for up to 5 Gbit throughput), and USB-C with Power Delivery. It is not a standalone SDR, instead it acts as a central hub that requires external SDR modules connected via its expansion slots.

The slot system is a defining feature. The baseboard provides two high-speed primary slots (one with JESD204B support via GTX), two lower-speed primary slots, and room for an expansion board adding a further six slots and ten module positions in total. Planned RF modules include Lime Microsystems LMS6002D and LMS7002M chips, as well as Analog Devices AD9361/AD9363/AD9364 transceivers. A custom GNU Radio OOT source block is already functional, and initial RX testing at 433 MHz shows a clean signal with minimal noise floor. SoapySDR driver support, which would bring compatibility with SDR++, SDRangel, and other tools, is planned.

The hardware design is at Rev 1.0 with a Rev 2.0 in progress to address known bugs. The project is actively under development. It is not yet known if the developers plan to sell hardware, or leave it as open-source plans.