Why does an SDI hardware failure occur in single‑rate HD‑SDI parallel loopback without an external VCXO at 1280×720p24 across all FPGA device families? - Why does an SDI hardware failure occur in single‑rate HD‑SDI parallel loopback without an external VCXO at 1280×720p24 across all FPGA device families? Description Due to an issue in Quartus® Prime Pro Edition Software version 26.1 and earlier, an SDI hardware failure may be observed when using the Single‑Rate HD‑SDI Parallel Loopback design without an external VCXO and selecting the 1280 × 720p24 video standard on all SDI‑supported FPGA device families. This issue does not affect multi‑rate or triple‑rate HD modes. Resolution This issue is scheduled to be fixed in a future release of the Quartus® Prime Pro Edition Software. For users who must remain on Quartus® version 26.1 or earlier, use the following workaround: Regenerate the design using Quartus® Prime Pro Edition Software version 26.1.1 or later. In your target project, replace the entire pfd folder with the corresponding folder from the newly generated design. The updated PFD module can be found at: <Your_Design_Folder>/rtl/loopback/pfd Custom Fields values: ['novalue'] Troubleshooting QS-48584 novalue ['Interfaces Audio/Video SDI II (Primary)'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 26.1 ['Agilex™ 3 FPGAs and SoCs', 'Agilex™ 5 FPGAs and SoCs', 'Agilex™ 7 FPGAs and SoCs', 'Agilex™ 9 FPGA Direct RF-Series', 'Agilex™ 9 FPGAs and SoCs', 'Arria® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']