Why do I observe a bit mismatch on RX parallel data for the GTS CPRI PHY IP when selecting CPRI rates of 9.8 Gbps, 6 Gbps, or 2.4 Gbps? - Why do I observe a bit mismatch on RX parallel data for the GTS CPRI PHY IP when selecting CPRI rates of 9.8 Gbps, 6 Gbps, or 2.4 Gbps? Description Due to an issue with the FastSim model in Quartus® Prime Pro Edition software version 25.3.1, selecting CPRI speeds of 9.8 Gbps, 6 Gbps, or 2.4 Gbps may result in a bit mismatch on the RX parallel data. Resolution To work around this issue, comment out the following line in the files run_riviera.do , run_vcsmx.sh , and run_vsim.do located in the generated example design example_testbench folder: FAST_SIM_OPTIONS="+define+IP7521SERDES_UX_SIMSPEED" This issue is scheduled to be fixed in a future release of the Quartus Prime Pro Edition software. Custom Fields values: ['novalue'] Troubleshooting QS-19321 novalue ['Interfaces Communications CPRI (Primary)'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 25.3.1 ['Agilex™ 5 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']