How do I disable Rx OCT for ASI IP MegaCore Function? - How do I disable Rx OCT for ASI IP MegaCore Function? Description You can disable Rx OCT for ASI IP MegaCore® Function by overriding parameter for ALTGX in Assignment Editor. Resolution 1. Open Assignment Editor from Assignments -> Assignment Editor menu 2. Add your ALTGX instance into "To" field. For example [ASI instance name]|asi_receive:asi_rx_gen.u_rx|gxb4_rx_1port_1350_10bit:u_gxb4_rx.gxb4_rx_1port_1350_10bit_inst|alt4gxb:alt4gxb_component 3. Select "Parameter" for Assignment Name field 4. Set "rx_use_external_termination=true" into Value field 5. Re-compile your design Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Stratix® IV GX FPGA'] ['novalue'] ['novalue'] ['novalue']