Receiver Operation Mode Does Not Support Spread Spectrum Clocking Feature - Receiver Operation Mode Does Not Support Spread Spectrum Clocking Feature Description Designs targeting some Cyclone IV GX devices in receiver operation mode and with the Enable Spread Spectrum option turned on may fail to compile. Resolution None. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 10.1.1 ['Cyclone® IV FPGAs'] ['novalue'] ['novalue'] ['novalue']