diff --git a/top/x400/rf/full/rf_core_full.sv b/top/x400/rf/full/rf_core_full.sv
index 4a16b5e..d94de71 100644
--- a/top/x400/rf/full/rf_core_full.sv
+++ b/top/x400/rf/full/rf_core_full.sv
@@ -135,9 +135,10 @@ module rf_core_full # (
   assign dsp_info_sclk[FABRIC_DSP_RX_CNT_MSB:FABRIC_DSP_RX_CNT] = NUM_ADC_CHANNELS;
   assign dsp_info_sclk[FABRIC_DSP_TX_CNT_MSB:FABRIC_DSP_TX_CNT] = NUM_DAC_CHANNELS;
 
-  // This RF core always consumes 8 SPC from the gearbox per I/Q signal
-  assign rfdc_info_sclk[RFDC_INFO_SPC_RX_MSB:RFDC_INFO_SPC_RX] = $clog2(8);
-  assign rfdc_info_sclk[RFDC_INFO_SPC_TX_MSB:RFDC_INFO_SPC_TX] = $clog2(16);
+  // This RF core is designed to route through the RFDC using the same SPC setting.
+  // The SPC setting is given as a parameter to this module.
+  assign rfdc_info_sclk[RFDC_INFO_SPC_RX_MSB:RFDC_INFO_SPC_RX] = $clog2(RADIO_SPC);
+  assign rfdc_info_sclk[RFDC_INFO_SPC_TX_MSB:RFDC_INFO_SPC_TX] = $clog2(RADIO_SPC*2);
   // This RF core module contains no additional resampling
   assign rfdc_info_sclk[RFDC_INFO_XTRA_RESAMP_MSB:RFDC_INFO_XTRA_RESAMP] = 4'd1;