The Full AEQ mode attempts to find what it believes is the best equalization value for CRX1 and CRX2 receivers by starting at the lowest EQ value and sweeping through all EQ combinations up to the value programmed into FULLAEQ_UPPER_EQ field. The default is to sweep through nine EQ values (zero to eight). The number of EQ combinations can be adjusted by programming FULLAEQ_UPPER_EQ register. The TUSB1004 also provides the ability to add or subtract some over/under equalization to compensate for channel in front of TUSB1004 by programming OVER_EQ_CTRL field to a non-zero value. If OVER_EQ_SIGN = 0, the TUSB1004 will add the value programmed into OVER_EQ_CTRL to the EQ value determined by the full adaptation. If OVER_EQ_SIGN = 1, the TUSB1004 will subtract the value programmed into OVER_EQ_CTRL from the EQ value determined by the full adaptation. For example, if full adaptation determines the best equalization value to be 4 and OVER_EQ_CTRL is 2 and OVER_EQ_SIGN = 0, the EQ setting used by TUSB1004 will be 6. The TUSB1004 hardware will always limit the sum of OVER_EQ_CTRL and the determined optimal EQ from full adaptation to be less than or equal to 15.