1.1.1.9.2 CTLE Frequency Response Calibration

The CTLE frequency response can be set to a few discrete values, therefore calibration depends on searching for the settings that result in the largest eye area.

CTLE DC_offset and CTLE Frequency Response calibration together make up the CTLE solution. For the most lossy and disruptive channels, many or all CTLE settings combinations can result in a zero eye-opening area. In these scenarios, DFE can sometimes allow for a non-zero area, which would otherwise be impossible with CTLE alone.