Decision feedback equalization correction of eye scope measurements

A method comprising:

• selectively disabling decision feedback equalization (DFE) taps provided to a vertical decision threshold of a comparator in a transceiver device, and responsively collecting, from the transceiver device, raw bit-error rate (BER) data of an input signal for a plurality of voltage amplitude offsets at a locked sampling instant;
• selectively enabling the DFE taps provided to the vertical decision threshold of the comparator and responsively collecting, from the transceiver device, DFE-compensated BER data of the input signal for the plurality of voltage amplitude offsets at the locked sampling instant;
• providing a range of sampling instant offsets and a range of voltage amplitude offsets to the comparator;
• collecting, from the transceiver device, offset raw BER data of the input signal for the provided range of sampling instant offsets and range of voltage amplitude offsets;
• calculating a BER-specific amplitude correction value for a given BER using the raw BER data at the locked sampling instant and the DFE-compensated BER data at the locked sampling instant;
• identifying a set of points of the given BER in the offset raw BER data, wherein each point corresponds to a respective sampling instant offset and voltage amplitude offset combination;
• and
• generating a set of DFE-corrected BER data by applying the BER-specific amplitude correction value to voltage amplitude offsets of the set of points of the given BER.