the plurality of phases, iteratively adjust the second reference level and estimate the BER according to the second reference level, until a linear trend regarding the BER is determined, and thereafter extrapolate the linear trend to determine the BER for the corresponding phase.
23. The system of claim 19, wherein the receiver is to communicate the BER to the transmitter, and wherein the transmitter is to reduce an amplitude of the analog signal based on comparison of the BER to a threshold, the reduced amplitude to reduce power consumption of the transmitter.
24. The system of claim 19, wherein the receiver comprises one or more gain control circuits to receive and amplify the analog signal, an equalizer coupled to the one or more gain control circuits to equalize the amplified analog signal and to provide the equalized amplified analog signal to the first comparator and the second comparator,
25. The system of claim of 24, further comprising a control logic to control at least one of the one or more gain control circuits or the equalizer based at least in part on the BER.