Techniques for generating a PAM eye diagram in a receiver

A circuit comprising:

• a first receiver circuit comprising a first number of first interleaved analog-to-digital converters;
• a data reordering circuit coupled to the first number of the first interleaved analog-to-digital converters;
• a first equalizer coupled to the data reordering circuit;
• a pulse amplitude modulation (PAM) eye diagram construction circuit coupled to the first equalizer;
• and
• an analysis circuit coupled to the PAM eye diagram construction circuit, wherein the analysis circuit is coupled to receive a pulse amplitude modulation (PAM) eye diagram and transmit eye information of the PAM eye diagram to a second receiver circuit to adjust a setting of a second equalizer of the second receiver circuit.

A method comprising:

• consecutively transmitting a transmission signal from a transmitter a plurality of times to provide transmission signals;
• receiving each of the transmission signals by a first receiver and a second receiver;
• consecutively digitizing each of the transmission signals by the first receiver at a first sampling frequency;
• consecutively digitizing each of the transmission signals by the second receiver at a second sampling frequency that is less than or equal to the first sampling frequency;
• generating a pulse amplitude modulation (PAM) eye diagram of the transmission signals using digitized signals digitized by the first and the second receivers from the transmission signals;
• determining eye-opening information of at least one eye of the PAM eye diagram;
• and
• adjusting a first tap setting of a first equalizer of the first receiver using the eye-opening information determined from the at least one eye of the PAM eye diagram to compensate for transmission losses and noise of the transmission signals from the transmitter to the first and the second receivers.