A method for calibrating a receiver of an isolator product includes adjusting a peaking frequency of a receiver signal path of a first integrated circuit die of the isolator product and a gain of the receiver signal path based on a predetermined peaking frequency, a predetermined gain, a first level of a diagnostic signal during a first interval, and a second level of the diagnostic signal during a second interval. The first interval and the second interval are non-overlapping intervals. The method may include receiving a calibration signal on a differential pair of nodes of the receiver signal path of the first integrated circuit die. The method may include generating a diagnostic signal corresponding to an average amplitude of a received version of the calibration signal.