A transmitter including a noise signal generator and a summing element is provided. The noise signal generator is configured to receive multiple noise settings and output multiple noise signals corresponding to the multiple noise settings. The summing element is configured to receive a transmit data signal and the multiple noise signals, sum one or more of the multiple noise signals with the transmit data signal, and output to a transmit driver configured to generate one of a single-ended and a differential signal based on the sum of the one or more of the multiple noise signals with the transmit data signal.