A method for testing a semiconductor device with a multi-gigabit
communications receiver includes combining a data output from a
high-speed communications transmitter with a perturbation signal
generated by automatic test equipment. The combined signal data signal
including jitter and low voltage swings is input to the communications
receiver port under test. The automatic test equipment determines the bit
error rate of the parallel data output from the receiver port under test.
This test method is appropriate for semiconductor devices with multiple
transceiver ports.