Abstract: An equivalent-time sampling system accommodates quasi-repeating bit patterns by identifying a predetermined sequence of bits within the quasi-repeating bit pattern of a data signal, acquiring a series of samples of the data signal according to the clock signal associated with the data signal, independent of the timing of occurrences of the predetermined sequence of bits within the data signal. The equivalent-time sampling system counts cycles of the clock signal, wherein counting is started at an occurrence of the predetermined sequence of bits within the quasi-repeating bit pattern. The equivalent-time sampling system also synchronizes count values of the counted cycles of the clock signal to samples within the acquired series of samples.