p=pulseperiod(x) p=pulseperiod(x, Fs) p=pulseperiod(x, t) p=pulseperiod (x, t, 'Polarity', pol) p=pulseperiod(x, t, 'MidPercentReferenceLevel', N ) p=pulseperiod(x, t, 'Tolerance', M) p=pulseperiod(x, t,'StateLevels', O)