Dynamic power spectrum showing ≈330 Hz pulsations during a burst from 4U 1702−429. The contours denote loci of constant Fourier power as a function of frequency (left ordinate) and time. The individual power spectra were computed from 2 s intervals sampled at 1/8192 s time resolution, with a new interval beginning every 0.125 s. The PCA count rate vs. time is also shown (right ordinate). The power spectral contours were aligned on the center of each 2 s interval.