Two segments of RXTE/PCA light curves of GRS 1915+105 in the ρ variability class at three energies showing the HXD phenomenon and the dependence of the pulse width, w, upon energy. Data, after the subtraction of a constant level, are scaled to obtain comparable pulse heights. Upper panel: RXTE G-2a data; lower panel: G-1 data. In the latter data set the recurrence time of the bursts was more than twice longer than that in the former one. We note in both panels the variable duration and shape of individual bursts and in the upper one the small time delay of the peak maxima, particularly in the first and in the third burst.