The LeCroy 9310AM oscilloscope’s simple graph can tell you many things about a signal such as: the time and voltage values of a signal the frequency of an oscillating signal the ?moving parts? of a circuit represented by the signal the frequency with which a particular portion of the signal is occurring relative to other portions whether or not a malfunctioning component is distorting the signal how much of a signal is direct current (DC) or alternating current (AC) and how much of the signal is noise and whether the noise is changing with time.