To properly answer this question, more information is needed. There are many ways to analyze an impulse. What information are you trying to get from the impulse and how are you currently using the histogram to get it? A data file containing the impulse as well as the information the impulse in the file should contain would be excellent. The easiest way to get a data file is by acquiring the signal with the NI-Scope soft front panel and saving the data. You probably want to use single shot mode (set the trigger mode selector to SGL). You will need version 1.5 or better of the soft front panel to save data. If you don't already have it, get it from the NI website.
