Random Uniform Base Excitation Units Problem

I am running a Linear Dynamic Study with a Random input. I amusing a Uniform Base Excitation as an input to the system so that Ican create a power spectral density (PSD) output. I need to enteracceleration, and so the dropdown box under "PSD Acceleration" onthe "Uniform Base Excitation" menu gives the units of g^2/Hz. Thisis confusing. The imput excitation should be an acceleration withunits of "g" or "m^2/s". The output of a PSD can be g^2/Hz, butthis unit assumes that I know what the width of my discretizationis (for example, if I solve every 10Hz, then my output is g^2/10Hzwhich averages the g^2 value across the 10Hz window). When I'mentering the input acceleration, I don't know what the frequencydiscretization width is.

So, is the acceleration input on this page really in g's and it isjust labeled for what the output of the PSD is going to be? Am Isupposed to run the whole analysis, see what the discretizationwidth is, and then come back to change my input correctly? What'sgoing on here?
Thanks for the help.SolidworksSimulation