This routine was originally developed to configure the instrument to scan various sources, either by reading a configuration file (CA.CFG within the data directory) or by entering in the configuration parameters as prompted.
Currently this routine is mainly used to scan a He-Cd Laser emitting at 325 nm or 3250 angstroms through a double convex lens that is directed into the UV dome. This single wavelength source is then scanned and measured over a range of wavelengths (usually 290nm - 328nm) to determine the stray light characteristics of the instrument.