The 3 Series MDO is most importantly an oscilloscope but has a total of 6 different instruments individually built into it. Designed in such a way to minimize the clutter on your bench but give you the power and versatility you need. Unfortunately to be able to capture the time domain and frequency domain simultaneously you need to upgrade to the MDO4000C series oscilloscope, or upgrade to 4/5/6 series MSO with Spectrum View functionality.