For the first time, preselected signal analysis is available to 75 GHz. With preselection, you can quickly and easily characterize all signals of interest. No images or multiples are displayed to confuse the measurement. Time consuming signal-identification routines are eliminated. Figure 1 shows how true signals can be obscured by displayed multiples and images in an unpreselected system. Figure 2 shows how only the true signals are displayed when an Agilent Technologies 11974 Series preselected millimeter mixer is used in making the measurement.