The Commercial / Contractor Audio/Video industry has evolved dramatically. Concert quality audio and flawless video systems are being demanded in commercial applications such as hotels, theaters, museums, boardrooms, fitness clubs, convention centers and public viewing areas. The following instruments are used for proper setup, installation and calibration of Video (HDTV, MPEG, NTSC, PAL), Audio (from intercom systems to concert pavilions, and even theme park applications) and Distribution Systems.