The Vectorscope and its Applications in Color Tv, Fm and Radio Navigation - Second Edition

The Vectorscope is an oscillograph for the display of signals which consists of amplitude and/or phase modulation of a carrier at some specific center frequency. The Vectorscope displays amplitude-modulation as the radial distance of the scanning spot from center screen, and instantaneous phase as the angle counted from a fixed phase reference, say North, on the Vector screen.