Glossary definition of 'Multi-tone testing'

A method of testing where a number of discrete tones are used to stimulate the EUT simultaneously. By capturing a single data set of the output of the EUT, many measurements can be calculated simultaneously. These can include scalar Results such as noise, distortion etc. as well as graphical plots against frequency, such as frequency response, distortion spectrum etc. This method is much faster than traditional methods, which would require stimuli to be changed for each scalar measurement and stepped through many frequencies for each plot. The dScope has a uniquely user-friendly way of setting up multi-tone tests.