24. DISTORTION MEASUREMENT24.1 THE SETTING IN THE MAIN MENUThe setting for the Distortion measurement is carry out in the main menu. In the SPL measure isto make a test measurement. The microphone is to place in a distance of 1 m to the speaker.In the SPL active menu is to select free Output control.The measurement is to start with the duration measure.With the OUTPUT controller is to set the SPL level fort he measurement. The INPUT levelcontroller is to set that the level meter bar does not get read. This overload of the input willproduce distortion.For the following distortion measurement a distance of the microphone is to reduce to 0.5m or0.36m. The setting of the OUTPUT controller, the power for speaker, is not to change.After the THD measurement is started.24.2 THE THD MEASUREMENT75
