User`s manual

Table Of Contents
14 LINEARITY & DISTORTION
14.1 INTRODUCTION
Linearity and Distortion analysis are grouped together though they are, apparently,
opposite terms.
From the analyser point of view however, they are similar as either the fundamental
or the harmonics (intermodulation) amplitude is evaluated while sweeping D.U.T.
input level.
Defining applications for these analysis would bring to and endless list, limited only
by user fantasy; however the entire menu is oriented to perform measurements on
electronic devices as power amplifiers or preamplifiers. The X axis units can be
selected between Volts and Watts. So please don’t put a microphone in front of a
loudspeaker expecting useful results except, maybe, destroying the unit.
14.2 LINEARITY & DISTORTION CONTROL PANEL
Starts a Linearity and Distortion measurement.
Enters the Linearity and Distortion settings dialog box.
Compute Linearity, and is enabled only if Linearity analysis is selected (in the
settings dialog, see below). Basically the process consists in dividing the
measured output by the supplied input. Doing this greatly simplify realising both
DUT gain and deviation from linearity. The following example should clarify
things further.
14 LINEARITY & DISTORTION 197