User`s manual

Table Of Contents
The graphs refers to a linearity measurement of a Push Pull tube amp. After processing, the Y scale can be
expanded, still including the whole span, greatly enhancing detail inspection.
14.2.1 TOOLBAR DROP DOWN LIST
Input channel
Selects the input channel configuration
14.2.2 LINEARITY & DISTORTION SETTINGS DIALOG
X Axis Values
Allows setting the X axis extreme left and right values. Has immediate effect,
once OK is pressed, and has only graphical implication; that is it does not affect
the actual or next measure span.
X Axis Unit
Can be either Volts or Watts. Has immediate effect and the curve is recalculated
accordingly. Changing the impedance in the sweep settings does not affect
results as the impedance set at measuring time is taken for calculation. When
Vs. input is selected in the X Axis Vs., Volts is forced and the choice disabled.
X Axis Vs.
Selects if the X axis represents DUT output or input values. Input Values can
only be expressed in Volts.
Y Axis Scale
Selects how the Y axis is displayed. When anything but Linearity is selected in
the Analysis radio button panel, selecting Volts/% will display distortion in
percent in a bi-logarithmic graph. Selecting dB will plot distortion in dB below
198 14 LINEARITY & DISTORTION