| Data to Use for X-Axis |
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If <Default>, the data used for the X-axis of
the measurement matches the sweep set as Use for x-axis. Note that one
of the sweeps in the measurement must be set to this. If other than
<Default>, the sweep index for the measurement still uses the sweep
that has Use for x-axis set, but the values used to define the X-axis of
the points on the plot come from the specified quantity. A common use of this parameter is
when an index is used as the independent variable in the MDIF file, but the actual measured
quantity that you want to sweep against is a dependent quantity in the MDIF. For example, in
the load pull MDIF files, power is represented as an index iPower, so you can set the iPower
sweep to Use for x-axis, then use this option to select
PSrc_Ava to plot a value versus available input source power. The
advantage of using an index for a sweep is that you can slice the data as if it is on a
regular grid, but still plot values versus the actual measured quantities that may not fall
on a regular grid.
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