Agilent Technologies N4413A User Manual page 150

Menu Reference
Data Menu
Enter a Tab Title for the tab associated with this display. In this case, Quadrature Hybrid
was entered. See the tab on the illustration on page 142.
Select the Number of Plots to use in this display, up to four. You can enter the number
directly or use the arrows. This display has four defined plots.
NOTE You must complete the definition of all the plots you add to the display.
Click a radio button to Select Plot to Modify. There will be as many buttons (one to four) as
there are defined plots.
Each user-defined plot requires a Graph Name. The graph name appears above the plot. In
this quadrature hybrid characterization, the graph name Amplitude Imbalance is used to
describe the plot.
Enter a Variable Name for the plot. You use variable names to identify equations defined in
the equation box. AI is defined in the equation as S /S . Once defined, AI can be used as an
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operand in an equation on another plot. For instance, AI−S would evaluate as (S /S )−S .
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Variable names can be up to 20 characters long and cannot contain spaces.
Enter an Equation for the plot. In general, all of the expressions operate on complex
numbers. Operands in equations can be any defined variable name (see above), S-parameters,
mixed-mode S-parameters, and constants. Constants are any valid floating point number and
Pi (entered as PI).
140 Chapter 5