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SR1 Operation 199
© 2014 Stanford Research Systems
The limit X and Y values can be all moved together with the arrow buttons at the bottom of the panel.
This can be useful for creating a limit equal to an existing trace plus some error margin. Individual X and
Y values in the limit can be changed as well. If it is not necessary for the limit to have the same number
of points as the original trace, the limit can be "resized" by entering the new number of limit points in the
up-down control at the bottom of the panel and pressing "Resize". For instance, to create a limit that
consists of a single line segment, resize the limit to "2" and then adjust the starting and ending X and Y
values for the single limit segment.
Upper or lower limits can be deleted with the "Delete" button on the limit tab, and can be saved to disk
with the "Save..." button. To recall a previously saved limit use the "..." button next to the the New button
and select the previously saved file from the file dialog.
A limit can be made a "single limit," in which case it has no X-axis and only a single Y-value that is
applied to all the points in the trace. A single limit can be thought of as a horizontal line that limits the
entire trace. Once a limit has been converted to a "single limit" it cannot be undone.
2.5.1.1 Trace Calculator
Trace Calculator
The trace calculator is a powerful tool for manipulating data contained in graph traces. Each calculator
function takes as input one or more input traces and produces a new trace which contains the specified
calculator function output. If the function requires a single input the active trace is used by default. If a
second trace input is required the user can select from among all available graph traces.
The Trace Calculator can be accessed in two ways: by right-clicking the active trace in the trace listing
box or by clicking the calculator icon on the speedbar. After selecting the desired function from the