This option enables you to define your own constraints in MATLAB or VBScript. STK Communications provides communications link parameters, such as C/N, Eb/N0, etc., to the script at each time step. You can also compute your own parameters, such as signal to noise ratio (SNR), and STK Communications will apply Min and Max constraints to determine the access time intervals on the basis of the user-computed constraint value returned by the script.
The constraint, when activated by selecting the Min or Max check box, enables a File field that enables you to enter or browse for your script file. STK Communications then links to the script and uses it to compute the constraint value.
For information on scripting in STK, see Engine Plugin Scripts. For instructions on the setup and use of plugin points, see Plugin Scripts. To develop a custom script from a sample template, select the appropriate sample plugin script, in MATLAB or VBScript, from <STK install folder>\CodeSamples\Extend\PluginScripts.
For a list of required inputs and outputs, see Comm Constraint Plugin Points.