[[File:RFAC4.png|thumb|200px| Setting the parameters in the AC Frequency Sweep Test Panel.]]
===Defining RF Circuit Observables===
Before you run an AC frequency sweep test of your RF circuit, you need to set the sweep [[parameters]] and define the output data for plotting or tabulation. The frequency sweep [[parameters]] are set from the test panel of the Toolbox. You set the start and stop frequencies, the frequency interval type (typically linear) and the frequency step. In the lower part of the test panel, you define your simulation output data. Click on the buttons labeled "Preset Graph Plots..." or "Present Table Plots..." to open the Edit Plot List dialog. The dialog gives a list of all the node voltages and currents. You can choose different complex data formats such as Mag/Phase, dB/Phase or Real/Imag.
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== Network Analysis ==