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/* Choosing from Two Simulation Modes */
== Choosing from Two Simulation Modes ==
In [[RF.Spice A/D]], you can choose two distinct simulation modes: interactive "Live Simulations" and non-interactive "Predefined [[Tests]]". There are important differences between a test and a live simulation that must be understood before you can use [[RF.Spice A/D]] effectively.
A "Live Simulation" is simply a continuous transient simulation, which starts at time t = 0 and increments indefinitely by a user-defined time step. Simulations can be paused and continued but they run continuously until they are stopped, paused or reset. Live simulations can be stimulated by virtual instruments like a Function Generator or Power Supply, and their results can be measured by virtual instruments like the Oscilloscope, Ammeter, Voltmeter, etc. You can also use regular voltage or current sources to excite your circuit during a live simulation or use probes or circuit animation to display node voltages and currents in real time. You can vary your circuit's parameter values in real time from the "Circuit Parameters" panel of the toolbox and observe the circuit's response immediately.
"Predefined [[Tests]]", on the other hand, are run with some advance planning and preset simulation parameters. You can run [[tests]] to analyze your circuit in time and frequency domains and characterize its DC bias (operating point), transient and steady-state AC responses, noise performance, network parameters, etc. The output results of [[RF.Spice A/D]] [[tests]] are displayed on graphs or tabulated in tables.
== Working with Two Simulation Engines ==
