This mode performs a time-domain simulation (transient analysis) until you click the Stop button. In this mode, data is displayed by the instruments and by the indicator components.

You can also place probes to display measurements directly on the circuit during interactive simulation. Refer to the Probes in Interactive Simulation section for more information.

Additionally, interactive components such as switches and certain instruments such as the Function Generator, can be used to change the circuit state during simulation.

Analysis Parameters

The Analysis parameters tab contains the following:

  Parameter   Description
Initial conditions

Select one of:

Set to zero—No energy is stored. At time = 0 s, the voltage across capacitors is 0 V and current through inductors is 0 A. Any initial condition settings in the components or nets are ignored.

User-defined—Energy is stored according to initial conditions defined in the components or initial voltage conditions defined on nets. For example, in a capacitor, you can specify the initial conditions as a voltage across the capacitor:

Calculate DC operating point—Multisim performs a DC operating point analysis and initializes all energy storage elements according to the results. Any explicit specifications of initial conditions, such as the initial voltage across a capacitor, are ignored.

If the DC operating point cannot be determined, then the entire transient analysis is terminated.

Determine automatically—Multisim performs a DC operating point analysis and initializes all energy storage elements according to the results. Any explicit specifications of initial conditions, such as the initial voltage across a capacitor, are ignored.

Unlike the Calculate DC operating point option, if Multisim fails to find the DC operating point the transient analysis proceeds with all energy storage elements initialized to zero.
End time (TSTOP) End time of transient analysis.
Maximum timestep (TMAX) Enable to manually enter the maximum time step desired.
Initial time step (TSTEP) Enable to set the initial time step for simulation output and graphing.

Output

The Output tab contains the following:

  Parameter   Description
Show all device parameters at end of simulation in the audit trail Deselect if there are many device parameters and the circuit takes a long time to exit simulation.

Analysis Options

The Analysis options tab contains the following:

  Parameter   Description
SPICE options

Use Multisim defaults—This is the default setting.

Use custom settings—To use custom SPICE settings, click this and then click Customize. The Custom Analysis Options dialog box appears.

Refer to the Custom Analysis Options section for a complete list of the available analysis options.
Other options

For simulations that run faster than real time—Select Limit maximum simulation speed to real time or Simulate as fast as possible.

Grapher data—Select Discard data to save memory or Continue without discarding previous data.

Maximum number of points—The maximum number of points in a graph. The higher this number is, the more memory will be used.