Pulse Signal Function

Owning Palette: Signal Generation Functions

Installed With: Control Design and Simulation Module

Generates the point-by-point value of a pulse train signal. A pulse train signal is a signal whose value switches between zero and a specified amplitude. The current value depends on the current simulation time.

Details  Example

Dialog Box Options

Block Diagram Inputs

Block Diagram Outputs

Place on the block diagram

Find on the Functions palette

Dialog Box Options

Parameter	Description
Polymorphic instance	Specifies whether this function is Scalar or Vector. The default value is Scalar.
Parameters	Lists all the parameters associated with this function. Select a parameter from this list to configure the parameter. When you select a parameter, the parameter and its associated Parameter source control appear in the Parameter Information section of the configuration dialog box.
Preview	Displays a graphical preview, if available, of the function output or configuration.
Parameter Information	Contains the parameters you can configure for this function. You must select a parameter from the Parameters list to make that parameter and its associated Parameter source control visible in the Parameter Information section of the configuration dialog box.
Parameter source	Specifies whether you configure this parameter using the Configuration Dialog Box or a Terminal on the simulation diagram. The default value is Configuration Dialog Box. If you select Terminal, LabVIEW displays an input for that parameter on the simulation diagram, and you can wire values to that input to configure this function programmatically. If you select Configuration Dialog Box, LabVIEW removes that input from the simulation diagram. You then must set the value for this parameter inside the configuration dialog box.
start time	Specifies the simulation time, in seconds, at which this function triggers the pulse signal. The default value is 0.
amplitude	Specifies the maximum amplitude of the pulse signal. The default value is 1.
offset	Specifies the amount by which to offset the y-values of the signal.
duty cycle	Specifies the ratio, expressed as a percent, between the high and low levels of the pulse signal. The default value is 50.
period	Specifies the period, in seconds, of the pulse signal. The default value is 2.

Block Diagram Inputs

Parameter	Description
start time	Specifies the simulation time, in seconds, at which this function triggers the pulse signal. The default value is 0.
amplitude	Specifies the maximum amplitude of the pulse signal. The default value is 1.
offset	Specifies the amount by which to offset the y-values of the signal.
duty cycle	Specifies the ratio, expressed as a percent, between the high and low levels of the pulse signal. The default value is 50.
period	Specifies the period, in seconds, of the pulse signal. The default value is 2.

Block Diagram Outputs

Parameter	Description
output	Returns the value of the signal evaluated at the current simulation time. The default value is 1.

Pulse Signal Details

The following equations define the pulse train signal.

y = A * square

where
	A is the amplitude
	f is the frequency
	t is the current simulation time
	p is the phase
	D is the duty cycle
	y is the output

Feedthrough Behavior

All input/output pairs of this function have direct feedthrough behavior.

Example

Refer to the SimEx Pulse VI in the labview\examples\Control and Simulation\Simulation\Signal Generation directory for an example of using the Pulse Signal VI.

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