Fixed Probes

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There are many types of fixed probe as described in the following table

Probe Type Description To Place
Voltage Single ended voltage. Hint: If you place the probe immediately on an existing schematic wire, it will automatically be given a meaningful name related to what it is connected to Menu: Probe ▶ Place Fixed Voltage Probe...

Hot key: B
Current Device pin current. A single terminal device to place over a device pin Menu: Probe ▶ Place Fixed Current Probe...

Hot key: U
Inline current In line current. This is a two terminal device that probes the current flowing through it. Menu: Probe ▶ Place Inline Current Probe...
Differential voltage Probe voltage between two points Menu: Probe ▶ Place Fixed Diff. Voltage Probe...
dB Probes db value of signal voltage. Only useful in AC analysis Menu: Probe AC/Noise ▶ Fixed dB Probe...
Phase Probes phase of signal voltage. Only useful in AC analysis Menu: Probe AC/Noise ▶ Fixed phase Probe...
Bode plot with Measurements Plots db and phase of vout/vin. Connect to the input and output of a circuit to plot its gain and phase. Includes optionsl measurements for phas margin, gain margin and gain crossover frequency Menu: Probe AC/Noise ▶ Bode Plot Probe - with Measurements
Bode plot - basic version Plots db and phase of vout/vin. Connect to the input and output of a circuit to plot its gain and phase. Menu: Probe AC/Noise ▶ Bode Plot Probe - Simple
Bus plot Plots bus signal in 'logic analyser' style Menu: Probe ▶ Place Fixed Bus Probe
Power plot Plots the power in a device. The power probe must be attached to a single pin of the device. It doesn't matter which pin - the power plotted in the instantaneous power in the whole device Menu: Probe ▶ Place Fixed Power Probe...
Per Cycle Plot a graph based on a calculation performed for each complete cycle of a repetitive waveform. See Per Cycle Probes Available from Parts Selector
X-Y Plot a graph of one signal on the y-axis with respect to a second signal on the x-axis. See X-Y Probes Menu: Probe ▶ Place XY Probe
These probes are simply schematic symbols with special properties. When you place a fixed probe on the schematic, the probed value at the point where you place the probe will be plotted each time you run the simulation.

Current probes and power probes must be placed directly over a part pin. They will have no function if they are not and a warning message will be displayed.

Fixed Probe Options

All probe types have a large number of options allowing you to customise how you want the graph plotted. For many applications the default settings are satisfactory. In this section, the full details of available probe options are described. Select the probe and press F7 or menu Edit Part... The following dialog will be displayed for voltage, current, power, db and phase probes:

The elements of each tabbed sheet are explained below.

Probe Options Sheet

Curve Label Text displayed by the probe on the schematic and also used to label the resulting curves
Persistence The number of curves from a single probe that will be displayed at once.
  • If non-zero, curves created from the curve will have a limited lifetime with the oldest being automatically deleted first.
  • If set to zero, the curves will never be deleted.
If default is checked, the number of curves will be based on the values specified in the general options.


To set the persistence value in general options, follow these steps:
  1. From the menu bar, select File ▶ Options ▶ General..., and then select the Graph/Probe/Data Analysis tab
  2. In the Fixed probe global options section, enter a value in the Default persistence field, and then click Ok


Axis type 		Specifies the type of y-axis to use for the curve.
Auto Select Uses the main y-axis unless its units are incompatible; for example, if you plot a current on a graph that already has a voltage, a new y-axis will be created alongside the main one. See diagram in section Graph Layout - Multiple Y-Axis Graphs.


If the signal is digital, a digital axis (see below) will be used for this probe.


Use Separate Y-axis 		Uses its own separate y-axis.
If you specify this you can optionally supply an axis name that is arbitrary and used to identify the axis so that multiple fixed probes can specify the same one. This name is not used as a label for display purposes but simply as a means of identification.
Axes can be labelled using the Axis Labels sheet as explained below.


Use Separate Grid 		Similar to above but uses a new grid that is stacked on top of main grid. See diagram in section Graph Layout - Multiple Y-Axis Graphs.


Digital 		Use a digital axis. Digital axes are placed at the top of the window and are stacked. Each one may take only a single curve. As the name suggests, these are intended for digital traces but can be used for analog signals if required.


Graph 		Check Use Separate Graph to create a new graph sheet for the probe. You may also supply a graph name, which works the same way as axis name described above. this is not a label but a means of identification. Any other probes using the same graph name will have their curves directed to the same graph sheet.


Analyses 		Specifies for which analyses the probe is enabled.
Note: Other analysis modes such as noise and sensitivity are not included because these do not support schematic cross probing of current or voltage. For SIMPLIS mode, a Periodic Operating Point (POP) option is also available.


Display order 		Enter a string to control the grid display order.
The value is arbitrary and will not be displayed. To force the curve to be placed above other curves that don't use this value, prefix the name with '!'. The '!' character has a low ASCII value. Conversely, use '~' to force curve to be displayed after other curves.


Colour 		Check Use default to minimise duplicate colours on the same graph by allowing the colour to be chosen automatically. Alternatively uncheck, this box and then press Edit... to select a colour of your choice. In this case the trace always has the same colour.


Plot on completion only

  • If checked, incremental plotting is disabled; that is, the plot does not appear until the run is complete.
  • If not checked, the curve updates regularly during the course of the run.
Note: For some expressions, it is not possible to incrementally plot the data; if this is the case incremental plotting is disabled and this check box is ignored.

Axis Scales Sheet

Parameter Description
Lin/Log/Auto Specify whether you want X-Axis to be linear or logarithmic.
  • If you select Auto, the axis (X or Y) will be set to log if the x values are logarithmically spaced.
  • For the Y-axis, it is also necessary that the curve values are positive for a log axis to be selected.


No Change
Auto scale
Defined 		Controls how the axis limits are defined
  • If you select No change, the axis scales remain as they are; this is relevant only if you are adding to an existing graph.
  • If you select Auto scale, the axis scales are based on the minimum and maximum values of the curve.
  • If you select Defined, enter values in the Min and Max fields.

Axis Labels Sheet

This sheet has four edit boxes allowing you to specify, x and y axis labels as well as their units. If any box is left blank, a default value will be used or will remain unchanged if the axis already has a defined label.

Fixed Bus Probe Options

Select device and press F7 in the usual manner. A dialog box will show similar to that shown in Bus Probe Options. But you will notice an additional tabbed sheet titled Probe Options. This allows you to select an axis type and graph in a similar manner to that described above for fixed voltage and current probes.

Using Fixed Probes in Hierarchical Designs

Fixed probes may successfully be used in hierarchical designs. If placed in a child schematic, a plot will be produced for all instances of that child and the labels for each curve will be prefixed with the child reference.

Adding Fixed Probes After a Run has Started

When you add a fixed single ended voltage or current probe after a run has started, the graph of the probed point opens soon after resuming the simulation. To do this:

  1. Pause simulation.
  2. Place a probe on the circuit in the normal way.
  3. Resume simulation

Per-cycle Probes

Per Cycle Probes first calculate a new curve based on a built-in formula and then plot the curve on a graph. The input can be one of the following:

As with the other probes, the curve can be output to any graph and axis. Per Cycle Probes are compatible with both simulators.

The Per-cycle Probe specification is shown in the following table:

Per-cycle Probes
Model Name: Per Cycle Probes
Simulator: The device is compatible with the SIMetrix and SIMPLIS simulators
SIMetrix Parts Selector Location: Probes ▶ Per Cycle Voltage Probes
Probes ▶ Per Cycle Diff Voltage Probes
Probes ▶ Per Cycle Current Probes
Probes ▶ Per Cycle Diff Current Probes
SIMPLIS Parts Selector Location: Commonly Used Parts ▶ Per Cycle Voltage Probes
Commonly Used Parts ▶ Per Cycle Diff Voltage Probes
Commonly Used Parts ▶ Per Cycle Current Probes
Commonly Used Parts ▶ Per Cycle Diff Current Probes


Symbol Library: 		None the symbol is automatically generated when placed
Symbols:
Multiple Selections: Multiple probes can be selected and edited simultaneously.

Per-Cycle Timing Measurements

These advanced probes allow you to visualize subtle behaviour which is not otherwise easy to see. One example is to visualize how the switching frequency varies over the simulation time window. In this case, the probe first finds all edges which match the trigger conditions and then calculates a new curve with the frequency measurements on the vertical axis and the input time vector on the horizontal axis. An example waveform showing a pulse train and the per cycle frequency of the curve is shown below:

The following timing measurements are supported on a per-cycle basis:

Per-Cycle Amplitude Measurements

The per-cycle measurement can also be applied to amplitude of an input voltage or current. For example, you can plot the mean value of a switching power converter output with the mean value being calculated on a per-cycle basis. This example is show below - the mean value of a converter output voltage is plotted in a per-cycle manner. The gate voltage is used to determine the timing edge information.

The following amplitude measurements are supported:

Editing the Per Cycle Probe

To configure the Per Cycle Probe, follow these steps:

  1. Double click the symbol on the schematic to open the editing dialog to the Probe Options tab.
  2. Make the appropriate changes on the three tabs as explained below.

Per Cycle Probe Options

The following tab allows you to define general probe options, which are explained in the table below.

Parameter Description
Measurement Frequency, Period, On-Time, Off-Time, Duty Cycle, Mean Maximum, Minimum, Peak-to-Peak, or RMS


Edge
Direction 		Rising, Falling or Both
Curve type Stepped or Smooth
Curve Label Text displayed by the probe on the schematic and also used to label the resulting curves
Persistence The number of curves from a single probe that will be displayed at once.
  • If non-zero, curves created from the curve will have a limited lifetime with the oldest being automatically deleted first.
  • If set to zero, the curves will never be deleted.
If default is checked, the number of curves will be based on the values specified in the general options.


To set the persistence value in general options, follow these steps:
  1. From the menu bar, select File ▶ Options ▶ General..., and then select the Graph/Probe/Data Analysis tab
  2. In the Fixed probe global options section, enter a value in the Default persistence field, and then click Ok


Axis type 		Specifies the type of y-axis to use for the curve.
Auto Select Uses the main y-axis unless its units are incompatible; for example, if you plot a current on a graph that already has a voltage, a new y-axis will be created alongside the main one. See diagram in section Graph Layout - Multiple Y-Axis Graphs.

If the signal is digital, a digital axis (see below) will be used for this probe.


Use Separate Y-axis 		Uses its own separate y-axis.
If you specify this you can optionally supply an axis name that is arbitrary and used to identify the axis so that multiple fixed probes can specify the same one. This name is not used as a label for display purposes but simply as a means of identification.
Axes can be labelled using the Axis Labels sheet as explained below.


Use Separate Grid 		Similar to above but uses a new grid that is stacked on top of main grid. See diagram in section Graph Layout - Multiple Y-Axis Graphs.


Digital 		Use a digital axis. Digital axes are placed at the top of the window and are stacked. Each one may take only a single curve. As the name suggests, these are intended for digital traces but can be used for analog signals if required.


Graph 		Check Use Separate Graph to create a new graph sheet for the probe. You may also supply a graph name, which works the same way as axis name described above. this is not a label but a means of identification. Any other probes using the same graph name will have their curves directed to the same graph sheet.


Analyses 		Specifies for which analyses the probe is enabled.
Note: Other analysis modes such as noise and sensitivity are not included because these do not support schematic cross probing of current or voltage. For SIMPLIS mode, a Periodic Operating Point (POP) option is also available.


Display order 		Enter a string to control the grid display order.
The value is arbitrary and will not be displayed. To force the curve to be placed above other curves that don’t use this value, prefix the name with '!'. The '!' character has a low ASCII value. Conversely, use '~' to force curve to be displayed after other curves.


Colour 		Check Use default to minimise duplicate colours on the same graph by allowing the colour to be chosen automatically. Alternatively uncheck, this box and then press Edit... to select a colour of your choice. In this case the trace always has the same colour.


Plot on completion only 		This option is not available with per-cycle probes and the setting of the check box will be ignored.

Axis Scales

The following tab allows you to define the scale for the X-axis and for the Y-axis as explained in the table below.

Parameter Description
Lin/Log/Auto Specify whether you want X-Axis to be linear or logarithmic.
  • If you select Auto, the axis (X or Y) will be set to log if the x values are logarithmically spaced.
  • For the Y-axis, it is also necessary that the curve values are positive for a log axis to be selected.


No Change
Auto scale
Defined 		Controls how the axis limits are defined
  • If you select No change, the axis scales remain as they are; this is relevant only if you are adding to an existing graph.
  • If you select Auto scale, the axis scales are based on the minimum and maximum values of the curve.
  • If you select Defined, enter values in the Min and Max fields.

Axis Labels

To specify axis labels and units, click the Axis Labels tab, and enter values as needed.

Note: If any box is left blank, a default value is used or remains unchanged if the axis already has a defined label.

XY Probes

XY Probes plot two curves against each other in an XY plot. Each input can be either differential voltage or inline current, and the curves can be output to any graph and axis. XY probes are available in both SIMetrix and SIMPLIS. The XY Probe specification is shown in the following table:

XY Probes
Model Name: XY Probe
Simulator: This device is compatible with the SIMetrix and SIMPLIS simulators.
Part Selector Location: Probes ▶ XY Probes
Symbol Library: connection.sxslb
Symbols:
Multiple Selections: Multiple probes can be selected and edited simultaneously.


Editing the XY Probe

To configure the XY Probe, follow these steps:

  1. Double click the symbol on the schematic to open the editing dialog to the Probe Options tab.
  2. Make the appropriate changes on the three tabs as explained below.

XY Probe Options

The following tab allows you to define general probe options, which are explained in the table below.

Curve Label Text displayed by the probe on the schematic and also used to label the resulting curves
Persistence The number of curves from a single probe that will be displayed at once.
  • If non-zero, curves created from the curve will have a limited lifetime with the oldest being automatically deleted first.
  • If set to zero, the curves will never be deleted.
If default is checked, the number of curves will be based on the values specified in the general options.


To set the persistence value in general options, follow these steps:
  1. From the menu bar, select File ▶ Options ▶ General..., and then select the Graph/Probe/Data Analysis tab
  2. In the Fixed probe global options section, enter a value in the Default persistence field, and then click Ok


Axis type 		Specifies the type of y-axis to use for the curve.
Auto Select Uses the main y-axis unless its units are incompatible; for example, if you plot a current on a graph that already has a voltage, a new y-axis will be created alongside the main one. See diagram in section Graph Layout - Multiple Y-Axis Graphs.

If the signal is digital, a digital axis (see below) will be used for this probe.


Use Separate Y-axis 		Uses its own separate y-axis.
If you specify this you can optionally supply an axis name that is arbitrary and used to identify the axis so that multiple fixed probes can specify the same one. This name is not used as a label for display purposes but simply as a means of identification.
Axes can be labelled using the Axis Labels sheet as explained below.


Use Separate Grid 		Similar to above but uses a new grid that is stacked on top of main grid. See diagram in section Graph Layout - Multiple Y-Axis Graphs.


Digital 		Use a digital axis. Digital axes are placed at the top of the window and are stacked. Each one may take only a single curve. As the name suggests, these are intended for digital traces but can be used for analog signals if required.


Graph 		Check Use Separate Graph to create a new graph sheet for the probe. You may also supply a graph name, which works the same way as axis name described above. this is not a label but a means of identification. Any other probes using the same graph name will have their curves directed to the same graph sheet.


Analyses 		Specifies for which analyses the probe is enabled.
Note: Other analysis modes such as noise and sensitivity are not included because these do not support schematic cross probing of current or voltage. For SIMPLIS mode, a Periodic Operating Point (POP) option is also available.


Display order 		Enter a string to control the grid display order.
The value is arbitrary and will not be displayed. To force the curve to be placed above other curves that don’t use this value, prefix the name with '!'. The '!' character has a low ASCII value. Conversely, use '~' to force curve to be displayed after other curves.


Colour 		Check Use default to minimise duplicate colours on the same graph by allowing the colour to be chosen automatically. Alternatively uncheck, this box and then press Edit... to select a colour of your choice. In this case the trace always has the same colour.


Plot on completion only 		This option is not available with XY Probes and the check box setting will be ignored.

Axis Scales

Parameter Description
Lin/Log/Auto Specify whether you want X-Axis to be linear or logarithmic.
  • If you select Auto, the axis (X or Y) will be set to log if the x values are logarithmically spaced.
  • For the Y-axis, it is also necessary that the curve values are positive for a log axis to be selected.


No Change
Auto scale
Defined 		Controls how the axis limits are defined
  • If you select No change, the axis scales remain as they are; this is relevant only if you are adding to an existing graph.
  • If you select Auto scale, the axis scales are based on the minimum and maximum values of the curve.
  • If you select Defined, enter values in the Min and Max fields.

Axis Labels

To specify axis labels and units, click the Axis Labels tab, and enter values as needed.

Note: If any box is left blank, a default value is used or remains unchanged if the axis already has a defined label.

Bode Plot Probe with Measurements

The Bode Plot Probe with Measurements generates plots for the gain and phase of the ratio of two voltages. The probe can be configured to plot only the gain or phase, or both gain and phase.

Summary - Bode Plot Probe with Measurements
Model Name Bode Plot Probe
Simulator This device is compatible with both SIMetrix and SIMPLIS simulators
Schematic Menu Probe AC/Noise ▶ Bode Plot Probe - with Measurements
Parts Selector Probes ▶ Bode Plot Probe - with Measurements
Symbol Library Connections
Model File none
Symbol
Multiple Selections If multiple Bode plot probes are selected before editing, all properties except the curve labels can be simultaneously changed for all probes. The curve label properties will remain unchanged for all selected probes
Usage This schematic probe symbol plots the magnitude and phase of the ratio of two complex voltages, OUT/IN. The magnitude can be plotted in db or volts/volts; the horizontal axis scale is determined by the simulation sweep type. If the simulation is swept in log frequency steps, the horizontal axis will automatically be log scaled

Editing the Bode Plot Probe with Measurements

To configure the Bode Plot Probe with Measurements, follow these steps:

  1. Double click the symbol on the schematic to open the editing dialog to the Parameters tab.
  2. Make the appropriate changes to the fields described in the table below the image.

Options - Bode Plot Probe with Measurements
Use separate graph Check this option in order to supply an alias for each output graph tab
Graph name The Graph name is an alias for each output graph tab and will not be visible on the graph output. Curves with the same graph name property will be output on the same graph tab. Graph name be safely ignored unless multiple Bode plot probes are used. Use separate graph must be checked to supply this name.
Disable gain/phase Check this box to disable both gain and phase graphs
Persistence The Persistence property determines when previous simulation data is deleted from the graph viewer. If Use default is checked or if the persistence is set to -1, the probe uses the default global persistence value. The default persistence can be set from the command shell menu: File ▶ Options ▶ General
  • If set to "0", the graph data is never deleted, and subsequent simulations will add new curves to the same axis locations
  • If set to a positive integer, the persistence value will be interpreted as the number of simulations to keep on the graph. For example, a persistence setting equal to 1 keeps only the current data, and each subsequent simulation overwrites the graph. A setting equal to 2 keeps the current data and the data from the previous simulation
Curve label Sets the name of the curve. Note: This field appears in both the Gain and Phase groups on the dialog
Y axis label Sets the Y axis label for the individual gain and phase axes. When multiple curves from multiple probes are placed on the same axis, the axis label properties must be identical or the axis label is blank. If this field is left blank, the axis label appears with the name specified in the Curve label field. Note: This field appears in both the Gain and Phase groups on the dialog
Vertical scale Allows you to select the function to perform on the simulation data.
  • Select db to perform the built-in db() vector function.
  • Select Linear to perform the mag() function
Curve Selects the Phase curve offset
  • Select Phase for no offset.
  • Select Phase - 180 degrees to subtract 180 degrees before plotting the curve.
Vertical axis This group has two options: Vertical limits
  • Check to have the vertical limits automatically set to fit the curve data.
  • Uncheck to enter minimum and maxium values for the limits.
Both minimum and maximum axis limits must be set or auto-calculated as a group. Grid spacing:
  • Check to auto calculate the grid spacing.
  • Uncheck to set the grid spacing independent of the axis limits
Note: This field appears in both the Gain and Phase groups on the dialog.
Colour Defines colours for the curves:
  • Check Use default in both the Gain and Phase groups o generate the curves with the same default colour, which is automatically selected from a sequence of colours
  • Leave Use default unchecked and click Edit... to open a colour selector dialog box to specify fixed colours for the curves


The change the default sequence of colours from the command shell menu, select File ▶ Options ▶ Colour For additional information see Colours and Fonts. Note: This field appears in both the Gain and Phase groups on the dialog.
Display curves on Allows you to define the number of grids in the output: Single grid or Two grids
Vertical order Allows you to specify the order of the curves: Phase above Gain or Gain above Phase.
  • If you selected Two grids is in the Display curves on group, the selection in this group specifies the curve output location
  • If you selected Single grid, both curves are on the lower grid with two axes
Example curve output Example curve output illustrates the relative locations of the two curves. Note: The curve data here is fixed; these curves are examples and do not reflect the simulated curves
Save Configuration Click Save Configuration to preserve this information as the default configuration for all future new Bode plot probes

Bode Plot Probe - Basic Version

Connects to the input and output of a circuit to plot its gain and phase. A more sophisticated bode plot probe which provides a wide range of options along with the display of useful measurements is also available and is recommended for most applications. See Bode Plot Probe with Measurements

This basic version is useful for quick checks and for compatibility with versions 7.0 or earlier.

Summary - Bode Plot Probe - Basic
Model Name Bode Plot Probe - Basic
Simulator This device is compatible with both SIMetrix and SIMPLIS simulators
Schematic Menu Probe AC/Noise ▶ Bode Plot Probe - Basic
Parts Selector Probes ▶ Bode Plot - Gain/Phase
Symbol Library Connections
Model File none
Symbol
Multiple Selections If multiple Bode plot probes are selected before editing, all properties except the curve labels can be simultaneously changed for all probes. The curve label properties will remain unchanged for all selected probes
Usage This schematic probe symbol plots the magnitude and phase of the ratio of two complex voltages, OUT/IN. The magnitude can be plotted in db or volts/volts; the horizontal axis scale is determined by the simulation sweep type. If the simulation is swept in log frequency steps, the horizontal axis will automatically be log scaled

Editing Bode Plot Probe

To configure the Bode Plot Probe, follow these steps:

  1. Double click the symbol on the schematic to open the editing dialog to the Parameters tab.
  2. Make the appropriate changes to the fields described in the table below the image.

Options - Bode Plot Probe
Curve labels Sets labels for plots
  • Gain label: Label used for gain plot
  • Phase label: Label used for phase plot
Properties Set additional properties on probe:
  • Persistence: Controls how many plots are retained. 0 means use global default setting
  • Multiplied by -1: Inverts the sense of the phase
  • Disable: Disable probe. If checked no plots will be created
Vertical Limits Divided into two parts to allow setting of axis limits for phase and gain plots.
  • Use db auto limits: If checked the gain plot will automatically scale. Otherwise manual limits can be entered in Maximum limit - dB and Minimum limit - dB
  • Use phase auto limits: If checked the phase plot will automatically scale. Otherwise manual limits can be entered in Maximum limit - phase and Minimum limit - phase

Fourier Analysis

There are currently no fixed probes that create a Fourier Spectrum automatically. Fourier plots can be created manually after the simulation is complete using the procedures described in Fourier Analysis.

Although there are no Fourier fixed probe symbols, it is nevertheless possible to create Fourier plots automatically after the simulation is complete using the simulator's .GRAPH statement and the Spectrum() function. This is added to the F11 window of the schematic. (see Manual Entry of Simulator Commands)

The command to enter in the F11 window is typically of the form:

.GRAPH "Spectrum(Vector, number_of_points, start_time, end_time)"
+ curvelabel="curve_label" ylog=y_axis_type

Where

Vector Vector whose Fourier analysis is required. Typically this would be the name of a terminal symbol added to the schematic. (See Finding and Specifying Net Names)
number_of_points Number of sample points used for the Fourier. This must be a power of 2 and will control the maximum frequency in the result. This will be $number_of_points/sample_period/2$
start_time The start of the sample period in the time-domain data (i.e. transient analysis result)
end_time The end of the sample period in the time-domain data. The best results will be obtained if start_time and end_time define a span that represents a whole number of cycles
curve_label Descriptive label
y_axis_type Set to log for a logarithmic y-axis or lin for a linear axis.

The above definition shows a typical usage but more options are available. The .GRAPH statement has many more optional parameters and further pre and post processing of the spectrum may be performed. The result can be expressed in dB by applying the dB function:

.GRAPH "db(Spectrum(Vector, number_of_points, start_time, end_time))"
+ curvelabel="curve_label" ylog=lin

A logarithmic x-axis can be specified:

.GRAPH "Spectrum(Vector, number_of_points, start_time, end_time)"
+ curvelabel="curve_label" ylog=log xlog=log xmin=start_freq xmax=end_freq

For more information refer to the Script Reference Manual/Function Reference for details on other functions that can be used in the expression and the Simulator Reference Manual/Command Reference/.GRAPH for details about the .GRAPH statement.

Changing Update Period and Start Delay

The update period of all fixed probes can be changed from the Options dialog box. Select menu File ▶ Options ▶ General... and click on the Graph/Probe/Data analysis tab. In the Probe update times/seconds box there are two values that can be edited. Period is the update period and Start is the delay after the simulation begins before the curves are first created.

◄ Probes: Fixed vs. Random

Random Probes ▶



Copyright © SIMetrix Technologies Ltd. 2015
Copyright © SIMPLIS Technologies Inc. 2015