PI/EMI Analysis Heatmap

The PI/EMI Analysis Heatmap dialog allows you to display the results of PI/EMI analysis. It is displayed in eCADSTAR PCB Editor by clicking Analysis > PI/EMI > PI/EMI Analysis Heatmap.  

Item		Description
File	Import Map	Allows you to import an analysis result to the PI/EMI Analysis Heatmap dialog. Select the required file in the displayed Import Map dialog.
	Export Map	Allows you to export an analysis result from the PI/EMI Analysis Heatmap dialog. Select the required file in the displayed Export Map dialog.
	Close	Closes the PI/EMI Analysis Heatmap dialog.
Settings	Options	Launches the PI/EMI Analysis Heatmap: Options dialog. This allows you to set the parameters for the results of the PI/EMI analysis. The specified settings are applied to the currently-displayed analysis result.
Help		Displays the Online Help topic for the PI/EMI Analysis Heatmap dialog.
Import Map		Allows you to import an analysis result to the PI/EMI Analysis Heatmap dialog. Select the required file in the displayed Import Map dialog.
Export Map		Allows you to export an analysis result from the PI/EMI Analysis Heatmap dialog. Select the required file in the displayed Export Map dialog.
Options		Launches the PI/EMI Analysis Heatmap: Options dialog. This allows you to set the parameters for the results of PI/EMI analysis. The specified settings are applied to the currently-displayed analysis result.
Help		Displays the Online Help topic for the PI/EMI Analysis Heatmap dialog.

PI Impedance

If you select PI (Impedance) in the Import Map dialog, then the following fields are displayed in the PI/EMI Analysis Heatmap dialog.

Item		Description
Power Bus		Allows you to select the power buses for which a heatmap is displayed on the canvas.
	Select all power buses	All power buses in the Power Bus box are selected.
	Clear selected power bus	Selected power buses in the Power Bus box are deselected.
Power Bus box		Shows the power buses for which a heatmap can be displayed on the canvas.
Frequency		Displays the frequencies that are held by the selected power bus. You can select multiple frequencies.
Layer Pair		Allows you to select the layer pairs for the power and ground layers that are associated with the relevant frequency. The Color Scale section is immediately updated. If Show is toggled on in this dialog, then the relevant heatmap is immediately displayed on the canvas.
	Pwr	Shows the power layer that is associated with the relevant layer pair.
	Gnd	Shows the ground layer that is associated with the relevant layer pair.

DC (Voltage/Current Density)

If you select DC (Voltage/Current Density) in the Import Map dialog, then the following fields are displayed in the PI/EMI Analysis Heatmap dialog.

Item		Description
Power Bus		Allows you to select the power buses for which a heatmap is displayed on the canvas.
	Select all power buses	All power buses in the Power Bus box are selected.
	Clear selected power bus	Selected power buses in the Power Bus box are deselected.
Power Bus box		Shows the power buses for which a heatmap can be displayed on the canvas.
Map type		Allows you to specify the type of heatmap that is displayed on the canvas.
	Voltage	If selected, then the voltage heatmap is displayed on the canvas.
	Current density	If selected, then the current density distribution is displayed on the canvas.
	Power Map	If selected, then the heatmap for power nets is displayed on the canvas.
	Ground Map	If selected, then the heatmap for ground nets is displayed on the canvas.
Conductor layer		The conductor layers are listed that are associated with the selected power bus. You can select multiple layers.

Common mode voltage distribution

If you select Common mode voltage distribution in the Import Map dialog, then the following field is displayed in the PI/EMI Analysis Heatmap dialog. This allows you to view the common mode voltage map at a selected frequency. Common mode voltage distribution is the driving force which causes common mode currents in attached cables. It depends on the amplitude and frequency of the signal currents and, obviously, on the routing pattern.

Item		Description
Frequency		Allows you to select the frequency of the heatmap for the common mode voltage distribution. If Show is toggled on in this dialog, then the selected heatmap is immediately displayed on the canvas.

I/O coupling voltage distribution

If you select I/O coupling voltage distribution in the Import Map dialog, then the heatmap for I/O coupling voltage distribution data is displayed on the canvas.

Color Scale

Item		Description
Scale box		Allows you to select a predefined color scale for the specified heatmap.
	Scale 1	The following graduated color scale is used to display the heatmap on the canvas for the selected range of values.
	Scale 2	The following graduated color scale is used to display the heatmap on the canvas for the selected range of values.
	Scale 3	The following non-graduated color scale is used to display the heatmap on the canvas for the selected range of values.
	Scale 4	The following non-graduated color scale is used to display the heatmap on the canvas for the selected range of values.
Min. - Max.		The heatmap is represented by gradation between the relevant minimum and maximum values. If you select PI (Impedance) in the Import Map dialog, then resistance values are shown in the heatmap. If you select DC (Voltage/Current density) in the Import Map dialog, then voltage/current density values are shown in the heatmap. If you select Common mode voltage distribution or I/O Coupling voltage distribution in the Import Map dialog, then voltage values are shown in the heatmap.
0 - Max.		The heatmap is represented by gradation between the relevant 0 and maximum values. If you select PI (Impedance) in the Import Map dialog, then resistance values are shown in the heatmap. If you select DC (Voltage/Current density) in the Import Map dialog, then voltage/current density values are shown in the heatmap. If you select Common mode voltage distribution or I/O Coupling voltage distribution in the Import Map dialog, then voltage values are shown in the heatmap.
Any		Allows you to specify the range of the heatmap that is represented using gradation. Enter the minimum value in the field on the left, and the maximum value in the field on the right. If you select PI (Impedance) in the Import Map dialog, then resistance values are shown in the heatmap. If you select DC (Voltage/Current density) in the Import Map dialog, then voltage/current density values are shown in the heatmap. If you select Common mode voltage distribution or I/O Coupling voltage distribution in the Import Map dialog, then voltage values are shown in the heatmap. Note If you enter a minimum value that is greater than the maximum value or a maximum value that is smaller than the minimum value, then these values are automatically adjusted to ensure that the maximum value is greater than the minimum value.
Show/Hide map		Allows you to toggle the display of the heatmap on the canvas in eCADSTAR PCB Editor.
	Show	If selected, then the heatmap is displayed on the canvas in eCADSTAR PCB Editor. Any changes that you make in the PI/EMI Analysis Heatmap dialog are immediately shown on the canvas.
Map displayed layer		Allows you to only display the heatmap for the active conductor layer in eCADSTAR PCB Editor.
	Only active layer	If selected, then the heatmap is only displayed on the canvas in eCADSTAR PCB Editor if it is associated with the active conductor layer. If not selected, then the heatmap is not displayed on the canvas in eCADSTAR PCB Editor unless it is associated with the active conductor layer.