Справочник Пользователя для National Instruments Ultiboard
Chapter 1
User Interface
© National Instruments Corporation
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Degree Step—This field becomes active when Polar Grid is
selected in the Grid Type field. Enter the desired distance
between the grid’s elements (dots, lines or crosses). Select the unit
of measure in the drop-down list to the right of this field—choices
are: degrees, radians, or grads.
selected in the Grid Type field. Enter the desired distance
between the grid’s elements (dots, lines or crosses). Select the unit
of measure in the drop-down list to the right of this field—choices
are: degrees, radians, or grads.
•
Grid start offset—This field becomes active when Polar Grid is
selected in the Grid Type field. Enter the distance to offset the
center of the polar grid: X is horizonatal offset; Y is vertical offset.
selected in the Grid Type field. Enter the distance to offset the
center of the polar grid: X is horizonatal offset; Y is vertical offset.
3.
Click OK to close the dialog.
To show or hide the visible grid, select View»Grid.
Copper Layers Tab
Use the Copper Layers
tab of the PCB Properties dialog box to determine
the layer pairs that are acceptable for blind, buried or micro vias. This is
used when you try to place a via. Your choices will affect the cost of the
board, and should be confirmed with the board manufacturer.
used when you try to place a via. Your choices will affect the cost of the
board, and should be confirmed with the board manufacturer.
This tab also allows you to set the default clearance for the board—the
distance from the edge of the board that is to be kept free of any other
elements. For example, if you try to run a trace through a clearance, or try
to place a part so that a pad is put within a clearance, a design rule error
occurs.
distance from the edge of the board that is to be kept free of any other
elements. For example, if you try to run a trace through a clearance, or try
to place a part so that a pad is put within a clearance, a design rule error
occurs.
Note
If you used the Board Wizard, the layer information and clearance may already
have been set. Refer to the
, for more information.
Complete the following steps to set up the Copper Layers tab:
1.
Set the number of layer pairs you intend to use by entering the value or
using the up/down arrows in the Layer Pairs field. There should be at
least one layered pair to act as a core.
using the up/down arrows in the Layer Pairs field. There should be at
least one layered pair to act as a core.
2.
Set the number of Single Layer Build-ups for both the top and
bottom. There should be at least one layered pair to act as a core.
bottom. There should be at least one layered pair to act as a core.
3.
Select the Micro Vias, Buried Vias, or Blind Vias checkboxes to use
these in your design.
these in your design.