Chapter 3
Setting Up a Design
©
National Instruments Corporation
3-19
Net Group Settings
For net groups, the following
Group Settings
are available:
•
Group Name
•
Clearance Settings
•
Trace Width Settings
•
Trace Length Settings
•
Routing Layers
•
Routing Priority
•
Locked
As well as setting the clearance for a net group, you can set clearances for
individual nets within that group. You can, for example, set the clearance
for the net group to 10 mils, and the clearance for two or more nets within
that group to 5 mils. In this case, if any net from the group comes within 10
mils of any element that is not in the net group, a DRC error is generated.
If one of the traces that you set to a 5 mils clearance moves to 5 mils or less
from one of the other traces with the 5 mils clearance setting, a DRC error
occurs.
Note
Set individual trace clearances in the
Nets
tab of the
Spreadsheet View
. To do this,
select the desired trace, and locate the
Trace Clearance
column. Highlight
Use Group
Settings
and type in the desired clearance for that trace. You can also edit a trace’s
clearance from the
General
tab of its properties dialog box.
For information on any setting, select it in the
Group Settings
list. A
description appears in the field at the bottom of the dialog. You may need
to make the dialog box larger to view some of the descriptions. Do this by
dragging the dialog’s lower-right corner.
Part Group Settings
For part groups, the following
Group Settings
are available:
•
Group Name
•
Clearance Settings
•
Part Spacing Settings
•
Pin & Gate Swapping Settings
