Справочник Пользователя для National Instruments Ultiboard

Скачать
Страница из 281
Chapter 5
Working with Traces and Copper
© National Instruments Corporation
5-27
Setting Miscellaneous Net Parameters 
Complete the following steps to set miscellaneous parameters for a net: 
1.
Select Tools»Netlist Editor and select the desired net from the Net 
drop-down list in the Net edit dialog box. 
2.
Click on the Misc tab. 
3.
In the Routing Layers area: 
Select layers to use for routing copper for the selected net. 
Note
If the selected net is part of a net group, the Use Group Settings checkbox will be 
checked. Turn this off if you wish to make changes in the Routing Layers area. 
4.
In the Priority field:
Enter the routing priority for the selected net. “1” is the highest 
priority, “2” the second highest, etc. Leave as None if priority 
routing is not required. 
5.
In the Net Shielding area:
Select which Net
 
is used for the shield. Width becomes active - 
change as desired. 
Note
Shields are copper that is placed around a selected net to act as a buffer or to shield 
the net from signal interferance. 
6.
Enter desired parameters and click OK
Setting Group Parameters 
Complete the following steps to enter group information for a net: 
1.
Select Tools»Netlist Editor and select the desired net from the Net 
drop-down list in the Net edit dialog box. 
2.
Click on the Groups tab.
3.
Select the desired Net group from the drop-down list. 
4.
Optionally, to enter a group for a bus and/or differential pair for the 
selected net, click the Bus or Differential pair radio button and select 
the group from the drop-down list. These groups are created in the Edit 
Groups
 dialog box. Refer to the 
section of Chapter 3, 
for more information. 
5.
Enter desired group parameters and click OK