I really hate feeling ignorant. Other CAD packages I have used have a part available to connect two different nets together without creating a DRC error - such as tying a digital ground and an analog ground together near a data converter. I have tried going through the on-line manuals, searching through the editors, etc to no avail. Does Allegro Design Entry CIS/Allegro PCB Desiger support this function? Thanks in advance for any help you can give me.
Oops. I forgot to state that I am running version 16.3.
There's a netshort property that you can apply. Select the shape or pin or via that you need to short and use Edit - Properties then select the part and then add the net_short property with a value of net1:net2.
Take a look at http://www.parallel-systems.co.uk/images/PDF/Netshort_Definition.pdf
Sometimes what I will do is show the Agnd to Dgnd connection on the shcematic using a jumper symbol or 0 ohm resistor. Then use a footprint that has the two pins shorted together. Works well if you are doing the tie in on outer layers. If you need to do it on internal layers this obviously won't work. Steve's suggestion will.
I have used the net short property on several designs and it does work in Allegro version 16.6.
The have stopped using it, because the net short property is not transfered to ODB++.
Doing netlist checkes in a third party gerber viewer comes up with net shorts, not a good thing.
Perhaps this may be fixed in the future?