First, an apology. I am new to ADE XL and spectre, coming from hspice and MICA, so if I am asking a really obvious question, please pardon my ignorance. However, in my defence, this is stumping the local ADE XL expert. I have tried various searches of the forums and google without luck. So here goes:
Suppose I have a schematic with an instance of a cell (A) in it. In this instance, there is another instance of cell (B). Now, futher suppose that to test the recovery of a circuit from a particular un-toward upset, I need to reach through the heirarchy and manipulate the voltage on a net in B that I'll call z. I do not have z as a pin on either B or A, it is simply a labeled wire in B. How do I do this?
I've tried doing netsets, net expressions, declaring as global nets, etc. but either I am going it wrong, or it isn't working. And, while bringing this net out to a pin and then up through the heirarchy is possible, it would be a very ugly solution and probably cause trouble when this particular block is wrapped up for P&R. That is, the example I give here is very simple. The actual test case not so much.
I ask because were I running hspice from the command line, I would have a command in the control deck that looked something like this and be done:
gbreakB xA.xB.z vss vcr pwl(1) verr gnd 0,1e12 1,1e5 2,1 3,1e-5
That is, as I sweep verr from 0v -> 3v, I effectively short z to vss, causing the upset condition in B.