Roi - thanks for your question. I am going to move it to the HyperLynx specific community where it will have more visibility with subject matter experts. The Members Resources area is for general community questions and suggestions.
Probing at the die will account for Rx equalization including CTLE and DFE. To see the effect of DFE alone, you can turn off Tx FFE and Rx CTLE and keep on only DFE. The DFE signature on the signal is unique, and includes some abrupt voltage shifts in the eye density plots.
The result you see from the IBIS-AMI analysis in HyperLynx is the output of the RX. Actually, there is no option to explicitly view the eye diagram at the pins. You could effectively get the view at the pins by setting the RX options to do nothing. As Cristian alluded to, you can verify that the eye diagram is from the output of the RX by noticing the steps in the waveforms that look something like this.
Those steps are created by the DFE function in the RX.
Here is the eye density plot from our IBIS-AMI Channel Analyzer using Mentor_Tx_Channel_Mentor_Rx.ffs LineSim project and our Generic SerDes IBIS-AMI models, with FFE disabled, CTLE disabled and DFE enabled (15 taps):
In addition to that, in the last page of the wizard you can choose the "Extended" option from the dropdown list available for the AMI model debug info log. This will generate the impulse responses before and after Rx Init, that you can load in EZwave:
You will see the effect of the DFE taps in the impulse response after Rx Init.
Moreover, in the Reporter's window the values of the normalized DFE taps are displayed:
Hope this answers the question.
your answers were very helpful.
If you really want to probe at the pin, you can add a dummy differential symbol (no model assigned to it) and select it in the dropdown list of the receiver probe:
You will note that in the "Configure AMI Models" page of the wizard the "Configure Rx AMI..." button will be grayed out because there is no model assigned to this symbol.
Here are the results without DFE:
You can now compare the two eye density plots and notice the difference.