Learning Forum

[lijunfang]

How to set differential prop parameters in ANSYS for extracting S parameters from HDMI PCB? HDMI is version 1.4, how to change these parameters as shown in the screenshot?

[Mrinmoy Bharadwaj]

Hello lijunfang,
Firstly, you do not extract S-parameters from a TDR probe. TDR probe is for looking at the trace impedance in the time domain. 
In case you meant extracting the TDR for your PCB, the pulse repetition frequency is generally kept 2 times of the pulse width. This is a general practice only.