Nov 13, 2012 #1 M mav1234 Junior Member level 1 Joined Aug 13, 2012 Messages 19 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Activity points 1,407 I have a 1G ethernet link which goes through three boards (Board1, Board2, and Board3). Board1 has to have diff impedance of 100ohm, Board 3 has to have diff impedance of 85 Ohm. (existing boards) Question: Is it better for Board2 to have 85 Ohm diff impedance??? or something in the middle like 92.5Ohm???
I have a 1G ethernet link which goes through three boards (Board1, Board2, and Board3). Board1 has to have diff impedance of 100ohm, Board 3 has to have diff impedance of 85 Ohm. (existing boards) Question: Is it better for Board2 to have 85 Ohm diff impedance??? or something in the middle like 92.5Ohm???