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I haven't yet taken the time to take my measurements on my cable but Molex sent me a measurement report of the S-parameters : As you can see, they connect the GND Aluminium shield to the GND between differential signals... I'm going to have to do some welding, it's bothering me... Do you think this has an impact on the characteristic impedance value to connect the SHIELD Aluminium plane to GND or not ?


Another thing that bother me is that they don't want to give me the s-parameters files son I cannot get the temporal S11 to calculate the caracteristic impedance along the line...


I will try to make simulation using Aluminium SHIELD as supplementary plane GND and see if I can obtain results consistant with molex's results.

 


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