We are currently in the process of designing a new PCI bus video card. This card has 1 video D-Sub port. We have seen application notes indicating that the best way to minimize potential radiated emissions from this port would be to tie the D-Sub connector shell (chassis) to the logic ground on the circuit board. Thus minimizing the ground return impedance. However, our experience has indicated that we perform better (EN55022) when this D-Sub Shell (chassis) and the logic ground on the PCI card are separated.
I am interested in what you folks think about this particular problem. Any responses would be appreciated. Thanks in advance for you replies! Please contact me if you have any questions or comments! Thank you! Robert L. Terry [email protected] 313-994-0591 Ext.235 Fax: 313-994-8408
