Steve, %>Max, the amount of immunity a cable has is dependent upon the type of %>shielding it has and how well it is connected to the case ground. I have gone %>through a whole bunch of gyrations with the cable vendors I work with (my %>other responsibility at this company is high-speed signal cable development) %>in order to build EMC-tight cables. %> %>If the cable is built and grounded well, then the likelyhood of a failure due %>to the effects of outside radiation is very low. %> %>Steve Chin %>StreamLogic Corp. %>Menlo Park, CA, USA %>
That's been my experience also with PC's, workstations. I haven't ever tested anything to a severe industrial level, though. However, I assume there wouldn't be a problem if the cables were well shielded and connected to the chassis. This raises another interesting question concerning the connection of the return to the chassis. Years ago I did a survey of a variety of monitor manufacturers to see if any of them used differential input. All of them said no. In addition, I have checked PC's and workstations from many manufacturers and never found any that didn't have the (video) cable return connected to the case. I assume, however, that without this connection of return to the cabinet, a system would probably flunk emission tests as well as immunity tests. Has anyone had any experiences in this area? Thanks, Max Max Kelson [email protected]
