Based on my experiences with HDMI I've found the high speed TMDS interface used on DVI (and HDMI) can be very difficult to control indeed.
Cable backshell shielding is critical to low radiated emissions. 360ยบ continuous shielding between cable shield and connector shell is required. Finding a good cable is often a case of trial and error - once yo do it is worth buying several as they can wear out and change characteristics with heavy use. Sometimes common mode noise on the differential TMDS pairs will cause problems that even a good cable won't fix. High speed common mode chokes on the diff pairs are required here. Happy hunting James James Pawson Leading Hardware Engineer - EMC EchoStar Europe ________________________________ From: McInturff, Gary [mailto:[email protected]] Sent: 19 September 2012 20:59 To: [email protected] Subject: [PSES] DVI-D drivers and displays Does anyone else have as much trouble with these monitors as I seem to have. One could almost cook popcorn on top of some of the monitors we have for the lab - makes trying to measure the stuff we are generating difficult and annoys all to heck. Using a computer with an expansion bus card driving the monitor. They are both brand name pieces of equipment, but I get 40 MHz multiples that can be above class A all over the place. I've had to run this type of video in a couple of different applications, with different monitors and get pretty much the same response, the cable itself is hotter than heck, but again not something I can control - well I probably could but then I end up with a "lab queen" support computer. Grrrrrrrrrrrrrr - anybody else having similar problems Gary McInturff Reliability/Compliance Engineer Esterline Interface Technologies Featuring ADVANCED INPUT, MEMTRON, and LRE MEDICAL products 600 W. Wilbur Avenue Coeur d'Alene, ID 83815-9496 Office:208-635-8306 Cell: 509 868 2279 Toll Free: 800-444-5923 X 1238 [email protected]<mailto:[email protected]> www.esterline.com/interfacetechnologies<http://www.esterline.com/advancedinput> Technology, Innovation, Performance... - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
