Re: [PSES] DVI-D drivers and displays

[Pawson, James]

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. 360º 
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:gary.mcintu...@esterline.com]
Sent: 19 September 2012 20:59
To: EMC-PSTC@LISTSERV.IEEE.ORG
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.
Grr - 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
gary.mcintu...@esterline.com<mailto:brian.s...@esterline.com>


www.esterline.com/interfacetechnologies<http://www.esterline.com/advancedinput>

Technology, Innovation, Performance...



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http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

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[PSES] DVI-D drivers and displays

[McInturff, Gary]

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.
Grr - 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
gary.mcintu...@esterline.com


www.esterline.com/interfacetechnologies

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 


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 
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: