User talk:DiffTransRR

embedded DisplayPort (eDP)has assigned different pin assignments than the 20p Display Port pin assignments shown for this topic. Typically a 30 position for 2 eDP Lanes plus Aux. or 40 position for 4 eDP Lanes plus Aux. since the eDP connectors also carry the LED Power/Control signals for the backlighting and the VCC/Control signals for the display assembly. The old discrete twisted wire called Twisted Pair generates more crosstalk and has more noise emmissions than the more popluar (since 2001) Small Gauge Coaxial wire contstruction. An external shield of metallized tape can be applied over the length of the old discrete Twisted Pair transmission line to eliminate the EMI noise leaks but the Twisted Pair crosstalk is much worse that the best performance differential pair transmission wire construction known as SGC. The most popular size SGC construction for carrying differential signals is SGC_AWG40. Each SGC wire has a shield (braided or spiral that creates a Farady Cage)and so they do not talk to each other until the braid-shield is removed when being terminated into the high speed eDP connectors. The eDP connectors are usually small and on a pitch of 0.5mm centers with a mated "Z" height of about 1.0mm. Applying the SGC into the eDP connector requires a Grounding Bar to which all the shield braids are attached acting as a natural strain relief. A shell is applied over the entire wire attachment area which provides a Farady Cage that does not allow EMI noise radiation. The SGC wire with the Grounding Bar connector construction has been tested at 10Gbps data rates with good performance results. Using two 50ohm SGC Wires, one for each differential polarity, with Grounding Bar/Faraday Cage connector construction has superior electrical performance and miniture mechanical size as compared to Shielded Twisted Pair constructed wire. Reference: I-PEX Engineering Reports for Cabline-VS connector (VESA Standard) I-PEX USA Technical Marketing greg.young@ipex-us.com Reference: Sumitomo Electrical Interconnect UL10005 80 C / 30 V AWM10005 40110 HPB Spec.# IHE8-07032A (SZ) --DiffTransRR (talk) 19:27, 1 July 2013 (UTC)