On Fri, Aug 18, 2017 at 5:51 PM, Richard Wilbur <[email protected]> wrote:
> You bring up an interesting point: what other current return paths are in > the same vicinity? I have not analyzed that in any detail. At least there > are no other lines from signal source to signal sink that I know of that > cross the region of the board where the high-frequency HDMI signals are > routed. Also, to my knowledge we don't have segmented or restricted ground > planes that would isolate regions with a higher-impedance reference. CEC etc. all follow roughly the same path, on layer 3 (separated by GND). i just noticed that SD0 runs round the back of the HDMI 1st set of VIAS (with no GND separation) on layer 3 - i've removed the SATA power (not being used) so i can shift them up a bit some GPIOs cross on layer 3 as well, just near the GND shielding near those first vias... not much. l. _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
