09-13-2016, 06:04 PM
(09-13-2016, 10:52 AM)martinayotte Wrote: The kind of scope can be relevant too ...
In my case, I can't trust my scope since the ripples can be high frequency and my scope won't be able to show them !
This ripples is high frequency and we thinks the inductor causing this. This finding comes out when we help to debug that similar board that also suffer on the GbE but works on 10/100 Mbps which their previous revision board doesn't have this issue but current revision board suffer. After compare both previous and new revision schematics and the inductor different. Once short that particular inductor, the new version on that board able to work on GbE. We thinks the Pine64 board may be in same situation and we currently try to collect enough GbE issued boards to check on this finding.