On Fri, Jun 16, 2017 at 8:03 AM, mike.v...@gmail.com <mike.v...@gmail.com> wrote:
>> > . Cut the pads tight a little shorter and place the via's to the right >> > creating a bottleneck but stil far enough from the edge >> >> possible. >> >> > . The above but to the left, via's in the middle. >> >> possible but risky. >> > > Depends on how near to can get to left hand pads or the egde on the right > and were the pads in the connector have most tolerance. > > Speaking of near the edge. The tracks on the board seem awfully close the > boards cutoff edge. yyep they are. > Doesn't that create a problem for cutting them out? no but it does cause an imbalance in the differential pairs unless the tracks come in dead-straight from the left, and it also means that ground shielding isn't possible. normally the connector would be at least 20-30 mil away from the edge so that ground vias could be placed all along the right-hand edge. that's near-flat-out impossible. the best that can be hoped for is that the three pins (in grey) which are GND will do the job of creating an EMI shield instead. l. _______________________________________________ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
