My PCB will accept an RJ45 connector, and those traces will run over the PCB to the flex jumper, then through the flex to another PCB.
I want to optimize the layout of the traces through the connector to reduce crosstalk, both between signals and alien. As we only need 8 signals (4 differential pairs) we have plenty of room for grounds. Here are 2 configurations I've come up with as options. My question:
Which configuration is best from a signal integrity perspective?
- Another configuration I haven't included.
- It won't and doesn't matter.
- Impossible to say without testing.
Config 1 keeps DPs as close as possible, isolated by GND. Config 2 spaces all traces with GND between them