Xio2213B test issue

Hello,

This skew issue is probably related to layout.

Regards.

Dear Sir Thank you so much!! We have test again and the Differential Skew always in -39  ~ -40 ps .

Could you help to check Will we need to add PCB trace length on TPA+/- or TPB=/- ??

We will modify out PCB layout in this week. thank you for your great support. 

Hello Kerr,

Could you post an excerpt of the compliance test you are failing? I want to know what is the test doing.

Adding PCB trace will add delay as well.

Regards.

Dear Sir

        the file is test report

Net Name:            TPB1-
Total etch length:      1305.7 MIL
Total manhattan length: 1500.95 MIL

Net Name:            TPB1+
Total etch length:      1305.83 MIL
Total manhattan length: 1445.89 MIL

Net Name:            TPA1-
Total etch length:      1264.72 MIL
Total manhattan length: 1392.24 MIL

Net Name:            TPA1+
Total etch length:      1264.04 MIL
Total manhattan length: 1392.7 MIL

Hello,

The total etch length looks correct, however there is a big difference in the manhattan length, this tell me that you have to route the pairs as much coupled as possible, I mean, the separation of the two pairs must be constant all the way.

Minimize the number of vias as much as possible.

Avoid 90 degree angles.

Regards.