Clarification needed for PCIE data/clock pair route

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

I need clarifications:

  1. If I route the data pairs to PCIE connector, should I use AC cap or not?
  2. If I route the clock pairs to PCIE connector, should I use AC cap or not?

Thanks.

3

If you look into Xavier NX OEM DG in DLC, you will find below info:

AC Capacitors required on RX lines on carrier board if connected directly to device. They should not be on the carrier board if connected to PCIe connector, M.2 Key M, etc. In those cases, the AC caps are on the board connected to those connectors.