DS80PCI402: whether distance between the PCH and Re-driver can be 20inch （20000mils) of DS80PCI402

Part Number:DS80PCI402

Hi team,

My customer want to use our DS80PCI402, but they don't know whether distance between the PCH and Re-driver can be 20inch （20000mils）. Could you please help check whether it's ok and how to decide it?

Thanks.