Stratix 10 L tile Native PHY unable to receive incremental data sent from TX and tested using FMC loopback card

Hie, Its good news that you can receive the signal correctly. Yes, since you are using PCS direct, there is no word aligner hardware available. Hence, you will need to implement word aligner in the fabric. As for meeting timing in Stratix 10, we have a document to guide you. https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/stratix-10/s10_hp_hb.pdf Please refer to section 2.3 and 2.4 mainly. Please let me know if you need any other information. Regards, Nathan