https://www.systerra.de/PC820.html
The PC820 is a high-performance, PCI Express card with advanced DSP capabilities and multiple I/O options. It supports one FMC+ VITA 57.4-compliant HPC FPGA Mezzanine Card (FMC)...
https://www.systerra.de/PC821.html
The PC821 is a high-performance, PCI Express card with advanced DSP capabilities and multiple I/O options. It supports one VITA 57.4-compliant HSPC FPGA Mezzanine Cards (FMCs) and one VITA 57.1 compliant HPC FMC site....
PERSIAN Datasheet (PDF)
https://www.systerra.de/downloads.php?dokument=10698