The FMC Loopback Module is a passive plug-in adapter for ANSI/VITA 57.1 FPGA Mezzanine Card (FMC) connectors. The loopback board is designed to mate a High-Pin Count (HPC) connector, but also fits without restrictions to Low-Pin Count (LPC) connectors. According to the FMC standard, all signals of the connector are connected by the mezzanine board as loopback.
FMC HPC Connector 
FMC Loopback Module Top Side 
FMC Loopback Module Bottom Side
