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.