Our 8900GEN-SM sub-module attaches to a synchronizer module and provides a reference input for the host synchronizer module and their GeckoFlex modules via the frame-reference bus (if the module is mounted in slot 1 or slot 3). You can attach a second sub-module to another GeckoFlex host module to provide a redundant frame reference or a reference of a completely different signal format. Note: at least one module per frame must have a genlock sub-module installed to provide reference bus support.