Sony Corporation of America. Sony Video Communications, Preliminary Information packet. Includes information on SMC-70G Genlocker (Microcomputer with Genlock Capability) with Features of Video and Microcomputer, all-view photos, and Specifications. Also SMI-7073 RGB, SMI-7074 NTSC Superimposers. Page 1: front panel view of the SMI-7073, 3-D view of SMI-7074. Page 2: Specifications. The Sony Superimposers are modules that plug into the SMC-70G enabling character or graphic data generated on the Genlocker Microcomputer to be superimposed on video signals.