The Model 496-2C Video Signal Multiplexer, Video Combiner, doubles the transmission capacity of a conventional video channel by combining (multiplexing) two NTSC or PAL video signals or channels into one video signal, allowing the user to multiplex video signals. A Video Demultiplexer Model 497-2C at the receive-end of the channel separates the two combined signals for normal viewing or recording. The multiplexed video signal can also be recorded using conventional equipment and then played back for demultiplexing
The Video Signal Multiplexer output may be viewed directly on a video monitor. The two video channels appear side by side, each squeezed to one-half of its original width in order to fit together in a normally sized frame. Video inputs to the video multiplexer from line-locked cameras or analog tape must be time base corrected.