The Contemporary Research 232-MCT is an economical RS-232/IR controlled video tuner featuring mono audio, 125-channel access in CATV, HRC, or IRC modes, closed captioning, and a pass-through AV input. Fully programmable, the unit can restore all settings on power-up from non-volatile memory. A list of accessible channels, called channel rings, can be stored in memory, used for convenient channel up/down control and to control direct access to unlisted channels. Switchable inputs for NTSC video and mono audio are included for display of PC graphics, a character generator information channel, camera or other A/V sources.