First appears in ST1, subtitled "Visual." Also appears in TKD p. 73 in anexample translated as "Visual (display)!", which is clipped from HaSta yIcha',meaning "Show the visual display!"

HaSta actually means "video," that is, moving (well, usually moving) visual images. When used by itself on a ship, as part of ship's jargon, however, it refers to the "visual display" mode of a jIH (viewing screen). 

HaSta jIH (television) is "video viewing screen," that is, a viewing screen that displays video. (Although HaSta jIH literally means the television's screen alone, it is used to refer to the entire device.) HaSta jIH much ("television show"), frequently shortened to HaSta much, is based on HaSta jIH (not on HaSta alone) and refers to what is presented on the television screen