'Marking device on screen television receiver Graphic messages transmitted by videotex System.

摘要

Videotex Presentation device.Basically includes: Data separator (7); DEModulator; Data Memory page (8) (22); character Generator (23); Switch (5); Circuit (20) keyboard Management; service definition; (21) generator internal synchronization separator Circuit; Broadcasting Network (36); Means of command Sweep Phase media; subordination; and switching means Scanning.