DEVICE FOR SHAPING PROGRAMMED TEST SIGNALS AND TELETEXT PAGES Russian patent published in 1997 - IPC

FIELD: television engineering; measurement of additional information analog and digital signals; checking decoders of teletext transmitted as part of TV signal. SUBSTANCE: device shapes test signals enabling estimation of true transmission of additional digital information, compatibility of additional digital information of teletext type with audio signal when they are transmitted simultaneously, measurement of close and distant repetitive signals in image channel. Test signals shaped in device are used for visual estimation of serviceability of teletext decoder and through channel for additional information digital signal transmission. Device functions both when full color TV signal is present and when there is broadcasting television radio signal. EFFECT: enlarged functional capabilities. 5 dwg