In this article, the author summarized his experience of many years, analyzed the picture segment in measuring, and raised a whole practical teaching system to train students' handling ability.

Its bandwidth of 428 kilohertz means a single segment can carry a bare-bones video picture, compact disc-quality audio, and text for news flashes, weather details and emergency announcements.

When enough information is combined to create a clear picture of a typical member of a segment, this is referred to as a buyer profile.