Hi, Kit Kat. Not withstanding Rich's kind words, a lot of what I know about the television engineering aspect of the business I learned from the TV engineers at The Weather Channel.
My education was in electrical engineering, but prior to TWC my work and my passion was the analysis and design of computer based systems. Most of the innovative technical work at TWC was at the intersection of television technology and computer technology. I also had been fascinated by TV technology since my early teen years. (I worked in a TV repair shop the summer between my junior year and senior year in highschool.) So I learned the TV stuff on the job from some very sharp people.
I was never directly involved with the green wall. But I was involved with digital keying in the design of The Weather STAR which had to be able to "key" local weather information in the form of text (and later, weather icons) over TWC video to show local sensor / observation data at the bottom of the screen during network programming.
Wow so you were part of the group that worked on the 4000 and lower models? I am still amazed by how you all did that considering the times. Its really amazing!! I picked up an old 4000 for fun to see the design. Quite remarkable!