Gene Roddenberry's point about technobabble was that, in real life, people don't stop to explain how their everyday tools work. For example, the opening scene of Forbidden Planet has some technical-sounding jargon which isn't explained to the audience because the characters know exactly what they're doing and what those terms mean. The alternative is to make a character the "designated idiot" -- the outsider who needs all the technical stuff explained for the audience's benefit, like the radioman in Destination Moon.It's been a long time since my college TV production classes, but I think it's a basic principle in filmmaking that stuff should be shown visually when possible, instead of explained in lengthy dialog or even with written titles on the screen.
EDIT: I see Lance already covered much of the same territory.