George O. Smith,
QRM-Interplanetary
(1942)
“ Burbank was himself again. The rebuff given him by Don Channing had worn off and he was sparkling with ideas. He speared Franks with the glitter in his eye and said: "If our beams are always on the center, why is it necessary to use multiplex-diversity?"Franks smiled. "You're mistaken," he told Burbank. "They're not always on the button. They vary. Therefore we use diversity transmission so that if one beam fails momentarily, one of the other beams will bring the signal in. It is analogous to tying five or six ropes onto a hoisted stone. If one breaks, you have the others." ”
