Radio Noise From the Early Universe

In 19 55, a frenchman named emile le rue made a measurement of radiation from the sky. And he found this source of radiation at just the right frequent which we now understand was the c m b. He just didn't understand what it was, and nobody recognized it. So that's kind of the picture that sets up the discovery. There was this light out there when we didn't think we could see it. And also, we were just discovering, you know, the radio spectrum of signals out there in space. so then how did they finally put the two together?