|
The way I understand it QAM which is the transmission scheme for the I Q signals was invented by Philco...They probably wanted to charge RCA patent royalties and RCA didn't like to pay others for patents.
RCA was experimenting with dot sequential. Switching which primary was being fed down the monochrome carrier at very high frequency and trying to have the reciever switch which gun was driven by the monochrome signal in sync. I don't think they ever got it to work well and jumped on QAM when it was invented.
|