Ah yer,one was speaking of the way the old kit like VCRs worked they took the RF IN from the antenna and combined a separate UHF channel upon it carrying the output from the tape and sent it out at RF to be demodulated by the TV,the latest VCR I have(never used now)does not have the tape output at UHF the AE in and out is just a loop through the output from the tape is just available on the scart socket.
