It often refers to early TV sets that accepted signals from an antenna or VCR only via a coaxial cable. Modern TVs have coax inputs plus inputs that use RCA phono and HDMI cables. See F connector.
A two-wire (signal and ground) coaxial cable connector used to connect antennas and set-top boxes to TVs, VCRs and DVDs. F connector cables typically carry analog NTSC TV signals, and the plug's ...