Thanks for the information.
Having three consoles that still use the coaxial jack of my television and nothing else that does, I've just been keeping a F-type connector screwed on to it and switching cables when changing between them.
Nice to know I can dig out a splitter and just have it happen automatically rather than switching cables around everytime I want to play one of the other two systems. I even have a three way splitter stored away and a couple more F type adapters, so I'm all set with what I'd need.