Do tv tuners have an input and output?

Question

when i get a tv tuner, i will have to take the cable out of my tv and plug it into the tv tuner, so i wont be able to watch tv while the cable is plugged into the tv tuner.

Answer 1

I assume you want a TV tuner for your PC.

You can get a simple RF splitter and split the cable input to both the TV and the PC (or even a cable modem).

There are TV tuners with an RF output as well (pass-through).