The thing is ...
You amateurs who just do a search on Google for answers on issues like this that you don't know a lot about, do not realise that for most people, it is really important to have a good and properly aligned antenna with decent amplification for digital terrestrial signals. A lot of people live at the moment in what is called a "fringe" area which requires a proper setup. Old 50 ohm downlead, passive splitters, joined-up-with-tape downlead all produce degradation or noise in the signal. You will have problems like have been asked about here before.