Critical decision-making is necessary for the development of a Digital TV deployment project. The first is the choice of propagation model. The modeling is inserted as an element able to describe mathematically the behavior of the electromagnetic wave, as well as its losses. From this it is possible to establish coverage criteria, but are required analysis parameters of the same, to be chosen by the designer. Another aspect to be discussed is the importance of crossing the coverage data with field measurements. Finally, we will deal with the SFN network and gap-filler as a coverage optimization solution, with case studies.