I'm hoping the group's experience with home wiring can give me some direction. I have 5 coax drops on the second floor of my house. 1 has a good signal, but from the other 4 I get TV picture/sound, ...

This may not matter since I do not have cable TV, but I thought I ask just in case. I have a Antronix 3 way splitter. It has 2 outputs for -7db and 1 for -3db. 2 outputs will run to TVs and the third ...