At my home I have a UTP cat5e cable with at least 50 meters that comes from the switch on my dad's office that occupies the same duct as the coaxial RF cable to my television when both arrives at my room's wall(from the roof). At least 3 meters of the cat5e cable works together with the coaxial RF cable. It is working well for the last 3 years, but now the internet is a little problematic at my room(just on my room, my dad's PC is fine). Somethimes it becomes really slow... doesn't fail completely, I can ping any internet address but there is at least 20% package loss. I already heard that it was not good to use both cables on the same duct but I have not given importance(I don't have another duct arriving on my bedroom).
So, now I'm wondering if something happends on the link or if is something "naturally" related to the television cable on the same duct.... Does someone had the same problem before? Do I need to install a STP or FTP cat5e cable?