I just need a little help to know where i have to put the splitter, i got all the info i needed and the rigth equipment but when it was time to install i dont know what cable goes were. In my room i got cable modem too, i want ota to go in same cable if possible. Things i bought "Monster® 4-Way 2GHz RF Low-Loss Splitter for TV & Satellite" from radioshack , Terk HDTVo antenna. THX in advanced for your help, i got pics to show how my cables outside the house look.

Always split the cable first, before it goes to any of the end locations.

You can't combine a cable signal with an antenna signal.

If you have cable, it has the local HD channels in clear QAM. If you have an HDTV (or external set-top-box tuner) with QAM capability, you won't need the antenna.