Right now I am trying to setup a cable connection with my hdtv so i can catch the US Open in high def but for some reason i end up with a weak signal for CBS. Sometimes it's even unwatchable. I have a 3-way splitter and a 4-way bidirectional splitter connecting three television sets and a cable modem. NBC, FOX, and PBS are fine. ABC gives me the same problem as CBS. Is there anything I can do on my end to fix this or should I call the cable company?