i am an otr truck driver, every time i move to a new location i have to set up my channels on my tv. ive been doing this for over a year and last week i set it up differently in that i set up chdtv/tv instead of chtv. since then everything i pick up is not clear and i have tried to go back and set it up like it used to be and i havent been able to get it done. can u help me?