i live in orange co/los angeles area, i've finally figured my hd channels are differant than my local sd channels, i seem to have fairly high reception, 70 something to 97 on ktla, but alot of the pix are bad, straight lines are zig zagy, some channels(7 abc) are horrible, is this a ant. prob(?) or is it my 6000 ota mod? how can i search for fix? anyone in disneyland area with advice would be great.