My wife and I like to watch This Old House on PBS which is one of the local stations we get. It's wierd that we get ch 26 which is in Virginia instead of ch 4 which is in Chapel Hill only 30 minutes away. Anyway the signal for all of our local stations comes in at 60hz while the PBS station is 24hz. We get a lot of blurring when there is movement. I've tried making adjustments to my tv and it may have helped some but there is still blurring. We even get a sub channel, 26-2 that comes in at 60hz but it is sd I think. Is there anything I can do to fix this?