if their is a problem with your digital data your picture will not show up. because of the way the bits and data is stored is impossible for you to get only say a sub par picture from it. You will either have the picture or it will be either pix elated or a blank screen, you can amp it and un amp it all day long behind your tv it will not change the digital picture. If your carrier level is high on a digital band its the same as being to low, you will see a black screen or pix elation. if the bit stream is damaged before it gets to your DVR you would either see a pixeld picture or non at all, you will not see a degraded picture quality as far as image sharpness goes. Its an impossibility.