Sam, I think you are getting confused. 100% signal strength does not guarantee 100% quality. I've seen 100% quality with 50% strength. I've also seen 20% quality with 100% strength. As I said in a previous post, signal quality is related to the number of errors corrected by the box - the fewer the errors, the higher the quality.SamRadford said:100% signal quality indicates that the signal strength is perfect. If you increase it you could overload the tuner (with the accompanying analogue signals) causing problems! You know the old adage - "if it ain't broke..."