My tuner from pca shows the same effect as your one. The power bar is always much above the actual receipt. Even if I tune to a frequency where no station is broadcasting, I have at least two or three bars. And even if there is bad receipt of a station the power bar is full.
Could this be a hardware problem? (I don't think so, as I have double checked the assembly.)

For testing I (re)installed the orginal empeg tuner this afternoon. With this one I don't have this behaviour. I think the power bar corresonds to the actual receipt quality.
The overall receipt quality of both tuner are equal.

Has no one else this behaviour? Could it be that the pca tuner is more sensitively? Can this behaviour be changed in the player or withhin the hijack software?

The problem is that the sound output (bass, treble) seems to depends on the receipt quality.