I have a HDTV I am using as a second monitor. The first monitor, is a real computer monitor, not a TV and has a fantastic image.

The second one, the HDTV has a good image, but it is a little bit blurred and has the problem you can see on the picture below, a kind of red halo around the edges. I think it has something to do with red contrast. Other colors show this problem too, specially the green.

The problem is that the TV has no contrast adjustment. Instead it has something called IRE 10 points and IRE 2 points.

Taking IRE 10 for example, it has 4 controls for each of the 10 points: luminosity, R, G and B.

I could not find a page where I can understand what this IRE is and how should I adjust this.

Can someone tell me how should I proceed to calibrate this TV for best picture?

thanks for any help.