Do you like this better?
http://www.skywalker.com/itemdisplay.aspx?item=226167
The brackets can be mounted below the peak if the direction toward the towers is not aimed through the roof. You can cut off the mast if it's too long.
The 2001C may be a little weak for DTV. Try this one instead;
http://www.skywalker.com/itemdisplay.aspx?item=9385