I just had a VIP 612 installed in a family room. I am able to get the same picture on TV #2 in an adjacent room through a coaxial cable - but the picture quality is non-HD. I am unable to run HDMI cable from TV #1 to TV #2 to get an HD picture on both due to lack of a crawl space/attic to pull the wire. Is there a way to convert the signal from the coaxial cable coming to TV #2 to HD quality?