If you are hooking the receiver to your tv via coax you will never get a picture...the lower RG6 connection on the 360P is loop out for the dish. You will have to use either the s-video which most new hd tv's no longer have a connection for...the composite or component cables...I've used them all over the years...not real sure one is any better than the other picture wise...check the link below...they have HDMI to composite that may work pretty good...never tried it myself...probably could find one local if you wanted to try one.
Code:
http://www.dx.com/p/hdmi-to-vga-composite-3-rca-audio-video-cable-black-blue-green-red-185640?tc=USD&gclid=CNzJj6WvtcECFbNj7AodzWgAlQ#.VEHvDlzm4R9