I just bought a Vizio P75-F1.  I connected it to my Marantz SR5008 via HDMI which is also connected to my Hopper 3.  I can view the basketball game that is on right now, but my Vizio says it is 1080i.  The H3 resolution is set to 4K, 1080P, 1080i.  I tried turning off the AVR (it is set to 4K...