You will not be able to utilize the PIP if you only have one receiver. You will need to either set up another receiver, or if you have an OTA antenna, you can use that for the second source.
According to the specs the 65H80 has a dual PIP tuner. What the heck does that mean, exactly, and how does one go about setting up PIP for one of these beasts? I've had it 2 years and never ventured into this realm at all. :b
According to the owners manual on my Pioneer RPTV you can use a splitter. Run one signal from the splitter to antenna A,run the other thru the converter to antenna B. I have not tried this myself so I can't verify the results. Good luck
But with direct TV don't you only get one signal from the box at a time? I always see the same picture on both sides, unless I use it to watch DVD and DirecTV at the same time. (have not found a use for this yet)