i have a pro930 hd and a motorola dvr from comcast. it is connected to the tuner with component video cables into "input 1" and the cable is split to ant B for picture in picture and everything works great. my question is "can i get rid of the splitter and ant B and come out of the dvr with component cables to input 1 and a coaxial cable from the dvr to ant "a" and get my picture in picture? will i get high def from both input 1 and ant A at that point? thanks