hal26 This may help you.....
Your DVI connection is the best you can get to go to your DLP. You can purchase a switch box for this connector if you decide to use it on both. Component is the second best connector out there. You can achieve all resolutions currently possible with either DVI or component. The only drawback for you using component is that the digital video signal is being converted to analog and your television has to convert this back to digital to view it. Component is best used on tube televisions or CRT projections whose internal workings (i.e. cathode-ray tube) is actually analog. Any connector below that of component will not achieve even 480 interlaced! S-video is at best 400 lines of resolution. I've got an analog 35 inch (not talking about internal workings but signal wise in comparison to an HD-Ready set) and I use component on it to get the best picture quality. I realize it may be only 80 extra lines I'm seeing because my television can't do more than that capacity, but I do also enjoy more vibrant colors and contrasting. Another thing I forgot to mention is that S-video and other connectors below that will only do interlaced. DVI, component, and variations of DVI (i.e. HDMI) will only do progressive scanning signals.
Okay, now to your receiver.......The only connector you'll need to connect to your antenna line is on the far left if you're looking on the front of the unit or the far right if you're looking on the back of the unit. It's a single coax connector that is built in the little box that is plugged into the receiver. I'm not talking about the diplexor. I'm talking about the small antenna cartridge. You'll know what it is because it is grey with a little finger hold on the box to remove it. That's the only connection you would want to make unless you want to connect your phone line to see who is calling while your watching your OTA channels through the on-screen caller I.D. feature. The only connection I have on my unit is my component cables and my antenna line. I decided to remove the satellite line, since it serves no purpose now. It does get signal strength (about 72 decibels to be exact) but 0% signal quality. Of course in the world of signals, strength means nothing without quality to back it up. Anyways, that's all I have to say and I hope this helps you out.