The problem with DirecTV is that they use a split LNB system. Dish Network uses a dual LNB that can pick up signals from up to 4 satellites at a time. The DirecTV setup on the other hand uses a separate LNB (the plastic thingy on the end) for each satellite
. This gets tricky for HDTV signals as everything must be aimed just right.
So to get HDTV on Dish you'd need to simultaneously hit 110 degrees and 119 degrees azimuth at 47 degrees elevation and 129 degrees azimuth at 37 degrees elevation. On an eliptical dish setup this is accomplished with the geometry of the dish itself. On an omnidirectional system like the KVH there has to be a the system has to be able to track and sync (both azimuth and elevation) for all of those satellites at once (and if you're with DirecTV an additional one).
One thing to remember is that if you are hooking all this up yourself you MUST
use the proper wire and connectors. You can't use regular cable wire. Both systems require RG-6 (or RG-6Q) cable. You cannot use the thinner RG-59 wire. The system will either give you only partial signal or will eventually fry itself out and potentially cause a fire. If you look on most wires, there will be some numbers on the insulation
. If not, look at the inside wire: RG-6 is about the thickness of an inkpen tip and will be fairly rigid wheras RG-59 is more like thicker fishing
line and moves around easily.
You'll also need to make sure all the barrels (the female-female couplers) are 2gz or above. You can tell this by looking at the plastic centre. They must be blue or red. If they are white, grey, or clear you have the wrong ones (900mhz).
Believe it or not, the way these systems are configured, the LNB on the end of the dish captures signals with really big waves and then shrinks them into a waveform that is only as high as the thickness of that RG-6 wire. The signal then travels through the wire and connectors to the receiver where it is split back into the larger form and processed to give you a picture.
So if you use too small a wire or connector anywhere along the way youcan create a fault or problem.