I'm very new at this stuff. I have a Dish 500 with 811 receiver. I wanted to get a directional OTA antenna for local HD but don't want to run another coax into the house. I tried the clip on one but the direction of the local signals are not the same as that of the DISH. The LNB has 2 coaxial cables that go into my house presumably to my two receivers. And there is another terminal labeled "LNB in". Is this where I would connect an OTA and use a diplexer at the receiver? :shocked