Paul and Carol,
Here is a picture that should be what you are describing.
The signal comes from the (park cable or satellite dish), this is the outside bulkhead connection to the jumper (loop) then up to the power box for the batwing outside antenna. Then from the power box back to the entertainment center.
Remember when you watch cable the green light on the power box must be off. Same when you watch satellite, the green light should be off.
If your satellite feed is single coax then you hook your dish to the blukhead connection.
You remove the loop and put your satellite receiver in it's place.
I suggest you hook a coax to the satellite receiver output and screw to one of the two coax connections. Turn on your TV (green light on power box OUT), put your TV to channel 3 (or appropriate channel) and look for signal from receiver. If none move to the other coax connector and try again.
Hook up the other connector to your satellite receiver input and it should work.
Hope this helps.
Good luck and let us know if you have more questions.