Using single line technology, you would have one coax from the dish. Depending on how many receivers you have and locations, the following would be someplace:
A power inserter that the coax goes to and plugs into AC power. You must have this, so no matter what you would have had one of these.
One or more splitters. Coax from the dish (or from the power inserter) goes to the input of the splitter, and coax from the output of the splitter to various tv locations.
The power inserter could have been between the dish and the splitter, or between the splitter and one of the TV locations, or could have just been off the splitter without another coax going to a tv location.