Only updating an older DTV system or using a dome with a newer receiver would require the SWM8 system linked to above.
For most users, the SWM hardware is in the LNB on the antenna itself. The newer Genie receivers even have the Power Inserter built in but he may be searching for the power inserter but since we really don't know what antenna and receiver combo he is using it's impossible to answer. The type of coach he has and if the antenna was factory installed would also help.