NO antenna rotator required.
Ok , All of the Networks and many more Tv stations/channels Will Be Received With one antenna aimed at about 340 degree magnetic compass.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Install a Winegard HD7696P antenna with a Winegard AP8700 preamp Above the roof.
Here are some above the roof antenna mounts,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.winegarddirect.com ,
http://www.amazon.com.
For one Tv connected use no splitter.
For 2 Tv's connected use a ,
http://www.holandelectronics.com , also available at ,
http://www.solidsignal.com.
HFS-2D , 2 way splitter.
For 3 Tv's connected.
HFS-3D , 3 way splitter.
ALL of Networks , NBC , CBS , ABC , FOX , CW , MyNetwork , PBS , ION , and many , many , more channels will be received with the HD7696P and AP8700 preamp aimed at about 340 degree magnetic compass.