The Tv/s MUST Scan for the -> Digital <- Broadcast Tv Channels sometimes named the 'Air Channels' or 'Antenna Channels' in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT scan for cable Tv channels.
Aim the ANT751 antenna at about 155 degree magnetic compass.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html
If the Tv or Tv,s will not receive the Digital Broadcast Tv Channels here are some converter boxes.
Channel Master has converter boxes ,
http://www.channelmasterstore.com.
Walmart
http://www.walmart.com
, has 3 converter boxes.
RCA DTA800B1.
Sunkey ATB150S.
Magnavox TB110MW9.