If the apartment building is wood frame with wood or vinyl siding aim a Terk HDTVi (non amplified antenna) at about 235 degree magnetic compass.
Here is how to aim indoor type antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com.
If the apartment building is , metal frame work , concrete , concrete blocks , cinder blocks , bricks from ground to roof , big rocks for walls , stucko Wire , metal siding , metal roof , metal backed insulation , solar panels , then reception will be reduced or blocked.
Is the apartment , basement , 1st floor , 2 floor , what floor?? What floor number is the top floor??
What directions are the windows , patio , balcony ??
The Tv/s Must scan for the Broadcast Tv Channels sometimes named the 'Air Channel' 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.