To receive BOTH the Analog and Digital Canada Tv stations/channels.
Above the roof , install a Winegard HD7000R antenna with a Antennas Direct CPA-19 preamp aimed at about 320 degree magnetic compass reading.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
To receive the USA Tv stations/channels Install a Winegard HD7696P antenna with a Winegard AP8700 preamp aimed at about 150 degree magnetic compass reading.
These are 2 Separate antenna systems and Will Not be connected to geather on to one coax.
The 2 Separate antenna systems and coaxes will be separate all the way to the location of the Tv where the 2 separate coaxes will connect to a remote control A/B antenna switch ,
http://www.radioshack.com , #15-1968 , or ,
http://www.mcmelectronics.com ,
, #32-4425 . . Saveandreplay also has the same A/B switch that mcmelectronics has.
http://www.saveandreplay.com.