A:Answer I have a similar arrangement with my TV transmitter locations, directly north and south from me. I receive from both directions, well
If your antenna is on or very close to, an imaginary line directly connecting the transmitters, one to the other, in opposite directions, you may receive both directions without having to turn your antenna, given that adequate signal strengths are available to your location.
IOW, if you had to turn your directional antenna in any other direction than in a 180-degree direction, e.g., 90-degrees, you may still have to turn your antenna to face the desired transmitter.