I don't know if I can help you there, I literally just plugged it in, guesstimated 7deg off of true S based on the wall being lined up E/W, and tried it. Bingo dingo, moving pictures appeared on the magic box. The troubleshooting was nil.

Are your broadcasting towers clustered in one spot like ours are? If we were in the city, we'd have to use an omnidirectional antenna instead of this unidirectional design.