[be236]

Assuming your assemble is "plumb," go by the measurement on the back of the dish, at the edge of the metal bar that slides thru the readings.

Also, this is a biggie that got me when I did my first install: Set your Fortec dish 5 degrees higher! So if you're supposed to be at 30 deg, set your elevation to 35 deg. This should get you IA5.. This one step got me my signal.. before that I couldnt get any signal at all.