What I do is got to a sat in the west and see if the dish needs to go up or down to get a better signal (I lightly press up/down on the dish with my hand to see if I get a better signal).
Then do same thing with an east sat.
If both east and west need to go up, then the arc adjustment needs to go down and the dish elevation up.*
If both east and west need to go down, then the arc adjustment needs to go up and the dish elevation down.*
If east needs to go up and west needs to go down, then I rotate the whole works on the pole toward the east.**
If east needs to go down and west needs to go up, then I rotate the whole works on the pole toward the west.**
* To make the arc adjustment, I first move the dish back to my due south satellite and get a signal on my coax attached signal meter. Then I adjust the arc just a little, then adjust dish elevation the opposite until I get a perfect signal on the south satellite again (perfect up/down = pressing with hand on dish to go up gets lower signal reading / pressing with hand on dish to go down gets lower signal reading).
** Before rotating the "whole works" on the pole, I use a pen or pencil and make a little mark on the pole and the clamp which is attached to the pole. Then I can always move the dish back to this position. So my marks would look like this before moving anything...
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Then I move it slightly and it looks like this...
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Then I check my east west sats again. If it got worse, I realize I moved it the wrong direction, but with the marks there, it is easy to go the same amount the opposite direction.