I agree with Brian, i have never used a meter, i just use a set top box, and dish pointer, first thing first you have a lot of steel there is the main pole level both ways ? this is a must no cutting corners here,
Is you motor at 0 degree if not send it to 0. you will still get 0.8 W with the motor at 0 to start with, look where your dish should be pointing and find a land mark, look under the dish and line the lnb arm up with the land mark input the TP that Brian mentioned into the box and leave the box on that TP with the signal strength showing then move the dish slightly left then right until you see movement on the signal meter on your box.
Near as dam it you lnb needs to be pointing in this direction to start with all the above in place.