Hello, I am a new member but long time DirecTV customer. TLDR - I cannot get signal lock while aligning my new dish. I am currently using a Slimline Dish with a SL5 LNB. It is mounted on the fascia on the back corner of my house, which happens to be the lowest point of the roof. It has been there for 21 years (second dish, same location). And unfortunately it is now pointing directly into my neighbors tree which has grown over those 21 years. I now get frequent dropouts and 771 messages. Wind or rain take me out completely. I ordered a new Slimline Dish and SL5 LNB, so that I could mount and tune the new dish, and then cut over to using it. I am mounting it higher on the roofline 30 feet over from the current dish. This gets me past the tree. I have to use the actual roof because the side of the house with the correct facing is all gutter down the side. We mounted the mast and it shows dead center on the bubble level. So we started trying to tune it using an AIM 2.0 meter. No matter what I do I cannot get signal lock. The meter said I needed 225 Azimuth, 39 Elevation, and 64 Tilt. In that position with minor adjusting the meter gives me -21 constant with -17.2 peak. In the AIM manual and in example videos I watched all show signal locked at lower readings. Any adjustments I make drop the signal. I have not moved on to trying to use the fine tuning to dither because it appears I need a signal lock for that. Any suggestions on what I am doing wrong? I have not taken the DirecTV training as I am not an installer and it is not available to me. I must be missing some step. Thanks for the help.