As of this morning my signal strength is a dismal 71-76. I live in west central Florida and usually my signal is 86 or so. the installer has been out 3 times and says I can't get a stronger signal than that where I live. There are no trees or anything blocking it. Do signal strengths vary that much during the day or is it something else. Dish is securely tightened no wind here or any clouds. may be I need to aim myself all I need to know is exactly where to aim.