For some reason I am only getting radio for about 2 miles. Last week, I was getting 5 miles. I have a survey style set up that I haven't changed at all. I have tried two different TDL 450's and they are both only getting 2 miles. The TDL 450's are both set up the same as I've always had them set. Are there any other settings that would limit radio that aren't in the survey styles?