|
Playing with the heights in the interactive tools may be entertaining, but it rarely corresponds to what I've observed when I actually put an antenna up in the air unless here is a clearly defined knife-edge diffractor. Since the modeling software in use here averages terrain in 100 meter square chunks, any expectation of actual accuracy based on a couple of feet difference in the entered elevation of the antenna is unfounded. The averaging of the terrain becomes the limiting factor for accuracy.
I usually recommend putting the antenna up as high as possible, then adjusting if needed. When folks ask me how high an antenna should be installed, I tell them "As high as it takes, preferably above any trees."
|