How do I perform a Point to Point wireless site survey?
Initially, create a path profile using one of the various mapping programs. If LOS and Fresnel zone clearance seems good, check for trees and other unusual obstacles to LOS. A good way to check this is to place a person at each end of the path with a high-powered flashlight and a cell-phone. While talking with each other, flash the light so that the other person can see it. UHF hand-held radios (FRS or commercial frequencies) also work well to determine LOS. Use 1 watt radios for up to 4 miles and 5 watt radios for up to 15 miles. If results look promising, place a wireless access point at one end and a CPE at the other and try connecting using 19-24 dBi grid or panel antennas. (Do not swing both directional antennas at the same time!) Look for interference at each end by using a wireless spectrum analyzer and both vertical and horizontal polarized antennas. If you have Teletronics radios, here is a neat wireless site survey tool. There are also professional consultants (e.g. Cyber-Doc
