Engineering Tutorials

Co-channel interference results when another RF link is using the same channel frequency. Adjacent-channel interference results when another RF link is using an adjacent channel frequency. In selecting a site, a spectrum analyzer can be used to determine if any strong signals are present at the site and, if they are, to determine how close they are to the desired frequency. The further away from the proposed frequency, the less likely they are to cause a problem. Antenna placement and polarization, as well as the use of high-gain, low-side lobe antennas, are the most effective method of reducing this type of interference.