The link below explains in detail the required conversion to narrow band that has been mandated by the FCC.  Our irrigation system at Richter is 100% wireless and a complete conversion is required to ensure that come next year we are able to continue irrigating the course. We are currently experiencing bleed from the westside campus at Westconn so this problem of crowded airwaves is a problem that hits close to home.   We have started the process of getting new narrow band radios and will update repeater and satellites in the fall to minimize any potential communication issues.

To further explain the way our system operates, we have a main central irrigation computer. The computer is the hub of all information from the hydraulic tree to sprinker information. This main computer also has our soil sensor information to read % soil moisture, temperature and salinity in real time.  Connected to this computer is a base station that sends signals wirelessly directly out to the field satellites.  From the field satellites we have each individual sprinkler head hard wired with power from the satellite to operate it nightly.  As the airwaves get more congested the signals from the repeater to the satellite get interupted causing improper irrigation cycles to run when requested.  We also have the ablitiy to irrigate from our radios.  In this way we enter a code from our radio that goes to the base station and then out to the satellite. 


http://digitalgcm.gcsaa.org/DigitalAnywhere/viewer.aspx?id=36&pageId=54