A system is provided that includes a control panel of a security system, a memory of the security system having a reference frequency hopping pattern and a reference frequency offset saved therein, a plurality of wireless threat sensors that communicate with the control panel using the reference frequency hopping pattern and a fixed frequency offset for each frequency and each hop of the reference frequency hop pattern, wherein the fixed frequency offset is an integer multiple of the reference frequency offset, and a processor of the security system that detects any nearby security systems that use the reference frequency hopping pattern, determines the integer multiple of the reference frequency offset used by each of the nearby security systems, and sets the fixed frequency offset used by the plurality of sensors at a selected integer multiple of the reference frequency offset that is not used by any nearby security system.