A system includes a group of transceiver nodes and diagnostic circuitry. A first transceiver node of the group broadcasts one or more beacons which a second transceiver node of the group attempts to receive. The second transceiver node provides a reception indication to the diagnostic circuitry. Based on the reception indication, the diagnostic circuitry determines a radio performance change for the first transceiver node and/or second transceiver node. Using a change threshold based on a distribution of radio performance changes for the group, the diagnostic circuitry may determine whether to generate a change indication for the first transceiver node and/or second transceiver node.