I've been hearing some testing on 154.16 the past few weeks. Initially there were quick counts, but this past weekend I heard an unit calling Racine fireground 2 to dispatch with no reply. These transmissions are from a repeater using a DPL of 506 (same as Racine fireground 1 on 151.415). The repeater has the same "chirps" as all other Racine City fire repeaters. Good signal from mid-Milwaukee Co.