Cessna 210 Centurion / Turbo Centurion 210C; 210D
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 5
Confusion; Distraction; Human-Machine Interface
ATC Issue All Types
Air Traffic Control Provided Assistance
ATC Equipment / Nav Facility / Buildings
Aircraft X was level at 090 and Aircraft Y was climbing from 050 to 070; both in the same area. The Conflict Alert went off and I saw traffic in front of Aircraft X indicating 090 and 20 KTS faster displaying a unique transponder code. I issued traffic to Aircraft X who did not have the traffic in sight. The traffic seemed to disappear and reappear in different relative positions to Aircraft X (12 o'clock; 3 o'clock; 9 o'clock) and the transponder codes were different each time. The codes being displayed were different from any other aircraft I was working including pending aircraft in my strip bay. Eventually the traffic disappeared and did not return. I was using FUSION during the entire event.I think this is an issue with our surveillance system; but I don't know which component (STARS; ASR; etc.).
DAB Controller reports of erroneous targets appearing in front of traffic being worked with different transponder codes at each hit of the radar.