Sct controller reported of targets jumping in a certain area on his radar scope. Facility is aware o...

Narrative:

Aircraft X was maneuvering in the cma valley practice area. I issued traffic and a 30 degree turn to the left to aircraft X. At the conclusion of my transmission the target jumped to the right and tracked in the opposite direction. I asked the pilot his heading; and then the target jumped back to where it was initially.our facility has had this issue since installing stars in fim VOR area. This issues occurs even at higher altitudes as well. Many of the traffic/air carriers transitioning over the fim VOR have the same issues. The facility is aware of our equipment issues; but my concern is twofold; the new equipment is in and will not be fixed; and I will through no fault of my actions will vector an aircraft into another aircraft resulting in a mid-air collision and loss of life.fix our equipment or fall back to common ARTS.

Original NASA ASRS Text

Title: SCT Controller reported of targets jumping in a certain area on his radar scope. Facility is aware of the problem. Controller wants the problem fixed.

Narrative: Aircraft X was maneuvering in the CMA valley practice area. I issued traffic and a 30 degree turn to the left to Aircraft X. At the conclusion of my transmission the target jumped to the right and tracked in the opposite direction. I asked the pilot his heading; and then the target jumped back to where it was initially.Our facility has had this issue since installing STARs in FIM VOR area. This issues occurs even at higher altitudes as well. Many of the traffic/air carriers transitioning over the FIM VOR have the same issues. The facility is aware of our equipment issues; but my concern is twofold; the new equipment is in and will not be fixed; and I will through no fault of my actions will vector an aircraft into another aircraft resulting in a mid-air collision and loss of life.Fix our equipment or fall back to common ARTS.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1340420
Time
Date	201603
Local Time Of Day	1201-1800
Place
Locale Reference	SCT.TRACON
State Reference	CA
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	VFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 21
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Sct controller reported of targets jumping in a certain area on his radar scope. Facility is aware of the problem. Controller wants the problem fixed.