T-921 2kW, 24 NM, 18" Radome T-941 4kW, 36NM, 25" Radome T-940 4kW, 48NM, 3 1/2' or 4 1/2' Open Array. SI-TEX's T-900 Series Radars feature new Hyper-Digital Processing? (HDP) to provides real-time rotation with enhanced target discrimination. It virtually eliminates unwanted noise to provide a clearer detailed image of targets and enhances the detection of smaller targets.