True Differential and Calibrated TDR for Maximum Impedance Measurement Accuracy  Compact, Battery-Powered Design for true portability  30 ps Typical Rise Time, S-Parameter support up to 15 GHz (15D and 15D-XR models)  260 ps Typical Rise Time, S-Parameter support up to 1.25 GHz (01D model)  50,000-point memory supporting DUT lengths up to 30 m (15D), 50 m (15D-XR) and 1 km (01D)  Automatic Ohmic Loss Compensation for enhanced accuracy  Built-in Skew Analysis (Inter-Pair and Intra-Pair) for differential signal integrity  XR Series: Engineered for Speed, Optimized for Continuous Cable Production