Time Scale Calibrations for Time-Domain Measurements

The time resolution of sampling oscilloscope. Time Domain Reflectometer (TDR), and Time Domain Transmission (TDT) measurements is approaching the low picoseconds. Time scale calibration and linearity verification with picosecond accuracy has become a crucial concem. Several methods for calibrating the time scale and for veriij?ing the sweep linearity of the PSP-1000, which has an intemal rise time of 5 picoseconds, will be described.