Sampling oscilloscopes are often used to measure jitter in gigahertz-rate optical signals. With bit rates that high, errors in an oscilloscope's time base can add jitter to a viewed signal. Engineers at NIST (National Institute of Standards and Technology) have developed a calibration technique that reduces oscilloscope time-base jitter (Ref. 1). Experiments show that the technique reduced time-base jitter from 0.81 ps to 0.22 ps, a factor of nearly 4.
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