Net research NetProbe 2000 User Manual page 125

When the PDL measurement begins, the tester will first reset the displayed results and then calibrate. After a couple
seconds, the Current Delay, Minimum Delay and Maximum Delay values will display along with a histogram.
The Current Delay, Minimum Delay and Maximum Delay is measured and reported in milli-seconds (ms) and unit
intervals (ui's). Press the button to reset the Min Delay and Max Delay values.
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