Increasing the accuracy of your measurements
The following information tells you how to obtain the highest accuracy
available from the oscilloscope. Though the examples refer to the HP
54720, most of the principles apply to any oscilloscope.
The discussion is divided into four sections. The first section
describes various methods for making time-interval measurements
and the pros and cons of each. The second section introduces the
concept of statistical analysis of time intervals. The third section
explores errors in time-interval measurements that are not related to
the time base accuracy, including the response of the oscilloscope’s
vertical channels and the effect of probes. The fourth section
discusses various sampling techniques used in digitizing oscilloscopes
and the effects of bandwidth and sampling rate on accuracy.
13–21
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