Twenty four years ago Wiltron (now Anritsu) published a Technical Review "Why Tolerate Unnecessary Measurement Errors", long since out of print. Thousands were printed and it was widely used by test engineers. At that time the principal network analyzer used by industry was the scalar analyzer. Today while scalars are still used, the Vector Network Analyzer (VNA)has also become common in both engineering and manufacturing environments. Many measurements are made and recorded with little attention given to the actual accuracy of the measurement.
This Review will include some of the material originally presented in 1975 as it still very important and addresses problems that regularly appear in current applications.
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