7Tutorial
298 Keysight 34970A/34972A User’s Guide
Example: Calculating Measurement Error
Calculate the approximate measurement error for a pulse train input with a crest
factor of 3 and a fundamental frequency of 20 kHz. The internal DMM is set to the
1 V range. For this example, use the 90-day accuracy specifications of ± (0.05% of
reading + 0.04% of range), as shown in Chapter 8.
Error
sine
= ±(0.05% + 0.04%) = ±0.09%
Error
crest factor
= 0.15%
Error
bandwidth
= * 100 = 1.4%
Total Error = 0.09% + 0.15% + 1.4% = 1.6%
3–
2
20000×
4 3.14159 1000000××
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