Agilent Technologies E4417A - Page 174

Measurement Uncertainty Analysis - Instrument Accuracy Test D
E4416A/E4417A Power Meters Service Guide D-153
Standard Uncertainty u(xi):
Table D- 1 shows the standard deviation of the 30 readings from the DUT at
various power levels.
The distributions are all normal.
Ta bl e D - 1 Standard Uncertainty Results
Power Level Standard Deviation of 30 Readings Conversion to Linear Units
Standard Uncertainty
u(X(−25)) 3.162 μW 0.0132 dB 0.0097 μW
u(
X(−20)) 10 μW 0.0038 dB 0.009 μW
u(
X(−15)) 31.62 μW 0.0013 dB 0.0095 μW
u(X(−10)) 100 μW 0.0015 dB 0.035 μW
u(X(−5)) 316.2 μW 0.0004 dB 0.03 μW
u(X(0)) 1 mW 0.0003 dB 0.00007 mW
u(X(5)) 3.16227 mW 0.0003 dB 0.00022 mW
u(X(10)) 10 mW 0.0003 dB 0.000690 mW
u(X(15) 31.62277 mW 0.0003 dB 0.0022 mW
u(X(20)) 100 mW 0.0004 dB 0.0092 mW
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