Measurement Uncertainty Analysis - Instrument Accuracy Test D
E4416A/E4417A Power Meters Service Guide D-159
Combined Standard Uncertainty uc(y):
There is no correlation associated with this measurement
Hence:
Table D- 3 shows the combined standard uncertainty at all the power levels
from 3 μW (
−25 dBm) to 100 mW (20 dBm).
uc
2
y() C
TSE
uTSE()⋅[]
2
∑
C
MV
uMV()⋅[]
2
,=
Ta bl e D - 3 Combined Standard Uncertainty
Power U(TSE) U(MV) (Converted) uc(y) k uc(y)
k = 2
3.16
μW 0.0097 μW 0.00946 μW 0.0135 μW 0.0271 μW
10
μW0.009 μW 0.00946 μW 0.0131 μW 0.0262 μW
31.6
μW 0.0095 μW 0.00946 μW 0.0134 μW 0.0268 μW
100
μW0.035 μW 0.00946 μW 0.0363 μW 0.0725 μW
316
μW0.03 μW 0.042 μW 0.0516 μW 0.1032 μW
1 mW 0.00007 mW 0.000042 mW 0.000082 mW 0.00016 mW
3.16 mW 0.00022 mW 0.000389 mW 0.000447 mW 0.00089 mW
10 mW 0.00069 mW 0.000389 mW 0.000792 mW 0.00158 mW
31.6 mW 0.0022 mW 0.00095 mW 0.00239 mW 0.00479 mW
100 mW 0.0092 mW 0.00095 mW 0.00924 mW 0.01850 mW
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