Keysight Technologies E4417A Service Manual page 159

Therefore to attain a power of 100 mW as shown in the
applying 14.4493 Volts, the actual amount of voltage required from the Universal
Source would be:
14.4493 × 1.075533 = 15.6 Volts
By using the DMM Uncertainties calculated previously the worst case voltage and
corresponding power errors can be calculated.
Power Setting (mW)
0.001
0.01
0.1
1
10
100
Keysight E4416A/E4417A Power Meters Service Guide
Measuremet Uncertainty Analysis - Instrument Accuracy Test
Applied Vol ts
0.14493 mV
1.4493 mV
14.493 mV
144.93 mV
1.4588 V
15.6 V
DMM Error on Range
Standard Uncertainty
μ
( V)
μ
<1.371 V
μ
<1.371 V
μ
1.371 V
μ
6.09 V
μ
56.8 V
μ
148.8 V
Table D-2, instead of
Worst Case Vol tage
Error on Range (%)
0.946%
0.0946%
0.00946%
0.00420%
0.00389%
0.00095%
D
Worst Case Power
Error on Range
μ
0.00946 W
μ
0.00946 W
μ
0.00946 W
μ
0.042 W
μ
0.389 W
μ
0.95 W
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