C Measurement Uncertainty Analysis - Power Reference Level Test
156 Keysight E4416A/E4417A Power Meters Service Guide
Therefore,
Repeatability
To verify the overall repeatability of the measurement, the test was repeated 20
times, using the same DUT. For each test cycle, the Power Reference Level Test
and the Power Reference Level Adjust tests, were carried out; at no point during
these tests was the 1mW on the DUT adjusted. The thermistor was disconnected
and reconnected between each test with the sensor position rotated each time.
The results for this evaluation are shown in Table C-1.
UR()
200 10 5 3++()×
1000000
---------------------- -------------
1000 0.5 0.5+()×
1000000
------------------------ -----------+=
Table C-1 Measurement Repeatability Results
Measurement ADJUST REF. REF. LEVEL TEST
1 0.999548951 0.999499495
2 0.999541333 0.999554257
3 0.999449078 0.999414037
4 0.999546994 0.999509401
5
[a]
0.999138526 0.9991726
6 0.999647055 0.999454911
7 0.999539391 0.999515949
8 0.999567191 0.999558795
9 0.999600963 0.999554633
10 0.999405584 0.999377721
11 0.999523392 0.999566084
12 0.999504386 0.999504323
13 0.999443652 0.999463611
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