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Chapter 2
Test Descriptions
Gain Measurement Uncertainty
Gain Measurement Uncertainty
NOTE
You must perform the Noise Figure Range and Accuracy performance
test (see page 55) before this test.
Test Description
The NFA uses internal IF attenuator values for measuring gain. The test
comprises of an internal IF attenuator calibration. Using an external
50 MHz CW signal at -46dBm the attenuator values are computed as
error ratios.
The analyzer only uses a range of 40dB for any given measurement from
-20dB to >+40dB within the available 0 - 70dB IF attenuator range.
Therefore, the actual Instrumentation Uncertainty is calculated as the
maximum peak to peak error over any 40dB range within the available
0 - 70dB IF attenuator range. The 30 available ranges are all tested for
the maximum and minimum Peak to Peak values within their respective
40dB range. The 30 peak to peak values are then compared and the
worst case error is reported as the Instrumentation Uncertainty error.
The graph below shows a typical plot of the data. 1 of the 30 available
ranges is shown giving the typical Instrumentation Uncertainty for the
specific range between 30 to 70dB.
Summary of Contents for N8972A
Page 9: ...ix Declaration of Conformity N8972A ...
Page 10: ...x Declaration of Conformity N8973A ...
Page 11: ...xi Declaration of Conformity N8974A ...
Page 12: ...xii Declaration of Conformity N8975A ...
Page 19: ...Contents xix ...
Page 20: ...xx Contents ...
Page 108: ...88 Chapter2 Test Descriptions Measurement Jitter ...
Page 124: ...104 Chapter3 Technical Specifications General Specifications ...
Page 136: ...116 AppendixA Model N8972A Test Records Measurement Jitter Test Record ...
Page 148: ...128 AppendixB Model N8973A Test Records Measurement Jitter Test Record ...
Page 160: ...140 AppendixC Model N8974A Test Records Measurement Jitter Test Record ...
Page 174: ...154 AppendixD Model N8975A Test Records Measurement Jitter Test Record ...