The NFA uses internal IF attenuator values for measuring gain. The test is comprised of an internal IF attenuator calibration. Using an external 50 MHz CW signal at –46 dBm, the attenuator values are computed as error ratios.
The analyzer only uses a range of 40 dB for any given measurement from –20 dB to > +40 dB within the available 0 to 70 dB IF attenuator range. Therefore, the actual instrumentation uncertainty is calculated as the maximum peak to peak error over any 40 dB range within the available 0 to 70 dB IF attenuator range. The thirty available ranges are all tested for the maximum and minimum peak-to-peak values within their respective 40 dB window. The thirty peak-to-peak values are then compared, and the worst case error is reported as the instrumentation uncertainty error.
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Test Equipment |
Recommended Models |
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Signal Generator |
PSG models |