Question: What is the recommended approach for determining the uncertainty due to chamber statistics in Over The Air (OTA) antenna performance conformance testing for User Equipment (UE)/Mobile Station (MS)?
Option 1: Through repeated calibration measurements, assuming a normal distribution of the uncertainty contribution value.
Option 2: By theoretical calculations based on reverberation chamber dimensions and frequency range.
Option 3: Using a fixed percentage of the measured antenna gain as an uncertainty margin.
Option 4: Via comparison with anechoic chamber measurements for baseline uncertainty establishment.
Explanation: The correct approach, as aligned with best practices in telecom testing (e.g., industry guidelines), involves empirical methods to account for environmental variability. Repeated calibration measurements help quantify this variability accurately, and assuming a normal distribution allows for statistical analysis of the uncertainty contribution. This method comprehensively addresses factors like limited chamber modes and mode-stirring techniques, providing a reliable basis for conformance testing.