Question: In calculating Total Radiated Sensitivity (TRS) for a User Equipment (UE)/Mobile Station (MS), what is the primary basis for determining the effective isotropic sensitivity (EIS) in an anechoic environment with controlled conditions?
Option 1: Average of the highest power levels received across all sampling intervals for both theta and phi angles.
Option 2: Lowest power received by the UE/MS for a discrete number of field combinations, averaged across different polarization settings.
Option 3: Power available at the antenna output such that the sensitivity threshold is achieved for each orthogonal polarization (θ, φ) at a specific frequency.
Option 4: Maximum power transfer function calibrated from cable losses and reflection coefficients for measurement antennas.
Explanation: The correct answer, Option 3, directly aligns with the definition of effective isotropic sensitivity (EIS) as described in the context of Total Radiated Sensitivity (TRS) calculations. EIS is specifically defined as the power available at the antenna output where the sensitivity threshold is met for each polarization, emphasizing the importance of achieving this threshold across all polarizations (θ, φ) at a given frequency. This nuanced understanding highlights the critical role of polarization in determining TRS, reflecting a deeper comprehension of telecom concepts related to antenna performance and sensitivity thresholds.