Question: In conducted performance characteristic tests for a Satellite Access Node (SAN) with receiver antenna diversity, how is the required Signal-to-Noise Ratio (SNR) applied?
Option 1: The required SNR is applied cumulatively across all antenna ports.
Option 2: The required SNR is only applied to the primary antenna port.
Option 3: The application of SNR varies based on the test environment and multipath channel class.
Option 4: The required SNR shall be applied separately at each antenna port.
Explanation: In a SAN with receiver antenna diversity, to ensure optimal performance and accurate testing, the required Signal-to-Noise Ratio (SNR) must be met individually at each reception point. This approach guarantees that each antenna port, which may experience different signal conditions, meets the minimum SNR requirements for reliable communication. Applying SNR separately at each antenna port is crucial for assessing the true diversity gain and overall system performance in diverse environmental conditions.