Question: In 3GPP-compliant terminal testing for Radio transmission and reception (FDD), what triggers the conclusion of a test, as per the specified test method?
Option 1: Completion of all test frequencies
Option 2: Expiration of a predetermined number of bit errors
Option 3: Achievement of a specific Signal-to-Noise Ratio (SNR)
Option 4: Reaching either the minimum test time, an early pass event, or an early fail event
Explanation: This option correctly identifies the stop criterion for tests as outlined in the 3GPP TS specifications. The test concludes when it meets one of three conditions: - **Minimum Test Time**: Ensuring a baseline duration is met. - **Early Pass Event**: The test achieves criteria that guarantee a pass before the full time, optimizing testing efficiency. - **Early Fail Event**: Conversely, if the test fails to meet certain thresholds, it can be stopped early to save resources. This approach streamlines the testing process, making it more efficient for terminal conformance assessment in wireless communications.