Question: In a reverberation chamber method for testing UE OTA antenna performance (as per 3GPP standards), what is the primary goal when adjusting the base station output power during BER measurement?
Option 1: To achieve a Signal-to-Noise Ratio (SNR) of at least 10dB to ensure reliable communication.
Option 2: To find the lowest output power that yields a Bit Error Rate (BER) value of 0.2% using 40,000 or more bits.
Option 3: To maintain a constant Downlink (DL) power step size of exactly 1dB throughout the measurement process.
Option 4: To maximize the UE's transmission power to simulate heavy network load conditions.
Explanation: The correct answer, Option 2, reflects the procedure's objective as outlined in the test steps. Specifically, step 5 aims to adjust the base station output power to find the minimum level that achieves a BER of 0.2% with a substantial number of bits (40,000 or more), ensuring a reliable measurement of the UE's sensitivity under controlled fading conditions (Rayleigh fading in this context). This process is crucial for accurately assessing the UE's antenna performance in a simulated real-world environment.