Question: In conformance testing for UE/MS OTA antenna performance, how is drift in Total Radiated Sensitivity (TRS) typically monitored due to statistical uncertainty of Bit Error Rate (BER) measurement?
Option 1: By applying a fixed correction factor to all TRS measurements
Option 2: Through visual inspection of the antenna's physical condition before each test
Option 3: By comparing TRS readings against a simultaneously measured reference antenna
Option 4: Either by using an uncertainty value (e.g., 0.2dB) or by measuring TRS drift with a setup matching the actual TRS measurement
Explanation: This is correct because, unlike Total Radiated Power (TRP), statistical uncertainty in BER measurements complicates direct monitoring of TRS drift. Thus, testers can either account for this uncertainty using a predefined value (like 0.2dB) or conduct a separate measurement specifically designed to quantify the drift in TRS under conditions identical to the actual test setup, ensuring accuracy in conformance testing.