Question: In Over-The-Air (OTA) antenna performance testing for User Equipment (UE), what is a common source of uncertainty when measuring received signal levels using a Measurement Receiver?
Option 1: Multipath Interference in the Test Environment
Option 2: Limited Dynamic Range of the Measurement Device
Option 3: Variability in UE Transmission Power
Option 4: Combined Effects of Limited Absolute Level Accuracy and Non-Linearity
Explanation: The correct answer highlights the technical challenge from both limited absolute level accuracy (how accurately the device measures signal levels) and non-linearity (how consistently it measures across different signal strengths), directly impacting received signal level measurement reliability in OTA tests.