Question: In 3GPP conformance testing for User Equipment (UE), what is the primary purpose of defining default message contents for RF tests, such as those specified for UL/DL reference measurement channels and UE test loop modes?
Option 1: To ensure interoperability between different UE manufacturers and network operators.
Option 2: To simplify the testing process by providing standardized message templates.
Option 3: To enhance the security of communication by using predefined, secure message contents.
Option 4: To establish a baseline for comparing the performance of UEs under various RF test scenarios.
Explanation: The correct answer highlights the key reason for defining default message contents in RF tests: to create a standardized basis (baseline) for evaluating and comparing the RF performance of different User Equipment (UEs) across various test scenarios, ensuring consistency and reliability in conformance testing.