Question: What are the minimum mode(s) that test equipment must support for conformance testing of a User Equipment (UE), as per 3GPP specifications?
Option 1: Only FDD (Frequency Division Duplexing) Mode
Option 2: Only TDD (Time Division Duplexing) Mode
Option 3: Either FDD Mode or TDD Mode, but not necessarily both
Option 4: Both FDD and TDD Modes
Explanation: To ensure comprehensive conformance testing of UEs that may operate in various environments, test equipment must be capable of supporting both Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD) modes. This flexibility allows for the testing of UEs designed for different network architectures, ensuring they meet 3GPP standards regardless of whether they are deployed in FDD, TDD, or dual-mode networks. Supporting both modes is crucial for evaluating a UE's ability to register, set up RRC connections, and maintain appropriate radio bearers in diverse operational scenarios.