Question: In a TDD (Time Division Duplex) system, as per 3GPP specifications, what is the defined reference point for measuring Cell Synchronisation Burst Timing in a Node B (Base Station)?
Option 1: The air interface between User Equipment (UE) and Node B
Option 2: The Rx antenna connector of the Node B
Option 3: The Tx/Rx switch within the Node B's radio unit
Option 4: The Node B's system clock input
Explanation: Accurate measurement of Cell Synchronisation Burst Timing is crucial for synchronizing with neighboring cells in a TDD system. To ensure precision, the reference point for such measurements should be as close to the antenna as possible, minimizing the inclusion of variable internal delays. Thus, the Rx (Receive) antenna connector, being the entry point for all received signals, serves as the standard reference point for this measurement, ensuring consistency across different Node B implementations.