Question: In an Active Antenna System (AAS) Base Station (BS), what does the symbol "ΔfOOB" represent in relation to the uplink operating band?
Option 1: The minimum channel bandwidth for reliable communication
Option 2: The frequency range for discovering narrowband responses in receivers
Option 3: The maximum allowed power leakage into adjacent bands
Option 4: The maximum offset of the out-of-band boundary from the uplink operating band edge
Explanation: Understanding the symbol "ΔfOOB" is crucial for ensuring Electromagnetic Compatibility (EMC) in AAS Base Stations. This symbol specifically denotes the maximum permissible deviation (offset) of the out-of-band emissions boundary from the defined edge of the uplink operating frequency band. This measurement is vital for preventing interference with other wireless services operating on adjacent frequencies, thus maintaining the integrity and performance of the telecom network.