Question: What is the primary cause of Out of Band (OOB) emissions in a Base Station (BS) transmitter, as per 3GPP specifications?
Option 1: Imperfections in the receiver's filtering mechanism
Option 2: Non-linearity in the transmitter and the modulation process
Option 3: Insufficient antenna isolation leading to external interference
Option 4: Inadequate power amplification during signal transmission
Explanation: Out of Band emissions are primarily caused by the inherent non-linearity of the transmitter's components and the process of modulation itself, which distorts the signal and generates unwanted emissions outside the intended channel bandwidth. This understanding is crucial in telecom networks for ensuring compliance with spectral regulations and minimizing interference between adjacent channels. (BS: Base Station; OOB: Out of Band)