Question: For a UTRA-UE (Universal Terrestrial Radio Access - User Equipment), what is the primary reference for measuring out-of-channel emission in the context of the spectrum emission mask?
Option 1: RRC (Radio Resource Control) filtered mean power of the UE carrier
Option 2: Maximum transmit power capability of the UE
Option 3: Adjacent channel's received signal strength
Option 4: Thermal noise floor of the receiver
Explanation: The correct answer is Option 1 because, according to specifications for UTRA-UE, out-of-channel emissions are measured relative to the RRC filtered mean power of the UE carrier, ensuring a standardized reference point for assessing emission compliance and maintaining spectral integrity.