Question: For a UTRA FDD UE supporting HSDPA and E-DCH, what is the frequency range relative to the UE centre carrier frequency to which the spectrum emission mask applies?
Option 1: Up to 1 MHz away from the UE centre carrier frequency
Option 2: Between 5 MHz and 20 MHz away from the UE centre carrier frequency
Option 3: Between 2.5 MHz and 12.5 MHz away from the UE centre carrier frequency
Option 4: From 25 MHz to 50 MHz away from the UE centre carrier frequency
Explanation: The spectrum emission mask for a UTRA FDD UE, especially one supporting HSDPA and E-DCH, ensures minimal interference to adjacent channels. The specified range of 2.5 MHz to 12.5 MHz away from the centre carrier frequency is a critical boundary for measuring out-of-channel emissions relative to the UE's carrier power, maintaining spectral efficiency and compliance with regulatory requirements.