Question: In UTRAN Iur interface RNSAP signalling, what does the DL Power IE indicate when Transmit Diversity is applied to a downlink physical channel in FDD mode?
Option 1: The absolute power of the transmitted DPDCH symbols on each branch.
Option 2: The power offset between the linear sum of the power for this downlink physical channel on all branches and the primary CPICH power.
Option 3: The Reference F-DPCH TX Power without considering branch variations.
Option 4: The total power reduction due to Transmit Diversity across all branches.
Explanation: When Transmit Diversity is applied in FDD mode, the DL Power IE doesn't indicate absolute powers or reference powers without context. Instead, it specifically points to the relative power difference (offset) between the combined power of the physical channel across all branches and the primary CPICH power, ensuring proper power management and signaling in diverse transmission scenarios.