Question: What is the primary objective of evaluating the blocking characteristics in a UTRA (Universal Terrestrial Radio Access) User Equipment (UE) receiver?
Option 1: To assess the receiver's ability to filter out adjacent channel interference while maintaining performance within specified limits.
Option 2: To measure the transmitter's power output in the presence of multiple frequency signals.
Option 3: To determine the UE's sensitivity to spurious responses across all frequency bands.
Option 4: To evaluate the receiver's ability to handle simultaneous multiple wanted signals.
Explanation: The blocking characteristics test aims to ensure that a UTRA UE can receive its assigned channel frequency signal without significant performance degradation due to unwanted interferers on other frequencies (excluding spurious responses and adjacent channels). This directly relates to the receiver's ability to filter out non-adjacent channel interference, making Option 1 the correct answer.