Question: For a UTRA FDD (Universal Terrestrial Radio Access Frequency Division Duplex) User Equipment (UE), where is the reference point located for measuring the SFN-SFN (System Frame Number) observed time difference type 1?
Option 1: At the UE's baseband processor
Option 2: At the interface between the UE and the serving cell tower
Option 3: At the midpoint of the antenna cable
Option 4: At the antenna connector of the UE
Explanation: The correct answer is Option 4 because, according to the specifications for measuring SFN-SFN observed time difference type 1 in UTRA FDD UEs, the reference point is defined as the antenna connector of the User Equipment (UE). This precise location ensures consistency and accuracy in measurements across different devices and scenarios, reflecting real-world application considerations for telecom network synchronization and performance evaluation.