Question: For Fast Transients Common Mode testing in E-UTRA, under what condition is the test also required for signal, control, and DC power input/output ports, in addition to AC mains power input ports?
Option 1: When the device is operating in a high-temperature environment.
Option 2: If the manufacturer intends to use cables of any length with these ports.
Option 3: Only if the equipment is part of a combination of UE and ancillary equipment.
Option 4: If the cables for these ports may be longer than 3 meters.
Explanation: This question assesses understanding of specific testing conditions for electromagnetic compatibility in E-UTRA devices. The correct answer reflects a nuanced detail from telecom standards, highlighting the importance of cable length (over 3 meters) in determining the scope of Fast Transients Common Mode testing for compliance and real-world application.