Question: In a TDD (Time Division Duplex) scenario, when testing the conformance of a User Equipment (UE) for HSDPA (High-Speed Downlink Packet Access) data transmission, what is the primary purpose of continuously sending `TPC_cmd = +1` power control bits to both DPCH and HS-SICH?
Option 1: To reduce the overall power consumption of the UE during HSDPA transmission.
Option 2: To increase the data transmission rate by maximizing the power of both control and data channels.
Option 3: To test the UE's ability to handle simultaneous power adjustments for multiple channels in a TDD frame structure.
Option 4: To measure the UE's mean power output accurately, ensuring it falls within specified limits under controlled conditions.
Explanation: The procedure involves setting specific power levels and adjusting them using `TPC_cmd = +1` to measure the UE's mean power output under controlled conditions, allowing for accurate assessment of the UE's power output in response to power control commands, verifying it operates within specified power limits.