Question: What is a prerequisite for transmitter characteristics tests involving HS-DPCCH in HSDPA?
Option 1: Continuous transmission and test loop operation on UL DPCH
Option 2: Intermittent transmission with standard loopback on DL DPCH
Option 3: Discontinuous transmission with enhanced loopback on UL DPCCH
Option 4: Synchronous transmission with reduced loopback on HS-SCCH
Explanation: This is correct because, for accurate testing of transmitter characteristics involving High-Speed Dedicated Physical Control Channel (HS-DPCCH) in High-Speed Downlink Packet Access (HSDPA) scenarios, continuous signal flow is necessary to assess performance under sustained conditions. Additionally, test loop operation on the Uplink Dedicated Physical Channel (UL DPCH) is required to facilitate the measurement of transmitter characteristics in a controlled, closed-loop environment, ensuring reliable and repeatable test results.