Question: For a UE (User Equipment) supporting HSDPA (High-Speed Downlink Packet Access) with 64QAM (Quadrature Amplitude Modulation), what is the primary criterion for defining the Maximum Input Level for HS-PDSCH (High-Speed Physical Downlink Shared Channel) reception in TDD (Time Division Duplex) mode?
Option 1: The maximum power received at the UE antenna port without degrading specified HSDPA throughput performance.
Option 2: The minimum signal-to-noise ratio required for reliable data transmission.
Option 3: The highest data rate achievable under optimal network conditions.
Option 4: The lowest possible latency for packet delivery.
Explanation: This option is correct because the Maximum Input Level for HS-PDSCH reception is specifically defined in relation to maintaining the specified HSDPA throughput performance. This means the primary concern is ensuring that the received power at the UE's antenna does not compromise the expected high-speed data throughput, which is a key aspect of HSDPA's functionality in TDD mode.