Question: In E-UTRA Base Station conformance testing, what is the primary condition for achieving the Reference Sensitivity Power Level (PREFSENS) during a throughput requirement test?
Option 1: The test must be conducted with a specified level of interfering signal power applied to the BS antenna connector.
Option 2: The measurement setup requires the presence of an active duplex branch on both uplink and downlink simultaneously.
Option 3: No interfering signal power is applied to the BS antenna connector during the test, as per the defined measurement configuration.
Option 4: The reference point for signal power must be set at the output of the transmitter (antenna connector).
Explanation: According to E-UTRA Base Station conformance testing standards, the Reference Sensitivity Power Level (PREFSENS) test assesses the minimum mean power required at the antenna connector to meet a throughput requirement without external interference. Thus, the correct setup involves not applying any interfering signal power to the BS antenna connector, ensuring an isolated measurement of the base station's sensitivity under ideal conditions.