Question: In the context of E-UTRA Base Station (BS) Electromagnetic Compatibility (EMC), which of the following statements is TRUE regarding the Conducted Emissions test for AC mains power input/output ports?
Option 1: This test is mandatory for all AC output ports, regardless of their connection to the EUT's AC power port.
Option 2: The test is applicable only to equipment powered by the AC mains and excludes direct-connected AC output ports to the EUT's AC power port.
Option 3: Conducted Emissions testing for AC mains is not required for radio equipment with associated ancillary equipment.
Option 4: All configurations of radio and ancillary equipment are subject to this test, without the need for a representative configuration.
Explanation: This is correct because the test's applicability is specifically stated to be for equipment powered by AC mains, with an exemption for AC output ports directly connected (or via a circuit breaker) to the EUT's AC power port. This ensures that only relevant configurations are tested for conducted emissions, focusing on the equipment's ability to limit internal noise from AC mains power input/output ports.