Question: In a multi-band capable Base Station (BS) conformance testing using TDD, what is required for the antenna connector NOT being tested during a single-band or multi-band test with separate antenna connectors?
Option 1: It must be connected to a secondary testing equipment
Option 2: It should be left open without any termination
Option 3: It shall be terminated
Option 4: It needs to mimic the impedance of another band
Explanation: In the context of ensuring accurate and reliable test results for a multi-band capable Base Station, especially when testing involves separate antenna connectors for different bands, terminating the unused antenna connector is crucial. This termination prevents potential signal reflections or interference that could skew the test outcomes for the band under test. Thus, proper termination of non-active ports is a standard practice in RF and microwave engineering to maintain signal integrity during testing.