Question: When a Base Station (BS) is intended to operate co-located with other base stations of different systems (e.g., GSM, UTRA FDD, E-UTRA), what additional testing requirements must be met according to the manufacturer's declaration?
Option 1: Only compliance with spurious emissions test requirements and receiver blocking test requirements for all co-located systems.
Option 2: Compliance with transmitter power test requirements for each system, as well as spurious emissions testing for the host system only.
Option 3: Receiver sensitivity testing for all co-located systems and transmitter intermodulation testing for the host system.
Option 4: No additional testing is required; standard BS conformance tests suffice for all co-location scenarios.
Explanation: When a Base Station is intended to operate in close proximity (co-located) with base stations of other systems, it must ensure its operations do not interfere with, and are not unduly affected by, the neighboring systems. Thus, testing for spurious emissions (to prevent interference from the BS under test) and receiver blocking (to assess the BS's ability to withstand interference from others) for all co-located systems is crucial, ensuring both the BS's compliance and the integrity of the shared operational environment.