Hi,
Two test methods are available:
1. Remove all antennas (for example, two 2.4 GHz antennas and two 5 GHz antennas) and insert signal overflow shielding plugs on other RF ports to test whether each antenna can properly transmit signals.
2. In the MIMO scenario, you can test the negotiated rates of dual-antenna (2.4 GHz or 5 GHz), 2x2, and 3x3 STAs. The negotiated rates are multiples.
Glad to help you! Any further questions, let us know.