It is recommended to test the assembled product at the RF level, ensuring all discrete
components are correctly fitted and the RF paths (independent 2.4 GHz and 5 GHz) from the chip
pins to the antenna are verified.
Test method
Since the TX and RX paths are common from the chip pin to the antenna, it is sufficient to only test in the TX direction.
Alternative method
The received signal power can be checked while performing crystal/crystal oscillator trimming. However, this is typically only conducted on a single band, so an additional check of the other band is recommended.