If BNRG-2 is in UART DTM mode, can you run RF Receiver test independent of the host processor FW? BNRG-2 is directly connected to BlueNRG GUI via UART

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In other words.. Can the BNRG-2 (DUT) be tested in DTM_UART mode, as a standalone entity ? Assuming BNRG-2 UART lines are accessible for interfacing with BlueNRG GUI.

To add further.. I have tested and found that RF Transmitter test works as expected : number of packets transmitted by DUT were received by a Dev kit - STEVAL-IDB008V2 (configured as Receiver in RF Test); which also has UART_DTM firmware programmed. Both the DUT and Dev kit were controlled by 2 separate BlueNRG GUI's as suggested in 'Packet Exchange test' of https://www.st.com/resource/en/application_note/dm00262995-bringing-up-the-bluenrg1-bluenrg2-devices-stmicroelectronics.pdf

When my DUT is in Rx mode of RF tests, and Dev kit is in Tx mode, I don't receive any packets. Trying to figure out why.. Any suggestions would be appreciated. Thanks!