controller_hci_uart RF characterstics

[espola]

Hello,
when testing the Bluetooth RF characteristics using the controller_hci_uart
application and the device under test mode, the results vary between different
test iterations and also test cases fail.
To initiate device under test mode we run the following HCI command sequence:

HCI_Reset
HCI_Set_Event_Filter 0x00
HCI_Set_Event_Filter 0x01, 0x00
HCI_Set_Event_Filter 0x02, 0x00, 0x02
HCI_Write_Scan_Enable 0x03
HCI_Write_Voice_Setting 0x0060
HCI_Write_Authentication_Enable 0x00
HCI_Write_Page_Timeout 0x2000
HCI_Enable_Device_Under_Test_Mode

Is additional configuration of demo application needed?
Is RF calibration missing?
Are additional HCI commands or vendor specific HCI commands required?

For the test \esp-idf\examples\bluetooth\controller_hci_uart from esp-idf v2.1 is used

Best regards,
Ola