As part of the FCC/CE type approval measurements, every BT radio needs to be set in a constant transmit mode with modulation. How is this done with the BLUENRG-MSQTR?

[Moi]

Hi,

We are having issues putting the BLUENRG-MSQTR on our board into the hci transmit test mode. 

We call the following two methods and they both return success but looking on a spectrum analyser, I don't see anything transmitted. 

ret = aci_hal_set_tx_power_level(1,7);

ret = hci_le_transmitter_test(27,30,0);

Calling other methods such as aci_hal_tone_start I can see the module transmitting however we require the hci_le_transmitter_test for compliance testing.

Testing on a X-NUCLEO-IDB05A1 development board we can get the hci_le_transmitter_test method to work and comparing the SPI communication of the BLUENRG-MSQTR vs  X-NUCLEO-IDB05A1 they look almost identical. 

We are wondering if anyone has any ideas how to get the BLUENRG-MSQTR to transmit in the LE test mode.

[Sebastien DENOUAL]

Hi Moi,

Indeed, you are right. SPBTLE-RF available n X-NUCLEO-IDB05A1 is a BLE module which embeds BlueNRG-MS. So there is no difference on SPI transaction between BlueNRG-MS and SPBTLE-RF as it is same chipset.

As you mentioned there is few APIs available to help test and certification process :

ST BLE stack is supporting few APIs customer should use in order to set the product in required mode:

>>> HCI_LE_RECEIVER_TEST : allow to set the product in Rx continuous mode at dedicated frequency.

>>> HCI_LE_TRANSMITTER_TEST : allow to set the product in Tx modulated mode at dedicated frequency. 

>>> HCI_LE_TEST_END : allow to stop the transmitter test or receiver text command. 

>>> HCI_RESET : allow to reset the device.

>>> ACI_HAL_TONE_START : allow to set product in Tx continuous non modulated mode at dedicated frequency

>>> ACI_HAL_TONE_STOP : allow to stop the tone start command. 

Regards,

Sebastien.