nrf52833's BLE/RF mouse in EMC certification

[wzszzxj]

Hi,All:

  As the topic,How to set the BLE in a fixed frequency and carrier test? and  modulation test?

[Simonr]

Hi

Please check out our SDK's Direct Test Mode application, which enables DTM test functions described in Bluetooth spec. v5.2, Vol. 6, Part F. You can also check out the application note we have on setting up production tests using DTM if that's of interest.

Best regards,

Simon

[wzszzxj]

Hi，Simonr：

      Thank you for your reply! Now what is amasing is how to find the helper document expaining for the function  followed:

void radio_tx_carrier_test(unsigned char freq_ch)
{
NRF_RADIO->TASKS_TXEN = 0;
NRF_POWER->DCDCEN = 0;

NRF_RNG->TASKS_START = 1;

// Start 16 MHz crystal oscillator
NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
NRF_CLOCK->TASKS_HFCLKSTART = 1;

// Wait for the external oscillator to start up
while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
{
// Do nothing.
}

NRF_RADIO->SHORTS = 0;
NRF_RADIO->EVENTS_DISABLED = 0;
//NRF_RADIO->TEST = 0;
NRF_RADIO->TASKS_DISABLE = 1;
while (NRF_RADIO->EVENTS_DISABLED == 0)
{
// Do nothing.
}
NRF_RADIO->EVENTS_DISABLED = 0;

NRF_RADIO->SHORTS = RADIO_SHORTS_READY_START_Msk;
NRF_RADIO->TXPOWER = (4 << RADIO_TXPOWER_TXPOWER_Pos);
NRF_RADIO->MODE = (RADIO_MODE_MODE_Nrf_2Mbit << RADIO_MODE_MODE_Pos);
if(freq_ch==0) NRF_RADIO->FREQUENCY = 0;
else if(freq_ch==1) NRF_RADIO->FREQUENCY = 40;
else if(freq_ch==2) NRF_RADIO->FREQUENCY = 79;
//NRF_RADIO->TEST = (RADIO_TEST_CONSTCARRIER_Enabled << RADIO_TEST_CONSTCARRIER_Pos) \
// | (RADIO_TEST_PLLLOCK_Enabled << RADIO_TEST_PLLLOCK_Pos);

NRF_RADIO->TASKS_TXEN = 1;
NRF_POWER->DCDCEN = 1;
}

and how to explain the all the staments?