Set +3dbm power on nrf5340

[mapg]

Hello,

We want to set Tx power of +3dbm i followed the procedure as mentioned in following ticket:

 nRF5340 Radio Tx power 

I set the high voltage in network core main as following:

	nrf_vreqctrl_radio_high_voltage_set(NRF_VREQCTRL, true);
	while(!nrf_vreqctrl_radio_high_voltage_check(NRF_VREQCTRL));
	if (nrf_vreqctrl_radio_high_voltage_check(NRF_VREQCTRL)) {
		LOG_DBG("VREQH configuration success");
	} else {
		LOG_DBG("VREQH configuration failed");
	}

we set value 3 using 

bt_hci_cmd_send_sync(BT_HCI_OP_VS_WRITE_TX_POWER_LEVEL,

buf, &rsp);

While testing with analyzer we get +1.8dbm value.

Can you help us how we can get exact +3dbm?

Regards

[Hieu]

Hello mapg,

May I ask two questions please:

- What kind of setup you used to measure the TX Power?

- What board did you use analyze?

Best regards,

Hieu

[mapg]

Hello Hieu,

This measurement is from our certification lab. I am really unaware of the method they use.
With the Spectrum analyzer Tx power is even less around 1dbm.

We have our custom hardware with nrf5340 on it.

Regards

[mapg]

Any help on it Hieu . We want to send some devices for the certification tests and we are not able to get the results for our local tests.

[Hieu]

Hi mapg,

There are no known issues in software that could lead to your observation.

What SDK version are you working on? I notice you are not using a public API, could you please give some insights into why you made that decision?

It could also very well be something with your hardware design. We could take a look at your hardware files. If you wish to proceed with that, let's turn this question into a private one and continue.

Best regards,

Hieu

[mapg]

Hi Hieu.

I am using ncs 1.9.1. Which is the public API for this configuration?