Effective range of transmission strength set in sd_ble_gap_tx_power_set();​​​​​​​

[Shuto Kimura]

Hello, 

I'm thinking of increasing the transmit strength of my peripheral device using the function provided below.

sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV , NULL, 4);​​​​​​​

I have two questions.

・If I don't use this function, is the default transmit strength 0dbm?

・If the above function raises the transmission strength of the advertising packet to 4dbm, is the transmission strength 4dbm after the connection is established? Is it 0dbm?

Also, is it possible to improve the reception sensitivity with softdevice or nRF library settings?

Thank you.

[Jared]

Hi,

・If I don't use this function, is the default transmit strength 0dbm?

Yes,

・If the above function raises the transmission strength of the advertising packet to 4dbm, is the transmission strength 4dbm after the connection is established? Is it 0dbm?

The transmission strength is still 4 dBm after connection.

Also, is it possible to improve the reception sensitivity with softdevice or nRF library settings?

Not really, sensitivity is highly decided by the antenna and your RF implementation. If you're using CSP package then there is a couple of dB gained in sensitivity of choosing LDO versus DC/DC ,but it's probably not enough to be worth the added current current consumption of changing the regulator mode. 

regards

Jared