CYW20706 Tx Power configuring

[adam]

Hi, 

I am curious about what is the correct max Tx Power for CYW20706, 

from specification it said +12dbm

 , but according to URL, it said max Tx Power is +8dbm https://community.infineon.com/t5/Resource-Library/Configuring-Transmit-Tx-power-on-the-CYW20706/ta-...

if I configure .max_pwr_db_val  = 9 and wiced_bt_ble_set_adv_tx_power multiple of 4 from +8 dBm to -16 dBm, it seems work.

 The below picture is my roughly test.

Is it possible to configure tx power to +12dbm?

And how to configure .max_pwr_db_val ?

[DheerajPK_41 · Accepted solution]

Hi,

You can refer to the spec for the actual max/min/typical power values. The integer value input to the API as an argument is an indicative value only. It is not the actual power. 

max_pwr_db_val  can be configured in the wiced_bt_cfg.c/h file. Allowed range is 0 to 10dBm.

May I know how you are measuring the tx power? If it is RSSI, the power depends upon various factors of the receiving device, antenna, etc. 

Thanks,

-Dheeraj.P.K

[adam]

Hi @DheerajPK_41, 

If I config max_pwr_db_val  as 10 and call wiced_bt_ble_set_adv_tx_power (10), Tx power will be the maximum of CYW20706, is it right?

I use spectrum to measure Tx power of CYW20706, and find the biggest peak.

when I call wiced_bt_ble_set_adv_tx_power(10), the value is 8.425dbm.