Separate transmit power setting for BLE and Thread when using MPSL

[Jon]

Hello,

I have a design where I am using an nRF52840 along with a SKY66112-11 and am using Zephyr/MPSL for both BLE and Thread. Some questions:

1) The .dts node has pa_gain_db and lna_gain_db parameters, which default to ~20dBm and ~11dBm for the skyworks part. What are these parameters actually used for by the MPSL library? Do they affect CSMA thresholds, etc?

2) How do I reduce BLE transmit power such that BLE still operates at ~0dBm (which is our desired operation for BLE) while still allowing the Thread packets to transmit at high power?

I noticed that there is a CONFIG_BT_CTLR_TX_PWR setting in Zephyr but that does not seem to have any effect.

Thanks

Jon

[Jon]

Update: I have also tried the following code in an attempt to alter the BLE TX power (tested by monitoring advertisement power levels). However, this code has no effect:

static mpsl_tx_power_envelope_t sEnvelope =
{
.phy = MPSL_PHY_BLE_1M,
.envelope = {-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6}
};

mpsl_tx_power_channel_map_set(&sEnvelope);

FYI - I am using NCS/Zephyr along with OpenThread

Jon