How to configure Zigbee tx power in multiprotocol

[longrain]

I plan to test BLE and Zigbee communication range in multiprotocol examples.

And I haven't found how to configure Zigbee tx power.

Questions:

1. Is the tx  power of BLE and Zigbee  configured seperately?

2. How to configure Zigbee tx power? 

Thanks very much..

[longrain]

ADD:

zb_ret_t zb_set_tx_power(zb_uint8_t tx_power);

Any introduction about this function and its param?

I call it before  and after  "zboss_start()",but both situation return -1.

[haakonsh]

1. Yes, with the SoftDevice you use sd_ble_gap_tx_power_set.
2. You should not use zb_set_tx_power, but rather nrf_802154_tx_power_set. 

[longrain]

Thanks.