Could nRF52840 adjust the BLE TX power of each channel separately?

[RongLinQin]

Hello nordic support:

        Our device used nRF52840, when do RSE testing , band edge failed when channel 39  TX at 0dBm.  We want to reduce ch39‘s TX power alone. Could nRF52840 adjust the BLE TX power of each channel separately? 

        Thanks!

BRs

Qin, Rong-Lin

[Jørgen Holmefjord]

Hi,

The nRF52840 hardware does not have any registers to configure the TX output power for each channel. The RADIO peripheral have a single TXPOWER register where the applied TX Power setting is set and used for the current channel. The RADIO peripheral will be reconfigured for each change in transmit parameters (channels, data, etc), so this is generally not a limitation.

From the application, the MultiProtocol Service Layer (MPSL) in nRF Connect SDK supports setting a maximum TX Power envelope with separate TX power configuration for each channel and PHY. MPSL is use by both the Softdevice Controller for BLE and IEEE 802.15.4 Radio driver for Thread and Zigbee protocols.

Best regards,
Jørgen