why nRF54L15 cannot use the automatic mpsl power split?

RE: why nRF54L15 cannot use the automatic mpsl power split?

Elfving — Thu, 04 Jun 2026 11:33:20 GMT

[quote user="Ziyao Zhou"]

Do you know when it will be officially support?

[/quote]

For this, you would have to ask your local RSM (regional sales manager), let me know if you need his contact info.

[quote user="Ziyao Zhou"]What could I do now, if I want to use 20 dBm，I have to set MCU to 0 dBm and FEM with 20 dBm?[/quote]

This is currently not supported by NCS. Currently, for the nRF54, we can set the power level to that supported by the SoC.

Ziyao Zhou — Tue, 02 Jun 2026 11:02:55 GMT

Do you know when it will be officially support?

What could I do now, if I want to use 20 dBm，I have to set MCU to 0 dBm and FEM with 20 dBm?

Elfving — Tue, 02 Jun 2026 10:41:19 GMT

Hi, I believe the issue is that ESB on the nRF54 series does not "officially" support FEM yet.

Ziyao Zhou — Mon, 01 Jun 2026 10:01:01 GMT

Hi，

I have go througput this ticket

I found that they can use esb_set_tx_power(22), when I try on my nRF54L15+21540 it can not run. it will show that:

"TX power to enumerator conversion failed, defaulting to 0 dBm "

And then I go through SDK 3.3.0 esb.c, find that the power cannot split under nRF54L15.

Elfving — Mon, 01 Jun 2026 09:08:03 GMT

Hi,

First of all, could you explain a bit how you are seeing this not working on your side? I would assume nRF54L supported power split.

Regards,

Elfving