RE: Channel Sounding and Sub mode

witc — Fri, 27 Jun 2025 06:41:28 GMT

Thank you, Sorry for my stupid mistake in comment. But got the idea

RE: Channel Sounding and Sub mode

Edvin — Thu, 26 Jun 2025 13:32:14 GMT

Hello,

Note that mode 2 = PBR, mode 1 is RTT, and mode 3 is both. So the inline comment on the second line is incorrect. Please see these two descriptions:

https://docs.nordicsemi.com/bundle/zephyr-apis-latest/page/structbt_le_cs_create_config_params.html

https://docs.nordicsemi.com/bundle/zephyr-apis-latest/page/structbt_le_cs_create_config_params.html#a2bdbff2e20106e4a6925a8018d491a9c

But the idea is correct. You can set it to use both in the main mode, and then have only one of them in the sub mode. That means that you will have a bit more of the type you set in sub mode than the other one, overall.

And as you say, the sub mode will be started between 2 and 5 main mode steps with this configuration. It is possible to set both to e.g. 2, which would mean that you will always do 2 main steps, and then one sub step, and repeat.

[quote user=""]How does the CS system know when to use sub mode?[/quote]

This is scheduled by the SoftDevice controller to match your configuration.

Best regards,

Edvin