Maximum TX power on MM8108-EKH19

General
1

Hi Morse Micro team,

The maximum TX power of MM8108-EKH19 as mentioned in the datasheet is 26dBm

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But when we check it via the webGUI it is limited to 22dBm.

I even tried to increase the TX power using “iw wlan0 set txpower fixed 2600”, but it is also limited to 22dBm.

Thanks,

Arti

2

Hi Arti,

26dBm is the maximum rating for the TX power of the chip itself.

In actual applications it’s got a few layers of constraints, firstly the SEM and EVM requirements of the 802.11ah, followed by the spectral requirements from your region’s regulatory body. The MCS has a role in determining the former two. There’s also insertion losses when you’re measuring externally.