Power radio digimesh xbee3

I have passed CE certification with my xbee 3 digimesh, power output si 8db (max) but I mesured in laboratory only 0 or 1 db max.
Do you have solve?
Thank you.

What is the full part number for the module in question?

0013 A200 41E1 B234

I use micropython in xbee
Thank you

That is the Serial number of the module and not the part number. The part number would be something like xb3-24-aui-001

You are measuring the power level directly at the module and not with an antenna connected. The EU may allow 8dB, but that is peak power including the antenna.