Meaning of Rampa P1-P2-P3

[hgarfa2008]

Hello,

Can you further explain what the P1-P2-P3 values are?
I know they can be modified after a calibration procedure using a powermeter, but I would like to know what they correspond to and how increasing/decreasing the values impacts the Rampa resistance.

I could not find anything about it in the Rampa manual, neither in the forum.

Regards,
Hervé Garfagni.