Logarithm in PBP

[savnik]

read from previous posts :

<< I want to measure the volts at the input of pic , and show on LCD the power >>

Could you give me a decent explanation ???

Alain

I have a linear for FM and i want to measure the power.
From the power meter i take the indication which is in volt.This volt i want to show on LCD. But the power change in logarithm scale and this is my problem.