Hi,
Look I here again of this time I need to convert DBm to Watt, However had find great difficulty .
The arithmetic is :
Watt = ( 10 ^ (DBm/10)) * 0.001)
Exemple: ( 10 ^ (20.5/10)) * 0.001 = 0,112 Mw
My dificulty how elevate a number fractional exponent in base 10. ( ex: 10 ^ 2,05 )
I do get a bunch of subroutine of this site of division and mult through the our friend, Henk that I thank he.
But, I see't a apparent solution.
Can you help ? I'm in difficulty !!
Is float point the solution ? Not even know how operate.
You have patience with me.
My PLL already is working, thank you them for help me.

Thank you

Calix