FotS

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===LOG10 and dB Maths Functions===

Two useful math functions:

The common logarithm function. The natural logarithm of x divided by the natural logarithm of 10.

[[https://www.mathsisfun.com/algebra/logarithms.html|Logarithms huh?]]\\

... and the dB function to calculate the logrithmic ratio between two powers (which requires the common log function).

Both return Floats as the result

**Syntax**:
    =LOG10(expression)

    =dB(Power1,Power2)


**Examples**:
    x=LOG10(2.88)

    =dB(1,0.001)

**Code**:
<code>  
	'Common Log - the natural log of x divided by the natural Log of 10
	Function Log10(x As Float) As Float
		Log10=Log(x)/2.302585093
	End Function
	
	'calculate ratio between two powers as deciBels, P1 & P2 are in Watts. For dBm, specify P2=0.001
	Function dB(P1 As Float,P2 As Float) As Float
		dB=10*Log10(P1/P2)
	End Function
</code>