Difference between revisions of "Net Power"

Revision as of 20:11, 20 January 2009

Net Power is defined as Forward Power minus the Reflected Power. This document describes the formula's that should be used to correctly calculate the Net Power.

**Given information**
Frequency [MHz]	Forward Power [dBm]	Reflected Power [dBm]
201,973	50	30

Question: What is the Net Power?

Answer: 49,95635195 dBm

First you calculate the dBm values to linear values.

$50\ dBm=10^{\frac {50}{10}}\ mW=100\ W$

$30\ dBm=10^{\frac {30}{10}}\ mW=1\ W$

Subtract the linear values

$Net\ Power=Fw-Rf=100-1=99\ W$

Convert the value to dBm again:

$10*log10(99*1000)\approx 49,95635195\ dBm$

@@ Line 1: / Line 1: @@
-[[Net Power]] defined as [[Forward Power]] minus the [[Reflected Power]]
+[[Net Power]] is defined as [[Forward Power]] minus the [[Reflected Power]]. This document describes the formula's that should be used to correctly calculate the [[Net Power]].
-This document describes how you should calculate the [[Net Power]] correctly.
 {| border=1
 |+ '''''Given information'''''
 |-
-! Frequency (MHz)
+! Frequency [MHz]
-! Forward Power (dBm)
+! Forward Power [dBm]
-! Reflected Power (dBm)
+! Reflected Power [dBm]
 |-
 ! 201,973 || 50 || 30