Difference between revisions of "Net Power"
Line 1: | Line 1: | ||
[[Net Power]] defined as [[Forward Power]] minus the [[Reflected Power]] | [[Net Power]] defined as [[Forward Power]] minus the [[Reflected Power]] | ||
− | This document describes how you should calculate the [[Net | + | This document describes how you should calculate the [[Net Power]] correctly. |
{| border=1 | {| border=1 | ||
Line 14: | Line 14: | ||
'''Question:''' What is the Net Power? | '''Question:''' What is the Net Power? | ||
− | '''Answer:''' | + | '''Answer:''' 49,95635195 dBm |
== The calculation == | == The calculation == | ||
− | First you calculate the | + | First you calculate the dBm values to linear values. |
− | <math> | + | <math> 50 \ dBm = 10^{\frac{50}{10}} \ mW = 100\ W</math> |
+ | <math> 30 \ dBm = 10^{\frac{30}{10}} \ mW = 1\ W</math> | ||
− | + | Subtract the linear values | |
+ | <math> Net \ Power = Fw - Rf = 100 - 1 = 99 \ W</math> | ||
− | + | Convert the value to dBm again: | |
− | <math> | + | <math>10 * log10(99 * 1000) \approx 49,95635195 \ dBm</math> |
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
[[Category:RadiMation]] | [[Category:RadiMation]] | ||
[[Category:Calculation]] | [[Category:Calculation]] |
Revision as of 13:40, 13 June 2008
Net Power defined as Forward Power minus the Reflected Power This document describes how you should calculate the Net Power correctly.
Frequency (MHz) | Forward Power (dBm) | Reflected Power (dBm) |
---|---|---|
201,973 | 50 | 30 |
Question: What is the Net Power?
Answer: 49,95635195 dBm
The calculation
First you calculate the dBm values to linear values.
Subtract the linear values
Convert the value to dBm again: