Engineers often measure the ratio of two power measurements in decibels, or dB.
ID: 671050 • Letter: E
Question
Engineers often measure the ratio of two power measurements in decibels, or dB. The equation for the ratio of two power measurements in decibels is dB = 10log10p2/p1, where P2 is the power level being measured, and Pi is some reference power level. A value of 1 mW is commonly used for the reference level Pi with the decibel unit is dBm. Write a program that accepts an input power P2 and converts it into dB with respect to the 1 mW reference level. Provide an appropriate prompt for the user input and format the output with a description and unitsExplanation / Answer
Matlab file that prompts for power P2 value and converts to decibels and print the result
Save as p2d.mat matlab file
'prompt for user input value for P2
P2=input('Enter power ,P2')
'P1 referenece value 1 watt
P1=1
'set 1watt=1000mwatt
'use the formula to convert from power ratio
'to decimals
'log10 is the logarithmetic fuction
db=10*log10(1000*P2/P1)
'print message
fprintf("Conversion from power to decibels is ")
'print decibels values for two decimals
format bank
fprintf("Conversion of power P2 value %f watt is %0.2f dBm",P2 , db)
Hope this helps you
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