# It will be on but there something written on screen said db_rr.how can i back it into a norma?

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Posted on Sep 05, 2010

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
Goodluck!

Posted on Jan 02, 2017

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### DB to Power ratio using antilog

The conversion formula is
# dB =10*log(Pout/Pin) for say an amplifier.
Pout/Pin= 10^4 then #dB =10*log(10^4)=10*4=40 dB

Let us take a less obscure exemple

# dB= 57.39, what is the power ratio?
10*log(Pout/Pin)= 57.39
log(Pout/Pin)=57.39/10=5.739
Pout/Pin=Ratio =10^(5.739)= 548276.9649, not a number you would hear or see quoted, but a correct value.

To calculate the power ratio
1. Convert the decibels in Bels (divide by 10)
2. While the number just calculated is still in Answer memory (ANS), press [SHIFT] [LOG] to access the the 10^x function
3. Press [SHIFT][(-)] to enter (ANS)
4. Close the parenthesis [)]
5. Press [ENTER]
Here is the screen capture for the calculation one way and back.

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